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PONullPointerException at sendBroadcast() from Service to Activity
 

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  1. PONullPointerException at sendBroadcast() from Service to Activity
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    <p>I have a <code>Service</code> class and an main <code>Acitivity</code> class which is supposed to receive broadcasts from the Service class with method sendBroadcast.</p> <p>It crashes when running the method <code>sendBroadcast</code> from my <code>Service</code> class.</p> <p>here is part of my Service class (<strong>EDITED</strong>):</p> <pre><code> public static final int STATE_CONNECTING = 1; public static final String BT_CONNECTING = "com.android.mypackage.action.BTService.BT_CONNECTING"; private final IBinder mBinder = new LocalBinder(); public class LocalBinder extends Binder() { BTService getService() { return BTService.this; } } @Override public IBinder onBind(Intent intent) { return mBinder; } public synchronized void setState(int state) { mState = state; if ( state == STATE_CONNECTING ) { Intent myIntent = new Intent(BT_CONNECTING); try { sendBroadcast(myIntent); } catch (NullPointerException e) {} } } </code></pre> <p>And here is part of my Activity class which is supposed to receive the broadcasted intents (<strong>EDITED</strong>):</p> <pre><code> private BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if(intent.getAction().equals(BTService.BT_CONNECTING)) mState = STATE_CONNECTING; } }; private ServiceConnection mConnection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder service) { LocalBinder binder = (LocalBinder) service; myService = binder.getService(); mBound = true; } public void onServiceDisconnected(ComponentName arg0) { mBound = false; } }; @Override public void onCreate(Bundle savedInstanceState) { Intent intent = new Intent(this, BTService.class); myService.bindService(intent, mConnection, Context.BIND_AUTO_CREATE); IntentFilter filter = new IntentFilter(BTService.BTConnecting); registerReceiver(receiver, filter); } </code></pre> <p>I get NullPointerException when calling sendBroadcast(intent) method. Any tips on solving this is greatly appreciated.</p> <p>here is the log:</p> <pre><code> FATAL EXCEPTION: main java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.mypackage/com.android.mypackage.MyActivity}: java.lang.NullPointerException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2787) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2803) at android.app.ActivityThread.access$2300(ActivityThread.java:135) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2136) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:144) at android.app.ActivityThread.main(ActivityThread.java:4937) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:521) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException at android.content.ContextWrapper.sendBroadcast(ContextWrapper.java:271) at com.android.mypackage.BTService.setState(BTService.java:68) at com.android.mypackage.BTService.connect(BTService.java:90) at com.android.mypackage.MyActivity.onCreate(MyActivity.java:78) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1069) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2751) </code></pre>
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    1. USAlex Lockwood
    1. USsjallamander
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    1. COPost the full stack trace from LogCat.
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      1. PONullPointerException at sendBroadcast() from Service to Activity
      1. USJustin Breitfeller
    2. COOk. I've edited main post now with stack trace from LogCat.
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      1. PONullPointerException at sendBroadcast() from Service to Activity
      1. USsjallamander
    3. COit doesn't make any sense that you are seeing a NPE in the logcat while you are catching this very exception. are you sure this is the code executed ?
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      1. USnjzk2
 

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