1. **popupTheme**

   Specifies the theme to use when inflating popup menus. By default, uses the same theme as the `Toolbar` itself.

2. **theme**

   It is simply the theme of `Toolbar`.

I am trying to reduce an array of objects to a set in Swift and this is my code:

    objects.reduce(Set&lt;String&gt;()) { $0.insert($1.URL) }

However, I get an error:

    Type of expression is ambiguous without more context.

I do not understand what the problem is, since the type of URL is definitely String. Any ideas?

Reduce array to set in Swift

After updating to VS 2015 update 1, if I run a web project (MVC), stop the application, then try to run it again, VS stops and pops up a dialog claiming 

&gt; You are debugging a Release build of `&lt;myproject.dll&gt;`.
&gt; 
&gt; Using Just My Code with release builds using compiler optimizations results in a degraded debugging experience (e.g. breakpoints won&#39;t be hit).

The problem is I&#39;m _not running a release build._ I&#39;m clearly running the (same) debug build I just ran! Why does VS think I&#39;m running a release build? 

Cleaning the solution and re-running clears the error message, so something is hosed somewhere.

VS 2015 Update 1 - Claiming I am debugging a release build

Often I see this declaration of Toolbar in layout files:

    &lt;android.support.v7.widget.Toolbar
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;?attr/actionBarSize&quot;
        app:theme=&quot;@style/ThemeOverlay.AppCompat.Dark.ActionBar&quot;
        app:popupTheme=&quot;@style/ThemeOverlay.AppCompat.Light&quot;&gt;
    &lt;/android.support.v7.widget.Toolbar&gt;

Why are there two attributes relating theming: theme and popupTheme?&lt;br/&gt;&lt;br/&gt;
What are the purposes of each of them?

android toolbar popupTheme vs theme

Often I see this declaration of Toolbar in layout files:
<pre><code class="hljs language-ini">&#x3C;android.support.v7.widget.Toolbar
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="?attr/actionBarSize"
 app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
 app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
&#x3C;/android.support.v7.widget.Toolbar>
</code></pre>
Why are there two attributes relating theming: theme and popupTheme? 
What are the purposes of each of them?

I am new to android environment. I know iOS can be done in Xcode to disable device orientation. How can I disable landscape mode or any orientation mode in React Native Android?

Thanks.

How to disable landscape mode in React Native Android dev mode?

I am using recylerview in my application and whenever new element is added to recyclerview, it scrolls to last element by using

    recyclerView.scrollToPosition(adapter.getCount());

But, whenever keyboard opens(because of editTextView), it resizes the view and recyclerview gets smaller, but couldn&#39;t scroll to last element.

    android:windowSoftInputMode=&quot;adjustResize&quot;

I even tried to used the following code to scroll to last element, but it didn&#39;t work

    editTextView.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if(hasFocus){
                    recyclerView.scrollToPosition(chatAdapter.getItemCount());
                }
            }
        });

I can try `adjustPan` to shift the pan up, but it is hiding my toolbar.
Please suggest any way to rectify the issue.

Recyclerview not scrolling to end when keyboard opens

When adding permissions to my manifest file, the below xml works.

     &lt;permission android:name=&quot;android.permission.ACCESS_FINE_LOCATION&quot; /&gt;

However, this xml doesn&#39;t work.

    &lt;uses-permission android:name=&quot;android.permission.ACCESS_FINE_LOCATION&quot; /&gt;

Which one am I supposed to be using? If it&#39;s the first one, why wouldn&#39;t it work? How can I fix it?


Also, I am getting an Android 6.0 runtime permissions related exception:

    java.lang.SecurityException: &quot;gps&quot; location provider requires ACCESS_FINE_LOCATION permission.

When I try to add the permission to a String array in order to check the permission, Android Studio tells me it can&#39;t resolve `Manifest.permission` in the  below  code:

    new String[]{Manifest.permission.ACCESS_FINE_LOCATION}

Why would it be doing this? How can I fix it?




Cannot resolve Manifest.permission.ACCESS_FINE_LOCATION

If you use the Vector Asset wizard in Android Studio 1.5.0, any vector drawable XML you import using that wizard goes into `res/drawable/`.

However, the `build/` directory, and the resulting APK show that those XML files get moved into a `res/drawable-anydpi-v21/` resource directory. The `-v21` part makes sense, as `VectorDrawable` is only supported on API Level 21+. However, `-anydpi` seems to be undocumented. I would have expected `-nodpi`, both for the original import destination and for where the build system elects to move it.

Has anyone seen official statements for what `-anydpi` means, and what its relationship is with `-nodpi`? I am looking for practical effects, not merely what some code comments hint at.

What Is The Difference Between -anydpi And -nodpi?

Background
--

I&#39;m assigned to make a UI that behaves similarly to how Google Maps shows a bottom-sheet for a found result.

It has three different phases:

1. Bottom content. The upper area is still touchable and won&#39;t scroll anything at the bottom
2. Full-screen content, while the upper area has a large header.
3. Full-screen content, while the upper area has just the toolbar.

Here&#39;s what I&#39;m talking about on Google Maps:

[![Enter image description here][1]][1]

The problem
--

Thing is, the bottom sheet isn&#39;t a part of the design library yet (though it was requested, [**here**][2]).

Not only that, but the UI seems quite complex and needs handling of the toolbar on multiple phases.

What I&#39;ve tried
--

I&#39;ve found a good (enough) library for the bottom sheet ([**here**][3]), and added content to its fragment sample, to have about the same views as shown on material design samples (like [**here**][4]), to have a CollapsingToolbarLayout that will take care of phases 2+3.

In the app I&#39;m making, I also have to move an icon as you scroll, but I think that if I succeed with the rest, this should be easy.
Here&#39;s the code:

###fragment_my.xml

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;android.support.design.widget.CoordinatorLayout
        android:id=&quot;@+id/main_content&quot;
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;&gt;

        &lt;android.support.design.widget.AppBarLayout
            android:id=&quot;@+id/appbar&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;@dimen/detail_backdrop_height&quot;

            android:theme=&quot;@style/ThemeOverlay.AppCompat.Dark.ActionBar&quot;&gt;

            &lt;android.support.design.widget.CollapsingToolbarLayout
                android:id=&quot;@+id/collapsing_toolbar&quot;
                android:layout_width=&quot;match_parent&quot;
                android:layout_height=&quot;match_parent&quot;

                app:contentScrim=&quot;?attr/colorPrimary&quot;
                app:expandedTitleMarginEnd=&quot;64dp&quot;
                app:expandedTitleMarginStart=&quot;48dp&quot;
                app:layout_scrollFlags=&quot;scroll|exitUntilCollapsed|snap&quot;&gt;

                &lt;ImageView
                    android:id=&quot;@+id/backdrop&quot;
                    android:layout_width=&quot;match_parent&quot;
                    android:layout_height=&quot;match_parent&quot;
                    android:scaleType=&quot;centerCrop&quot;
                    app:layout_collapseMode=&quot;parallax&quot;/&gt;

                &lt;android.support.v7.widget.Toolbar
                    android:id=&quot;@+id/toolbar&quot;
                    android:layout_width=&quot;match_parent&quot;
                    android:layout_height=&quot;?attr/actionBarSize&quot;
                    app:layout_collapseMode=&quot;pin&quot;
                    app:popupTheme=&quot;@style/ThemeOverlay.AppCompat.Light&quot;/&gt;
            &lt;/android.support.design.widget.CollapsingToolbarLayout&gt;
        &lt;/android.support.design.widget.AppBarLayout&gt;

        &lt;android.support.v4.widget.NestedScrollView
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;match_parent&quot;
            app:layout_behavior=&quot;@string/appbar_scrolling_view_behavior&quot;&gt;

            &lt;LinearLayout
                android:layout_width=&quot;match_parent&quot;
                android:layout_height=&quot;match_parent&quot;
                android:orientation=&quot;vertical&quot;
                android:paddingTop=&quot;24dp&quot;&gt;

                &lt;android.support.v7.widget.CardView
                    android:layout_width=&quot;match_parent&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:layout_margin=&quot;@dimen/card_margin&quot;&gt;

                    &lt;LinearLayout
                        style=&quot;@style/Widget.CardContent&quot;
                        android:layout_width=&quot;match_parent&quot;
                        android:layout_height=&quot;wrap_content&quot;&gt;

                        &lt;TextView
                            android:layout_width=&quot;match_parent&quot;
                            android:layout_height=&quot;wrap_content&quot;
                            android:text=&quot;Info&quot;
                            android:textAppearance=&quot;@style/TextAppearance.AppCompat.Title&quot;/&gt;

                        &lt;TextView
                            android:layout_width=&quot;match_parent&quot;
                            android:layout_height=&quot;wrap_content&quot;
                            android:text=&quot;@string/cheese_ipsum&quot;/&gt;
                    &lt;/LinearLayout&gt;
                &lt;/android.support.v7.widget.CardView&gt;

                &lt;android.support.v7.widget.CardView
                    android:layout_width=&quot;match_parent&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:layout_marginBottom=&quot;@dimen/card_margin&quot;
                    android:layout_marginLeft=&quot;@dimen/card_margin&quot;
                    android:layout_marginRight=&quot;@dimen/card_margin&quot;&gt;

                    &lt;LinearLayout
                        style=&quot;@style/Widget.CardContent&quot;
                        android:layout_width=&quot;match_parent&quot;
                        android:layout_height=&quot;wrap_content&quot;&gt;

                        &lt;TextView
                            android:layout_width=&quot;match_parent&quot;
                            android:layout_height=&quot;wrap_content&quot;
                            android:text=&quot;Friends&quot;
                            android:textAppearance=&quot;@style/TextAppearance.AppCompat.Title&quot;/&gt;

                        &lt;TextView
                            android:layout_width=&quot;match_parent&quot;
                            android:layout_height=&quot;wrap_content&quot;
                            android:text=&quot;@string/cheese_ipsum&quot;/&gt;
                    &lt;/LinearLayout&gt;
                &lt;/android.support.v7.widget.CardView&gt;

                &lt;android.support.v7.widget.CardView
                    android:layout_width=&quot;match_parent&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:layout_marginBottom=&quot;@dimen/card_margin&quot;
                    android:layout_marginLeft=&quot;@dimen/card_margin&quot;
                    android:layout_marginRight=&quot;@dimen/card_margin&quot;&gt;

                    &lt;LinearLayout
                        style=&quot;@style/Widget.CardContent&quot;
                        android:layout_width=&quot;match_parent&quot;
                        android:layout_height=&quot;wrap_content&quot;&gt;

                        &lt;TextView
                            android:layout_width=&quot;match_parent&quot;
                            android:layout_height=&quot;wrap_content&quot;
                            android:text=&quot;Related&quot;
                            android:textAppearance=&quot;@style/TextAppearance.AppCompat.Title&quot;/&gt;

                        &lt;TextView
                            android:layout_width=&quot;match_parent&quot;
                            android:layout_height=&quot;wrap_content&quot;
                            android:text=&quot;@string/cheese_ipsum&quot;/&gt;
                    &lt;/LinearLayout&gt;
                &lt;/android.support.v7.widget.CardView&gt;
            &lt;/LinearLayout&gt;
        &lt;/android.support.v4.widget.NestedScrollView&gt;

        &lt;android.support.design.widget.FloatingActionButton
            android:layout_width=&quot;wrap_content&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_margin=&quot;@dimen/fab_margin&quot;
            android:clickable=&quot;true&quot;
            android:src=&quot;@android:drawable/ic_menu_send&quot;
            app:layout_anchor=&quot;@id/appbar&quot;
            app:layout_anchorGravity=&quot;bottom|right|end&quot;/&gt;

    &lt;/android.support.design.widget.CoordinatorLayout&gt;

###MyFragment.java

    public class MyFragment extends BottomSheetFragment {

        @Nullable
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            final View view = inflater.inflate(R.layout.fragment_my, container, false);
            view.setMinimumHeight(getResources().getDisplayMetrics().heightPixels);
            CollapsingToolbarLayout collapsingToolbar = (CollapsingToolbarLayout) view.findViewById(R.id.collapsing_toolbar);
            collapsingToolbar.setTitle(&quot;AAA&quot;);
            final Toolbar toolbar = (Toolbar) view.findViewById(R.id.toolbar);
            final AppCompatActivity activity = (AppCompatActivity) getActivity();
            activity.setSupportActionBar(toolbar);
            activity.getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            //toolbar.setNavigationIcon(R.drawable.abc_ic_ab_back_mtrl_am_alpha);
            toolbar.setNavigationOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    NavUtils.navigateUpFromSameTask(getActivity());
                }
            });
            final ImageView imageView = (ImageView) view.findViewById(R.id.backdrop);

            Glide.with(this).load(R.drawable.cheese_1).centerCrop().into(imageView);
            return view;
        }
    }

###BottomSheetFragmentActivity.java

    public final class BottomSheetFragmentActivity extends AppCompatActivity {

        protected BottomSheetLayout bottomSheetLayout;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_bottom_sheet_fragment);
            bottomSheetLayout = (BottomSheetLayout) findViewById(R.id.bottomsheet);
            findViewById(R.id.bottomsheet_fragment_button).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    new MyFragment().show(getSupportFragmentManager(), R.id.bottomsheet);
                }
            });
            bottomSheetLayout.setShouldDimContentView(false);
            bottomSheetLayout.setPeekOnDismiss(true);
            bottomSheetLayout.setPeekSheetTranslation(200);
            bottomSheetLayout.setInterceptContentTouch(false);
            bottomSheetLayout.setDefaultViewTransformer(new BaseViewTransformer() {
                @Override
                public void transformView(final float translation, final float maxTranslation, final float peekedTranslation, final BottomSheetLayout parent, final View view) {
                    Log.d(&quot;AppLog&quot;, &quot;translation:&quot; + translation + &quot; maxTranslation:&quot; + maxTranslation + &quot; peekedTranslation:&quot; + peekedTranslation);
                }
            });
        }
    }

It almost works well. The only problem is the transition from #3 back to #2:

[![enter image description here][5]][5]

The question
--

What is wrong with the code? What can I do in order to achieve the required behavior?

  [1]: http://i.stack.imgur.com/3czMy.gif
  [2]: https://code.google.com/p/android/issues/detail?id=179483
  [3]: https://github.com/Flipboard/bottomsheet
  [4]: https://github.com/chrisbanes/cheesesquare
  [5]: http://i.stack.imgur.com/zvmR4.gif


How to mimic Google Maps&#39; bottom-sheet 3 phases behavior?

I develop own library module where I use `Snackbar`. 

Here is my Gradle file:

    apply plugin: &#39;com.android.library&#39;
    
    android {
        compileSdkVersion 23
        buildToolsVersion &quot;23.0.2&quot;
    
        defaultConfig {
            minSdkVersion 14
            targetSdkVersion 23
            versionCode 1
            versionName &quot;1.0&quot;
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile(&#39;proguard-android.txt&#39;), &#39;proguard-rules.pro&#39;
            }
        }
    }
    
    dependencies {
        compile fileTree(include: [&#39;*.jar&#39;], dir: &#39;libs&#39;)
        testCompile &#39;junit:junit:4.12&#39;
        compile &#39;com.android.support:appcompat-v7:23.1.1&#39;
        compile &#39;me.zhanghai.android.materialprogressbar:library:1.1.4&#39;
        compile &#39;com.android.support:design:23.1.1&#39;
    }

As you can see, I have added `import com.android.support:design:23.1.1`, but as result I get error:

   

&gt;  error: package android.support.design.R does not exist

How can I solve this problem?

Can&#39;t find android.support.design.widget.Snackbar in support design library

I try to update my Support Library up to 23.2.0 and face this error:

    Exception while inflating &lt;vector&gt;
    org.xmlpull.v1.XmlPullParserException: Binary XML file line #17&lt;vector&gt; tag requires viewportWidth &gt; 0
    at android.support.graphics.drawable.VectorDrawableCompat.updateStateFromTypedArray(VectorDrawableCompat.java:535)
    at android.support.graphics.drawable.VectorDrawableCompat.inflate(VectorDrawableCompat.java:472)
    at android.support.graphics.drawable.VectorDrawableCompat.createFromXmlInner(VectorDrawableCompat.java:436)
    at android.support.v7.widget.AppCompatDrawableManager$VdcInflateDelegate.createFromXmlInner(AppCompatDrawableManager.java:829)
    at android.support.v7.widget.AppCompatDrawableManager.loadDrawableFromDelegates(AppCompatDrawableManager.java:303)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:178)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:173)
    at android.support.v7.widget.TintTypedArray.getDrawable(TintTypedArray.java:60)
    at android.support.v7.widget.Toolbar.&lt;init&gt;(Toolbar.java:254)
    at android.support.v7.widget.Toolbar.&lt;init&gt;(Toolbar.java:196)
    at java.lang.reflect.Constructor.constructNative(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
    at android.view.LayoutInflater.createView(LayoutInflater.java:594)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
    at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)
    at com.chotot.vn.v2.activities.MainActivity.onCreate(MainActivity.java:121)
    at android.app.Activity.performCreate(Activity.java:5133)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
    at android.app.ActivityThread.access$600(ActivityThread.java:141)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)

And

    FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.chotot.vn.dev/com.chotot.vn.v2.activities.MainActivity}: android.view.InflateException: Binary XML file line #13: Error inflating class android.support.v7.widget.Toolbar
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
    at android.app.ActivityThread.access$600(ActivityThread.java:141)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)
    Caused by: android.view.InflateException: Binary XML file line #13: Error inflating class android.support.v7.widget.Toolbar
    at android.view.LayoutInflater.createView(LayoutInflater.java:620)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
    at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)
    at com.chotot.vn.v2.activities.MainActivity.onCreate(MainActivity.java:121)
    at android.app.Activity.performCreate(Activity.java:5133)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
    at android.app.ActivityThread.access$600(ActivityThread.java:141)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)
    Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Constructor.constructNative(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
    at android.view.LayoutInflater.createView(LayoutInflater.java:594)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
    at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)
    at com.chotot.vn.v2.activities.MainActivity.onCreate(MainActivity.java:121)
    at android.app.Activity.performCreate(Activity.java:5133)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
    at android.app.ActivityThread.access$600(ActivityThread.java:141)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)
    Caused by: android.content.res.Resources$NotFoundException: File res/drawable/abc_ic_ab_back_material.xml from drawable resource ID #0x7f020016
    at android.content.res.Resources.loadDrawable(Resources.java:2091)
    at android.content.res.Resources.getDrawable(Resources.java:695)
    at android.support.v7.widget.TintResources.superGetDrawable(TintResources.java:48)
    at android.support.v7.widget.AppCompatDrawableManager.onDrawableLoadedFromResources(AppCompatDrawableManager.java:374)
    at android.support.v7.widget.TintResources.getDrawable(TintResources.java:44)
    at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:323)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:180)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:173)
    at android.support.v7.widget.TintTypedArray.getDrawable(TintTypedArray.java:60)
    at android.support.v7.widget.Toolbar.&lt;init&gt;(Toolbar.java:254)
    at android.support.v7.widget.Toolbar.&lt;init&gt;(Toolbar.java:196)
    at java.lang.reflect.Constructor.constructNative(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
    at android.view.LayoutInflater.createView(LayoutInflater.java:594)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
    at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)
    at com.chotot.vn.v2.activities.MainActivity.onCreate(MainActivity.java:121)
    at android.app.Activity.performCreate(Activity.java:5133)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
    at android.app.ActivityThread.access$600(ActivityThread.java:141)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)
    Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #17: invalid drawable tag vector
    at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:897)
    at android.graphics.drawable.Drawable.createFromXml(Drawable.java:837)
    at android.content.res.Resources.loadDrawable(Resources.java:2087)
    at android.content.res.Resources.getDrawable(Resources.java:695)
    at android.support.v7.widget.TintResources.superGetDrawable(TintResources.java:48)
    at android.support.v7.widget.AppCompatDrawableManager.onDrawableLoadedFromResources(AppCompatDrawableManager.java:374)
    at android.support.v7.widget.TintResources.getDrawable(TintResources.java:44)
    at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:323)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:180)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:173)
    at android.support.v7.widget.TintTypedArray.getDrawable(TintTypedArray.java:60)
    at android.support.v7.widget.Toolbar.&lt;init&gt;(Toolbar.java:254)
    at android.support.v7.widget.Toolbar.&lt;init&gt;(Toolbar.java:196)
    at java.lang.reflect.Constructor.constructNative(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
    at android.view.LayoutInflater.createView(LayoutInflater.java:594)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
    at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)
    at com.chotot.vn.v2.activities.MainActivity.onCreate(MainActivity.java:121)
    at android.app.Activity.performCreate(Activity.java:5133)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
    at android.app.ActivityThread.access$600(ActivityThread.java:141)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)

My `activity_main.xml`

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;RelativeLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        android:orientation=&quot;vertical&quot;&gt;
    
        &lt;fragment
            android:id=&quot;@+id/f_actionbar&quot;
            android:name=&quot;com.chotot.vn.fragments.ActionBarFragment&quot;
            android:layout_width=&quot;fill_parent&quot;
            android:layout_height=&quot;wrap_content&quot; /&gt;
    
        &lt;android.support.v7.widget.Toolbar
            android:id=&quot;@+id/main_tool_bar&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;?attr/actionBarSize&quot;
            android:layout_alignParentTop=&quot;true&quot;
            android:background=&quot;@color/action_bar_bg&quot;&gt;
    
            &lt;RelativeLayout
                android:layout_width=&quot;match_parent&quot;
                android:layout_height=&quot;wrap_content&quot;&gt;
    
                &lt;include
                    android:id=&quot;@+id/main_action_bar_layout&quot;
                    layout=&quot;@layout/layout_actionbar_custom_search&quot;
                    android:layout_width=&quot;match_parent&quot;
                    android:layout_height=&quot;?attr/actionBarSize&quot;
                    android:layout_gravity=&quot;top&quot; /&gt;
    
                &lt;LinearLayout
                    android:id=&quot;@+id/main_action_bar_layout_content&quot;
                    android:layout_width=&quot;match_parent&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:layout_below=&quot;@id/main_action_bar_layout&quot;
                    android:orientation=&quot;vertical&quot; /&gt;
            &lt;/RelativeLayout&gt;
        &lt;/android.support.v7.widget.Toolbar&gt;
    
        &lt;FrameLayout
            android:id=&quot;@+id/layout_content&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;match_parent&quot;
            android:layout_below=&quot;@id/main_tool_bar&quot; /&gt;
    
    &lt;/RelativeLayout&gt;

**How can I fix it?**


Update Android Support Library to 23.2.0 cause error: XmlPullParserException Binary XML file line #17&lt;vector&gt; tag requires viewportWidth &gt; 0

I&#39;ve been using the new BottomSheetDialog added in [Support Library 23.2][1], but I want to change the default height of the dialog. I know it probably has to do with the `behavior_peekHeight` attribute which controls the initial height, but how do I set that in the `BottomSheetDialog` when I don&#39;t have direct access to the `BottomSheetBehavior`?


  [1]: http://android-developers.blogspot.com/2016/02/android-support-library-232.html

How do I change the default height of a BottomSheetDialog?

I&#39;m using the new vector drawable support in Support Lib v23.2 with app:srcCompat &amp; trying to set its drawable via data binding.

    &lt;layout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;&gt;

    &lt;data&gt;
        &lt;variable
            name=&quot;mediaPojo&quot;
            type=&quot;in.ishaan.pika.data_binding.MediaPojo&quot;/&gt;
    &lt;/data&gt;

    &lt;RelativeLayout
        android:background=&quot;@color/black&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;&gt;

        &lt;VideoView
            ... /&gt;

        &lt;ImageView
            ...
            app:srcCompat=&quot;@{mediaPojo.isPlaying ? @drawable/ic_pause_24dp : @drawable/ic_play_arrow_24dp}&quot;
        /&gt;

        &lt;ProgressBar
            .../&gt;
    &lt;/RelativeLayout&gt;
    &lt;/layout&gt;

On trying to build, studio throws:

&gt; Error:(33, 30) Cannot find the setter for attribute &#39;app:srcCompat&#39; with parameter type android.graphics.drawable.Drawable.

Data Binding with srcCompat

I&#39;m using an ```EditText``` inside a ```TextInputLayout```, but after upgrading the support library to 23.2.0, I get this warning in the logcat, What&#39;s the difference between a regular ```EditText``` and a ```TextInputEditText```? I can&#39;t seem to find any documentation for it.

EditText added is not a TextInputEditText. Please switch to using that class instead

I&#39;m facing a problem with the new backward compatibility with VectorDrawables.
In the Support Library 23.2 was a new feature for backward compatibility with Android VectorDrawables indroduced. 

I have an ImageView which is a SelectorDrawable assigned to. This Drawable holds several VectorDrawables so I thought I should use app:srcCompat for compatibility. But it does not work on my Galaxy S2 with android 4.1.2.

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;selector xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;&gt;
        &lt;item android:drawable=&quot;@drawable/ic_gps_fixed_24dp&quot;android:state_activated=&quot;true&quot; android:state_selected=&quot;true&quot;&gt;&lt;/item&gt;
        &lt;item android:drawable=&quot;@drawable/ic_gps_not_fixed_24dp&quot; android:state_activated=&quot;true&quot; android:state_selected=&quot;false&quot;&gt;&lt;/item&gt;
        &lt;item android:drawable=&quot;@drawable/ic_gps_not_fixed_24dp&quot; android:state_activated=&quot;false&quot; android:state_selected=&quot;true&quot;&gt;&lt;/item&gt;
        &lt;item android:drawable=&quot;@drawable/ic_gps_off_24dp&quot; android:state_activated=&quot;false&quot; android:state_selected=&quot;false&quot;&gt;&lt;/item&gt;
        &lt;item android:drawable=&quot;@drawable/ic_gps_not_fixed_24dp&quot;&gt;&lt;/item&gt;
    &lt;/selector&gt;

All drawables are vector xml files.

When using this SelectorDrawable with srcCompat I get this error:

      Caused by: android.content.res.Resources$NotFoundException: File res/drawable/  Caused by: android.content.res.Resources$NotFoundException: File res/drawable/ic_gps_fixed_24dp.xml from drawable resource ID #0x7f0201c1
                                                                               at android.content.res.Resources.loadDrawable(Resources.java:1951)
                                                                               at android.content.res.Resources.getDrawable(Resources.java:672)
                                                                               at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:173)
                                                                               at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:881).xml from drawable resource ID #0x7f0201c1
                                                                                  

using android:src is even worse.

If I use one of the vector drawables with app:srcCompat all works fine. So I guess it&#39;s a problem with the SelectorDrawable and compatibility.

Has anyone had the same problem and found a solution or is it currently not possible to use VectorDrawables in SelectorDrawables prior to Android 5?

The Quick Facts:

 - Compile Target API 23 
 - Support Libraray 23.3.0
 - vectorDrawables.useSupportLibrary = true 
 - Gradle 2.0

Android Selector Drawable with VectorDrawables srcCompat

How to set the `ImageButton` property of 

    app:srcCompat=&quot;@drawable/pic&quot;

programmatically?

Something like `myImageButton.setBackgroundResource(R.drawable.eng2);` but the property of `app:srcCompat`.

How to set ImageButton property of app:srcCompat=&quot;@drawable/pic&quot; programmatically?

I am having trouble running my Android app in a fullscreen mode per instructions of a video. When it tries to run, the app crashes with the error.

` &quot;You need to use a Theme.AppCompat theme (or descendant) with this activity`

Manifest File

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;manifest xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
    package=&quot;com.djsg38.hikerswatch&quot;&gt;

    &lt;uses-permission android:name=&quot;android.permission.ACCESS_FINE_LOCATION&quot; /&gt;
    &lt;uses-permission android:name=&quot;android.permission.ACCESS_COARSE_LOCATION&quot; /&gt;
    &lt;uses-permission android:name=&quot;android.permission.INTERNET&quot; /&gt;

    &lt;application
        android:allowBackup=&quot;true&quot;
        android:icon=&quot;@mipmap/ic_launcher&quot;
        android:label=&quot;@string/app_name&quot;
        android:supportsRtl=&quot;true&quot;
        android:theme=&quot;@style/AppTheme&quot;&gt;
        &lt;activity android:name=&quot;.MainActivity&quot;
            android:theme=&quot;@android:style/Theme.NoTitleBar.Fullscreen&quot; &gt;
            &lt;intent-filter&gt;
                &lt;action android:name=&quot;android.intent.action.MAIN&quot; /&gt;

                &lt;category android:name=&quot;android.intent.category.LAUNCHER&quot; /&gt;
            &lt;/intent-filter&gt;
        &lt;/activity&gt;
    &lt;/application&gt;

    &lt;/manifest&gt;

Styles File

    &lt;resources&gt;

    &lt;!-- Base application theme. --&gt;
    &lt;style name=&quot;AppTheme&quot; parent=&quot;Theme.AppCompat.Light.DarkActionBar&quot;&gt;
        &lt;!-- Customize your theme here. --&gt;
        &lt;item name=&quot;colorPrimary&quot;&gt;@color/colorPrimary&lt;/item&gt;
        &lt;item name=&quot;colorPrimaryDark&quot;&gt;@color/colorPrimaryDark&lt;/item&gt;
        &lt;item name=&quot;colorAccent&quot;&gt;@color/colorAccent&lt;/item&gt;
    &lt;/style&gt;

   &lt;/resources&gt;

Partial MainActivity that may be useful

    public class MainActivity extends AppCompatActivity {

How to fix: &quot;You need to use a Theme.AppCompat theme (or descendant) with this activity&quot;

[![Screenshot][1]][1]

Since today, Android Studio can&#39;t find the AppCompat themes in styles.xml, but for example AppCompatActivity in code does get recognized. My Android Studio version is 2.2.2, Build #AI-145.3360264

I already tried upgrading to the latest build tools, compile sdk (25) version etc. but it didn&#39;t fix the problem.

At the moment I have installed the following (from sdk manager):

 - android api: 19 and 23
 - sdk platform tools: 25.0.1
 - sdk tools: 25.2.3
 - build-tools: 23.0.2 and 25.0.1
 - support repository: 40
 - google repository: 39

and a few others, that shouldn&#39;t be necessary to list here.

build.gradle of app:

    apply plugin: &#39;com.android.application&#39;
    
    android {
        compileSdkVersion 23
        buildToolsVersion &#39;25.0.1&#39;
        defaultConfig {
            applicationId &quot;xxx.xxxxxxxx.xxxxxxxxx&quot; //not the real applicationId
            minSdkVersion 14
            targetSdkVersion 19
            versionCode 1
            versionName &quot;1.0&quot;
            testInstrumentationRunner &quot;android.support.test.runner.AndroidJUnitRunner&quot;
        }
        buildTypes {
            release {
                minifyEnabled true
                shrinkResources true
                proguardFiles getDefaultProguardFile(&#39;proguard-android.txt&#39;), &#39;proguard-rules.pro&#39;
            }
            debug {
    
            }
        }
    }
    
    dependencies {
        compile fileTree(include: [&#39;*.jar&#39;], dir: &#39;libs&#39;)
        compile files(&#39;libs/RootTools.jar&#39;)
        compile &#39;com.android.support:support-v4:23.+&#39;
        compile &#39;com.android.support:support-v13:23.+&#39;
        compile &#39;com.android.support:appcompat-v7:23.+&#39;
        compile &#39;com.android.support:design:23.+&#39;
        compile &#39;com.android.support:cardview-v7:23.+&#39;
        compile &#39;com.android.support.constraint:constraint-layout:1.0.0-beta4&#39;
        compile &#39;de.hdodenhof:circleimageview:2.1.0&#39;
    }


  [1]: https://i.stack.imgur.com/dMjYm.png



Cannot resolve symbol &#39;Theme&#39; in styles.xml (Android Studio)

After upgrading to appcompat `25.1.0` I&#39;ve started getting weird errors.

In my code:

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

I get lint error:

`AppCompatActivity.onCreate can only be called from within the same library group (groupId=com.android.support)`

How to prevent such behavior?


AppCompatActivity.onCreate can only be called from within the same library group

I have a `CoordinatorLayout` which contains `AppBarLayout` and a `FrameLayout` which contains fragments.

One of this fragment contains a `TabLayout` at Top, one List trough `RecyclerView` and at the Bottom one &quot;homemade&quot; toolbar.

The `AppBarLayout` is configured with `app:layout_scrollFlags=&quot;scroll|enterAlways&quot;` 

My problem is that both &quot;toolbars&quot; are hiding when scroll, the AppBarLayout and my &quot;homemade&quot; toolbar at the bottom. This is the current behaviour

[![enter image description here][1]][1]

I would like to fix the bottom &quot;homemade&quot; toolbar to keep visible but I can&#39;t achieve it.

This is the XML of the fragment Layout

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;LinearLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        android:orientation=&quot;vertical&quot;
        &gt;
        &lt;android.support.design.widget.TabLayout
            android:id=&quot;@+id/toolbarfilter&quot;
            android:layout_width=&quot;match_parent&quot;
            android:background=&quot;@color/azul_asde&quot;
            app:tabMode=&quot;fixed&quot;
            app:tabMaxWidth=&quot;0dp&quot;
            android:elevation=&quot;4dp&quot;
            app:tabIndicatorColor=&quot;@color/verde_pastel&quot;
            android:layout_height=&quot;wrap_content&quot;
            /&gt;
    
        &lt;android.support.v4.widget.SwipeRefreshLayout
            xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
            android:id=&quot;@+id/swipeContainer&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;0dp&quot;
            android:layout_weight=&quot;1&quot;&gt;
    
        &lt;android.support.v7.widget.RecyclerView
        android:id=&quot;@+id/list&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;/&gt;
        &lt;/android.support.v4.widget.SwipeRefreshLayout&gt;
    
            &lt;LinearLayout
            android:id=&quot;@+id/toolbarselection&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:orientation=&quot;horizontal&quot;
            android:paddingTop=&quot;10dp&quot;
            android:paddingBottom=&quot;10dp&quot;
            android:background=&quot;@color/azul_asde&quot;
            android:elevation=&quot;4dp&quot;
            android:visibility=&quot;visible&quot;
            &gt;
            &lt;ImageView
                android:id=&quot;@+id/delete&quot;
                android:layout_width=&quot;0dp&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_weight=&quot;1&quot;
                android:src=&quot;@drawable/ic_delete_white_24dp&quot;
                android:tint=&quot;@color/gris_desactivado&quot; /&gt;
            &lt;ImageView
                android:id=&quot;@+id/select&quot;
                android:layout_width=&quot;0dp&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_weight=&quot;1&quot;
                android:src=&quot;@drawable/ic_bookmark_border_white_24dp&quot;/&gt;
    
            &lt;ImageView
                android:id=&quot;@+id/send&quot;
                android:layout_width=&quot;0dp&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_weight=&quot;1&quot;
                android:src=&quot;@drawable/ic_send_white_24dp&quot;
                android:tint=&quot;@color/gris_desactivado&quot; /&gt;
    
        &lt;/LinearLayout&gt;
    
    &lt;/LinearLayout&gt;



**EDIT1:** [THIS][2]  questions seems to be the same problem.


  [1]: http://i.stack.imgur.com/dEhdS.gif
  [2]: https://stackoverflow.com/questions/30777698/android-footer-scrolls-off-screen-when-used-in-coordinatorlayout/33396965#33396965

Fix bottom bar in CoordinatorLayout

I want use `ToolBar` instead of `ActionBar`, but don&#39;t show me menu in toolbar!!! i want set menu such as **Refresh** or **Setting** buttons in `ActionBar`.&lt;br&gt;

[![enter image description here][1]][1]

**Toolbar.xml code :**

&lt;!-- language: lang-xml --&gt;

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;android.support.v7.widget.Toolbar
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;wrap_content&quot;
        android:background=&quot;?attr/colorPrimary&quot;
        android:minHeight=&quot;?attr/actionBarSize&quot;
        app:navigationContentDescription=&quot;@string/abc_action_bar_up_description&quot;
        app:popupTheme=&quot;@style/ThemeOverlay.AppCompat.Light&quot;
        app:theme=&quot;@style/ThemeOverlay.AppCompat.Dark.ActionBar&quot;
        app:title=&quot;Main Page&quot;
        android:gravity=&quot;center&quot;/&gt;

**MainPage.java code:**


&lt;!-- language: lang-java --&gt;

    public class MainPage extends AppCompatActivity {
        private Toolbar toolbar;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main_page);
    
            toolbar = (Toolbar) findViewById(R.id.main_toolbar);
            setSupportActionBar(toolbar);
            if (getSupportActionBar() != null) {
                getSupportActionBar().setTitle(&quot;Main Page&quot;);
            }
            toolbar.setSubtitle(&quot;Test Subtitle&quot;);
            toolbar.inflateMenu(R.menu.main_menu);
        }
    }

**main_menu.xml code :** 

&lt;!-- language: lang-xml --&gt;

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
    &lt;menu xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;&gt;
    
        &lt;item
            android:id=&quot;@+id/menu_main_setting&quot;
            android:icon=&quot;@drawable/ic_settings&quot;
            android:orderInCategory=&quot;100&quot;
            app:showAsAction=&quot;always&quot;
            android:actionLayout=&quot;@layout/toolbar&quot;
            android:title=&quot;Setting&quot; /&gt;
    
        &lt;item
            android:id=&quot;@+id/menu_main_setting2&quot;
            android:icon=&quot;@drawable/ic_settings&quot;
            android:orderInCategory=&quot;200&quot;
            app:showAsAction=&quot;always&quot;
            android:actionLayout=&quot;@layout/toolbar&quot;
            android:title=&quot;Setting&quot; /&gt;
    
    &lt;/menu&gt;

How to fix this problem and show menu in `Toolbar` ? thanks all dears &lt;3


  [1]: https://i.stack.imgur.com/R1qfam.png
  [2]: http://imgur.com/oDTKZxp

How to set menu to Toolbar in Android

[![Back button on toolbar](http://i.stack.imgur.com/iJ5BW.png)](http://i.stack.imgur.com/iJ5BW.png)

How can I set back arrow in Android toolbar and also apply click listener?

How to display and set click event on Back Arrow on Toolbar?

I am having the following problem:

I know how to set up a toolbar to show a back button icon instead of a burger button icon.
&lt;br&gt;&lt;br&gt;
From this:
&lt;br&gt;
[![enter image description here][1]][1]

to this:

[![enter image description here][2]][2]

using: `getSupportActionBar().setDisplayHomeAsUpEnabled(true);`

&lt;br&gt;Now, I want to do the reverse action, I want to go from back button icon to burger icon:

[![enter image description here][2]][2]

to here:

[![enter image description here][1]][1]

How can I do this?

**Update:**

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setSupportActionBar(mToolbar);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
    }

    private void enableViews(boolean enable) {
        if(enable) {
            // Enables back button icon
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        } else {
            // TODO: Enables burger icon
        }
    }

  [1]: http://i.stack.imgur.com/Sx26a.png
  [2]: http://i.stack.imgur.com/dF12T.png

Android - Switch ActionBar Back Button to Navigation Button

what is exact difference between `appbar`, `Toolbar`, `Actionbar`? and when to use them specifically?
I try to find about them but it make me confuse so can any buddy explain to me what is exact difference between them and when to use them or are this are the same name of the single component?

Content Type	Original Author	Original Content on Stackoverflow
Question	Vitaly Zinchenko	View Question on Stackoverflow
Solution 1 - Android	Nouman Ghaffar	View Answer on Stackoverflow

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