android custom notification bar and monitor through broadcast

Used to achieve similar music player notification bar functions (play, pause, previous and next song)

1. Customize the notification bar

  NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "default");
                builder.setSmallIcon(android.R.drawable.sym_def_app_icon);
                RemoteViews rv = new RemoteViews(getPackageName(), R.layout.message);
                rv.setTextViewText(R.id.tv, "泡沫");//修改自定义View中的歌名
                //修改自定义View中的图片(两种方法)
                rv.setImageViewResource(R.id.iv, R.mipmap.ic_launcher);
                rv.setImageViewBitmap(R.id.iv, BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher));
                builder.setContent(rv);
//设置button监听为发送广播------------------
                Intent previous = new Intent("com.example.Bean.MyBroadcastReceiver");
                PendingIntent pi_previous = PendingIntent.getBroadcast(Tongzhi.this, 0,
                        previous, PendingIntent.FLAG_UPDATE_CURRENT);
                rv.setOnClickPendingIntent(R.id.btn1, pi_previous);
//----------------------------------------
                Notification notification = builder.build();
                NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                notificationManager.notify(0x1, notification);

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center">
    <ImageView
        android:id="@+id/iv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/ic_launcher"/>
    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:text="仗剑走天涯"/>
    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="播放"/>
    <Button
        android:id="@+id/btn2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="下一首"/>
</LinearLayout>

2. Custom broadcast

public class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "okgb", Toast.LENGTH_SHORT).show();
    }
}

................      
 </activity>

        <receiver
            android:name=".Bean.MyBroadcastReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter ><action android:name="com.example.Bean.MyBroadcastReceiver"></action> </intent-filter>
        </receiver>
    </application>

Send this broadcast to test whether the broadcast is registered successfully

  Intent integer = new Intent("com.example.Bean.MyBroadcastReceiver");
                sendBroadcast(integer);