这似乎是一个很常见的问题，但其他问题都没有帮助我解决这个问题。所以，问题是，我有一个 recyclerview，它在我滚动时复制项目。像这样: duplicated items.
看起来可滚动列表下方有一个固定列表。 这是我的适配器:
public class FriendsListAdapter extends RecyclerView.Adapter<FriendsListAdapter.ViewHolder> {
private ArrayList<Friend> mDataset;
private Context ctx;
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView friendName;
public ImageView friendPicture;
public ViewHolder(View v) {
super(v);
friendName = (TextView) v.findViewById(R.id.friendName);
friendPicture = (ImageView) v.findViewById(R.id.friendPicture);
}
}
public FriendsListAdapter(ArrayList<Friend> myDataset, Context context) {
mDataset = myDataset;
ctx = context;
}
@Override
public FriendsListAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.friend_item, parent, false);
ViewHolder vh = new ViewHolder(v);
return vh;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.friendName.setText(mDataset.get(position).getName());
holder.friendName.setTag(mDataset.get(position));
//
// if(mDataset.get(position).getImageUrl() != null && !mDataset.get(position).getImageUrl().isEmpty()) {
// holder.friendPicture.setImageBitmap(null);
//
// Transformation transformation = new RoundedTransformationBuilder()
// .cornerRadiusDp(50)
// .oval(false)
// .build();
//
// Picasso.with(ctx)
// .load(mDataset.get(position).getImageUrl())
// .fit()
// .transform(transformation)
// .into(holder.friendPicture);
// }
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return mDataset.size();
}
}
picasso 部分被评论是因为我正在测试看是否是问题所在。
这是我 fragment 的 onCreateView:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View view = inflater.inflate(R.layout.fragment_friends_list, container, false);
mRecyclerView = (RecyclerView) view.findViewById(R.id.my_recycler_view);
mLayoutManager = new LinearLayoutManager(getActivity());
mRecyclerView.setLayoutManager(mLayoutManager);
mDataset = new ArrayList<>();
final ArrayList<String> values = new ArrayList<String>();
if(MyApp.getConfigHelper().getFriends() == null || MyApp.getConfigHelper().getFriends().isEmpty()) {
Bundle params = new Bundle();
params.putString("fields", "id, name, picture");
GraphRequest request = GraphRequest.newMyFriendsRequest(
AccessToken.getCurrentAccessToken(),
new GraphRequest.GraphJSONArrayCallback() {
@Override
public void onCompleted(JSONArray array, GraphResponse response) {
FacebookRequestError error = response.getError();
if (error == null) {
try {
Friend pictureByName;
for (int i = 0; i < array.length(); i++) {
values.add(array.getJSONObject(i).getString("name"));
JSONObject arrayObject = array.getJSONObject(i);
JSONObject picObject = arrayObject.getJSONObject("picture");
String fbId = arrayObject.getString("id");
String picUrl = picObject.getJSONObject("data").getString("url");
pictureByName = new Friend(fbId, values.get(i), picUrl);
mDataset.add(pictureByName);
}
Collections.sort(mDataset);
MyApp.getConfigHelper().setFriends(mDataset);
mAdapter = new FriendsListAdapter(mDataset, getActivity());
mRecyclerView.setAdapter(mAdapter);
} catch (JSONException e) {
}
}
}
});
request.setParameters(params);
request.executeAsync();
} else {
mDataset = MyApp.getConfigHelper().getFriends();
mAdapter = new FriendsListAdapter(mDataset, getActivity());
mRecyclerView.setAdapter(mAdapter);
}
return view;
}
这是框架:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
tools:context="com.myApp.Activity.FriendsListActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/my_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical" />
</RelativeLayout>
你们知道发生了什么事吗？
最佳答案
努力改变
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
tools:context="com.myApp.Activity.FriendsListActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/my_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical" />
</RelativeLayout>
通过:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
tools:context="com.myApp.Activity.FriendsListActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/my_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical" />
</LinearLayout>
我认为 RelativeLayout 叠加了你的 Recycler 的每一页
关于android - Recyclerview 滚动上的重复项，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36240878/