回收器 View 不一致检测到错误，在快速滚动或在加载更多项目时滚动时出现。
FATAL EXCEPTION: main
Process: com.pratap.endlessrecyclerview, PID: 21997
java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid view holder adapter positionViewHolder{56a082c position=40 id=-1, oldPos=39, pLpos:39 scrap [attachedScrap] tmpDetached no parent}
at android.support.v7.widget.RecyclerView$Recycler.validateViewHolderForOffsetPosition(RecyclerView.java:4251)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4382)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4363)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:1961)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1370)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1333)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:562)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2864)
at android.support.v7.widget.RecyclerView.consumePendingUpdateOperations(RecyclerView.java:1445)
at android.support.v7.widget.RecyclerView.access$400(RecyclerView.java:144)
at android.support.v7.widget.RecyclerView$1.run(RecyclerView.java:282)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:603)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:746)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
适配器
public class DataAdapter extends RecyclerView.Adapter {
private final int VIEW_ITEM = 1;
private final int VIEW_PROG = 0;
private List<Feed> mFeed;
// The minimum amount of items to have below your current scroll position
// before loading more.
private int visibleThreshold = 5;
private int lastVisibleItem, totalItemCount;
private boolean loading;
private OnLoadMoreListener onLoadMoreListener;
public DataAdapter(List<Feed> feeds, RecyclerView recyclerView) {
mFeed = feeds;
if (recyclerView.getLayoutManager() instanceof LinearLayoutManager) {
final LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView
.getLayoutManager();
recyclerView
.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView,
int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
totalItemCount = linearLayoutManager.getItemCount();
lastVisibleItem = linearLayoutManager
.findLastVisibleItemPosition();
if (!loading
&& totalItemCount <= (lastVisibleItem + visibleThreshold)) {
// End has been reached
// Do something
if (onLoadMoreListener != null) {
onLoadMoreListener.onLoadMore();
}
loading = true;
}
}
});
}
}
@Override
public int getItemViewType(int position) {
return mFeed.get(position) == null ? VIEW_PROG : VIEW_ITEM;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
RecyclerView.ViewHolder vh;
if (viewType == VIEW_ITEM) {
View v = LayoutInflater.from(parent.getContext()).inflate(
R.layout.list_row, parent, false);
vh = new StudentViewHolder(v);
}
else {
View v = LayoutInflater.from(parent.getContext()).inflate(
R.layout.progress_item, parent, false);
vh = new ProgressViewHolder(v);
}
return vh;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (holder instanceof StudentViewHolder) {
Feed singleStudent= (Feed) mFeed.get(position);
((StudentViewHolder) holder).tvName.setText(singleStudent.getTitle());
((StudentViewHolder) holder).student= singleStudent;
} else {
ProgressViewHolder.PROGRESS_BAR.setIndeterminate(true);
}
}
public void setLoaded() {
loading = false;
}
public void addFeed(Feed feed) {
mFeed.add(feed);
//mFeed.addAll(0, (Collection<? extends Feed>) feed);
notifyItemInserted(mFeed.size());
//notifyItemRangeInserted(0,mFeed.size());
notifyDataSetChanged();
//notifyItemInserted(mFeed.size());
//setLoaded();
//notifyItemInserted(mFeed.size());
}
public void removeAll(){
mFeed.clear();
notifyDataSetChanged();
}
@Override
public int getItemCount() {
return mFeed.size();
}
public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) {
this.onLoadMoreListener = onLoadMoreListener;
}
public static class StudentViewHolder extends RecyclerView.ViewHolder {
public TextView tvName;
public Feed student;
public StudentViewHolder(View v) {
super(v);
tvName = (TextView) v.findViewById(R.id.tvName);
//tvEmailId = (TextView) v.findViewById(R.id.tvEmailId);
}
}
public static class ProgressViewHolder extends RecyclerView.ViewHolder {
//public ProgressBar progressBar;
public static ProgressBar PROGRESS_BAR;
public ProgressViewHolder(View v) {
super(v);
PROGRESS_BAR = (ProgressBar) v.findViewById(R.id.progressBar1);
// progressBar = (ProgressBar) v.findViewById(R.id.progressBar1);
}
}
}
事件
public class MainActivity extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener {
private Toolbar toolbar;
private TextView tvEmptyView;
private RecyclerView mRecyclerView;
private DataAdapter mAdapter;
private LinearLayoutManager mLayoutManager;
private RestManager mManager;
private List<Feed> mFeed;
SwipeRefreshLayout mSwipeRefreshLayout;
protected Handler handler;
private int currentPage=1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
tvEmptyView = (TextView) findViewById(R.id.empty_view);
mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
mSwipeRefreshLayout= (SwipeRefreshLayout) findViewById(R.id.swipe_refresh_layout);
mSwipeRefreshLayout.setOnRefreshListener(this);
//studentList = new ArrayList<Student>();
mFeed = new ArrayList<Feed>();
handler = new Handler();
if (toolbar != null) {
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Android Students");
}
mManager = new RestManager();
// use this setting to improve performance if you know that changes
// in content do not change the layout size of the RecyclerView
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(this);
// use a linear layout manager
mRecyclerView.setLayoutManager(mLayoutManager);
// create an Object for Adapter
mAdapter = new DataAdapter(mFeed,mRecyclerView);
// set the adapter object to the Recyclerview
mRecyclerView.setAdapter(mAdapter);
// mAdapter.notifyDataSetChanged();
loadData(false);
// if (mFeed.isEmpty()) {
// mRecyclerView.setVisibility(View.GONE);
// tvEmptyView.setVisibility(View.VISIBLE);
//
// } else {
// mRecyclerView.setVisibility(View.VISIBLE);
// tvEmptyView.setVisibility(View.GONE);
// }
mAdapter.setOnLoadMoreListener(new OnLoadMoreListener() {
@Override
public void onLoadMore() {
//add null , so the adapter will check view_type and show progress bar at bottom
mFeed.add(null);
mAdapter.notifyItemInserted(mFeed.size() - 1);
handler.postDelayed(new Runnable() {
@Override
public void run() {
// remove progress item
mFeed.remove(mFeed.size() - 1);
// mAdapter.notifyItemRemoved(mFeed.size());
//add items one by one
int start = mFeed.size();
currentPage++;
Log.d("CurrentPage", String.valueOf(currentPage));
Call<Results> listCall = mManager.getFeedApi().getAllFeeds(1);
listCall.enqueue(new Callback<Results>() {
@Override
public void onResponse(Call<Results> call, Response<Results> response) {
mSwipeRefreshLayout.setRefreshing(false);
if (response.isSuccess()) {
if (response.body() != null) {
Results feedList = response.body();
// List<Results> newUsers = response.body();
Log.d("Retrofut", String.valueOf(feedList));
for (int i = 0; i < feedList.results.size(); i++) {
Feed feed = feedList.results.get(i);
// mFeed.add(feed);
mAdapter.addFeed(feed);
// mAdapter.notifyDataSetChanged();
//mAdapter.notifyItemInserted(mFeed.size());
}
// mAdapter.notifyDataSetChanged();
}
}
}
@Override
public void onFailure(Call<Results> call, Throwable t) {
Log.d("Retrofut", "Error");
mFeed.remove(mFeed.size() - 1);
mAdapter.notifyItemRemoved(mFeed.size());
mAdapter.setLoaded();
mSwipeRefreshLayout.setRefreshing(false);
}
});
// for (int i = 1; i <= 20; i++) {
// studentList.add(new Student("Student " + i, "androidstudent" + i + "@gmail.com"));
//
// }
mAdapter.setLoaded();
//or you can add all at once but do not forget to call mAdapter.notifyDataSetChanged();
}
}, 2000);
}
});
}
// load initial data
private void loadData(final boolean removePreData) {
Call<Results> listCall = mManager.getFeedApi().getAllFeeds(1);
listCall.enqueue(new Callback<Results>() {
@Override
public void onResponse(Call<Results> call, Response<Results> response) {
if (response.isSuccess()) {
if (response.body() != null) {
// if(removePreData) mAdapter.removeAll();
Results feedList = response.body();
Log.d("Retrofut", String.valueOf(feedList));
for (int i = 0; i < feedList.results.size(); i++) {
Feed feed = feedList.results.get(i);
// mFeed.add(feed);
//mAdapter.notifyDataSetChanged();
mAdapter.addFeed(feed);
}
mSwipeRefreshLayout.setRefreshing(false);
}
}
}
@Override
public void onFailure(Call<Results> call, Throwable t) {
Log.d("Retrofut", String.valueOf(t));
mFeed.remove(mFeed.size() - 1);
mAdapter.notifyItemRemoved(mFeed.size());
mAdapter.setLoaded();
mSwipeRefreshLayout.setRefreshing(false);
}
}
);
// for (int i = 1; i <= 20; i++) {
// studentList.add(new Student("Student " + i, "androidstudent" + i + "@gmail.com"));
//
// }
mSwipeRefreshLayout.setRefreshing(true);
}
@Override
public void onRefresh() {
mFeed.clear();
mAdapter.notifyDataSetChanged();
loadData(true);
currentPage=1;
}
}
请您参考如下方法:
put this line along with setting recyclerView. issue was fixed by setting ItemAnimator to null for RecyclerView.
在 Kotlin
recyclerView.layoutManager = LinearLayoutManager(this)
recyclerView.itemAnimator = null
在java中
recyclerView.setItemAnimator(null);
