CODEWITHSUNDEEP
javaandroid
user2764027
user2764027

Reputation: 45

Launch Activity from BroadcastReceiver

I've used BroadcastReceiver which alarms every 10 seconds and here when it alarms it launches an activity of my app or my application. How can I create that launch?

   public void onReceive(Context context, Intent intent) { 
      generateNotification(context,"Hi how are you?");
      String action = intent.getAction(); 
      Intent yourintent = new Intent(null, OutPut.class); 
      yourintent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
      context.startActivity(yourintent);
      if (SOMEACTION.equals(action)) { 
          generateNotification(context,"Hi how are you?"); 
      }
   }

logcat by onclick to start activity : 

by onclick it returns :
09-12 12:00:54.750: E/AndroidRuntime(2251): FATAL EXCEPTION: main
09-12 12:00:54.750: E/AndroidRuntime(2251): Process: com.manish.alarmmanager, PID: 2251
09-12 12:00:54.750: E/AndroidRuntime(2251): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.manish.alarmmanager/com.manish.alarmmanager.OutPut}: java.lang.NullPointerException
09-12 12:00:54.750: E/AndroidRuntime(2251):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2176)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2226)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at android.app.ActivityThread.access$700(ActivityThread.java:135)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at android.os.Handler.dispatchMessage(Handler.java:102)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at android.os.Looper.loop(Looper.java:137)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at android.app.ActivityThread.main(ActivityThread.java:4998)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at java.lang.reflect.Method.invokeNative(Native Method)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at java.lang.reflect.Method.invoke(Method.java:515)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at dalvik.system.NativeStart.main(Native Method)
09-12 12:00:54.750: E/AndroidRuntime(2251): Caused by: java.lang.NullPointerException
09-12 12:00:54.750: E/AndroidRuntime(2251):     at com.android.internal.os.LoggingPrintStream.println(LoggingPrintStream.java:298)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at com.manish.alarmmanager.OutPut.onCreate(OutPut.java:21)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at android.app.Activity.performCreate(Activity.java:5243)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
09-12 12:00:54.750: E/AndroidRuntime(2251):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2140)
09-12 12:00:54.750: E/AndroidRuntime(2251):     ... 11 more

Upvotes: 1

Views: 104

Answers (1)

Nabin
Nabin

Reputation: 11786

In side the onRecieve() method use 

context.startActivity(yourintent);

Here context is passed as an argument in onRecieve() method.

You have to create yourintent as usual

But you may have to set a flag to intent as follow:

yourintent.setFlag(Intent.FLAG_ACTIVITY_NEW_TASK)

Upvotes: 1

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