使用onResume方法重新启动Activity

Question

我想用onResume()方法重新启动一个活动.我以为我可以使用Intent来实现它,但这会以无限循环结束.

@Override
protected void onResume() {
    Intent intent = new Intent(MainActivity.this, MainActivity.class);
    MainActivity.this.startActivity(intent);
    finish();
    super.onResume();
}

有没有其他方法可以重新启动活动？

Answer 1

我会问你为什么要这样做......但这是我脑海里浮现的第一件事:

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...
    Log.v("Example", "onCreate");
    getIntent().setAction("Already created");
}

@Override
protected void onResume() {
    Log.v("Example", "onResume");

    String action = getIntent().getAction();
    // Prevent endless loop by adding a unique action, don't restart if action is present
    if(action == null || !action.equals("Already created")) {
        Log.v("Example", "Force restart");
        Intent intent = new Intent(this, Example.class);
        startActivity(intent);
        finish();
    }
    // Remove the unique action so the next time onResume is called it will restart
    else
        getIntent().setAction(null);

    super.onResume();
}

您应该使其"Already created"独特,以便其他任何意图都不会意外地执行此操作.