title: Android Error inflating class android.support.constraint.ConstraintLayout
body: <p>When I want to start my application I get error "application has stopped working.Why do I get this error when I start app?</p>
  
  <blockquote>
    <p>--------- beginning of crash 04-12 18:28:12.344 8646-8646/com.example.audiophileradio.audiophileradio
    E/AndroidRuntime: FATAL EXCEPTION: main
                                                                                               Process: com.example.audiophileradio.audiophileradio, PID: 8646
                                                                                               java.lang.RuntimeException: Unable to start activity
    ComponentInfo{com.example.audiophileradio.audiophileradio/com.example.audiophileradio.audiophileradio.MainActivity}:
    android.view.InflateException: Binary XML file line #2: Error
    inflating class android.support.constraint.ConstraintLayout
                                                                                                   at
    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
                                                                                                   at
    android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
                                                                                                   at android.app.ActivityThread.access$800(ActivityThread.java:144)
                                                                                                   at
    android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
                                                                                                   at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                                                   at android.os.Looper.loop(Looper.java:135)
                                                                                                   at android.app.ActivityThread.main(ActivityThread.java:5221)
                                                                                                   at java.lang.reflect.Method.invoke(Native Method)
                                                                                                   at java.lang.reflect.Method.invoke(Method.java:372)
                                                                                                   at
    com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
                                                                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
                                                                                                Caused by: android.view.InflateException: Binary XML file line #2:
    Error inflating class android.support.constraint.ConstraintLayout
                                                                                                   at android.view.LayoutInflater.createView(LayoutInflater.java:633)
                                                                                                   at
    android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
                                                                                                   at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
                                                                                                   at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
                                                                                                   at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
                                                                                                   at
    android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:292)
                                                                                                   at
    android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
                                                                                                   at
    com.example.audiophileradio.audiophileradio.MainActivity.onCreate(MainActivity.java:52)
                                                                                                   at android.app.Activity.performCreate(Activity.java:5933)
                                                                                                   at
    android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
                                                                                                   at
    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
                                                                                                   at
    android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
                                                                                                   at android.app.ActivityThread.access$800(ActivityThread.java:144) 
                                                                                                   at
    android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
                                                                                                   at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                                                   at android.os.Looper.loop(Looper.java:135) 
                                                                                                   at android.app.ActivityThread.main(ActivityThread.java:5221) 
                                                                                                   at java.lang.reflect.Method.invoke(Native Method) 
                                                                                                   at java.lang.reflect.Method.invoke(Method.java:372) 
                                                                                                   at
    com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
                                                                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
                                                                                                Caused by: java.lang.reflect.InvocationTargetException
                                                                                                   at java.lang.reflect.Constructor.newInstance(Native Method)
                                                                                                   at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
                                                                                                   at android.view.LayoutInflater.createView(LayoutInflater.java:607)
                                                                                                   at
    android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743) 
                                                                                                   at android.view.LayoutInflater.inflate(LayoutInflater.java:482) 
                                                                                                   at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
                                                                                                   at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
                                                                                                   at
    android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:292) 
                                                                                                   at
    android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
                                                                                                   at
    com.example.audiophileradio.audiophileradio.MainActivity.onCreate(MainActivity.java:52) 
                                                                                                   at android.app.Activity.performCreate(Activity.java:5933) 
                                                                                                   at
    android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) 
                                                                                                   at
    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) 
                                                                                                   at
    android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
                                                                                                   at android.app.ActivityThread.access$800(ActivityThread.java:144) 
                                                                                                   at
    android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
                                                                                                   at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                                                   at android.os.Looper.loop(Looper.java:135) 
                                                                                                   at android.app.ActivityThread.main(ActivityThread.java:5221) 
                                                                                                   at java.lang.reflect.Method.invoke(Native Method) 
                                                                                                   at java.lang.reflect.Method.invoke(Method.java:372) 
                                                                                                   at
    com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
                                                                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
                                                                                                Caused by: java.lang.OutOfMemoryError: Failed to allocate a 147456012
    byte allocation with 1048480 free bytes and 94MB until OOM
                                                                                                   at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
                                                                                                   at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
                                                                                                   at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)
                                                                                                   at
    android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
                                                                                                   at
    android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:973)
                                                                                                   at
    android.content.res.Resources.loadDrawableForCookie(Resources.java:2423)
                                                                                                   at android.content.res.Resources.loadDrawable(Resources.java:2330)
                                                                                                   at android.content.res.TypedArray.getDrawable(TypedArray.java:749)
                                                                                                   at android.view.View.(View.java:3730)
                                                                                                   at android.view.ViewGroup.(ViewGroup.java:491)
                                                                                                   at android.view.ViewGroup.(ViewGroup.java:487)
                                                                                                   at android.view.ViewGroup.(ViewGroup.java:483)
                                                                                                   at
    android.support.constraint.ConstraintLayout.(ConstraintLayout.java:419)
                                                                                                   at java.lang.reflect.Constructor.newInstance(Native Method) 
                                                                                                   at java.lang.reflect.Constructor.newInstance(Constructor.java:288) 
                                                                                                   at android.view.LayoutInflater.createView(LayoutInflater.java:607) 
                                                                                                   at
    android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743) 
                                                                                                   at android.view.LayoutInflater.inflate(LayoutInflater.java:482) 
                                                                                                   at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
                                                                                                   at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
                                                                                                   at
    android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:292) 
                                                                                                   at
    android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
                                                                                                   at
    com.example.audiophileradio.audiophileradio.MainActivity.onCreate(MainActivity.java:52) 
                                                                                                   at android.app.Activity.performCreate(Activity.java:5933) 
                                                                                                   at
    android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) 
                                                                                                   at
    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) 
                                                                                                   at
    android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
                                                                                                   at android.app.ActivityThread.access$800(ActivityThread.java:144) 
                                                                                                   at
    android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
                                                                                                   at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                                                   at android.os.Looper.loop(Looper.java:135) 
                                                                                                   at android.app.ActivityThread.main(ActivityThread.java:5221) 
                                                                                                   at java.lang.reflect.Method.invoke(Native Method) 
                                                                                                   at java.lang.reflect.Method.invoke(Method.java:372) 
                                                                                                   at
    com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
                                                                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)</p>
  </blockquote>
  
  <pre><code>public class MainActivity extends AppCompatActivity
  {
  
      private ImageButton buttonPlay,buttonStop,buttonPause;
      private String STREAM_URL = "http://178.149.86.162:8000/";
      private MediaPlayer mPlayer;
      Intent playbackServiceIntent;
  
      private SeekBar volumeSeekbar = null;
      private AudioManager audioManager = null;
  
      private TextView volume;
      Context context;
      NotificationManager notificationManager;
  
      @Override
      protected void onCreate(Bundle savedInstanceState)
      {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          buttonPlay = (ImageButton) findViewById(R.id.buttonPlay);
  
          mPlayer = new MediaPlayer();
  
          initControls();
  
          buttonPlay.setTag(1);
          buttonPlay.setImageResource(R.drawable.stop);
          buttonPlay.setOnClickListener(new OnClickListener()
          {
              @Override
              public void onClick(View view)
              {
                  if (Integer.parseInt(buttonPlay.getTag().toString()) == 1)
                  {
                      buttonPlay.setImageResource(R.drawable.play);
                      view.setTag(0);
                      startService(playbackServiceIntent);
                      Log.e("Play", "onPlay");
                      Toast.makeText(MainActivity.this, "Play", Toast.LENGTH_SHORT).show();
                      showNotification();
                  }
                  else
                  {
                      buttonPlay.setImageResource(R.drawable.stop);
                      view.setTag(1);
                      mPlayer.stop();
                      stopService(playbackServiceIntent);
                      Log.e("Stop", "onPlay");
                      Toast.makeText(MainActivity.this, "Stop", Toast.LENGTH_SHORT).show();
                  }
  
              }
          });
  
          volume = (TextView) findViewById(R.id.textView);
          volume.setText("Volume :" + volumeSeekbar.getProgress());
  
          playbackServiceIntent = new Intent(this, BackgroundService.class);
      }
  
      private void startService()
      {
          startService(new Intent(MainActivity.this,BackgroundService.class));
      }
      private void stopService()
      {
          stopService(new Intent(MainActivity.this,BackgroundService.class));
      }
  
      private void initControls()
      {
          try
          {
              volumeSeekbar = (SeekBar)findViewById(R.id.seekBar);
              audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
              volumeSeekbar.setMax(audioManager
                      .getStreamMaxVolume(AudioManager.STREAM_MUSIC));
              volumeSeekbar.setProgress(audioManager
                      .getStreamVolume(AudioManager.STREAM_MUSIC));
  
              volumeSeekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener()
              {
                  @Override
                  public void onStopTrackingTouch(SeekBar arg0)
                  {
                  }
  
                  @Override
                  public void onStartTrackingTouch(SeekBar arg0)
                  {
                  }
  
                  @Override
                  public void onProgressChanged(SeekBar arg0, int progress, boolean arg2)
                  {
                      audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,
                              progress, 0);
  
                      volume.setText("Volume : " + progress + "%");
                  }
              });
          }
          catch (Exception e)
          {
              e.printStackTrace();
          }
      }
  
      @Override
      public void onBackPressed()
      {
          new AlertDialog.Builder(this)
                  .setIcon(android.R.drawable.ic_dialog_alert)
                  .setTitle("Audiophile Radio")
                  .setMessage("Are you sure you want to close this activity?")
                  .setPositiveButton("Yes", new DialogInterface.OnClickListener()
                  {
                      @Override
                      public void onClick(DialogInterface dialog, int which)
                      {
                          finish();
                      }
  
                  })
                  .setNegativeButton("No", null)
                  .show();
      }
  
      private void showNotification()
      {
          Intent intent = new Intent();
          PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this,0,intent,0);
          Notification builder = new Notification.Builder(MainActivity.this)
                  .setTicker("Audiophile Radio")
                  .setContentTitle("Audiophile Radio")
                  .setContentText("DeeJay Z1an")
                  .setSmallIcon(R.drawable.play)
                  .addAction(R.drawable.play,"play",pendingIntent)
                  .setContentIntent(pendingIntent).getNotification();
  
          builder.flags=Notification.FLAG_AUTO_CANCEL;
          notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
          notificationManager.notify(0,builder);
      }
  
      public static void cancelNotification(Context ctx, int notifyId) {
          String ns = Context.NOTIFICATION_SERVICE;
          NotificationManager nMgr = (NotificationManager) ctx.getSystemService(ns);
          nMgr.cancel(notifyId);
      }
  }
  
  
  
  public class BackgroundService extends Service implements OnCompletionListener
  {
      MediaPlayer mediaPlayer;
      private String STREAM_URL = "http://178.149.86.162:8000/";
  
      @Override
      public IBinder onBind(Intent intent) {
          return null;
      }
  
      @Override
      public void onCreate()
      {
          mediaPlayer = new MediaPlayer();
          try
          {
              mediaPlayer.setDataSource(STREAM_URL);
          } catch (IOException e)
          {
              e.printStackTrace();
          }
  
          mediaPlayer.setOnCompletionListener(this);
      }
  
      @Override
      public int onStartCommand(Intent intent, int flags, int startId)
      {
  
          if (!mediaPlayer.isPlaying())
          {
              try
              {
                  mediaPlayer.reset();
                  mediaPlayer.setDataSource(STREAM_URL);
                  mediaPlayer.prepareAsync();
  
                  mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener()
                  {
                      @Override
                      public void onPrepared(MediaPlayer mp)
                      {
                          mediaPlayer.start();
                      }
                  });
              } catch (IOException e)
              {
                  e.printStackTrace();
              }
  
          }
  
          return START_STICKY;
      }
  
      public void onDestroy() {
          if (mediaPlayer.isPlaying()) {
              mediaPlayer.stop();
          }
          mediaPlayer.release();
      }
  
      public void onCompletion(MediaPlayer _mediaPlayer) {
          stopSelf();
      }
  
  
      @Override
      public boolean onUnbind(Intent intent)
      {
          return super.onUnbind(intent);
      }
  }
  </code></pre>