1、创建基类，注册广播Receiver，发送广播，注销广播Receiver，退出应用
public class BaseActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//注册广播
IntentFilter filter = new IntentFilter();
filter.addAction("com.lioil.win.close");
registerReceiver(new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
//注销广播
unregisterReceiver(this);
((Activity) context).finish();
}
}, filter);
}
public void close() {
//发送广播
Intent intent = new Intent();
intent.setAction("com.lioil.win.close");
sendBroadcast(intent);
finish();
}
}
2、所有Activity都继承BaseActivity
Public class MyActivity extends BaseActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.a1);
}
private long exitTime = 0;
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(keyCode == KeyEvent.KEYCODE_BACK){
//时间间隔大于2秒不退出
if((System.currentTimeMillis()-exitTime) > 2000){
Toast.makeText(getApplicationContext(), "再按一次退出程序", Toast.LENGTH_SHORT).show();
exitTime = System.currentTimeMillis();
} else {
//使用基类BaseActivity方法,发送广播给所有Activity，退出应用
close();
}
return true;
}
return super.onKeyDown(keyCode, event);
}
}
简书: http://www.jianshu.com/p/216e26f5c619
CSDN博客: http://blog.csdn.net/qq_32115439/article/details/51020814
GitHub博客: http://lioil.win/2016/03/31/Exit-Android-App.html
Coding博客: http://c.lioil.win/2016/03/31/Exit-Android-App.html
