Freewind Freewind - 7 days ago 7
Android Question

How to get the intent extras if the activity is `singleTask`?

I have an activity, which is a singleTask:

public class MyActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

System.out.printf("### MyAcitvity.onCreate: " + getIntent().getExtras());
}

@Override
protected void onResume() {
super.onResume();
System.out.println("### MyActivity.onResume: " + getIntent().getExtras());
}

public void toNext(View v) {
startActivity(new Intent(this, AaaActivity.class));
}
}


and:

<activity android:name=".MyActivity" android:launchMode="singleTask" />


No it has been started, and it started another activity called
AaaActivity
.

public class AaaActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.aaa);
}

public void jumpToFirst(View v) {
Intent intent = new Intent(this, MyActivity.class);
intent.putExtra("aaa","bbb");
startActivity(intent);
}

}


In the later one, there is a button which will trigger the
jumpToFirst
method to start the first one, and pass a data pair
aaa=bbb
. Since
MyActivity
is
singleTask
, it won't create a new one, instead, it will just back to the existing
MyActivity
instance.

My question is: how to get the passing extra data from
AaaActivity
in
MyActivity
?

You can see I have logged
onCreate
and
onResume
methods, but it prints null extra data.

11-16 08:44:17.833: INFO/System.out(5171): ### MyAcitvity.onCreate: null
11-16 08:44:19.417: INFO/System.out(5171): ### MyActivity.onResume: null
11-16 08:44:26.041: INFO/System.out(5171): ### MyActivity.onResume: null
11-16 08:44:28.897: INFO/System.out(5171): ### MyActivity.onResume: null

Answer

Try setting the launchMode type of your MyActivity as singleTop and then override the following method to look for the new intent:

@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    setIntent(intent);
    //now getIntent() should always return the last received intent
}