Question

我们可以覆盖硬件后退按钮功能。我有点困惑，请帮助我。

Answer 1

您还可以覆盖onBackPressed()：

@Override
public void onBackPressed(){
    //Your action
}

Answer 2

@Override public void onBackPressed(){
  //do your stuff here
}

如果有任何与特定密钥相关的内容，那么你可以这样做：

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.Any_Key_Code) {
        //your stuff here
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

Answer 3

看到这个

public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {

        Toast.makeText(getApplicationContext(), "back button pressed",
                Toast.LENGTH_SHORT).show();
        return true;
    }

    return super.onKeyDown(keyCode, event);
}

Answer 4

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        // do your stuff here
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

Answer 5

@Override
public void onBackPressed() {
    //  Action to be performed 
    super.onBackPressed(); 
}

覆盖android硬件后退按钮功能

5 个答案: