创建相同活动时销毁活动

Question

I have 2 activities A and B, A is defined as "singletask" on the manifest launch mode, as it should be and i cannot change this. A launches activity B, then when B clicks the back button i want to launch activity A again, but i want to destroy the previous activity, and create a new instance of A. right now the following code is not working. It just takes me back to the old A activity.

<activity
            android:name="A"
            android:launchMode="singleTask"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme" />

 public void onBackPressed() {
        Intent intent = new Intent(this,A.class);
        intent.putExtra("newextra1","newextra1");
        intent.putExtra("newextra2","newextra2");
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(intent);
        finish();
    }

Answer 1

Just call finish() in Activity A after you call the intent for Activity B. It will be executed even if another Intent is started before calling finish().

You are calling finish() in Activity B but not Activity A.

if you want the old activity in some cases and new in some, then just pass a flag(boolean) in intent that tells the activity to restart or not. Then if the flag is yes you do

finish(); 
startActivity(getIntent());

in Activity A.

Answer 2

尝试：

intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);