屏幕锁定时如何通知推送通知？

Posted 2023-02-24

【中文标题】屏幕锁定时如何通知推送通知？

【英文标题】：How to notify about the push notification when screen is locked?

【发布时间】：2015-05-16 13:45:45

【问题描述】：

大家好， 我是 android 开发新手，目前正在处理谷歌云消息，一切正常，但问题是我无法在锁定屏幕上获取应用程序定义的通知图标和颜色，就像其他应用程序给出的一样，比如什么是应用程序绿色和图标在锁定屏幕上显示类似 gmail 红色和主屏幕上显示的图标，所以任何人都可以告诉我如何实现它，我非常感谢你。

private void sendNotification(String msg) 
        Log.d(TAG, "Preparing to send notification...: " + msg);
        mNotificationManager = (NotificationManager) this
                .getSystemService(Context.NOTIFICATION_SERVICE);

        PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
                new Intent(this, MainActivity.class), 0);

        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
                this)
                .setSmallIcon(R.drawable.ic_launcher)
                .setContentTitle("GCM Notification")
                .setStyle(new NotificationCompat.BigTextStyle().bigText(msg))
                .setContentText(msg)
                .setColor(
                        getResources().getColor(
                                R.color.abc_primary_text_material_dark))
                .setVibrate(new long[]  1000, 1000, 1000, 1000, 1000 )
                .setSound(Settings.System.DEFAULT_NOTIFICATION_URI)
                .setContentInfo("hi")
                .setTicker("hi")
                .setPriority(Notification.PRIORITY_HIGH)
                .setVisibility(Notification.VISIBILITY_PUBLIC)
                .setLights(0x0000FF, 1000, 4000)
                ;

        PowerManager pm = (PowerManager) getApplicationContext()
                .getSystemService(Context.POWER_SERVICE);
        WakeLock wakeLock = pm
                .newWakeLock(
                        (PowerManager.SCREEN_BRIGHT_WAKE_LOCK
                                | PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP),
                        "TAG");
        wakeLock.acquire(15000);
        // Settings.System.putString(getApplicationContext().getContentResolver(),
        // Settings.System.NEXT_ALARM_FORMATTED, "hi");

        mBuilder.setContentIntent(contentIntent);
        mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
        Log.d(TAG, "Notification sent successfully.");
    

【问题讨论】：

请提供您尝试的代码。

连灯都不工作。

【参考方案1】：

Notification notif = new Notification(
                R.drawable.ic_launcher, message,
                System.currentTimeMillis());
        notif.flags = Notification.FLAG_AUTO_CANCEL;
        notif.defaults |= Notification.DEFAULT_SOUND;
        notif.defaults |= Notification.DEFAULT_VIBRATE;

        Intent notificationIntent = new Intent(context, WelcomeActivity.class);
        notificationIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
        PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
                notificationIntent, 0);

        notif.setLatestEventInfo(context, title, message, contentIntent);

【参考方案2】：

在您的代码中，它是通过setSmallIcon 设置的图标。代码中的值R.drawable.ic_launcher 指的是您的Android 项目的res/drawable 目录中的图像。您可以将其更改为R.drawable.<name of the icon you want to use>，只要该图像已放置在可绘制文件夹中即可。