In the advanced settings of a virtual device in Android Studio 1.0.2 AVD Manager, there is actually a checkbox that allows to enable keyboard input without editing the `config.ini` by hand.

Tools &amp;rarr; Android &amp;rarr; AVD Manager &amp;rarr; pencil icon (shown in picture) &amp;rarr; Show Advanced Settings (scroll to bottom) &amp;rarr; Enable Keyboard Input

![enter image description here][1]


  [1]: http://i.stack.imgur.com/GursM.png

Find the emulator&#39;s configuration in your home directory:

    //Located in:
    ~/.android/avd/&lt;The_Device_Name&gt;/config.ini

For example, on the Nexus 5 (created by Android Studio), it was:

    ~/.android/avd/Nexus5.avd/config.ini

Change the below setting to be:

    hw.keyboard=yes

Open and Navigate to Tools → Android → AVD Manager → Edit -&gt; pencil icon) 

[![enter image description here][1]][1] 


Click on Show Advanced settings and scroll down and you can see the option 
Enable Keyboard input (example second image) Check that box and Click on Finish.

[![enter image description here][2]][2]


  [1]: http://i.stack.imgur.com/Aeo3w.png
  [2]: http://i.stack.imgur.com/XjVS0.png

**UPDATE:**

Change `hw.keyboard = yes`.

And make the file `config.ini` Read-only:

1.Right-click on the file open its settings.

2.Make every options on the permissions tab into Read-only(refer screenshot)

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/sW9Ra.png

Trust me this will work it happens because this file gets rewritten,when we lock it out the bug disappears.

In Bjarne Stroustrup&#39;s *[The C++ Programming Language][1]* 4th edition section `36.3.6` *STL-like Operations* the following code is used as an example of [chaining](http://en.wikipedia.org/wiki/Method_chaining):

    void f2()
    {
        std::string s = &quot;but I have heard it works even if you don&#39;t believe in it&quot; ;
        s.replace(0, 4, &quot;&quot; ).replace( s.find( &quot;even&quot; ), 4, &quot;only&quot; )
            .replace( s.find( &quot; don&#39;t&quot; ), 6, &quot;&quot; );

        assert( s == &quot;I have heard it works only if you believe in it&quot; ) ;
    }

The assert fails in `gcc` (*[see it live](http://coliru.stacked-crooked.com/a/d3d81ff98cab2f5c)*) and `Visual Studio` (*[see it live](http://rextester.com/IFNX5880)*), but it does not fail when using [Clang][2] (*[see it live](http://coliru.stacked-crooked.com/a/e6facaa9f18e252f)*).

Why am I getting different results? Are any of these compilers incorrectly evaluating the chaining expression or does this code exhibit some form of [unspecified](http://en.wikipedia.org/wiki/Unspecified_behavior) or [undefined behavior](http://en.wikipedia.org/wiki/Undefined_behavior)?

  [1]: https://en.wikipedia.org/wiki/The_C%2B%2B_Programming_Language
  [2]: http://en.wikipedia.org/wiki/Clang


Does this code from &quot;The C++ Programming Language&quot; 4th edition section 36.3.6 have well-defined behavior?

    library(ggplot2)
    library(scales)
    library(reshape2)  

    Rdates &lt;- c(&quot;2007-01-31&quot;,&quot;2007-02-28&quot;,&quot;2007-03-30&quot;,&quot;2007-04-30&quot;,&quot;2007-05-31&quot;,&quot;2007-06-29&quot;,&quot;2007-07-31&quot;,&quot;2007-08-31&quot;,&quot;2007-09-28&quot;,&quot;2007-10-31&quot;)
    Rdates &lt;- as.Date(Rdates)
    Cnames &lt;- c(&quot;Column 1 Really Long&quot;,&quot;Column 2 Really Long&quot;,&quot;Column 3 Really Long&quot;,&quot;Column 4 Really Long&quot;,&quot;Column 5 Really Long&quot;,&quot;Column 6 Really Long&quot;,&quot;Column 7 Really Long&quot;,&quot;Column 8 Really Long&quot;,&quot;Column 9 Really Long&quot;,&quot;Column 10 Really Long&quot;)
    MAINDF &lt;- data.frame(replicate(10,runif(10,-0.03,0.03)))
    rownames(MAINDF) &lt;- Rdates
    colnames(MAINDF) &lt;- Cnames
    CUSTOMpalette &lt;- c(&quot;#1a2ffa&quot;, &quot;#0d177d&quot;, &quot;#1a9ffa&quot;, &quot;#fa751a&quot;, &quot;#4b8e12&quot;, &quot;#6fd21b&quot;, &quot;#fae51a&quot;, &quot;#c3b104&quot;, &quot;#f5df05&quot;, &quot;#dcc805&quot;)
    MAINDF[,&quot;dates&quot;] &lt;- Rdates
    
    MAINDF &lt;- melt(MAINDF,id.vars=&quot;dates&quot;)
    
    gg &lt;- ggplot(MAINDF, aes(x = dates, y = value, fill = variable))
    gg &lt;- gg + geom_bar(stat = &quot;identity&quot;)
    gg &lt;- gg + scale_x_date(breaks = &quot;3 months&quot;, labels=date_format(&quot;%b%y&quot;),limits=c(min(as.Date(MAINDF$dates)),max(as.Date(MAINDF$dates))))
    gg &lt;- gg + theme(
      axis.text.x= element_text(color=&quot;black&quot;,angle=45, size=10, vjust=0.5),
      axis.text.y= element_text(color=&quot;black&quot;, size=12, vjust=0.5),
      axis.title.y = element_text(color=&quot;black&quot;,size=12, vjust=0.5),
      plot.title = element_text(color=&quot;black&quot;,face=&quot;bold&quot;,size=14, hjust=0.5,vjust=1),
      panel.background = element_blank(),
      panel.border = element_rect(linetype = &quot;solid&quot;, colour = &quot;black&quot;,fill=NA),
      legend.position=&quot;bottom&quot;,
      legend.title = element_blank(),
      legend.key = element_rect(fill=&quot;white&quot;), legend.background = element_rect(fill=NA)
    )
    gg &lt;- gg + xlab(&quot;&quot;) + ylab(&quot;Monthly Returns&quot;) 
    gg &lt;- gg + ggtitle(&quot;Contribution by Strategy&quot;)
    gg &lt;- gg + scale_y_continuous(labels = percent_format())
    gg &lt;- gg + scale_fill_manual(values=CUSTOMpalette)
    gg

Currently have a ggplot2 stacked bar graph setup. Everything works properly now except I am having an issue with the legend. I have put it on the bottom but there are 10 items so some are cutoff (doesnt fit). I tried  `guides(fill=guide_legend(nrow=2))` but this puts the labels in a different order (I want to get the first 5 across then the last 5 below. Any suggestions?

Legend on bottom, two rows wrapped in ggplot2 in r

I&#39;m not sure what changed but the physical keyboard from my computer no longer works for the emulator (running kitkat in Nexus 5, x86). When i look in AVD at the device&#39;s advanced settings, there&#39;s nothing for a hardware keyboard. Where is this setting?

How enable physical keyboard on Emulator in Android Studio? (Used to work)

<p>I'm not sure what changed but the physical keyboard from my computer no longer works for the emulator (running kitkat in Nexus 5, x86). When i look in AVD at the device's advanced settings, there's nothing for a hardware keyboard. Where is this setting?</p>


So my sdk goes from 15 to 21 and when I call `setBackgroundDrawable()`, Android Studio tells me that it&#39;s deprecated.

I thought of going around it using:

    int sdk = android.os.Build.VERSION.SDK_INT;
    
    if(sdk &lt; android.os.Build.VERSION_CODES.JELLY_BEAN) {
        layout.setBackgroundDrawable(getResources().getDrawable(R.drawable.img_wstat_tstorm));
    } else {
        layout.setBackground(getResources().getDrawable(R.drawable.img_wstat_tstorm));
    }

But then, I get an error at &quot;setBackground()&quot;.

So, how would you deal with it?

setBackgroundDrawable() deprecated

Is there someone who had experience with this error?

    java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file &quot;/data/app/org.swig.simple-2/base.apk&quot;],nativeLibraryDirectories=[/vendor/lib, /system/lib]]] couldn&#39;t find &quot;liborg.swig.simple.example.so&quot;

Error occurs when I load library by this way. 


    static {
        System.loadLibrary(&quot;example&quot;);
    }

I&#39;m sure &#39;example&#39; class is exist in the current folder.

java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader

I am using `RecyclerView` for the first time. Everything is working fine except that there is no animation on item removal even though the animation on item addition works just fine.

I have not set any custom item animator, but according to the [documentation][1]:

&gt; Animations for adding and removing items are enabled by default in `RecyclerView`.

So the animations on removal should work.

I would like to have the default animation on removal, but can&#39;t get that to work.

This is how I setup the RecyclerView:

    private void setupRecyclerView() {
      mRecyclerView = (RecyclerView) mRootView.findViewById(R.id.recycler_view);
      mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
      View emptyView = mRootView.findViewById(R.id.empty_view);
      mAdapter = new RoutineAdapter(getActivity(), mRoutineItems, emptyView);
      mRecyclerView.setAdapter(mAdapter);
    }

This is my adapter:

    private class RoutineAdapter
          extends RecyclerView.Adapter&lt;RoutineAdapter.ViewHolder&gt; {
    
    private final Context mContext;
    private List&lt;RoutineItem&gt; mData;
    private View mEmptyView;
    
        public RoutineAdapter(Context context, List&lt;RoutineItem&gt; data, View emptyView) {
          mContext = context;
          mData = data;
          mEmptyView = emptyView;
          setEmptyViewVisibility();
        }
    
        public void add(RoutineItem routineItem, int position) {
          mData.add(position, routineItem);
          setEmptyViewVisibility();
          notifyItemInserted(position);
        }
    
        public void remove(int position){
          mData.remove(position);
          setEmptyViewVisibility();
          notifyItemRemoved(position);
        }
    
        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
          final View view = LayoutInflater.from(mContext).inflate(
              R.layout.fragment_routines_list_item, parent, false);
          return new ViewHolder(view);
        }
    
        @Override
        public void onBindViewHolder(ViewHolder holder, final int position) {
          final RoutineItem routineItem = getItem(position);
          holder.circle.setBackgroundResource(
              colorNumberToDrawableResource(routineItem.colorNumber));
          holder.initial.setText(routineItem.routineName.substring(0, 1));
          holder.routineName.setText(routineItem.routineName);
          holder.lastTimeDone.setText(routineItem.lastTimeDoneText);
          if (routineItem.isSelected) {
            holder.itemView.setBackgroundColor(
                getResources().getColor(R.color.background_item_selected));
          } else {
            holder.itemView.setBackgroundResource(
                R.drawable.darker_background_on_pressed);
          }
          holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
              mPresenter.onRoutineClicked(routineItem.routineName);
            }
          });
          holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
              mPresenter.onRoutineLongClicked(routineItem.routineName);
              return true;
            }
          });
        }
    
        @Override
        public int getItemCount() {
          return mData.size();
        }
    
        public RoutineItem getItem(int position) {
          return mData.get(position);
        }
    
        private void setEmptyViewVisibility() {
          if (getItemCount() == 0) {
            mEmptyView.setVisibility(View.VISIBLE);
          } else {
            mEmptyView.setVisibility(View.GONE);
          }
        }
    
        class ViewHolder extends RecyclerView.ViewHolder {
          public final View circle;
          public final TextView initial;
          public final TextView routineName;
          public final TextView lastTimeDone;
    
          public ViewHolder(View view) {
            super(view);
            circle = view.findViewById(R.id.circle);
            initial = (TextView) view.findViewById(R.id.initial);
            routineName = (TextView) view.findViewById(R.id.routine_name);
            lastTimeDone = (TextView) view.findViewById(R.id.last_time_done);
          }
        }
    }



Fragment_routines_list_item.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:minHeight=&quot;@dimen/standard_list_item_height&quot;
      android:paddingBottom=&quot;8dp&quot;
      android:background=&quot;@drawable/darker_background_on_pressed&quot;
      android:clickable=&quot;true&quot;&gt;
        ......
    &lt;/RelativeLayout&gt;


What am I doing wrong that causes the default removal animation to not work?

  [1]: https://developer.android.com/training/material/lists-cards.html

No animation on item removal on RecyclerView

I have created RecyclerView example basing on [Creating Lists and Cards][1] guide. My adapter have a pattern implementation only for inflate the layout. 

**The problem is the poor scrolling performance.** This in a RecycleView with only 8 items.

In some tests I verified that in Android L this problem does not occurs. But in the KitKat version the decreasing of performance is evident.

  [1]: https://developer.android.com/training/material/lists-cards.html

Android RecyclerView Scrolling Performance

I have this code:

	Notification notif;

	// Build notification
	Notification.Builder notifBuilder = new Notification.Builder(context);
	notifBuilder.setContentIntent(pendingIntent);
	notifBuilder.setContentTitle(title);
	notifBuilder.setSmallIcon(icon_resId);
	notifBuilder.setContentText(ne.getCaption());
	notifBuilder.setDefaults(Notification.DEFAULT_ALL);
	notifBuilder.setAutoCancel(autocancel);
	notifBuilder.setWhen(System.currentTimeMillis());
	notif = notifBuilder.build();

and works fine in Android 4.4.

However, in Android 5.0 the icon showed in status bar is a white square. The icon showed in the new &quot;notification body&quot;, that appears when device is locked, is correct.

In http://developer.android.com/reference/android/app/Notification.Builder.html, I don&#39;t see anything new about notification icons in API Level 21


Why do icons set with Notification.Builder.setSmallIcon in Android Lollipop show as a white square?

I had installed Android Studio 1.0 RC 2. I have 4GB of RAM installed, but after starting Android Studio and launching Android Emulator, more than 90% of physical memory has been used by only these two. Is there is any way to reduce this memory use? Due to this memory issue, I can&#39;t open other applications at the same time.
![enter image description here][1]


  [1]: http://i.stack.imgur.com/Apkhr.png

Android studio takes too much memory

    /Library/Java/JavaVirtualMachines/jdk1.7.0_60.jdk/Contents/Home/bin/java &quot;- com.intellij.rt.execution.application.AppMain org.gradle.launcher.GradleMain --build-file /Users/Tom/Documents/Git_open_sources/android-material-drawer-template/app/build.gradle
    
    FAILURE: Build failed with an exception.
    
    * Where:
    Build file &#39;/Users/Tom/Documents/Git_open_sources/android-material-drawer-template/app/build.gradle&#39; line: 16
    
    * What went wrong:
    A problem occurred evaluating project &#39;:app&#39;.
    &gt; Could not find method runProguard() for arguments [false] on BuildType_Decorated{name=release, debuggable=false, testCoverageEnabled=false, jniDebuggable=false, pseudoLocalesEnabled=false, renderscriptDebuggable=false, renderscriptOptimLevel=3, applicationIdSuffix=null, versionNameSuffix=null, minifyEnabled=false, zipAlignEnabled=true, signingConfig=null, embedMicroApp=true, mBuildConfigFields={}, mResValues={}, mProguardFiles=[], mConsumerProguardFiles=[], mManifestPlaceholders={}}.
    
    * Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
    
    BUILD FAILED
    
    Total time: 6.741 secs
    
    Process finished with exit code 1

---




    apply plugin: &#39;com.android.application&#39;

    android {
    compileSdkVersion 21
    buildToolsVersion &quot;21.1.0&quot;

    defaultConfig {
        applicationId &quot;com.poliveira.apps.materialtests&quot;
        minSdkVersion 11
        targetSdkVersion 21
        versionCode 1
        versionName &quot;1.0&quot;
    }
    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile(&#39;proguard-android.txt&#39;), &#39;proguard-rules.pro&#39;
        }
    }
    }

    dependencies {
    compile fileTree(dir: &#39;libs&#39;, include: [&#39;*.jar&#39;])
    compile &#39;com.android.support:support-v4:21.0.0&#39;
    //noinspection GradleDependency
    compile &quot;com.android.support:appcompat-v7:21.0.0&quot;
    compile &#39;com.android.support:recyclerview-v7:21.0.0&#39;
    }    



Android Studio Could not find method runProguard() for arguments?

I updated  0.5 to 0.8.14 version of android studio ,  but now  studio doesn&#39;t see genymotion , what I must do now ? Thanks for all . 


Edit :I solved the problem by updating genymotion too 

Android Studio doesn&#39;t see genymotion

Does anyone know what this means? When I click the &quot;run&quot; button on my simulator I get this message.

&gt; Throwable: Unable to locate adb within SDK

I am running the latest version, `0.8.14`.


Error:Unable to locate adb within SDK in Android Studio

I am unable to start my Android Studio for Android development on Mac OS (10.10.1 - Yosemite)

Android Studio was unable to find a valid Jvm (Related to MAC OS)

I just recently downloaded the Android SDK.  
Downloading all the packages in the &quot;SDK Manager&quot; will take way too much time. So I&#39;m wondering whether I should deselect all the platforms except the latest one.  
Do I need all the platforms or which ones do I need?

Android SDK Manager - Do you need to install all Android platforms?

I decided to try Android Studio 2.0 having used Eclipse in the past but I&#39;m having considerable difficulty getting the AVD to load correctly. I&#39;ve done quite a bit of googling and research into the problem, both here on SO and Google.So far nothing has worked.

The emulator simply hangs on the android load-up screen ever time I try to run it. I&#39;ve seen it advised to use Genymotion but I would first prefer to resolve the issue natively in Android Studio to feel confident going forward using the IDE for building projects.

Here&#39;s what I&#39;ve tried:

 - Complete reinstall of Android, SDK and SDK Tools
   
   
 - Install and configure of Intel x86 accelerator

   
   

 - Lowered the RAM amount to 512 in AVD settings

   
   

 - Multiple attempts at deleting and recreating AVD&#39;s

   
  

 - Tried creating different AVD phone models(Nexus One,Nexus 5x etc.)

   
   

 - Resetting ADB in AVD Monitor Tool

   
   

 - Starting ADB server from terminal

   
   

 - Restarting Android Studio multiple times after changes

   
   

 - Running SDK/SDK Tools updates several times

   
   

 - Made sure the SDK path is correct

These are the majority of the &quot;solutions&quot; I found either on other similar SO questions or by googling none of which has resolved the problem. 

When I run the emulator currently it displays the following in the run window:

    /Users/&lt;username&gt;/Library/Android/sdk/tools/emulator -netdelay none -netspeed full -avd Nexus_5X_API_23
    Warning: requested ram_size 1024M too big, reduced to 512M
    emulator: WARNING: Increasing RAM size to 1024MB
    emulator: WARNING: VM heap size set below hardware specified minimum of 228MB
    emulator: WARNING: Setting VM heap size to 256MB
    Hax is enabled
    Hax ram_size 0x20000000
    HAX is working and emulator runs in fast virt mode.
    console on port 5554, ADB on port 5555 

The emulator shows up fine in the Android AVD Monitor devices pane and even appears to go through the entire booting process on the emulator screen itself but never gets to the Android home screen.
Also, Logcat seems to be looping continuously through dozens of errors and warnings, which don&#39;t offer any clear indication of what the issue might be or direction of how to resolve it.

I feel like I&#39;ve exhausted every idea and not sure how to move forward.Just for the record, I am running El Capitan 10.9.2 with a 2.4gh Intel Core 2 Duo and 4gb ram.It&#39;s not the fastest machine for sure but should be capable of running Android Studio and the emulator. 

Any help or guidance resolving this problem is gratefully appreciated!

AVD Emulator stuck on loading screen in Android Studio

After googling quite a bit I am unable to find the answer to this question. Is google play store officially support in avd emulators. 

I know it was once stopped , then I hear that it was brought back after specific version of android. I am using avd android version 4.4.3 (api 19) google app . I dont see a google play store app there. Am I suppose to expect it? Or is there an official apk for google play store that can be installed on the avd officially?

Is Google Play Store supported in avd emulators?

[![enter image description here][1]][1]


[![enter image description here][2]][2]

I want to remove the api 16 of jelly bean but there is not remove button how can I do that. image file is very big size file so I need don&#39;t many system image file


  [1]: https://i.stack.imgur.com/VShBK.png
  [2]: https://i.stack.imgur.com/Y7NYC.png

How do I remove an image-system for avd file in Android Studio?

I built an android app using React Native, it got built successfully but when I run the app in my Android Virtual Device it shows up a full red screen with the following error:

[![enter image description here][1]][1]


**I have not done native app development ever before neither do I have any knowledge of Java so I have no idea what this error means and how to fix this.**


  [1]: https://i.stack.imgur.com/QNv1G.png

Content Type	Original Author	Original Content on Stackoverflow
Question	Don Rhummy	View Question on Stackoverflow
Solution 1 - Android	carine	View Answer on Stackoverflow
Solution 2 - Android	Don Rhummy	View Answer on Stackoverflow
Solution 3 - Android	Parvathy Nair	View Answer on Stackoverflow
Solution 4 - Android	Amal p	View Answer on Stackoverflow

How enable physical keyboard on Emulator in Android Studio? (Used to work)

Android Problem Overview

Android Solutions

Solution 1 - Android

Solution 2 - Android

Solution 3 - Android

Solution 4 - Android

Legend on bottom, two rows wrapped in ggplot2 in r

Does this code from "The C++ Programming Language" 4th edition section 36.3.6 have well-defined behavior?

Attributions