如何在android中禁用后退按钮

Question

我正在进行交换应用程序...我想禁用后退按钮.所以我使用这个代码...并将意图传递给它..

@Override
public boolean onKeyDown(int keyCode, KeyEvent event)  {
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
        // do something on back.
        return true;
    }

    return super.onKeyDown(keyCode, event);
}

但是当我按下模拟器上的后退按钮时它会更新活动,但是当我按下后退按钮时它会切换到模拟器的主页..请建议是他们的任何其他方法

Answer 1

@Override
public void onBackPressed() {
    // do nothing.
}

Answer 2

 @Override
 public void onBackPressed() {

    //super.onBackPressed();
    if(SOME_CONDITION_TO_CHECK){
        //THIS BLOCK WILL NOT DO ANYTHING AND WOULD DISABLE BACK BUTTON             
    }else{
       super.onBackPressed();
       //THIS BLOCK WILL BE CALLED IF ABOVE COND IS FALSE, AND WOULD ENABLE BACK BUTTON
    }   

 }

Answer 3

你试过onBackPressed()吗？

@Override
public void onBackPressed() {
       // Do as you please
}