Question

我有一个 RecyclerView ，其中显示了在设备上找到的所有歌曲。

适配器类

holder.constraintLayout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //Store songList and songIndex in mSharedPreferences
            storageUtil.storeSong(Main.musicList);
            storageUtil.storeSongIndex(holder.getAdapterPosition());

            //Send media with BroadcastReceiver
            Intent broadCastReceiverIntent = new Intent(Constants.ACTIONS.BROADCAST_PlAY_NEW_SONG);
            sendBroadcast(broadCastReceiverIntent);

            Intent broadCastReceiverIntentUpdateSong = new Intent(Constants.ACTIONS.BROADCAST_UPDATE_SONG);
            sendBroadcast(broadCastReceiverIntentUpdateSong);
        }
    });

我想要实现的是，当在 RecyclerView 中单击歌曲时，会将广播发送到我的服务类中，因此一首歌曲开始播放。

sendBroadcast无法解决，那么如何从适配器类发送广播意图？

我还想知道这是正确的方法还是在适配器中发送广播的更好方法，因为我在某处阅读了 BroadcastReceivers 不属于适配器类。

Answer 1

根本原因：：sendBroadcast是Context类的一种方法，因为您在Adapter类中调用它，所以编译器为何显示错误“ sendBroadcast”无法解决”。

解决方案：：从视图实例获取上下文，然后调用sendBroadcast方法。

holder.constraintLayout.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        //Store songList and songIndex in mSharedPreferences
        storageUtil.storeSong(Main.musicList);
        storageUtil.storeSongIndex(holder.getAdapterPosition());

        // Obtain context from view instance.
        Context context = v.getContext();

        //Send media with BroadcastReceiver
        Intent broadCastReceiverIntent = new Intent(Constants.ACTIONS.BROADCAST_PlAY_NEW_SONG);
        context.sendBroadcast(broadCastReceiverIntent);

        Intent broadCastReceiverIntentUpdateSong = new Intent(Constants.ACTIONS.BROADCAST_UPDATE_SONG);
        context.sendBroadcast(broadCastReceiverIntentUpdateSong);
    }
});

如何在recyclerview适配器类中发送广播？

1 个答案: