startActivity in onCreate()

Question

我需要在另一个活动的onCreate中启动活动，直到activity2完成。怎么做？

public class Activity1 extends Activity{
    protected void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        //do some code
        startActivity(Activity2)
        //wait until activity2 finish
        //another code which can be done after activity2 finish
    }
 ...
 }

或者我需要用another code异步方式做OnActivityResult？？

Answer 1

您可以像activity2一样启动startActivityForResult(意图，requestCode)。

在finsh onActivityResult(int arg0，int arg1，意图arg2)中做任何你想做的事情。

Answer 2

你应该试试这条路。

public class FirstActivity extends Activity{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Intent i = new Intent(SecondActivity.this, getApplicationContext());

        int requestCode = 0;
        startActivityForResult(i,requestCode);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

       // do your stuff here after SecondActivity finished.
    }
}

希望这能帮到你。

Answer 3

您可以使用startActivtyForResult方法启动activty2，然后当onActivityResult of activty1为第一个调用setContentView时