Question

我有活动A，有计时器线程。 5秒后，它会通过意图跳转到活动B.当你在活动B上时如何销毁活动A，这样后退按钮就不会让你回到活动A.

Answer 1

您必须清除活动后台堆栈。

intent = new Intent(this, Activity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
StartActivity(intent);

Answer 2

从A到B

制作意图时，只需致电finish()

Answer 3

试试这个......

<强> MainActivity.java：

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    new Waiting(5);
}

public class Waiting {
    Timer timer;

    public Waiting(int seconds) {
        timer = new Timer();
        timer.schedule(new WaitingTask(), seconds * 1000);
    }

    class WaitingTask extends TimerTask {

        @Override
        public void run() {
            System.out.println("Hi, I'm waiting here!");

            Intent intent = new Intent(MainActivity.this,
                    MainActivity1.class);
            MainActivity.this.finish();
            startActivity(intent);
            timer.cancel();
        }

    }
}
 }

<强> MainActivity1.java

public class MainActivity1 extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_activity1);
  }

}

快乐的编码......

跳转到下一个活动时如何销毁以前的活动

3 个答案: