Null pointer exception while receiving at Broadcast receiver

Randy McEoin

2009-09-06 09:35:21 UTC

It would be best to check for null before attempting to use. Perhaps
whatever is issuing the broadcast is not adding the string extra.

String msg_receive = intent.getStringExtra("message1");
if (msg_receive != null) {
AssetTest.hh_text.append("\n\n"+msg_receive);
}

Randy

Post by Asif k
Hi all,
I am receiving Text messages from another application sent through
broadcast intent. I am displaying these messages to my application's
GUI.
In my application I had defined <broadcast receiver> in my
manifest.xml
------------------------------------------------------------------------------
<receiver android:name=".HHBroadcastReceiver">
<intent-filter>
<action android:name="android.demo.test"/>
</intent-filter>
</receiver>
-------------------------------------------------------------------------------------
and also define the logic in the Broadcast receiver class
-------------------------------------------------------------------------------------------
public class HHBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
//TODO: React to the Intent received.
String msg_receive = intent.getStringExtra("message1");
AssetTest.hh_text.append("\n\n"+msg_receive);}
}
---------------------------------------------------------------------------------------------
but I am getting following error,
java.lang.RuntimeException: Unable to start receiver
android.hh.HHBroadcastReceiver: java.lang.NullPointerException
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
android.app.ActivityThread.handleReceiver(ActivityThread.java:2417)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
android.app.ActivityThread.access$2700(ActivityThread.java:112)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1741)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
android.os.Handler.dispatchMessage(Handler.java:99)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
android.os.Looper.loop(Looper.java:123)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
android.app.ActivityThread.main(ActivityThread.java:3948)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
java.lang.reflect.Method.invokeNative(Native Method)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
java.lang.reflect.Method.invoke(Method.java:521)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
(ZygoteInit.java:782)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
dalvik.system.NativeStart.main(Native Method)
java.lang.NullPointerException
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
android.hh.HHBroadcastReceiver.onReceive(HHBroadcastReceiver.java:12)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): at
android.app.ActivityThread.handleReceiver(ActivityThread.java:2408)
09-04 10:49:04.275: ERROR/AndroidRuntime(912): ... 10 more
Please help.
Thanks,
Asif