Android Intent to start Main activity of application

28,452

Solution 1

this is not the right way to startActivity.
try this code instead:

Intent startIntent = new Intent(context, MainActivity.class);
startIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        
context.startActivity(startIntent);

Solution 2

Copy from another topic:

This works since API Level 3 (Android 1.5):

private void startMainActivity(Context context) throws NameNotFoundException {
    PackageManager pm = context.getPackageManager();
    Intent intent = pm.getLaunchIntentForPackage(context.getPackageName());
    context.startActivity(intent);
}

Solution 3

Even I had been trying to launch the MainActivity via a library Activity.

And this worked for me:

Intent startIntent = new Intent();
startIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startIntent.setPackage(getApplicationContext().getPackageName());
getApplicationContext().startActivity(startIntent);

Make sure you add the activity in your library's manifest!

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Abhishek
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Abhishek

Master student at Georgia Tech. Android Developer. Interest in User Experience. Weekly online programming competitions. Entrepreneur.

Updated on July 21, 2022

Comments

  • Abhishek
    Abhishek almost 2 years

    I am trying to start the main activity from inside a BroadcastReceiver. I dont want to supply the activity class name but to use the action and category for android to figure out the main activity.

    It doesnt seem to work.

    Sending Code:

    Intent startIntent = new Intent();
    
    startIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startIntent.setAction(Intent.ACTION_MAIN);
    startIntent.setPackage(context.getPackageName());
    startIntent.addCategory(Intent.CATEGORY_LAUNCHER);        
    context.startActivity(startIntent);
    

    I get this error:

    Caused bt: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 pkg=com.xyz.abc (has extras) }

    Any ideas?