Java RecyclerView中的项目在电话上重复，但logcat中没有错误？
我用recycler视图制作了一个视频播放器，它工作得很好，直到我稍微改变了布局，然后视图被复制，旧视图被滚动，新视图被挂起（没有滚动）。我尝试了Java RecyclerView中的项目在电话上重复，但logcat中没有错误？,java,android,android-recyclerview,Java,Android,Android Recyclerview,我用recycler视图制作了一个视频播放器，它工作得很好，直到我稍微改变了布局，然后视图被复制，旧视图被滚动，新视图被挂起（没有滚动）。我尝试了adapter.notifydatachanged（），但没有效果。我是一个初学者，我发现仍然很难理解错误，尤其是那些没有出现在logcat上的错误。我希望得到帮助 我的布局： <?xml version="1.0" encoding="utf-8"?> <androidx.constraint
adapter.notifydatachanged（）<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:keepScreenOn="true"
tools:context=".Activities.Dashboard">
<com.anisacoding.expriment.MainRecyclerView.VideoPlayerRecyclerView
android:id="@+id/recyclerview"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<FrameLayout
android:id="@+id/media_container"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" >
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<ImageView
android:id="@+id/thumbnail"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:contentDescription="@string/thumbnail"
android:scaleType="matrix"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ProgressBar
android:id="@+id/progressBar"
style="@style/Widget.AppCompat.ProgressBar.Horizontal"
android:layout_width="0dp"
android:layout_height="1.2dp"
android:indeterminate="true"
android:progressTint="@android:color/white"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.902" />
</androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.0" />
<ImageView
android:id="@+id/followBtn"
android:layout_width="52dp"
android:layout_height="40dp"
android:contentDescription="@string/add_follow"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.268"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.875"
android:src="@drawable/ic_follow_add"
app:tint="#FF0000" />
<include layout="@layout/bottom_navigation_view"/>
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.080" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.99" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.9015048" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.99270076" />
<ImageView
android:id="@+id/love_btn"
android:layout_width="38dp"
android:layout_height="36dp"
android:contentDescription="@string/love"
android:src="@drawable/ic_love"
app:layout_constraintBottom_toTopOf="@+id/guideline5"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.407"
app:layout_constraintStart_toStartOf="@+id/guideline4"
app:layout_constraintTop_toTopOf="@+id/guideline2"
app:layout_constraintVertical_bias="0.376" />
<TextView
android:id="@+id/lovers"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/lovenumber"
android:textColor="@android:color/white"
app:layout_constraintBottom_toTopOf="@+id/guideline6"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@+id/guideline4"
app:layout_constraintTop_toTopOf="@+id/guideline2" />
<ImageView
android:id="@+id/comments_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="@string/comments"
android:src="@drawable/ic_comments"
app:layout_constraintBottom_toTopOf="@+id/guideline6"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.52"
app:layout_constraintStart_toStartOf="@+id/guideline4"
app:layout_constraintTop_toTopOf="@+id/guideline2"
app:layout_constraintVertical_bias="0.58">
</ImageView>
<TextView
android:id="@+id/comments"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/lovenumber"
android:textColor="@android:color/white"
app:layout_constraintBottom_toTopOf="@+id/guideline6"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.448"
app:layout_constraintStart_toStartOf="@+id/guideline4"
app:layout_constraintTop_toTopOf="@+id/guideline2"
app:layout_constraintVertical_bias="0.661" />
<ImageView
android:id="@+id/share_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="@string/library_music"
android:src="@drawable/ic_share"
app:layout_constraintBottom_toTopOf="@+id/guideline6"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.512"
app:layout_constraintStart_toStartOf="@+id/guideline4"
app:layout_constraintTop_toTopOf="@+id/guideline2"
app:layout_constraintVertical_bias="0.765">
</ImageView>
<ImageView
android:id="@+id/music_library"
android:layout_width="35dp"
android:layout_height="35dp"
android:contentDescription="@string/library_music"
android:src="@drawable/ic_library_music"
app:layout_constraintBottom_toTopOf="@+id/guideline6"
app:layout_constraintEnd_toStartOf="@+id/guideline7"
app:layout_constraintHorizontal_bias="0.289"
app:layout_constraintStart_toStartOf="@+id/guideline4"
app:layout_constraintTop_toTopOf="@+id/guideline2"
app:layout_constraintVertical_bias="0.92" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.84" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.7633379" />
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/circleImageView"
android:layout_width="0dp"
android:layout_height="0dp"
android:src="@drawable/ic_profile"
app:layout_constraintBottom_toTopOf="@+id/guideline6"
app:layout_constraintEnd_toStartOf="@+id/guideline8"
app:layout_constraintHorizontal_bias="0.024"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline3"
app:layout_constraintVertical_bias="0.0"
app:layout_constraintWidth_percent=".2" />
<TextView
android:id="@+id/username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/username"
android:textColor="#FFFFFF"
app:layout_constraintBottom_toTopOf="@+id/guideline6"
app:layout_constraintEnd_toStartOf="@+id/guideline8"
app:layout_constraintHorizontal_bias="0.625"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline3"
app:layout_constraintVertical_bias="0.256" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.50121653" />
<ImageView
android:id="@+id/volumeControl"
android:layout_width="48dp"
android:layout_height="48dp"
android:alpha="0"
android:contentDescription="@string/thumbnail"
android:src="@drawable/ic_volume"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.954"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.168" />
</androidx.constraintlayout.widget.ConstraintLayout>
public class Dashboard extends AppCompatActivity {
private static final String TAG = "Dashboard";
private static final int ACTIVITY_NUM = 0;
private Context xContext = Dashboard.this;
private ArrayList<MediaObject> mediaObjectsList = new ArrayList<>();
private VideoPlayerRecyclerView recyclerview;
private static ApiInterface apiInterface;
private ImageView music_library;
private static final int CAMERA_PERMISSION_REQUEST_CODE = 88888;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.d(TAG, "onCreate: started.");
apiInterface = ApiClient.getApiClient().create(ApiInterface.class);
music_library = findViewById(R.id.music_library);
init();
setupBottomNavigationView();
music_library.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view) {
Intent intent = new Intent(Dashboard.this, SoundActivity.class);
startActivity(intent);
finish();
}
});
}
private void init(){
/////////recycler view////////
recyclerview = findViewById(R.id.recyclerview);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(RecyclerView.VERTICAL);
recyclerview.setLayoutManager(layoutManager);
layoutManager.setReverseLayout(true);
layoutManager.setStackFromEnd(true);
VerticalSpacingItemDecorator itemDecorator = new VerticalSpacingItemDecorator(0);
recyclerview.addItemDecoration(itemDecorator);
/////////
SnapHelper mSnapHelper = new PagerSnapHelper();
mSnapHelper.attachToRecyclerView(recyclerview);
///////////////
LoadPost();
}
private void LoadPost() {
Call<Users>call = apiInterface.performAllPosts();
call.enqueue(new Callback<Users>() {
@Override
public void onResponse(@NonNull Call <Users> call, @NonNull Response<Users> response) {
if (response.isSuccessful()){
mediaObjectsList = (ArrayList < MediaObject>) Objects.requireNonNull(response.body()).getAllPosts();
recyclerview.setMediaObjects(mediaObjectsList);
VideoPlayerRecyclerAdapter adapter = new VideoPlayerRecyclerAdapter(initGlide(), mediaObjectsList);
recyclerview.setAdapter(adapter);
recyclerview.setKeepScreenOn(true);
recyclerview.smoothScrollToPosition(mediaObjectsList.size()+1);
adapter.notifyDataSetChanged();
}
else {
Toast.makeText(Dashboard.this, "Network Error.", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onFailure(@NonNull Call <Users> call, @NonNull Throwable t) {
Toast.makeText(Dashboard.this, "Network Error.", Toast.LENGTH_SHORT).show();
}
});
}
private RequestManager initGlide() {
RequestOptions options = new RequestOptions().placeholder(R.color.colorAccent)
.error(R.color.red);
return Glide.with(this).setDefaultRequestOptions(options);
}
@Override
protected void onDestroy(){
if (recyclerview !=null)
recyclerview.releasePlayer();
super.onDestroy();
}
@Override
protected void onStop(){
super.onStop();
if (recyclerview !=null)
recyclerview.releasePlayer();
finish();
}
@Override
public void onBackPressed(){
super.onBackPressed();
finish();
}
/**
* BottomNavigationView setup
*/
private void setupBottomNavigationView(){
Log.d(TAG, "setupBottomNavigationView: setting up BottomNavigationView");
BottomNavigationView bottomNavigationView = findViewById(R.id.bottomNavViewBar);
BottomNavigationViewHelper.setupBottomNavigationView(bottomNavigationView);
BottomNavigationViewHelper.enableNavigation(xContext, bottomNavigationView);
Menu menu = bottomNavigationView.getMenu();
MenuItem menuItem = menu.getItem(ACTIVITY_NUM);
menuItem.setChecked(true);
}
@Override
protected void onResume() {
super.onResume();
checkPermission();
}
private void checkPermission() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
return;
}
// request camera permission if it has not been grunted.
if (checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED ||
checkSelfPermission(Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED ||
checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
) {
requestPermissions(new String[]{Manifest.permission.CAMERA, Manifest.permission.RECORD_AUDIO, Manifest.permission.WRITE_EXTERNAL_STORAGE}, CAMERA_PERMISSION_REQUEST_CODE);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case CAMERA_PERMISSION_REQUEST_CODE:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(Dashboard.this, "permission has been grunted.", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(Dashboard.this, "[WARN] permission is not grunted.", Toast.LENGTH_SHORT).show();
}
break;
}
}
}
公共类仪表板扩展了AppCompatActivity{
私有静态最终字符串TAG=“Dashboard”；
私有静态最终整数活动_NUM=0；
私有上下文xContext=Dashboard.this；
私有ArrayList mediaObjectsList=新ArrayList（）；
私人视频播放器recyclerview recyclerview；
专用静态接口；
私人ImageView音乐图书馆；
私人静态最终int摄像机\许可\请求\代码=88888；
@凌驾
创建时受保护的void（@Nullable Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
d（标记“onCreate:started”）；
apiInterface=ApiClient.getApiClient（）.create（apiInterface.class）；
music_library=findViewById（R.id.music_library）；
init（）；
setupBottomNavigationView（）；
music_library.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图）{
意向意向=新意向（Dashboard.this、SoundActivity.class）；
星触觉（意向）；
完成（）；
}
});
}
私有void init（）{
/////////回收者视图////////
recyclerview=findViewById（R.id.recyclerview）；
LinearLayoutManager layoutManager=新的LinearLayoutManager（此）；
layoutManager.setOrientation（RecyclerView.VERTICAL）；
recyclerview.setLayoutManager（layoutManager）；
layoutManager.setReverseLayout（true）；
layoutManager.setStackFromEnd（true）；
VerticalSpacingItemDecorator=新的VerticalSpacingItemDecorator（0）；
recyclerview.addItemDecoration（itemDecorator）；
/////////
SnapHelper mSnapHelper=新页面NapHelper（）；
mSnapHelper.attachToRecyclerView（recyclerview）；
///////////////
装载柱（）；
}
专用void LoadPost（）{
Callcall=apinterface.performAllPosts（）；
call.enqueue（新回调（）{
@凌驾
public void onResponse（@NonNull调用，@NonNull响应）{
if（response.issusccessful（））{
mediaObjectsList=（ArrayList）Objects.requireNonNull（response.body（））.getAllPosts（）；
setMediaObjects（mediaObjectsList）；
VideoPlayerRecyclerAdapter=新的VideoPlayerRecyclerAdapter（initGlide（），mediaObjectsList）；
recyclerview.setAdapter（适配器）；
recyclerview.setKeepScreenOn（true）；
recyclerview.smoothScrollToPosition（mediaObjectsList.size（）+1）；
adapter.notifyDataSetChanged（）；
}
否则{
Toast.makeText（Dashboard.this，“网络错误”，Toast.LENGTH_SHORT.show（）；
}
}
@凌驾
public void onFailure（@NonNull Call Call，@NonNull Throwable t）{
Toast.makeText（Dashboard.this，“网络错误”，Toast.LENGTH_SHORT.show（）；
}
});
}
私有请求管理器initGlide（）{
RequestOptions=newrequestoptions（）.placeholder（R.color.colorAccent）
.错误（R颜色为红色）；
返回Glide.with（this）.setDefaultRequestOptions（options）；
}
@凌驾
受保护的空onDestroy（）{
如果（recyclerview！=null）
recyclerview.releasePlayer（）；
super.ondestory（）；
}
@凌驾
受保护的void onStop（）{
super.onStop（）；
如果（recyclerview！=null）
recyclerview.releasePlayer（）；
完成（）；
}
@凌驾
public void onBackPressed（）{
super.onBackPressed（）；
完成（）；
}
/**
*底部导航视图设置
*/
私有void setupBottomNavigationView（）{
Log.d（标记“setupBottomNavigationView:setupBottomNavigationView”）；
BottomNavigationView BottomNavigationView=findViewById（R.id.bottomNavViewBar）；
setupBottomNavigationView（bottomNavigationView）；
启用导航（xContext，bottomNavigationView）；
Menu Menu=bottomNavigationView.getMenu（）；
MenuItem MenuItem=menu.getItem（活动数量）；
menuItem.setChecked（true）；
}
@凌驾
受保护的void onResume（）{
super.onResume（）；
checkPermission（）；
}
私有void checkPermission（）{
if（Build.VERSION.SDK_INTimport android.view.LayoutInflater;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.recyclerview.widget.RecyclerView;
import com.anisacoding.expriment.Model.MediaObject;
import com.anisacoding.expriment.R;
import com.bumptech.glide.RequestManager;
import com.anisacoding.expriment.MainRecyclerView.VideoPlayerViewHolder;
import java.util.ArrayList;
import java.util.List;
public class VideoPlayerRecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private ArrayList<MediaObject> mediaObjects;
private RequestManager requestManager;
public VideoPlayerRecyclerAdapter(RequestManager requestManager, ArrayList<MediaObject> mediaObjects) {
this.mediaObjects = mediaObjects;
this.requestManager = requestManager;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
return new com.anisacoding.expriment.MainRecyclerView.VideoPlayerViewHolder(
LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.activity_main, viewGroup, false));
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
((com.anisacoding.expriment.MainRecyclerView.VideoPlayerViewHolder) viewHolder).onBind(mediaObjects.get(i), requestManager);
}
@Override
public int getItemCount() {
return mediaObjects.size();
}
}