新意向不会第一次开始

Question

I have 3 intents A->B->C

from C to get back to A you bring up the menu and click home. This finishes B and C and opens A which in the manifest is set as a singletask.

This all works perfectly, but when I try to open B from A again I have to click twice on the button that starts B. Whereas when the app first opens I have to click only the once to open B

Why could this be like this?

I think I know why. I think B is not finishing when I go from C to A. This is the code running on C

    Intent Intent = new Intent(this, com.home.test.Home.class);
    this.setResult(1, Intent);
    startActivity(Intent);
    this.finish();

And it should trigger this on B if I am correct

    public void onActivityResult(int requestCode, int resultCode, Intent data) {
    this.finish();
}

Answer 1

You do not need singleTask , in all likelihood. In C, when you call startActivity() , pass FLAG_ACTIVITY_CLEAR_TOP|FLAG_ACTIVITY_SINGLE_TOP as the Intent flags. That will finish C and B en route to starting A.