Java 在Android上向适配器添加项目时出现ConcurrentModificationException
在这个方法中,我尝试在Java 在Android上向适配器添加项目时出现ConcurrentModificationException,java,android,retrofit2,Java,Android,Retrofit2,在这个方法中,我尝试在listSong上循环查找歌手ID: private void getAllSongBySinger() { SongService songService = ServiceGenerator.createService(SongService.class); Call<SongRespones> callAllSong = songService.findAllSongBySinger(); callAllSong.enqueue(n
listSong
上循环查找歌手ID:
private void getAllSongBySinger() {
SongService songService = ServiceGenerator.createService(SongService.class);
Call<SongRespones> callAllSong = songService.findAllSongBySinger();
callAllSong.enqueue(new Callback<SongRespones>() {
@Override
public void onResponse(Call<SongRespones> call, Response<SongRespones> response) {
listSong = new ArrayList<>();
songRespones = response.body();
listSong = songRespones.getSongs();
for (SongRespones.Songs songs : listSong) {
if (songs.getSinger().getId() == getSingerId) {
listSong.add(songs);
adapter.addMoreItem(listSong);
rvSongBySinger.setAdapter(adapter);
}
}
}
@Override
public void onFailure(Call<SongRespones> call, Throwable t) {
t.printStackTrace();
}
});
}
如何在循环后将
listSong
添加到适配器?异常应该是不言自明的:您试图同时修改listSong
(在列表本身循环时)。我不能告诉你正确的答案是什么,因为我不知道你打算做什么,但这通常不是你应该做的事情。例外情况应该是不言自明的:你试图同时修改listSong
(当你在列表中循环时)。我不能告诉你正确的答案是什么,因为我不知道你打算做什么,但这通常不是你应该做的事情。可能的重复
08-11 18:44:54.852 2280-2280/com.vichit.khmersong E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.vichit.khmersong, PID: 2280
java.util.ConcurrentModificationException
at java.util.ArrayList$ArrayListIterator.next(ArrayList.java:573)
at com.vichit.khmersong.fragment.main.DetailSingerSongFragment$1.onResponse(DetailSingerSongFragment.java:76)
at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run(ExecutorCallAdapterFactory.java:70)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)