public static PendingIntent getBroadcast(Context context, int requestCode,
Intent intent, @Flags int flags);
public static PendingIntent getActivities(Context context, int requestCode,
@NonNull Intent[] intents, @Flags int flags);
public static PendingIntent getActivity(Context context, int requestCode,
Intent intent, @Flags int flags);
public static PendingIntent getBroadcast(Context context, int requestCode,
Intent intent, @Flags int flags);
public static PendingIntent getService(Context context, int requestCode,
@NonNull Intent intent, @Flags int flags);
public static PendingIntent getForegroundService(Context context, int requestCode,
@NonNull Intent intent, @Flags int flags);
坑1.发送的广播接收不到
解决：创建PendingIntent时指定接收广播的receiver
坑2.连续创建两个PendingIntent，只有extra不同，接收到的广播只有一个值
解决：只能通过更改action才行
