启动通知时，应用程序被发送到后台/最小化与HOME按钮

Question

我想开始通知，当我的应用程序去最小化与home按钮等(但不与BACK，当用户按回，它退出应用程序)。我创建onPause函数，但通知也开始当我按下后退按钮:)也许当后退是按下android启动onPause太。

Public void onPause(){
    try{
     NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
     Notification notification = new Notification(R.drawable.city, "Notification Test", System.currentTimeMillis());
     Context context = getApplicationContext();
     CharSequence contentTitle = "asdf TITLE asdf";
     CharSequence contentText = "blah blah";
     Intent notificationIntent = new Intent(HomeActivity.this, HomeActivity.class);
 notification.flags |= Notification.FLAG_SHOW_LIGHTS;
 //auto cancel after select
 notification.flags |= Notification.FLAG_AUTO_CANCEL; 
 PendingIntent contentIntent = PendingIntent.getActivity(HomeActivity.this, 0, notificationIntent, 0);
 notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
 mNotificationManager.notify(1, notification);
}catch(Exception e){}
}
super.onPause();

你知道吗?谢谢你的回答

Answer 1

是的，你是对的，当你按下后退按钮时，onPause()将被调用，之后是onDestroy()，这将破坏活动。

解决方案;

你需要做的是，你可以覆盖你的onBackPressed()，并添加一个标志，你按下后退按钮，在你的onPause()，你会检查该标志。

private flag = false; //global variable
@Override
public void onBackPressed() {
    flag = true; //set to true when you pressd back button
    super.onBackPressed();
}
public void onPause(){
    if(!flag) //check if backbutton is not pressed
    {
        try{
             NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
             Notification notification = new Notification(R.drawable.city, "Notification Test", System.currentTimeMillis());
             Context context = getApplicationContext();
             CharSequence contentTitle = "asdf TITLE asdf";
             CharSequence contentText = "blah blah";
             Intent notificationIntent = new Intent(HomeActivity.this, HomeActivity.class);
             notification.flags |= Notification.FLAG_SHOW_LIGHTS;
             //auto cancel after select
             notification.flags |= Notification.FLAG_AUTO_CANCEL; 
             PendingIntent contentIntent = PendingIntent.getActivity(HomeActivity.this, 0, notificationIntent, 0);
             notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
             mNotificationManager.notify(1, notification);
             flag = false; //reset you flag
        }catch(Exception e){}
    }

    super.onPause();
}