时间：2021-01-17 14:05:17 | 栏目：Android代码 | 点击：次
Android onKeyDown监听返回键无效的解决办法
当我们的Activity继承了TabActivity,在该类中重写onKeyDown是监听不到返回键的,
具体解决方法如下:
重写dispatchKeyEvent
/**
* 退出
*/
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
if (event.getKeyCode() == KeyEvent.KEYCODE_BACK
&& event.getAction() == KeyEvent.ACTION_DOWN
&& event.getRepeatCount() == 0) {
//具体的操作代码
}
return super.dispatchKeyEvent(event);
}
如果仅仅是监听某个Activity的后退键,只需要覆写该方法即可.
@Override
public void onBackPressed() {
super.onBackPressed();
}
我们可以看看super.onBackPressed()方法默认的实现:
/**
* Called when the activity has detected the user's press of the back
* key. The default implementation simply finishes the current activity,
* but you can override this to do whatever you want.
*/
public void onBackPressed() {
finish();
}
如果想屏蔽后退键只需要把super.onBackPressed()方法注释即可
但是该方法不适用于TabActivity.
感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！