Question

我想在我的应用程序按主页按钮等进行最小化时开始通知（但不是使用BACK，当用户按下时，它会退出应用程序）。我创建了onPause函数，但是当我按下按钮时也会启动通知:)也许当按下后面时，android启动onPause也是。

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();

任何想法？谢谢你的回答

Answer 1

是的，当你按下后面时你是对的，onPause()会被调用，之后是onDestroy()，这会破坏活动。

<强>溶液;

您需要做的是，您可以覆盖onBackPressed()并添加按下后退按钮的标记，并在onPause()中检查该标记。

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();
}

应用程序发送到后台时开始通知/使用HOME按钮最小化

1 个答案: