Android 通知操作 - Intent Extra 未按预期工作

Question

I'm creating a notification with multiple actions. I'm using broadcast intents to communicate that one has been pushed and take specific action. There are 4 buttons, and I've created 4 separate intents. Each one has the same Action string, but a different StringExtra .

Intent intNow = new Intent(mThis, MyReceiver.class).setAction(actionNotify).putExtra("button", ACT_NOW);
    Intent intEmail = new Intent(mThis, MyReceiver.class).setAction(actionNotify).putExtra("button", ACT_EMAIL);
    Intent intLater = new Intent(mThis, MyReceiver.class).setAction(actionNotify).putExtra("button", ACT_LATER);
    Intent intNever = new Intent(mThis, MyReceiver.class).setAction(actionNotify).putExtra("button", ACT_NEVER);

    Notification.Builder myRatingNotification = new Notification.Builder(mThis)
            .setContentTitle(title)
            .setContentText(text)
            .setSmallIcon(R.mipmap.ic_launcher)
            .addAction(0, mThis.getString(R.string.Rate_Act_Now), PendingIntent.getBroadcast(mThis, 0, intNow, PendingIntent.FLAG_UPDATE_CURRENT))
            .addAction(0, mThis.getString(R.string.Rate_App_Email), PendingIntent.getBroadcast(mThis, 0, intEmail, PendingIntent.FLAG_UPDATE_CURRENT))
            .addAction(0, mThis.getString(R.string.Rate_Act_Later), PendingIntent.getBroadcast(mThis, 0, intLater, PendingIntent.FLAG_UPDATE_CURRENT))
            .addAction(0, mThis.getString(R.string.Rate_Act_Never), PendingIntent.getBroadcast(mThis, 0, intNever, PendingIntent.FLAG_UPDATE_CURRENT))
            .setAutoCancel(true);

    Notification notification = new Notification.BigTextStyle(myRatingNotification).bigText(text).build();
    ((NotificationManager) mThis.getSystemService(Context.NOTIFICATION_SERVICE)).notify(notificationId, notification);

So the notification is created successfully. The buttons are there. But no matter which one I push, the extra that is passed to the receiver is always the last action defined. That is, in the example above, every button returns a String Extra equal to ACT_NEVER . If I reorder the .addAction so intLater is last, the receiver tells me that the String Extra is equal to ACT_LATER , no matter which button I push.

I can't figure out why - the 4 Intents are completely independent of each other. The actions specify the correct Intent . What's going on? I'm stumped.

Answer 1

1. you should set an icon as first parameter,not 0.
2. your current result because you use same action and same requestCode to construct a PendingIntent,so the 4 PendingIntent will be the same,and you use PendingIntent.FLAG_UPDATE_CURRENT ,so the last PendingIntent's extra will replace pre one.

So to solve your problem,you just need to set different requestCode for four PendingIntent ,like this:

.addAction(0, mThis.getString(R.string.Rate_Act_Now), PendingIntent.getBroadcast(mThis, 0, intNow, PendingIntent.FLAG_UPDATE_CURRENT))
.addAction(0, mThis.getString(R.string.Rate_App_Email), PendingIntent.getBroadcast(mThis, 1, intEmail, PendingIntent.FLAG_UPDATE_CURRENT))
.addAction(0, mThis.getString(R.string.Rate_Act_Later), PendingIntent.getBroadcast(mThis, 2, intLater, PendingIntent.FLAG_UPDATE_CURRENT))
.addAction(0, mThis.getString(R.string.Rate_Act_Never), PendingIntent.getBroadcast(mThis, 3, intNever, PendingIntent.FLAG_UPDATE_CURRENT))

Answer 2

I have read documentation about addAction() , and quite interesting stuff is there:

• A notification in its expanded form can display up to 3 actions
• Every action must have an icon

You use 0 as a Icon, and 4 actions, maybe this have some impact on behavior