In the android studio(or more generally in the Intellij IDEA) you can specify inspection code that you want to analyze from **`Analyze-&gt;Inspect Code...`** and then define the scope of your code.
You can see the result for my code in the below picture:

[![enter image description here][1]][1]

In **`Declaration redundancy`** you can see that &quot;someMethod&quot; is declared unused. Also, in **`Probable bugs`** you can find variable **`i`** is never used.


  


  [1]: http://i.stack.imgur.com/X0vSQ.png

You can also install the `QAPlug via File -&gt; Settings -&gt; Plugins -&gt; Browse Repositories -&gt; QAPlug`.


For Mac:

    Android Studio -&gt; Preferences... -&gt; Plugins -&gt; Browse Repositories -&gt; QAPlug.


In QAPlug is PMD, FindBugs, Checkstyle and Hammurapi integrated.
These tools are very nice to find dead code, bugs, increase performance and make the code more readable.
I highly recommend those tools if you work for a bigger project. 

Nowadays its in Analyze-&gt;Inspect Code... and then you need to go to Kotlin | Redundant contructs | Unused symbol

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/tOkVz.png

Function `foo` prints to console. I want to test the console print. How can I achieve this in python?

Need to test this function, has NO return statement : 

    def foo(inStr):
       print &quot;hi&quot;+inStr

My test : 
    
    def test_foo():
        cmdProcess = subprocess.Popen(foo(&quot;test&quot;), stdout=subprocess.PIPE)
        cmdOut = cmdProcess.communicate()[0]
        self.assertEquals(&quot;hitest&quot;, cmdOut)




Python: Write unittest for console print

Background
--
I try to add the same functionality as shown on many apps, where the upper area of the screen shrinks&amp;expands according to the scrolled content.

For this, I use Google&#39;s design library, as shown on [**the CheeseSquare sample**][1].

The problem
--
Thing is, no matter how much content there is in the NestedScrollView , it lets me scroll way below the last view of the content, just to let me see the final state of the actionbar, having the minimal size of itself.

In short, this is what I see when scrolling to the bottom (modified content of CheeseSquare sample):

[![enter image description here][2]][2]

while this is what I&#39;d like to have when scrolling to the bottom (taken from contacts app) :

[![enter image description here][3]][3]

I&#39;m also trying to fix a bug on [**ThreePhasesBottomSheet**][4] sample that scrolling in the bottom sheet content is possible even when it&#39;s in peek-state. To reproduce, start scrolling horizontally (which doesn&#39;t do anything, as there is nothing to scroll this way) and then vertically, which would somehow trigger scrolling of the content of the bottom-sheet.

Therefore, I need to disable there the scrolling in &quot;transformView()&quot; method, in the case that &quot;translation&lt;maxTranslation&quot; , and enable otherwise.

This is how it works using normal usage:

[![enter image description here][5]][5]

And this is how it behaves with the bug of not blocking the scrolling:

[![enter image description here][6]][6]


What I&#39;ve tried
--
I&#39;ve tried to play with the &quot;[**layout_scrollFlags**][7]&quot; flags, to change the height to wrap_content, and to remove the clipToPadding and fitsSystemWindows attributes.

Here&#39;s the sample XML file, which I&#39;ve modified to include only a single cardView instead of many:

    &lt;android.support.design.widget.CoordinatorLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        xmlns:app=&quot;http://schemas.android.com/apk/res-auto&quot;
        android:id=&quot;@+id/main_content&quot;
        android:layout_width=&quot;match_parent&quot;
        android:layout_height=&quot;match_parent&quot;
        android:fitsSystemWindows=&quot;true&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;
            android:fitsSystemWindows=&quot;true&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:layout_scrollFlags=&quot;scroll|exitUntilCollapsed&quot;
                android:fitsSystemWindows=&quot;true&quot;
                app:contentScrim=&quot;?attr/colorPrimary&quot;
                app:expandedTitleMarginStart=&quot;48dp&quot;
                app:expandedTitleMarginEnd=&quot;64dp&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;
                    android:fitsSystemWindows=&quot;true&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:popupTheme=&quot;@style/ThemeOverlay.AppCompat.Light&quot;
                    app:layout_collapseMode=&quot;pin&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;/LinearLayout&gt;
    
        &lt;/android.support.v4.widget.NestedScrollView&gt;
    
        &lt;android.support.design.widget.FloatingActionButton
            android:layout_height=&quot;wrap_content&quot;
            android:layout_width=&quot;wrap_content&quot;
            app:layout_anchor=&quot;@id/appbar&quot;
            app:layout_anchorGravity=&quot;bottom|right|end&quot;
            android:src=&quot;@drawable/ic_discuss&quot;
            android:layout_margin=&quot;@dimen/fab_margin&quot;
            android:clickable=&quot;true&quot;/&gt;
    
    &lt;/android.support.design.widget.CoordinatorLayout&gt;

I&#39;ve tried the next code too :

    ((AppBarLayout.LayoutParams) collapsingToolbar.getLayoutParams()).setScrollFlags(0);

but this still allowed scrolling of the NestedScrollView itself in the [**CheeseSquare**][1] example, and also allowed flinging in the [**ThreePhasesBottomSheet**][4] sample . 


The questions
--
 1. What can I do in order to make the scrolling stop when there is no more content to show at the bottom?

 2. In addition, what can be done to disable scrolling of the NestedScrollView in any time I wish ( for the [**ThreePhasesBottomSheet**][4] sample) ? Something like &quot;setEnableScrolling(...)&quot; ? 

   I&#39;ve tried to extend NestedScrollView and also extend from ScrollingViewBehavior, but failed to find what can be done to disable the scrolling.

It&#39;s probably a very simple thing to change, but I can&#39;t find out what...


EDIT: if needed, this is what I currently use for the design&amp;support library

    compile &#39;com.android.support:appcompat-v7:23.1.0&#39;
    compile &#39;com.android.support:design:23.1.0&#39;

----

EDIT: for #2, I&#39;ve found a workaround from within the BottomSheetLayout.java file, to disable all that&#39;s related to the variable &quot;sheetViewOwnsTouch&quot;, as if it&#39;s always set to &quot;false&quot;. This will allow stealing touch events on the bottom sheet. However, this is just a workaround, and only for this case. It also causes some touch events that should have been handled by other views. I still wish to know how to block the scrolling programmatically, and also in the other case of enough-space-to-show-content.


  [1]: https://github.com/chrisbanes/cheesesquare
  [2]: http://i.stack.imgur.com/JYxsE.gif
  [3]: http://i.stack.imgur.com/t2qFA.gif
  [4]: https://github.com/AndroidDeveloperLB/ThreePhasesBottomSheet
  [5]: http://i.stack.imgur.com/fFVvm.gif
  [6]: http://i.stack.imgur.com/28tZR.gif
  [7]: http://developer.android.com/reference/android/support/design/widget/AppBarLayout.LayoutParams.html#setScrollFlags(int)

How to disable scrolling of NestedScrollView&amp;CollapsingToolbarLayout, for example when there is no more content below?

How can I find all **unused methods and variables** of my project in the **Android Studio IDE**?

How can I find all unused methods of my project in the Android Studio IDE?

How can I find all unused methods and variables of my project in the Android Studio IDE?

I have a [Kafka][1] cluster running with 2 partitions. I was looking for a way to increase the partition count to 3. However, I don&#39;t want to lose existing messages on the topic. I tried stopping [Kafka][1], modifying the `server.properties` file to increase the number of partitions to 3 and restart Kafka. However, that does not seem to change anything. Using Kafka `ConsumerOffsetChecker`, I still see it is using only 2 partitions. The [Kafka][1] version I am using is 0.8.2.2. In version 0.8.1, there used to be a script called `kafka-add-partitions.sh`, which I guess might do the trick. However, I don&#39;t see any such script in 0.8.2.

- Is there any way of accomplishing this?

I did experiment with creating a whole new topic and for that one, it does seem to use 3 partitions as per the change in the `server.properties` file. However, for existing topics, it doesn&#39;t seem to care.


  [1]: https://kafka.apache.org/

Is it possible to add partitions to an existing topic in Kafka 0.8.2

I&#39;m working on rest api with spring boot. I need to log all requests with input params (with methods, eg. GET, POST, etc), request path, query string, corresponding class method of this request, also response of this action, both success and errors. For example:

successful request:

    http://example.com/api/users/1

Log should look something like this:

    {
       HttpStatus: 200,
       path: &quot;api/users/1&quot;,
       method: &quot;GET&quot;,
       clientIp: &quot;0.0.0.0&quot;,
       accessToken: &quot;XHGu6as5dajshdgau6i6asdjhgjhg&quot;,
       method: &quot;UsersController.getUser&quot;,
       arguments: {
         id: 1 
       },
       response: {
          user: {
            id: 1,
            username: &quot;user123&quot;,
            email: &quot;user123@example.com&quot;   
          }
       },
       exceptions: []       
    }


Or request with error:

    http://example.com/api/users/9999

Log should be something like this:

    {
       HttpStatus: 404,
       errorCode: 101,                 
       path: &quot;api/users/9999&quot;,
       method: &quot;GET&quot;,
       clientIp: &quot;0.0.0.0&quot;,
       accessToken: &quot;XHGu6as5dajshdgau6i6asdjhgjhg&quot;,
       method: &quot;UsersController.getUser&quot;,
       arguments: {
         id: 9999 
       },
       returns: {            
       },
       exceptions: [
         {
           exception: &quot;UserNotFoundException&quot;,
           message: &quot;User with id 9999 not found&quot;,
           exceptionId: &quot;adhaskldjaso98d7324kjh989&quot;,
           stacktrace: ...................    
       ]       
    }


I want Request/Response to be a single entity, with custom information related to this entity, both in successful and error cases.

What is best practice in spring to achieve this, may be with filters? if yes, can you provide concrete example?

I&#39;ve played with `@ControllerAdvice` and `@ExceptionHandler`, but as I mentioned, I need to handle all success and error requests in single place (and single log).


Spring Boot - How to log all requests and responses with exceptions in single place?

I have an activity with a `RecyclerView` and an `ImageView`. I am using the `RecyclerView` to show a list of images horizontally. When I click on an image in the `RecyclerView` the `ImageView` in the activity should show a bigger picture of the image. So far everything works fine.

Now there are two more `ImageButtons` in the activity: `imageButton_left` and `imageButton_right`. When I click on `imageButton_left`, the image in the `ImageView` should turn left and also, the thumbnail in the `RecyclerView` should reflect this change. Similar is the case with `imageButton_right`.

I am able to rotate the `ImageView`. But, how can I rotate the thumbnail in the `RecyclerView`? How can I get the `ViewHolder`&#39;s `ImageView`? 

Code:

Activity XML:


    &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.v7.widget.RecyclerView
            android:id=&quot;@+id/recyclerview&quot;
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_margin=&quot;10dp&quot; /&gt;
    
    
        &lt;LinearLayout
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_margin=&quot;10dp&quot;
            android:orientation=&quot;vertical&quot;&gt;
    
            &lt;ImageView
                android:id=&quot;@+id/original_image&quot;
                android:layout_width=&quot;200dp&quot;
                android:layout_height=&quot;200dp&quot;
                android:scaleType=&quot;fitXY&quot;
                android:src=&quot;@drawable/image_not_available_2&quot; /&gt;
    
            &lt;LinearLayout
                android:layout_width=&quot;match_parent&quot;
                android:layout_height=&quot;wrap_content&quot;
                android:layout_marginTop=&quot;10dp&quot;
                android:gravity=&quot;center_horizontal&quot;
                android:orientation=&quot;horizontal&quot;&gt;
    
    
                &lt;ImageButton
                    android:id=&quot;@+id/imageButton_left&quot;
                    android:layout_width=&quot;wrap_content&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:layout_marginRight=&quot;20dp&quot;
                    android:background=&quot;@drawable/rotate_left_icon&quot; /&gt;
    
                &lt;ImageButton
                    android:id=&quot;@+id/imageButton_right&quot;
                    android:layout_width=&quot;wrap_content&quot;
                    android:layout_height=&quot;wrap_content&quot;
                    android:background=&quot;@drawable/rotate_right_icon&quot; /&gt;
    
            &lt;/LinearLayout&gt;
        &lt;/LinearLayout&gt;
    &lt;/LinearLayout&gt;


My Activity Code:



    public class SecondActivity extends AppCompatActivity implements IRecyclerViewClickListener {
    
    
        RecyclerView mRecyclerView;
        LinearLayoutManager mLayoutManager;
        RecyclerViewAdapter mRecyclerViewAdapter;
        List&lt;String&gt; urls = new ArrayList&lt;String&gt;();
        ImageView mOriginalImageView;
        ImageButton mLeftRotate, mRightRotate;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_second);
            urls.clear();
    
            mRecyclerView = (RecyclerView) findViewById(R.id.recyclerview);
            mLayoutManager = new LinearLayoutManager(this, android.support.v7.widget.LinearLayoutManager.HORIZONTAL, false);
            mLayoutManager.setOrientation(android.support.v7.widget.LinearLayoutManager.HORIZONTAL);
            mRecyclerView.setLayoutManager(mLayoutManager);
            mRecyclerViewAdapter = new RecyclerViewAdapter(this, urls);
            mRecyclerView.setAdapter(mRecyclerViewAdapter);
    
            mOriginalImageView = (ImageView) findViewById(R.id.original_image);
            mLeftRotate = (ImageButton) findViewById(R.id.imageButton_left);
            mLeftRotate.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mOriginalImageView.setRotation(mOriginalImageView.getRotation() - 90);
                }
            });
    
    
            mRightRotate = (ImageButton) findViewById(R.id.imageButton_right);
            mRightRotate.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mOriginalImageView.setRotation(mOriginalImageView.getRotation() + 90);
                }
            });
    
            Intent intent = getIntent();
            if (intent != null) {
    
                String portfolio = intent.getStringExtra(&quot;portfolio&quot;);
    
                try {
    
                    JSONArray jsonArray = new JSONArray(portfolio);
    
                    for (int i = 0; i &lt; jsonArray.length(); i++) {
    
                        JSONObject jsonObject = jsonArray.getJSONObject(i);
    
                        String url = jsonObject.getString(&quot;url&quot;);
                        urls.add(url);
                    }
    
                    Log.d(Const.DEBUG, &quot;URLs: &quot; + urls.toString());
    
                    mRecyclerViewAdapter.notifyDataSetChanged();
    
                } catch (Exception e) {
                    e.printStackTrace();
                }
    
            }
    
        }
    
    
        @Override
        public void onItemClick(int position) {
            Picasso.with(this).load(urls.get(position)).into(mOriginalImageView);
        }
    }


My Custom Adapter for RecyclerView:

    public class RecyclerViewAdapter extends RecyclerView.Adapter&lt;RecyclerViewAdapter.ViewHolder&gt; {
    
        Context context;
        List&lt;String&gt; mUrls = new ArrayList&lt;String&gt;();
    
        IRecyclerViewClickListener mIRecyclerViewClickListener;
    
        public int position;
    
        public int getPosition() {
            return position;
        }
    
        public void setPosition(int position) {
            this.position = position;
        }
    
    
    
        public RecyclerViewAdapter(Context context, List&lt;String&gt; urls) {
            this.context = context;
            this.mUrls.clear();
            this.mUrls = urls;
    
            Log.d(Const.DEBUG, &quot;Urls Size: &quot; + urls.size());
            Log.d(Const.DEBUG, urls.toString());
    
            if (context instanceof IRecyclerViewClickListener)
                mIRecyclerViewClickListener = (IRecyclerViewClickListener) context;
            else
                Log.d(Const.DEBUG, &quot;Implement IRecyclerViewClickListener in Activity&quot;);
        }
    
        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(context).inflate(R.layout.item_horizontal_recyclerview, parent, false);
            ViewHolder holder = new ViewHolder(view);
            return holder;
        }
    
        @Override
        public void onBindViewHolder(ViewHolder holder, int position) {
            Picasso.with(context).load(mUrls.get(position)).into(holder.mImageView);
        }
    
        @Override
        public int getItemCount() {
            return mUrls.size();
        }
    
    
        public void rotateThumbnail() {
    
    
        }
    
        public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    
            public ImageView mImageView;
            public View v;
    
            public ViewHolder(View v) {
                super(v);
                v.setTag(getAdapterPosition());
                v.setOnClickListener(this);
                this.mImageView = (ImageView) v.findViewById(R.id.image);
            }
    
            @Override
            public void onClick(View v) {
                this.v = v;
                mIRecyclerViewClickListener.onItemClick(getAdapterPosition());
            }
        }
    
    
    }

RecyclerView - Get view at particular position

I want to concatenate an ArrayList with commas as separators. I found [this answer][1], stating it&#39;s possible to use `String.join` in Java.

When I try to use this however, Android Studio gives the following error:

&gt; Cannot resolve method &#39;join(java.lang.String, java.lang.String,
&gt; java.lang.String, java.lang.String)&#39;

Is there a good, concise alternative for Android Studio (instead of using a for loop)?


  [1]: https://stackoverflow.com/questions/1978933/a-quick-and-easy-way-to-join-array-elements-with-a-separator-the-opposite-of-sp

Alternative for String.join in Android?

Consider the following code:

    public Object getClone(Cloneable a) throws TotallyFooException {

        if (a == null) {
            throw new TotallyFooException();
        }
        else {
            try {
                return a.clone();
            } catch (CloneNotSupportedException e) {
                e.printStackTrace();
            }
        }
        //cant be reached, in for syntax
        return null;
    }

The `return null;` is necessary since an exception may be caught, however in such a case since we already checked if it was null (and lets assume we know the class we are calling supports cloning) so we know the try statement will never fail.

Is it bad practice to put in the extra return statement at the end just to satisfy the syntax and avoid compile errors (with a comment explaining it will not be reached), or is there a better way to code something like this so that the extra return statement is unnecessary?

Is having a return statement just to satisfy syntax bad practice?

In my application, I have to set a large icon for a notification.
LargeIcon must be a Bitmap, and my drawables are vector images (the new feature in Android, see [this link][1])
The problem is when I try to decode a resource that is a vector image, I get a null returned.

Here is the sample of code :

    if (BitmapFactory.decodeResource(arg0.getResources(), R.drawable.vector_menu_objectifs) == null)
			Log.d(&quot;ISNULL&quot;, &quot;NULL&quot;);
		else
			Log.d(&quot;ISNULL&quot;, &quot;NOT NULL&quot;);
In this sample, when I replace R.drawable.vector_menu_objectifs with a &quot;normal&quot; image, a png for exemple, the result is not null (I get the correct bitmap)
Is there something I&#39;m missing?


  [1]: http://developer.android.com/training/material/drawables.html#VectorDrawables

Getting Bitmap from vector drawable

I&#39;m using the fetch API in my react-native Android app to make requests to a local API. I usually query said API from react web apps at http://localhost:8163. 

I&#39;m testing my app on my physical device in debugger mode. I read somewhere that react-native can&#39;t query localhost the same way a web app can. Apparently you have to use `http://10.0.2.2:[PORT_NUMBER_HERE]/` which is an alias for `http://127.0.0.1:[PORT_NUMBER_HERE] according to the Android emulator docks. I&#39;m not sure if this is what I&#39;m supposed to be doing for testing on a physical device. 

My fetch code looks like the following:

    fetchToken() {
        fetch(&#39;http://10.0.2.2:8163/extension/auth&#39;, {
            method: &#39;GET&#39;,
            headers: {
                &#39;Accept&#39;: &#39;application/json&#39;,
                &#39;Content-type&#39;: &#39;application/json&#39;
            }
        })
        .then((response)) =&gt; console.log(&#39;successful fetchToken response: &#39;, response.json()))
        .catch((error) =&gt; console.log(&#39;fetchToken error: &#39;, error))
        .done();
    }

The request always hangs for a while and then reaches the `catch` block with the unhelpful error `TypeError: Network request failed(...)`. Checking the logs for my local API, they don&#39;t register the request at all.

So I have no idea if I&#39;m querying my local API correctly to get the resource that I want, and if I am, I don&#39;t know why the fetch is failing.

React Native Android Fetch failing on connection to local API

How can I change the colour of the error message that can be set to appear below the text field in a `TextInputLayout` (via `setError(...)` – [see error state here][1])?

It normally shows as a red colour, which I want to change. Which item names/keys should I use in my `styles.xml` file to target the colour?

Thanks in advance.

&lt;br&gt;
**Edit:**

Added `app:errorTextAppearance` key to my `TextInputLayout`:

    &lt;android.support.design.widget.TextInputLayout
            android:layout_width=&quot;match_parent&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:layout_marginTop=&quot;8dp&quot;
            android:id=&quot;@+id/welcome_current_week_container&quot;
            app:errorTextAppearance=&quot;@style/WelcomeErrorAppearance&quot;&gt;
            &lt;EditText
                ..../&gt;
        &lt;/android.support.design.widget.TextInputLayout&gt;
    &lt;/LinearLayout&gt;

and the error appearance *(set to green for testing)*:

    &lt;style name=&quot;WelcomeErrorAppearance&quot; parent=&quot;@android:style/TextAppearance&quot;&gt;
        &lt;item name=&quot;android:textColor&quot;&gt;@android:color/holo_green_dark&lt;/item&gt;
    &lt;/style&gt;

The result is that the hint as well as the error message is coloured *(screenshots from scaled Android Emulator)*:

*Regular (no error):*

[![Before Image][2]][2]

*Error state:*

[![After Image][3]][3]


**Edit 2/Outcome:**

When the error message appears, the hint above the field changes to the same colour as the error message, overriding hint colour – this is by design.


  [1]: https://material-design.storage.googleapis.com/publish/material_v_4/material_ext_publish/0Bzhp5Z4wHba3Z2tnU1NHUkg1NWc/components_textfields_single4.png
  [2]: http://i.stack.imgur.com/h9FZi.png
  [3]: http://i.stack.imgur.com/nSlso.png

How to set TextInputLayout error message colour?

**The error**

&gt;Error:Execution failed for task &#39;:app:transformClassesWithDexForDebug&#39;.
&gt; com.android.build.transform.api.TransformException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process &#39;command &#39;/usr/lib/jvm/java-8-oracle/bin/java&#39;&#39; finished with non-zero exit value 1

**My app gradle file:**

    apply plugin: &#39;com.android.application&#39;
    apply plugin: &#39;com.google.gms.google-services&#39;
    
    android {
        compileSdkVersion 23
        buildToolsVersion &quot;23.0.1&quot;
        defaultConfig {
            applicationId &#39;Hidden application ID&#39;
            minSdkVersion 15
            targetSdkVersion 23
            versionCode 1
            versionName &quot;1.0&quot;
            multiDexEnabled true
        }
        buildTypes {
            debug {
                minifyEnabled false
                proguardFiles getDefaultProguardFile(&#39;proguard-android.txt&#39;), &#39;proguard-rules.pro&#39;
            }
            release {
                minifyEnabled true
                proguardFiles getDefaultProguardFile(&#39;proguard-android.txt&#39;), &#39;proguard-rules.pro&#39;
            }
        }
        lintOptions {
            disable &#39;InvalidPackage&#39;
        }
        packagingOptions {
            exclude &#39;META-INF/services/javax.annotation.processing.Processor&#39;
        }
        productFlavors {
        }
    }
    
    repositories {
        mavenCentral()
    }
    
    dependencies {
        compile fileTree(include: [&#39;*.jar&#39;], dir: &#39;libs&#39;)
        compile &#39;com.android.support:multidex:1.0.1&#39;
        compile &#39;com.android.support:appcompat-v7:23.1.1&#39;
        compile &#39;com.android.support:design:23.1.1&#39;
        compile &#39;com.android.support:cardview-v7:23.1.1&#39;
        compile &#39;com.jakewharton:butterknife:7.0.1&#39;
        compile &#39;com.mcxiaoke.volley:library-aar:1.0.0&#39;
        compile &#39;com.google.android.gms:play-services:8.1.0&#39;
        compile &#39;com.facebook.android:facebook-android-sdk:4.7.0&#39;
        compile &#39;com.googlecode.libphonenumber:libphonenumber:7.2.1&#39;
        compile &#39;com.getbase:floatingactionbutton:1.10.1&#39;
        compile &#39;com.android.support:preference-v7:23.1.1&#39;
    }

While debugging, if I set minifyEnabled to true, then it compiles. However, then I cannot debug my application.

I checked this other question: [https://stackoverflow.com/questions/33369163/execution-failed-for-task-apptransformclasseswithdexfordebug-while-implement][1], but there is only one answer and implementing it does not resolve the issue unfortunately.

AFAIK, the error is caused due to addition of too many Gradle dependencies, but I may be wrong (I really hope to be wrong because all these packages are really important!). 

Please help me to resolve this error. Much thanks!

  [1]: https://stackoverflow.com/questions/33369163/execution-failed-for-task-apptransformclasseswithdexfordebug-while-implement

Error:Execution failed for task &#39;:app:transformClassesWithDexForDebug&#39;

I&#39;m able to connect to my phone using adb connect, and I can adb shell also.

But when I go to Run-&gt;Device Chooser, there are no devices there.

What should I do to connect my (connected) adb Android Studio?

When I plug it in through USB, it shows up on the list

How to debug in Android Studio using adb over WiFi

What causes the following error in the layout preview in Android Studio?

&gt; Rendering Problems The following classes could not be found:
&gt; -&#160;android.support.v7.internal.app.WindowDecorActionBar (Fix Build Path, Create Class)
&gt; Tip: Try to build the project. 

The following classes could not be found:&#160;android.support.v7.internal.app.WindowDecorActionBar

I just enabled `instant run` in my android studio project. (Followed the [instructions here][1])

My project contains `git` submodules and somehow these do not compile anymore.

**This is the error i get:**

&gt; Error:(8, 0) Cannot change dependencies of configuration
&gt; &#39;:libraries:my_library:classpath&#39; after it has been resolved.

Any idea what could be wrong there ? 

**Top level build.gradle:**

    buildscript {
    repositories {
        mavenCentral()
        jcenter()
        maven { url &#39;https://maven.fabric.io/public&#39; }
    }

    dependencies {
        classpath &#39;com.android.tools.build:gradle:2.0.0-alpha1&#39;
        classpath &#39;com.novoda:bintray-release:0.2.7&#39;
        classpath &#39;io.fabric.tools:gradle:1.+&#39;
    }}



**Module build.gradle:**

    apply plugin: &#39;android&#39;
    apply plugin: &#39;io.fabric&#39;
    
    android {
    
        defaultConfig {
           versionCode 4850
           versionName &#39;4850&#39;
           compileSdkVersion 23
           buildToolsVersion &#39;23.0.1&#39;
        }

        packagingOptions {
            exclude &#39;META-INF/LICENSE&#39;
            exclude &#39;META-INF/MANIFEST.MF&#39;
            exclude &#39;META-INF/NOTICE&#39;
        }

        compileOptions {
            sourceCompatibility JavaVersion.VERSION_1_7
            targetCompatibility JavaVersion.VERSION_1_7
        }

        useLibrary &#39;org.apache.http.legacy&#39;
    }

    repositories {
        mavenCentral()
        jcenter()
    }


    dependencies {
        [skip]
        compile project(&#39;:libraries:my_library:sdk&#39;)
    }

**Library build.gradle**

    apply plugin: &#39;com.android.library&#39;
    
    android {
        compileSdkVersion 23
        buildToolsVersion &#39;23.0.2&#39;
    
        defaultConfig {
            minSdkVersion 14
            targetSdkVersion 23
        }
    
        lintOptions {
            abortOnError false
        }
    }
    
    repositories {
        mavenCentral()
    }
    
    dependencies {
        compile fileTree(include: &#39;*.jar&#39;, dir: &#39;libs&#39;)
        compile &#39;com.android.support:support-v4:23.1.0&#39;
        compile &#39;com.android.support:appcompat-v7:23.1.0&#39;
    
        testCompile &#39;junit:junit:4.12&#39;

    }


  [1]: http://android-developers.blogspot.com/2015/11/android-studio-20-preview.html

Cannot change dependencies of configuration (after enabling instant run)

I have in my .gradle folder, a 2.4 folder which is the version of gradle.
I want to downgrade to 2.2.1, because I need to use Gradle plugin 1.0.1.
I already try to change by:

&gt; distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip

But this did not solve the issue and I&#39;m still with 2.4 version.

How can I solve this?

How to downgrade to older version of Gradle

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I am new to Intellij IDEA and Navigation Back(&lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Alt&lt;/kbd&gt;+&lt;kbd&gt;Left&lt;/kbd&gt;) and&lt;br&gt; Forward(&lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Alt&lt;/kbd&gt;+&lt;kbd&gt;Right&lt;/kbd&gt;) not working (tried in version 14 &amp; 15), &lt;br&gt;
but settings seems to be okey. How to make it work?

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/bmiog.jpg

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Having issues with the new LiveReload feature with Spring Boot devtools 1.3.  It doesn&#39;t reload on class changes.  I&#39;ve seen it demo&#39;d with IntelliJ @ Devoxx 2015. Is there some IDE setting I need to have enabled?  I&#39;m running via the IDE and not through Gradle.  I tried enabling &quot;Make project automatically&quot; which doesn&#39;t seem to help.

It seems to load correctly and is looking in the correct path

    2015-11-23 05:55:30.592 DEBUG 4700 --- [  restartedMain] o.s.boot.devtools.restart.Restarter      : Starting application com.myapp.Application with URLs [file:/E:/Projects/myapp/build/classes/main/, file:/E:/Projects/myapp/build/resources/main/]

My files

build.gradle

    buildscript {
        ext {
            springBootVersion = &#39;1.3.0.RELEASE&#39;
        }
        repositories {
            mavenCentral()
        }
        dependencies {
            classpath(&quot;org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}&quot;) 
        }
    }
    
    apply plugin: &#39;java&#39;
    apply plugin: &#39;eclipse-wtp&#39;
    apply plugin: &#39;idea&#39;
    apply plugin: &#39;spring-boot&#39; 
    apply plugin: &#39;war&#39;
    
    
    war {
        baseName = &#39;myapp&#39;
        version = &#39;0.0.1-SNAPSHOT&#39;
    }
    sourceCompatibility = 1.8
    targetCompatibility = 1.8
    
    repositories {
        mavenCentral()
        maven { url &quot;https://repo.spring.io/snapshot&quot; }
        maven { url &quot;https://repo.spring.io/milestone&quot; }
    }
    
    configurations {
        providedRuntime
    }
    
    dependencies {
        compile(&#39;org.springframework.boot:spring-boot-starter-actuator&#39;)
        compile(&#39;org.springframework.boot:spring-boot-devtools&#39;)
        compile(&#39;org.springframework.boot:spring-boot-starter-jdbc&#39;)
        compile(&#39;org.projectlombok:lombok&#39;)
        compile(&#39;org.springframework.boot:spring-boot-starter-web&#39;)
        compile(&#39;net.sourceforge.jtds:jtds:1.3.1&#39;);
        testCompile(&#39;org.springframework.boot:spring-boot-starter-test&#39;) 
    }
    
    dependencyManagement {
    	imports { 
    		mavenBom &quot;org.springframework.cloud:spring-cloud-starter-parent:Brixton.M3&quot; 
    	}
    }
    
    
    eclipse {
        classpath {
             containers.remove(&#39;org.eclipse.jdt.launching.JRE_CONTAINER&#39;)
             containers &#39;org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8&#39;
        }
    }
    
    task wrapper(type: Wrapper) {
        gradleVersion = &#39;2.7&#39;
    }
    


HelloWorldController

    @Controller
    public class HelloWorldController {

        @RequestMapping(&quot;/&quot;)
        @ResponseBody
        String home(){

            return &quot;Hello World test&quot;;
        }
    }

IntelliJ 15, SpringBoot devtools livereload not working

I have the following anonymous `Runnable` implementation.

    Runnable cronTask = new Runnable() {
           @Override
           public void run() {
              // do something
           }
    };

IntelliJ suggests that I replace it with a lambda expression. eg: 

    Runnable cronTask = () -&gt; {
         // multiple &quot;do something&quot; statements
    };

When using a single statement the syntax is:

    Runnable cronTask = () -&gt; doSomething();

What shortcut can I use to convert it?


How to change Runnable to lambda expression in Java with IntelliJ shortcut

**What is the equivalent of &lt;kbd&gt;CTRL&lt;/kbd&gt; + &lt;kbd&gt;SLASH&lt;/kbd&gt; on german keyboards?** 

I know that US-Layouts got that &lt;kbd&gt;/&lt;/kbd&gt; where the german &lt;kbd&gt; _ &lt;/kbd&gt; is, since I used an US-Layout for some time. But &lt;kbd&gt;CTRL&lt;/kbd&gt; + &lt;kbd&gt; _ &lt;/kbd&gt; just collapses a method.

Content Type	Original Author	Original Content on Stackoverflow
Question	Hamed Ghadirian	View Question on Stackoverflow
Solution 1 - Java	Hamed Ghadirian	View Answer on Stackoverflow
Solution 2 - Java	Erythrozyt	View Answer on Stackoverflow
Solution 3 - Java	Jacob Nordfalk	View Answer on Stackoverflow

How can I find all unused methods of my project in the Android Studio IDE?

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