通知区域中用于自定义音频播放器的开始/停止控件

Question

我正在使用Notification类发布用于自定义媒体播放器控件的解决方案。我希望它可以帮助其他人并节省他们的时间。

新的androidx对媒体播放器对象具有特殊的风格，我在他们的文档中没有看到它，但是效果很好：

.setStyle(new androidx.media.app.NotificationCompat.MediaStyle())

确保同时提供了大图标和小图标。

按钮添加有“ addAction”。此方法需要一个未决的意图。这是作为广播创建的，但保留在应用程序上下文中。在这种情况下，我已经注册了两个BroadcastRecivers：一个用于“播放”按钮，另一个用于“暂停”按钮。可以先做一个，然后再切换/案例。

最后，必须创建一个通知频道。没有该代码，根本不会显示任何通知。

public class PlayBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "Play!! Starting the media player here.", Toast.LENGTH_LONG).show();
    }
}

public class StopBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "Pause!! Pausing the media player here.", Toast.LENGTH_LONG).show();
    }
}

   void initPlayerControls() {
        Intent notifyIntent = new Intent(this, MainActivity.class);
        PendingIntent notifyPendingIntent =
                PendingIntent.getActivity(
                        this,
                        0,
                        notifyIntent,
                        PendingIntent.FLAG_UPDATE_CURRENT
                );

        final String PLAY = "tech.mycompany.app.PLAY";
        Intent playIntent = new Intent(PLAY);
        PendingIntent playPendingIntent =
                PendingIntent.getBroadcast(getBaseContext(), 0, playIntent, 0);
        IntentFilter playIntentFilter = new IntentFilter();
        playIntentFilter.addAction(PLAY);
        getBaseContext().registerReceiver(new PlayBroadcastReceiver(),playIntentFilter);

        final String STOP = "tech.mycompany.app.STOP";
        Intent stopIntent = new Intent(STOP);
        PendingIntent stopPendingIntent =
                PendingIntent.getBroadcast(getBaseContext(), 0, stopIntent, 0);
        IntentFilter stopIntentFilter = new IntentFilter();
        stopIntentFilter.addAction(STOP);
        getBaseContext().registerReceiver(new StopBroadcastReceiver(),stopIntentFilter);

        final Notification notification = new NotificationCompat.Builder(getApplicationContext(), NOTIFICATION_CH)
                .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
                .setSmallIcon(R.drawable.top_logo)
                .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.top_logo))
                .addAction(R.drawable.icon_play, "Play", playPendingIntent)  // #1
                .addAction(R.drawable.icon_pause, "Pause", stopPendingIntent)  // #2
                .setContentTitle("Wonderful music")
                .setStyle(new androidx.media.app.NotificationCompat.MediaStyle())
                .setContentIntent(notifyPendingIntent)
                .setDefaults(NotificationCompat.DEFAULT_ALL)
                .setPriority(NotificationCompat.PRIORITY_DEFAULT)
                .setColor(ContextCompat.getColor(getApplicationContext(), R.color.app_medium_color_transparent))
                .build();

        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            int importance = NotificationManager.IMPORTANCE_DEFAULT;
            NotificationChannel channel = new NotificationChannel(NOTIFICATION_CH, "player", importance);
            channel.setDescription("Player channel");
            NotificationManager nm = getSystemService(NotificationManager.class);
            if (null != nm) {
                nm.createNotificationChannel(channel);
            }
        }

        // notificationId is a unique int for each notification that you must define
        notificationManager.notify(888, notification);
    }