我有一個RecyclerView顯示設備上找到的所有歌曲。適配器類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); } });我想要實現的是，當在RecyclerView中單擊一首歌曲時，一個廣播被發送到我的服務類，因此一首歌曲開始播放。sendBroadcast 無法解決，那么如何從我的適配器類發送廣播意圖？我也想知道這是否是正確的方法，或者是否有更好的方法在適配器中發送廣播，因為我在某處讀到BroadcastReceivers不屬于適配器類。
1 回答
慕容708150
TA貢獻1831條經驗 獲得超4個贊
根本原因： sendBroadcast是Context類的方法，因為你在Adapter類中調用它，所以編譯器顯示錯誤“sendBroadcast 無法解析”。
解決方案：從視圖實例中獲取上下文，然后調用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);
}
});
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