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Unable to initialize native ad inside recyclerview in androidX

I was trying to implement Admob native ads inside my recyclerView, And i ended with below error & i have also attached my code. i even followed Google Code Lab. Still i ended with multiple error.
How do i add native ad's between <Arraylist>.
FYI: i have minimized code to be readable.
MainActivity:
public class MainActivity extends AppCompatActivity {
public static final int NUMBER_OF_ADS = 5;
AdLoader adLoader;
#BindView(R.id.recyclerView) RecyclerView recyclerView;
ArrayList<VideoModel> arrayListVideos;
ArrayList<UnifiedNativeAd> nativeAds = new ArrayList<>();
private VideoAdapter videoAdapter;
private AdView mAdView;
private ShimmerFrameLayout shimmerFrameLayout;
private GridLayoutManager mLayoutManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int autoCardWith = DisplayUtils.calculateNoOfColumns(getApplicationContext());
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
adMob();
arrayListVideos = new ArrayList<>();
mLayoutManager = new GridLayoutManager(this, autoCardWith);
//mLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
// #Override
//public int getSpanSize(int position) { if (position % MainActivity.ITEMS_PER_AD == 0) { return autoCardWith; } return 1; }
//});
recyclerView.setHasFixedSize(true);
//recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setLayoutManager(new GridLayoutManager(this, autoCardWith));
recyclerView.setHasFixedSize(true);
shimmerFrameLayout = findViewById(R.id.shimmer_view);
shimmerFrameLayout.setVisibility(View.VISIBLE);
shimmerFrameLayout.startShimmer();
recyclerView.setVisibility(View.INVISIBLE);
askPermission();
displayAllVideos();
loadNativeAds();
}
private void loadNativeAds() {
AdLoader.Builder builder = new AdLoader.Builder(this,getResources().getString(R.string.native_ad_id));
adLoader = builder.forUnifiedNativeAd(new UnifiedNativeAd.OnUnifiedNativeAdLoadedListener() {
#Override
public void onUnifiedNativeAdLoaded(UnifiedNativeAd unifiedNativeAd) {
nativeAds.add(unifiedNativeAd);
if (!adLoader.isLoading()) {
insertAdsinMenuItem();
}
}
}).withAdListener(new AdListener() {
#Override
public void onAdFailedToLoad(int i) {
super.onAdFailedToLoad(i);
if (!adLoader.isLoading()) {
insertAdsinMenuItem();
}
}
}).build();
adLoader.loadAds(new AdRequest.Builder().build(),NUMBER_OF_ADS);
}
private void insertAdsinMenuItem() {
if (nativeAds.size() < 0 ){
return;
}
int offset = (arrayListVideos.size() / nativeAds.size() + 1 );
int index = 0;
for (UnifiedNativeAd ad:nativeAds){
arrayListVideos.add(index,ad);
index = index + offset;
}
}
private void adMob() {
MobileAds.initialize(this, new OnInitializationCompleteListener() {
#Override
public void onInitializationComplete(InitializationStatus initializationStatus) {
}
});
mAdView = findViewById(R.id.main_banner);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
}
private void askPermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && !Settings.canDrawOverlays(this)){
Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
Uri.parse("package:"+getPackageName()));
startActivityForResult(intent,2084);
}
}
private void displayAllVideos() {
Uri uri;
Cursor cursor;
int column_index_data,thum;
String absolutePathThumb;
uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
String[] projection = {MediaStore.MediaColumns.DATA, MediaStore.Video.Media.BUCKET_DISPLAY_NAME, MediaStore.Video.Media._ID,MediaStore.Video.Thumbnails.DATA};
final String orderBy = MediaStore.Video.Media.DEFAULT_SORT_ORDER;
cursor = getApplicationContext().getContentResolver().query(uri,projection,null,null,orderBy);
column_index_data = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
thum = cursor.getColumnIndexOrThrow(MediaStore.Video.Thumbnails.DATA);
while (cursor.moveToNext()){
Log.d("VIDEO", cursor.getString(0));
absolutePathThumb = cursor.getString(column_index_data);
Uri thumbUri = Uri.fromFile(new File(absolutePathThumb));
//String cursorThumb = cursor.getString(thum);
String fileName = FilenameUtils.getBaseName(absolutePathThumb);
String extension = FilenameUtils.getExtension(absolutePathThumb);
String duration = getDuration(absolutePathThumb);
VideoModel videoModel = new VideoModel();
videoModel.setDuration(duration);
videoModel.setVideo_uri(thumbUri.toString());
videoModel.setVideo_path(absolutePathThumb);
videoModel.setVideo_name(fileName);
videoModel.setVideo_thumb(cursor.getString(thum));
if (extension!=null){
videoModel.setVideo_extension(extension);
}else {
videoModel.setVideo_extension("mp4");
}
if (duration!=null){
videoModel.setDuration(duration);
}else {
videoModel.setDuration("00:00");
}
arrayListVideos.add(videoModel);
}
videoAdapter = new VideoAdapter(this,arrayListVideos);
shimmerFrameLayout.setVisibility(View.INVISIBLE);
shimmerFrameLayout.stopShimmer();
recyclerView.setVisibility(View.VISIBLE);
recyclerView.setAdapter(videoAdapter);
//set adapter
}
}
VideoAdapter:
public class VideoAdapter extends RecyclerView.Adapter<VideoAdapter.VideoAdapterViewHolder> implements Filterable {
private final int MENU_ITEM_VIEW_TYPE = 0;
private final int UNIFIED_NATIVE_AD_VIEW_TYPE = 1;
Context context;
ArrayList<VideoModel> arrayListVideo;
ArrayList<VideoModel> arrayListVideoAll;
private Activity mainActivity;
public VideoAdapter(Context context, ArrayList<VideoModel> arrayListVideos){
this.context = context;
this.arrayListVideo = arrayListVideos;
arrayListVideoAll = new ArrayList<>(arrayListVideo);
mainActivity = (Activity) context;
}
#NonNull
#Override
public VideoAdapterViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
switch (i){
case UNIFIED_NATIVE_AD_VIEW_TYPE:
View unifiedNativeLayoutView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.ad_unified,viewGroup,false);
return new UnifiedNativeAdViewHolder(unifiedNativeLayoutView);
case MENU_ITEM_VIEW_TYPE:
default:
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_videos,viewGroup,false);
return new VideoAdapterViewHolder(view);
}
}
#Override
public void onBindViewHolder(#NonNull VideoAdapterViewHolder videoAdapterViewHolder, int i) {
int viewType = getItemViewType(i);
switch (viewType){
case UNIFIED_NATIVE_AD_VIEW_TYPE:
UnifiedNativeAd unifiedNativeAd = (UnifiedNativeAd)arrayListVideo.get(i);
populateNativeAdView(unifiedNativeAd,((UnifiedNativeAdViewHolder)videoAdapterViewHolder).getAdView());
break;
case MENU_ITEM_VIEW_TYPE:
Glide.with(context).load(arrayListVideo.get(i).getVideo_thumb()).into(videoAdapterViewHolder.image);
videoAdapterViewHolder.name.setText(arrayListVideo.get(i).getVideo_name() + "." + arrayListVideo.get(i).getVideo_extension());
videoAdapterViewHolder.duration.setText(arrayListVideo.get(i).getDuration());
}
}
#Override
public int getItemCount() {
return arrayListVideo.size();
}
public class VideoAdapterViewHolder extends RecyclerView.ViewHolder{
public ImageView image;
public TextView name,duration;
public ImageView videoOption;
public VideoAdapterViewHolder(#NonNull View itemView) {
super(itemView);
if (!(itemView instanceof AdView)) {
image = (ImageView)itemView.findViewById(R.id.vid_image);
name = (TextView)itemView.findViewById(R.id.vid_name);
duration = (TextView)itemView.findViewById(R.id.vid_duration);
videoOption = (ImageView) itemView.findViewById(R.id.video_option);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
VideoModel videoModel = arrayListVideo.get(getAdapterPosition());
((MainActivity)context).openVideoPlayerActivity(videoModel);
}
});
videoOption.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
VideoModel videoModel = arrayListVideo.get(getAdapterPosition());
((MainActivity)context).VideoMoreOption(videoModel);
}
});
}
}
}
private void populateNativeAdView(UnifiedNativeAd unifiedNativeAd, UnifiedNativeAdView adView) {
((TextView)adView.getHeadlineView()).setText(unifiedNativeAd.getHeadline());
((TextView)adView.getBodyView()).setText(unifiedNativeAd.getBody());
((TextView)adView.getCallToActionView()).setText(unifiedNativeAd.getCallToAction());
NativeAd.Image icon = unifiedNativeAd.getIcon();
if (icon==null){
adView.getIconView().setVisibility(View.INVISIBLE);
}else {
((ImageView)adView.getIconView()).setImageDrawable(icon.getDrawable());
adView.getIconView().setVisibility(View.VISIBLE);
}
if(unifiedNativeAd.getPrice()==null){
adView.getPriceView().setVisibility(View.INVISIBLE);
}else {
adView.getPriceView().setVisibility(View.VISIBLE);
((TextView)adView.getPriceView()).setText(unifiedNativeAd.getPrice());
}
if(unifiedNativeAd.getStarRating()==null){
adView.getStarRatingView().setVisibility(View.INVISIBLE);
}else {
adView.getStarRatingView().setVisibility(View.VISIBLE);
((RatingBar)adView.getStarRatingView()).setRating(unifiedNativeAd.getStarRating().floatValue());
}
if(unifiedNativeAd.getAdvertiser()==null){
adView.getAdvertiserView().setVisibility(View.INVISIBLE);
}else {
adView.getAdvertiserView().setVisibility(View.VISIBLE);
((TextView)adView.getAdvertiserView()).setText(unifiedNativeAd.getAdvertiser());
}
adView.setNativeAd(unifiedNativeAd);
}
}

public class VideoAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements Filterable {
private final int MENU_ITEM_VIEW_TYPE = 0;
private final int UNIFIED_NATIVE_AD_VIEW_TYPE = 1;
Context context;
ArrayList<Object> arrayListVideo;
ArrayList<Object> arrayListVideoAll;
private Activity mainActivity;
public VideoAdapter(Context context, ArrayList<Object> arrayListVideos) {
this.context = context;
this.arrayListVideo = arrayListVideos;
arrayListVideoAll = new ArrayList<>(arrayListVideo);
mainActivity = (Activity) context;
}
#Override
public int getItemViewType(int position) {
if(arrayListVideo.get(position) instanceof VideoModel){
return MENU_ITEM_VIEW_TYPE;
} else{
return UNIFIED_NATIVE_AD_VIEW_TYPE;
}
}
#NonNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
switch (i) {
case UNIFIED_NATIVE_AD_VIEW_TYPE:
View unifiedNativeLayoutView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.ad_unified, viewGroup, false);
return new UnifiedNativeAdViewHolder(unifiedNativeLayoutView);
case MENU_ITEM_VIEW_TYPE:
default:
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_videos, viewGroup, false);
return new VideoAdapterViewHolder(view);
}
}
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder viewHolder, int i) {
switch (viewHolder.getItemViewType()) {
case UNIFIED_NATIVE_AD_VIEW_TYPE:
UnifiedNativeAd unifiedNativeAd = (UnifiedNativeAd) arrayListVideo.get(i);
populateNativeAdView(unifiedNativeAd, ((UnifiedNativeAdViewHolder) viewHolder).getAdView());
break;
case MENU_ITEM_VIEW_TYPE:
final VideoAdapterViewHolder videoAdapterViewHolder = (VideoAdapterViewHolder) viewHolder;
final VideoModel item = (VideoModel) arrayListVideo.get(i);
Glide.with(context).load(item.getVideo_thumb()).into(videoAdapterViewHolder.image);
videoAdapterViewHolder.name.setText(item.getVideo_name() +
"." + item.getVideo_extension());
videoAdapterViewHolder.duration.setText(item.getDuration());
}
}
#Override
public int getItemCount() {
return arrayListVideo.size();
}
#Override
public Filter getFilter() {
return null;
}
public class VideoAdapterViewHolder extends RecyclerView.ViewHolder {
public ImageView image;
public TextView name, duration;
public ImageView videoOption;
public VideoAdapterViewHolder(#NonNull View itemView) {
super(itemView);
if (!(itemView instanceof AdView)) {
image = (ImageView) itemView.findViewById(R.id.vid_image);
name = (TextView) itemView.findViewById(R.id.vid_name);
duration = (TextView) itemView.findViewById(R.id.vid_duration);
videoOption = (ImageView) itemView.findViewById(R.id.video_option);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
VideoModel videoModel = (VideoModel) arrayListVideo.get(getAdapterPosition());
((MainActivity) context).openVideoPlayerActivity(videoModel);
}
});
videoOption.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
VideoModel videoModel = (VideoModel) arrayListVideo.get(getAdapterPosition());
((MainActivity) context).VideoMoreOption(videoModel);
}
});
}
}
}
private void populateNativeAdView(UnifiedNativeAd unifiedNativeAd, UnifiedNativeAdView adView) {
((TextView) adView.getHeadlineView()).setText(unifiedNativeAd.getHeadline());
((TextView) adView.getBodyView()).setText(unifiedNativeAd.getBody());
((TextView) adView.getCallToActionView()).setText(unifiedNativeAd.getCallToAction());
NativeAd.Image icon = unifiedNativeAd.getIcon();
if (icon == null) {
adView.getIconView().setVisibility(View.INVISIBLE);
} else {
((ImageView) adView.getIconView()).setImageDrawable(icon.getDrawable());
adView.getIconView().setVisibility(View.VISIBLE);
}
if (unifiedNativeAd.getPrice() == null) {
adView.getPriceView().setVisibility(View.INVISIBLE);
} else {
adView.getPriceView().setVisibility(View.VISIBLE);
((TextView) adView.getPriceView()).setText(unifiedNativeAd.getPrice());
}
if (unifiedNativeAd.getStarRating() == null) {
adView.getStarRatingView().setVisibility(View.INVISIBLE);
} else {
adView.getStarRatingView().setVisibility(View.VISIBLE);
((RatingBar) adView.getStarRatingView()).setRating(unifiedNativeAd.getStarRating().floatValue());
}
if (unifiedNativeAd.getAdvertiser() == null) {
adView.getAdvertiserView().setVisibility(View.INVISIBLE);
} else {
adView.getAdvertiserView().setVisibility(View.VISIBLE);
((TextView) adView.getAdvertiserView()).setText(unifiedNativeAd.getAdvertiser());
}
adView.setNativeAd(unifiedNativeAd);
}
}
MainActivity
public class MainActivity extends AppCompatActivity {
public static final int NUMBER_OF_ADS = 5;
AdLoader adLoader;
#BindView(R.id.recyclerView)
RecyclerView recyclerView;
ArrayList<Object> arrayListVideos;
ArrayList<UnifiedNativeAd> nativeAds = new ArrayList<>();
private VideoAdapter videoAdapter;
private AdView mAdView;
private ShimmerFrameLayout shimmerFrameLayout;
private GridLayoutManager mLayoutManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int autoCardWith = DisplayUtils.calculateNoOfColumns(getApplicationContext());
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
adMob();
arrayListVideos = new ArrayList<>();
mLayoutManager = new GridLayoutManager(this, autoCardWith);
//mLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
// #Override
//public int getSpanSize(int position) { if (position % MainActivity.ITEMS_PER_AD == 0) { return autoCardWith; } return 1; }
//});
recyclerView.setHasFixedSize(true);
//recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setLayoutManager(new GridLayoutManager(this, autoCardWith));
recyclerView.setHasFixedSize(true);
shimmerFrameLayout = findViewById(R.id.shimmer_view);
shimmerFrameLayout.setVisibility(View.VISIBLE);
shimmerFrameLayout.startShimmer();
recyclerView.setVisibility(View.INVISIBLE);
askPermission();
displayAllVideos();
loadNativeAds();
}
private void loadNativeAds() {
AdLoader.Builder builder = new AdLoader.Builder(this,getResources().getString(R.string.native_ad_id));
adLoader = builder.forUnifiedNativeAd(new UnifiedNativeAd.OnUnifiedNativeAdLoadedListener() {
#Override
public void onUnifiedNativeAdLoaded(UnifiedNativeAd unifiedNativeAd) {
nativeAds.add(unifiedNativeAd);
if (!adLoader.isLoading()) {
insertAdsinMenuItem();
}
}
}).withAdListener(new AdListener() {
#Override
public void onAdFailedToLoad(int i) {
super.onAdFailedToLoad(i);
if (!adLoader.isLoading()) {
insertAdsinMenuItem();
}
}
}).build();
adLoader.loadAds(new AdRequest.Builder().build(),NUMBER_OF_ADS);
}
private void insertAdsinMenuItem() {
if (nativeAds.size() < 0 ){
return;
}
int offset = (arrayListVideos.size() / nativeAds.size() + 1 );
int index = 0;
for (UnifiedNativeAd ad:nativeAds){
arrayListVideos.add(index,ad);
index = index + offset;
}
}
private void adMob() {
MobileAds.initialize(this, new OnInitializationCompleteListener() {
#Override
public void onInitializationComplete(InitializationStatus initializationStatus) {
}
});
mAdView = findViewById(R.id.main_banner);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
}
private void askPermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && !Settings.canDrawOverlays(this)){
Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
Uri.parse("package:"+getPackageName()));
startActivityForResult(intent,2084);
}
}
private void displayAllVideos() {
Uri uri;
Cursor cursor;
int column_index_data,thum;
String absolutePathThumb;
uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
String[] projection = {MediaStore.MediaColumns.DATA, MediaStore.Video.Media.BUCKET_DISPLAY_NAME, MediaStore.Video.Media._ID,MediaStore.Video.Thumbnails.DATA};
final String orderBy = MediaStore.Video.Media.DEFAULT_SORT_ORDER;
cursor = getApplicationContext().getContentResolver().query(uri,projection,null,null,orderBy);
column_index_data = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
thum = cursor.getColumnIndexOrThrow(MediaStore.Video.Thumbnails.DATA);
while (cursor.moveToNext()){
Log.d("VIDEO", cursor.getString(0));
absolutePathThumb = cursor.getString(column_index_data);
Uri thumbUri = Uri.fromFile(new File(absolutePathThumb));
//String cursorThumb = cursor.getString(thum);
String fileName = FilenameUtils.getBaseName(absolutePathThumb);
String extension = FilenameUtils.getExtension(absolutePathThumb);
String duration = getDuration(absolutePathThumb);
VideoModel videoModel = new VideoModel();
videoModel.setDuration(duration);
videoModel.setVideo_uri(thumbUri.toString());
videoModel.setVideo_path(absolutePathThumb);
videoModel.setVideo_name(fileName);
videoModel.setVideo_thumb(cursor.getString(thum));
if (extension!=null){
videoModel.setVideo_extension(extension);
}else {
videoModel.setVideo_extension("mp4");
}
if (duration!=null){
videoModel.setDuration(duration);
}else {
videoModel.setDuration("00:00");
}
arrayListVideos.add(videoModel);
}
videoAdapter = new VideoAdapter(this,arrayListVideos);
shimmerFrameLayout.setVisibility(View.INVISIBLE);
shimmerFrameLayout.stopShimmer();
recyclerView.setVisibility(View.VISIBLE);
recyclerView.setAdapter(videoAdapter);
//set adapter
}
}

How to get size of a particular variable from Model class in Android?

I have a model class:
public class Home_Model_ViewPager {
public String buttonLink;
public String tipsDescription;
public String tipsButton;
public Context context;
public Home_Model_ViewPager( Context context, String tipsDescription, String tipsButton, String buttonLink) {
this.context = context;
this.tipsDescription = tipsDescription;
this.tipsButton = tipsButton;
this.buttonLink = buttonLink;
}
public String getButtonLink() {
return buttonLink;
}
public void setButtonLink(String buttonLink) {
this.buttonLink = buttonLink;
}
public String getTipsDescription() {
return tipsDescription;
}
public void setTipsDescription(String tipsDescription) {
this.tipsDescription = tipsDescription;
}
public String getTipsButton() {
return tipsButton;
}
public void setTipsButton(String tipsButton) {
this.tipsButton = tipsButton;
}
}
I have used this model class to use it in viewpager adapter.
So, I am using a recyclerview and setting data to it. Now I have a problem that I have a viewpager in recycleritem. I want to return the size of viewpager adapter of any element in Home_Model_ViewPager as each element has diff size.
This is what I tried in ViewPagerAdapter:
public class ViewPagerAdapter extends PagerAdapter {
// Declare Variables
Context context;
LayoutInflater inflater;
List<Home_Model_ViewPager> totalList;
public ViewPagerAdapter(Context context, List<Home_Model_ViewPager> totalList) {
this.context = context;
this.totalList = totalList;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return totalList.size();
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
#Override
public Object instantiateItem(ViewGroup container, final int position) {
// Declare Variables
TextView tricksDescription;
Button tricksButton;
View itemView = inflater.inflate(R.layout.viewpager_item, container,
false);
tricksDescription = itemView.findViewById(R.id.xtv_tricks_description);
tricksButton = itemView.findViewById(R.id.tricks_button);
tricksDescription.setText(Html.fromHtml(totalList.get(position).getTipsDescription()));
tricksButton.setText(Html.fromHtml(totalList.get(position).getTipsButton()));
tricksButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
try {
Intent intent = new Intent(Intent.ACTION_VIEW);
String url = totalList.get(position).getButtonLink();
intent.setData(Uri.parse(url));
startActivity(intent);
}
catch (Exception e) {
e.printStackTrace();
}
}
});
container.addView(itemView);
return itemView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
View view = (View) object;
container.removeView(view);
}
}
I am using volley to get the values as JSON..
private void Home() {
try {
if (getActivity()!=null)
Commonfunctions.LoadPreferences(getActivity());
System.out.println("Authtoken:" + Commonfunctions.Token_key);
appservice.View_All_Events(Commonfunctions.Token_key, String.valueOf(pagenumber), new Server_Callback() {
#Override
public void onSuccess(String response) {
System.out.println("HOME Response :" + response);
try {
JSONObject signObject = new JSONObject(response);
String resStatus = signObject.getString(AppConstants.STATUS);
String resCode = signObject.getString(AppConstants.CODE);
String resMsg = signObject.getString(AppConstants.MSG);
if (resCode.equals(AppConstants.SUCCESS_CODE)) {
JSONArray allEvents = signObject.getJSONArray("all");
System.out.println("INNER Response :" + allEvents);
for (int i = 0; i < allEvents.length(); i++) {
JSONObject innerObj1 = allEvents.getJSONObject(i);
String backgroundImg = innerObj1.getString("backg_img");
String declinedCount = innerObj1.getString("decli_count");
String acceptedCount = innerObj1.getString("accep_count");
String invitedCount = innerObj1.getString("invi_count");
String messages = innerObj1.getString("i_chat");
String name = innerObj1.getString("name");
String eventTime = innerObj1.getString("duration");
String userPhoto = innerObj1.getString("photo");
JSONArray viewpagerEvents = innerObj1.getJSONArray("action");
for (int u = 0; u < viewpagerEvents.length(); u++) {
JSONObject innerObj3 = viewpagerEvents.getJSONObject(u);
String buttonText = innerObj3.getString("text");
String tipsDesc = innerObj3.getString("action_text");
String buttonLink = innerObj3.getString("button_link");
final Home_Model home_data = new Home_Model(name, messages,invitedCount,declinedCount,acceptedCount,eventTime,
userPhoto,backgroundImg);
data.add(home_data);
final Home_Model_ViewPager home_viewpager = new Home_Model_ViewPager(getContext(),tipsDesc,buttonText, buttonLink);
viewPagerData.add(home_viewpager);
}
}
adapter = new HomeAdapter(getContext(),data);
pagerAdapter = new ViewPagerAdapter(getActivity(), viewPagerData);
home_recycler.setAdapter(adapter);
adapter.notifyDataSetChanged();
if (adapter.getItemCount()==0) {
noeventLayout.setVisibility(View.VISIBLE);
}
else {
noeventLayout.setVisibility(View.GONE);
}
} else if (resCode.equals(AppConstants.UPDATE_CODE)) {
//Version_Update versionUpdate=new Version_Update(SignIn.this,response);
} else {
getActivity().getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);
Commonfunctions.showerrorsnackbar(resMsg, getActivity(), parentLayout);
}
} catch (JSONException e) {
e.printStackTrace();
}
}//on success close
});//server callback closed
} catch (Exception e) {
e.printStackTrace();
}
}
HomeAdapter:
class HomeAdapter extends RecyclerView.Adapter<HomeAdapter.ViewHolder> {
Context context;
List<Home_Model> students;
public HomeAdapter(Context context,List<Home_Model> students) {
this.context = context;
this.students = students;
}
#Override
public HomeAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.event_home_list, viewGroup, false);
return new HomeAdapter.ViewHolder(view);
}
#Override
public void onBindViewHolder(final HomeAdapter.ViewHolder holder, final int position) {
holder.title.setText(students.get(position).getName());
holder.invited.setText(students.get(position).getInvited());
holder.accepted.setText(students.get(position).getAccept());
holder.declined.setText(students.get(position).getDecline());
holder.eventTime.setText(students.get(position).getEvent_time());
holder.messages.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(getActivity(),Chat_view.class));
}
});
holder.viewPager.setAdapter(pagerAdapter);
holder.dots = new ImageView[holder.dotsCount];
for (int i = 0; i < holder.dotsCount; i++) {
holder.dots[i] = new ImageView(context);
holder.dots[i].setImageDrawable(ContextCompat.getDrawable(context, R.drawable.ic_dot_gray ));
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(8, 0, 8, 0);
holder.sliderDots.addView(holder.dots[i], params);
}
holder.dots[0].setImageDrawable(ContextCompat.getDrawable(context, R.drawable.ic_dot_colorprimary));
holder.viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
for (int i = 0; i < holder.dotsCount; i++) {
holder.dots[i].setImageDrawable(ContextCompat.getDrawable(context, R.drawable.ic_dot_gray));
}
holder.dots[position].setImageDrawable(ContextCompat.getDrawable(context, R.drawable.ic_dot_colorprimary));
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
if (students.get(position).getMessages().contentEquals("false")) {
holder.status.setVisibility(View.INVISIBLE);
}
else {
holder.status.setVisibility(View.VISIBLE);
}
holder.status.setVisibility(View.INVISIBLE);
try {
Glide.with(getActivity()).load(students.get(position).getProimg()).into(holder.pro_img);
Glide.with(getActivity()).load(students.get(position).getBgimg()).into(holder.card_main);
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public int getItemCount() {
return students.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView title, messages, invited, accepted, declined, eventTime;
private PorterShapeImageView pro_img;
ImageView card_main, status;
ViewPager viewPager;
LinearLayout sliderDots;
private ImageView[] dots;
private int dotsCount;
public ViewHolder(View itemView) {
super(itemView);
title = itemView.findViewById(R.id.xtv_welcome);
messages = itemView.findViewById(R.id.xtv_message);
invited = itemView.findViewById(R.id.xtv_invited);
accepted = itemView.findViewById(R.id.xtv_accepted);
declined = itemView.findViewById(R.id.xtv_decline);
eventTime = itemView.findViewById(R.id.contact_number);
pro_img = itemView.findViewById(R.id.pro_pic);
card_main = itemView.findViewById(R.id.card_main);
status = itemView.findViewById(R.id.incoming_image);
viewPager = itemView.findViewById(R.id.viewPagerTips);
sliderDots = itemView.findViewById(R.id.sliderDots);
dotsCount = pagerAdapter.getCount();
}
}
}

Please try to make one different array list for your viewpager's adapter:
ArrayList<Home_Model_ViewPager> tempList = new ArrayList<>();
for(int k=0;k<viewpagerData.size();k++){
Home_Model_ViewPager object = viewPagerData.get(k);
if(object.getTripDesc()!=null && object.getTripDesc().length() >0){
tempList.add(object);
}
}
ViewPagerAdapter pagerAdapter = new ViewPagerAdapter(getActivity(), tempList);
home_recycler.setAdapter(adapter);
adapter.notifyDataSetChanged();

Getting a RecyclerView to reload items

I am currently working on an app, that finds all MP3s on a users phone and then puts them into a list. This works very fine and is very quick, even with many songs. Now I populate a new list with an object for each item of the list to then display it inside my recyclerview. The problem is, that I have 700+ songs on my phone and this blocks the UI thread quite some time.
Now, I want to use the recyclerview to not load all items from the list into the objects all at once but rather only when they are about to be displayed - but I have NO clue over how to do this. Right now, all objects are build and then displayed in a very long scrollview from the recyclerview after the UI thread has been blocked for a good 30 seconds. Can please anyone help me? Here is my code:
namespace Media_Player
{
[Activity(Label = "Media_Player", MainLauncher = true)]
public class MainActivity : Activity
{
static public MediaPlayer mediaPlayer;
List<MP3object> mp3;
MediaMetadataRetriever reader;
public static Button btn_StartOrPause, btn_Stop;
public static TextView txt_CurrentSong;
public static bool stopIsActive = false, firstStart = true;
public static Android.Net.Uri CurrentActiveSongUri;
RecyclerView mRecyclerView;
RecyclerView.LayoutManager mLayoutManager;
PhotoAlbumAdapter mAdapter;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.test);
reader = new MediaMetadataRetriever();
PopulateMP3List(ReturnPlayableMp3(true));
mediaPlayer = new MediaPlayer();
InitRecView();
}
private void InitRecView()
{
// Instantiate the adapter and pass in its data source:
mAdapter = new PhotoAlbumAdapter(mp3);
// Get our RecyclerView layout:
mRecyclerView = FindViewById<RecyclerView>(Resource.Id.recyclerView);
// Plug the adapter into the RecyclerView:
mRecyclerView.SetAdapter(mAdapter);
mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.SetLayoutManager(mLayoutManager);
}
private void PopulateMP3List(List<string> content)
{
mp3 = new List<MP3object>();
foreach (string obj in content)
{
WriteMetaDataToFileList(obj);
}
}
void WriteMetaDataToFileList(string obj)
{
reader.SetDataSource(obj);
//Write Mp3 as object to global list
MP3object ob = new MP3object();
{
if(reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyTitle) != "" && reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyTitle) != null)
{
ob.SongName = reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyTitle);
}
else
{
ob.SongName = Resources.GetString(Resource.String.Unknown);
}
if (reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyArtist) != "" && reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyArtist) != null)
{
ob.ArtistName = reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyArtist);
}
else
{
ob.ArtistName = Resources.GetString(Resource.String.Unknown);
}
if (reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyAlbum) != "" && reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyAlbum) != null)
{
ob.AlbumName = reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyAlbum);
}
else
{
ob.AlbumName = Resources.GetString(Resource.String.Unknown);
}
if (reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyYear) != "" && reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyYear) != null)
{
ob.Year = reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyYear);
}
else
{
ob.Year = Resources.GetString(Resource.String.Unknown);
}
if (reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyYear) != "" && reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyYear) != null)
{
ob.Year = reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyYear);
}
else
{
ob.Year = Resources.GetString(Resource.String.Unknown);
}
ob.Mp3Uri = obj; // can never be unknown!
ob.DurationInSec = int.Parse(reader.ExtractMetadata(MediaMetadataRetriever.MetadataKeyDuration)) / 1000; // can never be unknown, div by 1000 to get sec not millis
}
mp3.Add(ob);
}
public List<string> ReturnPlayableMp3(bool sdCard)
{
List<string> res = new List<string>();
string phyle;
string path1 = null;
if(sdCard) // get mp3 from SD card
{
string baseFolderPath = "";
try
{
bool getSDPath = true;
Context context = Application.Context;
Java.IO.File[] dirs = context.GetExternalFilesDirs(null);
foreach (Java.IO.File folder in dirs)
{
bool IsRemovable = Android.OS.Environment.InvokeIsExternalStorageRemovable(folder);
bool IsEmulated = Android.OS.Environment.InvokeIsExternalStorageEmulated(folder);
if (getSDPath ? IsRemovable && !IsEmulated : !IsRemovable && IsEmulated)
baseFolderPath = folder.Path;
}
}
catch (Exception ex)
{
Console.WriteLine("GetBaseFolderPath caused the following exception: {0}", ex);
}
string xy = baseFolderPath.Remove(18); // This is result after this, but this hard coded solution could be a problem on different phones.: "/storage/05B6-2226/Android/data/Media_Player.Media_Player/files"
path1 = xy;
// path to SD card and MUSIC "/storage/05B6-2226/"
}
else // get Mp3 from internal storage
{
path1 = Android.OS.Environment.ExternalStorageDirectory.ToString();
}
var mp3Files = Directory.EnumerateFiles(path1, "*.mp3", SearchOption.AllDirectories);
foreach (string currentFile in mp3Files)
{
phyle = currentFile;
res.Add(phyle);
}
return res;
}
}
public class PhotoViewHolder : RecyclerView.ViewHolder
{
public ImageView Image { get; private set; }
public TextView Caption { get; private set; }
public PhotoViewHolder(View itemView) : base(itemView)
{
// Locate and cache view references:
Image = itemView.FindViewById<ImageView>(Resource.Id.imageView);
Caption = itemView.FindViewById<TextView>(Resource.Id.textView);
}
}
public class PhotoAlbumAdapter : RecyclerView.Adapter
{
public List<MP3object> mp3;
public PhotoAlbumAdapter(List<MP3object> mp3)
{
this.mp3 = mp3;
}
public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
{
View itemView = LayoutInflater.From(parent.Context).
Inflate(Resource.Layout.lay, parent, false);
PhotoViewHolder vh = new PhotoViewHolder(itemView);
return vh;
}
public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
{
PhotoViewHolder vh = holder as PhotoViewHolder;
vh.Caption.Text = mp3[position].SongName;
}
public override int ItemCount
{
get { return mp3.Count(); }
}
}
}
So getting the list of strings with the locations of the Mp3 works very quickly, but then "WriteMetaDataToFileList(obj)" kicks in, comming from "PopulateMP3List(List content)" and this is what takes so long. What I think I need is for the recyclerview to only build the first 20 objects, and when the user starts scrolling, builds the next 20 objects and attaches them to list for them to also be scrolled. Please help me out here :)

Here is an abstract class:
public abstract class PaginationScrollListener extends RecyclerView.OnScrollListener {
private LinearLayoutManager linearLayoutManager;
protected PaginationScrollListener(LinearLayoutManager linearLayoutManager) {
this.linearLayoutManager = linearLayoutManager;
}
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int visibleItemCount = linearLayoutManager.getChildCount();
int totalItemCount = linearLayoutManager.getItemCount();
int firstVisibleItemPosition = linearLayoutManager.findFirstVisibleItemPosition();
if (!isLoading() && !isLastPage()) {
if ((visibleItemCount + firstVisibleItemPosition) >= totalItemCount && firstVisibleItemPosition >= 0) {
loadMoreItems();
}
}
}
protected abstract void loadMoreItems();
public abstract boolean isLastPage();
public abstract boolean isLoading();
}
and In your adapter you must follow this pattern:
public class ConsultancyAdapter extends RecyclerView.Adapter<ConsultancyAdapter.ConsultancyVH> {
private static final int ITEM = 0;
private static final int LOADING = 1;
private boolean isLoadingAdded = false;
public ConsultancyAdapter(List<Consultancy> consultancies, ConsultancyAdapterListener listener) {
}
#NonNull
#Override
public ConsultancyVH onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
RecyclerView.ViewHolder viewHolder = null;
LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
switch (viewType) {
case ITEM:
viewHolder = getViewHolder(parent, layoutInflater);
break;
case LOADING:
View v2 = layoutInflater.inflate(R.layout.item_progress, parent, false);
viewHolder = new ConsultancyVH(v2);
break;
}
return (ConsultancyVH) viewHolder;
}
#NonNull
private RecyclerView.ViewHolder getViewHolder(ViewGroup parent, LayoutInflater inflater) {
RecyclerView.ViewHolder viewHolder;
View v1 = inflater.inflate(R.layout.item_consultancy, parent, false);
viewHolder = new ConsultancyVH(v1);
return viewHolder;
}
#Override
public void onBindViewHolder(#NonNull ConsultancyVH holder, int position) {
Consultancy consultancy = consultancies.get(position);
switch (getItemViewType(position)) {
case ITEM:
ConsultancyVH mySingeCounseller = holder;
holder.title.setText(consultancy.getTitle()); // set cardTitle
holder.fieldArea.setText(consultancy.getField_filedoctorskills());
break;
case LOADING:
break;
}
}
#Override
public int getItemCount() {
return consultancies.size();
}
#Override
public int getItemViewType(int position) {
return (position == consultancies.size() - 1 && isLoadingAdded) ? LOADING : ITEM;
}
public void add(Consultancy mc) {
consultancies.add(mc);
notifyItemInserted(consultancies.size() - 1);
}
public void addAll(List<Consultancy> mcList) {
for (Consultancy mc : mcList) {
add(mc);
}
}
public void remove(Consultancy city) {
int position = consultancies.indexOf(city);
if (position > -1) {
consultancies.remove(position);
notifyItemRemoved(position);
}
}
public Consultancy getItem(int position) {
return consultancies.get(position);
}
public void clear() {
isLoadingAdded = false;
while (getItemCount() > 0) {
remove(getItem(0));
}
}
public boolean isEmpty() {
return getItemCount() == 0;
}
public void addLoadingFooter() {
isLoadingAdded = true;
add(new Consultancy());
}
public void removeLoadingFooter() {
isLoadingAdded = false;
int position = consultancies.size() - 1;
Consultancy item = getItem(position);
if (item != null) {
consultancies.remove(position);
notifyItemRemoved(position);
}
}
public interface ConsultancyAdapterListener {
void onCaseClicked(int position, String nid, String fieldArea, String title);
}
protected class ConsultancyVH extends RecyclerView.ViewHolder {
private TextView title, fieldArea;
private CircleImageView iconProfile;
private MaterialRippleLayout caseButtonRipple;
public ConsultancyVH(View itemView) {
super(itemView);
caseButtonRipple = itemView.findViewById(R.id.case_button_ripple);
this.title = itemView.findViewById(R.id.docName);
this.fieldArea = itemView.findViewById(R.id.fieldArea);
this.iconProfile = itemView.findViewById(R.id.icon_profile);
}
}
}
and in your activity:
private void setScrollListener() {
recyclerView.addOnScrollListener(new PaginationScrollListener(linearLayoutManager) {
#Override
protected void loadMoreItems() {
isLoading = true;
currentPage += 1;
loadNextPage();
}
#Override
public boolean isLastPage() {
return isLastPage;
}
#Override
public boolean isLoading() {
return isLoading;
}
});
loadFirstPage();
}
and in my loadFirstPage i talk to a API and you need some your code:
private void loadFirstPage() {
CallData().enqueue(new DefaultRetrofitCallback<List<Consultancy>>() {
#Override
protected void onFailure(Throwable t) {
super.onFailure(t);
}
#Override
protected void onSuccess(List<Consultancy> response) {
swipeRefreshLayout.setRefreshing(false);
dataList = response;
adapter.addAll(dataList);
recyclerView.setAdapter(adapter);
if (!checkLast(response)) adapter.addLoadingFooter();
else isLastPage = true;
}
#Override
protected void onOtherStatus(Response<List<Consultancy>> response) {
super.onOtherStatus(response);
}
#Override
protected void always() {
super.always();
}
});
}
and loadNextPage:
private void loadNextPage() {
CallData().enqueue(new DefaultRetrofitCallback<List<Consultancy>>() {
#Override
protected void onFailure(Throwable t) {
super.onFailure(t);
}
#Override
protected void onSuccess(List<Consultancy> response) {
swipeRefreshLayout.setRefreshing(false);
adapter.removeLoadingFooter();
isLoading = false;
swipeRefreshLayout.setRefreshing(false);
adapter.addAll(response);
if (!checkLast(response)) adapter.addLoadingFooter();
else isLastPage = true;
}
#Override
protected void onOtherStatus(Response<List<Consultancy>> response) {
super.onOtherStatus(response);
}
#Override
protected void always() {
super.always();
}
});
}

Un-filtering the result is not working in Recyclerview

I have a recyclerview with some data and I have a searchview, and filter is working just fine. But un-filtering not working. I can't get the whole data in the recyclerview after un-filter. No data is showing. I have to re-open the activity to get data. I tried to used two data sets. But i have no idea where to use them.
My Fragment.
public class YourDealerListFragment extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private static final String STATE_DEALER_LIST = "state_dealer_list";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private VollySingleton vollySingleton;
private RequestQueue requestQueue;
private RecyclerView recyclerView;
private DealerListAdapter dlAdapter;
private HashMap<String, String> hashMap;
private ArrayList<SuggestGetSet> dealerList = new ArrayList<>();
private ArrayList<SuggestGetSet> filteredDealerList = new ArrayList<>();
private String repNo;
private StaggeredGridLayoutManager staggeredGridLayoutManager;
private GridMenuFragment mGridMenuFragment;
private Toolbar toolbar;
private ItemSorter itemSorter;
private Button sortButton;
private SearchView searchView;
private ProgressView progressView;
public static List<String> disChannel;
public YourDealerListFragment() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* #param param1 Parameter 1.
* #param param2 Parameter 2.
* #return A new instance of fragment YourDealerListFragment.
*/
// TODO: Rename and change types and number of parameters
public static YourDealerListFragment newInstance(String param1, String param2) {
YourDealerListFragment fragment = new YourDealerListFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
vollySingleton = VollySingleton.getsInstance();
requestQueue = vollySingleton.getmRequestQueue();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_your_dealer_list, container, false);
recyclerView = (RecyclerView) view.findViewById(R.id.dealerListRecyclerView);
progressView = (ProgressView) view.findViewById(R.id.pViewew);
itemSorter = new ItemSorter();
dlAdapter = new DealerListAdapter();
disChannel = new ArrayList<String>();
repNo = UserLogIn.getRepNo();
if (savedInstanceState != null) {
dealerList = savedInstanceState.getParcelableArrayList(STATE_DEALER_LIST);
dlAdapter.setDealertList(dealerList);
} else {
getJsonRequest();
}
final FrameLayout frameLayout = (FrameLayout) view.findViewById(R.id.frame_layout);
frameLayout.getBackground().setAlpha(0);
final FloatingActionsMenu fabMenu = (FloatingActionsMenu) view.findViewById(R.id.fab_menu);
final FloatingActionButton fabName = (FloatingActionButton) view.findViewById(R.id.fab_name);
final FloatingActionButton fabCollection = (FloatingActionButton) view.findViewById(R.id.fab_collection);
fabName.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
onSortByName();
fabMenu.collapse();
}
});
fabMenu.setOnFloatingActionsMenuUpdateListener(new FloatingActionsMenu.OnFloatingActionsMenuUpdateListener() {
#Override
public void onMenuExpanded() {
frameLayout.getBackground().setAlpha(240);
frameLayout.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
fabMenu.collapse();
return true;
}
});
}
#Override
public void onMenuCollapsed() {
frameLayout.getBackground().setAlpha(0);
frameLayout.setOnTouchListener(null);
}
});
searchView = (SearchView) view.findViewById(R.id.dealerNameSearchView);
searchView.setOnQueryTextListener(listener);
//custom context menu
mGridMenuFragment = GridMenuFragment.newInstance(R.drawable.background);
setupGridMenu();
mGridMenuFragment.setOnClickMenuListener(new GridMenuFragment.OnClickMenuListener() {
#Override
public void onClickMenu(GridMenu gridMenu, int position) {
switch (position) {
case 0:
Intent intent = new Intent(getActivity(), SelectItem.class);
getActivity().finish();
startActivity(intent);
getActivity();
break;
}
}
});
//dealers' recycler view item click
recyclerView.addOnItemTouchListener(new NavigationDrawerFragment.RecycleTouchListner(getActivity(), recyclerView, new NavigationDrawerFragment.ClickListener() {
#Override
public void onClick(View view, int position) {
FragmentTransaction tx = getActivity().getSupportFragmentManager().beginTransaction();
tx.replace(R.id.main_frame, mGridMenuFragment);
tx.addToBackStack(null);
tx.commit();
}
}));
return view;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
setHasOptionsMenu(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
staggeredGridLayoutManager = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL);
recyclerView.setLayoutManager(staggeredGridLayoutManager);
final ArrayList<SuggestGetSet> filteredModelList = new ArrayList<>();
for (SuggestGetSet movie : filteredModelList) {
filteredModelList.add(movie);
}
dlAdapter = new DealerListAdapter(filteredModelList, getActivity());
recyclerView.setAdapter(dlAdapter);
}
//search dealer from search view
SearchView.OnQueryTextListener listener = new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String s) {
return false;
}
#Override
public boolean onQueryTextChange(String s) {
final ArrayList<SuggestGetSet> filteredModelList = filter(dealerList, s);
dlAdapter.animateTo(filteredModelList);
recyclerView.scrollToPosition(0);
return true;
}
};
private ArrayList<SuggestGetSet> filter(ArrayList<SuggestGetSet> models, String query) {
query = query.toLowerCase();
final ArrayList<SuggestGetSet> filteredModelList = new ArrayList<>();
for (SuggestGetSet model : models) {
final String text = model.getName().toLowerCase();
if (text.contains(query)) {
filteredModelList.add(model);
}
}
return filteredModelList;
}
//custom context menu data
private void setupGridMenu() {
List<GridMenu> menus = new ArrayList<>();
menus.add(new GridMenu("Order", R.drawable.nnn));
menus.add(new GridMenu("Banking", R.drawable.n));
menus.add(new GridMenu("Credit Note", R.drawable.nn));
menus.add(new GridMenu("Cheques", R.drawable.nnnn));
menus.add(new GridMenu("Invoice Dispatch", R.drawable.nnnnn));
menus.add(new GridMenu("Goods Return", R.drawable.nnnnnn));
mGridMenuFragment.setupMenu(menus);
}
private void getJsonRequest() {
progressView.start();
final SQLiteHandler sqLiteHandler = new SQLiteHandler(getActivity().getApplicationContext());
Cursor cr = sqLiteHandler.getData(sqLiteHandler);
cr.moveToFirst();
do {
repNo = cr.getString(0);
} while (cr.moveToNext());
cr.close();
CustomJsonObjectRequest request = new CustomJsonObjectRequest(Request.Method.POST, AppConfig.URL_JSON_DEALER_LIST, hashMap, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
progressView.stop();
try {
JSONObject jsonObject = new JSONObject(String.valueOf(response));
if (jsonObject.names().get(0).equals("feed")) {
dealerList = parseJsonResponse(response);
dlAdapter.setDealertList(dealerList);
JSONArray arrayAchSum = response.getJSONArray("feedd");
for (int i = 0; i < arrayAchSum.length(); i++) {
JSONObject obj3 = arrayAchSum.getJSONObject(i);
String a = obj3.getString("dis_channel");
disChannel.add(a);
}
} else {
Toast.makeText(getActivity(), "No Dealers Available", Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
/*dealerList = parseJsonResponse(response);
dlAdapter.setDealertList(dealerList);*/
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}) {
protected Map<String, String> getParams() throws AuthFailureError {
hashMap = new HashMap<String, String>();
hashMap.put("repNo", repNo);
return hashMap;
}
};
requestQueue.add(request);
request.setRetryPolicy(new DefaultRetryPolicy(15 * 1000, 0,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
}
private ArrayList<SuggestGetSet> parseJsonResponse(JSONObject response) {
ArrayList<SuggestGetSet> groupList = new ArrayList<>();
if (response != null || response.length() > 0) {
try {
JSONArray arrayDelaers = response.getJSONArray(KEY_FEED_NAME);
for (int i = 0; i < arrayDelaers.length(); i++) {
JSONObject currentObject = arrayDelaers.getJSONObject(i);
String rep = currentObject.getString(KEY_REP_ID);
String name = currentObject.getString(KEY_REP_NAME);
String dealerId = currentObject.getString(KEY_DEALER_ID);
SuggestGetSet delaers = new SuggestGetSet();
delaers.setId(rep);
delaers.setName(name);
delaers.setDealerId(dealerId);
groupList.add(delaers);
}
//Toast.makeText(getApplicationContext(), productList.toString(), Toast.LENGTH_LONG).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
return groupList;
}
public void onSortByName() {
itemSorter.sortItemByName(dealerList);
dlAdapter.notifyDataSetChanged();
}
public static interface ClickListener {
public void onClick(View view, int position);
//public void onLongClick(View view, int position);
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putParcelableArrayList(STATE_DEALER_LIST, dealerList);
}
}
My Adapter class.
public class DealerListAdapter extends RecyclerView.Adapter<DealerListAdapter.ViewHolderDealerList> {
private LayoutInflater layoutInflater;
public Context mcontext;
private List<SuggestGetSet> dealerArrayList;
private List<SuggestGetSet> originalDealerArrayList;
Typeface type;
private static String selectedRepId, selectedDealerId, selectedDealerName;
public DealerListAdapter() {
}
public DealerListAdapter(Context context) {
layoutInflater = LayoutInflater.from(context);
type = Typeface.createFromAsset(context.getAssets(), "helvr.ttf");
}
public static String getDealerName() {
return selectedDealerName;
}
public static String getDealerID() {
return selectedDealerId;
}
public static String getRepID() {
return selectedRepId;
}
public DealerListAdapter(ArrayList<SuggestGetSet> dList, Context context) {
this.mcontext = context;
layoutInflater = LayoutInflater.from(context);
dealerArrayList = new ArrayList<>(dList);
originalDealerArrayList = new ArrayList<>(dList);
type = Typeface.createFromAsset(context.getAssets(), "helvr.ttf");
}
public void setDealertList(ArrayList<SuggestGetSet> dealerAList) {
this.dealerArrayList = dealerAList;
originalDealerArrayList = new ArrayList<>(dealerAList);
notifyItemRangeChanged(0, dealerArrayList.size());
}
#Override
public ViewHolderDealerList onCreateViewHolder(ViewGroup parent, int viewType) {
View view = layoutInflater.inflate(R.layout.custom_dealer_list_layout, parent, false);
ViewHolderDealerList viewHolderDealerList = new ViewHolderDealerList(view);
return viewHolderDealerList;
}
#Override
public void onBindViewHolder(ViewHolderDealerList holder, int position) {
final SuggestGetSet model = dealerArrayList.get(position);
holder.bind(model);
final int pos = position;
holder.dealerName.setText(dealerArrayList.get(position).getName());
holder.dealerName.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
selectedDealerId = dealerArrayList.get(pos).getDealerId();
selectedRepId = dealerArrayList.get(pos).getId();
selectedDealerName = dealerArrayList.get(pos).getName();
Toast.makeText(layoutInflater.getContext(), dealerArrayList.get(pos).getName() + " / " + dealerArrayList.get(pos).getDealerId() + " / " + dealerArrayList.get(pos).getId(), Toast.LENGTH_LONG).show();
}
});
}
#Override
public int getItemCount() {
return dealerArrayList.size();
}
public void setModels(ArrayList<SuggestGetSet> models) {
dealerArrayList = new ArrayList<>(models);
}
static class ViewHolderDealerList extends RecyclerView.ViewHolder {
private TextView dealerName, dealerId;
public ViewHolderDealerList(View itemView) {
super(itemView);
dealerName = (TextView) itemView.findViewById(R.id.yourDelaerName);
//dealerId = (TextView) itemView.findViewById(R.id.txtDelaerCollection);
}
public void bind(SuggestGetSet model) {
dealerName.setText(model.getName());
}
}
//search animations
public SuggestGetSet removeItem(int position) {
final SuggestGetSet model = dealerArrayList.remove(position);
notifyItemRemoved(position);
return model;
}
public void addItem(int position, SuggestGetSet model) {
dealerArrayList.add(position, model);
notifyItemInserted(position);
}
public void moveItem(int fromPosition, int toPosition) {
final SuggestGetSet model = dealerArrayList.remove(fromPosition);
dealerArrayList.add(toPosition, model);
notifyItemMoved(fromPosition, toPosition);
}
public void animateTo(ArrayList<SuggestGetSet> models) {
applyAndAnimateRemovals(models);
applyAndAnimateAdditions(models);
applyAndAnimateMovedItems(models);
}
private void applyAndAnimateMovedItems(ArrayList<SuggestGetSet> models) {
for (int toPosition = dealerArrayList.size() - 1; toPosition >= 0; toPosition--) {
final SuggestGetSet model = dealerArrayList.get(toPosition);
final int fromPosition = models.indexOf(model);
if (fromPosition >= 0 && fromPosition != toPosition) {
moveItem(fromPosition, toPosition);
}
}
notifyDataSetChanged();
}
private void applyAndAnimateAdditions(ArrayList<SuggestGetSet> models) {
for (int i = 0, count = dealerArrayList.size(); i < count; i++) {
final SuggestGetSet model = dealerArrayList.get(i);
if (!models.contains(model)) {
addItem(i, model);
}
}
notifyDataSetChanged();
}
private void applyAndAnimateRemovals(ArrayList<SuggestGetSet> models) {
for (int i = dealerArrayList.size() - 1; i >= 0; i--) {
final SuggestGetSet model = dealerArrayList.get(i);
if (!models.contains(model)) {
removeItem(i);
}
}
notifyDataSetChanged();
}
}

Just Modify your function and Add check for null or "" .
it will work fine
private ArrayList<SuggestGetSet> filter(ArrayList<SuggestGetSet> models, String query) {
if(TextUtils.isEmpty(query)){
return models;
}
query = query.toLowerCase();
final ArrayList<SuggestGetSet> filteredModelList = new ArrayList<>();
for (SuggestGetSet model : models) {
final String text = model.getName().toLowerCase();
if (text.contains(query)) {
filteredModelList.add(model);
}
}
return filteredModelList;
}

RecyclerView fling and move not smooth

i am chinese coder.i am not good at english,so just try hard to describe the question. thank you very much for your answer.
when i first into activity with RecyclerView and scroll,it is not smooth especially showing next item next ,but when i have scrolled the Recyclerview,it is work,and smooth . some coder say we can't do much work on onCreateViewHolder() and onBindViewHolder() , but i can not get it.
here is my code:
fragment
public class HomeFragment extends RefreshableFragment implements IHomeView {
#Bind(R.id.refresh_view)
PullToRefreshRecyclerView refresh_view;
private RecyclerView refreshableView;
private HomePresenter homePresenter;
#Override
public View initSuccessView() {
View view = View.inflate(getContext(), R.layout.fragment_refreshable_success_recyclerview, null);
ButterKnife.bind(this, view);
initRefreshLayout();
initRecyclerView();
return view;
}
/**
* 初始化可刷新控件
*/
private void initRefreshLayout() {
refresh_view.setMode(PullToRefreshBase.Mode.BOTH);
refresh_view.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<RecyclerView>() {
#Override
public void onPullDownToRefresh(PullToRefreshBase<RecyclerView> refreshView) {
homePresenter.refresh();
}
#Override
public void onPullUpToRefresh(PullToRefreshBase<RecyclerView> refreshView) {
homePresenter.loadMore();
}
});
}
/**
* 初始化RecyclerView控件
*/
private void initRecyclerView() {
refreshableView = refresh_view.getRefreshableView();
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getContext(),LinearLayoutManager.VERTICAL,false);
SpaceItemDecoration decor = new SpaceItemDecoration(2);
refreshableView.addItemDecoration(decor);
refreshableView.setLayoutManager(layoutManager);
refreshableView.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int childCount = recyclerView.getChildCount();
for (int i = 0; i < childCount; i++) {
View view = recyclerView.getChildAt(i);
RecyclerView.ViewHolder holder = recyclerView.getChildViewHolder(view);
switch (holder.getItemViewType()){
case HomeAdapter.TYPE_TOPIC:
HomeTopicViewHolder topicViewHolder = (HomeTopicViewHolder) holder;
topicViewHolder.setParentHeight(recyclerView.getHeight());
topicViewHolder.setOffset();
}
}
}
});
}
#Override
protected void requestNetwork() {
homePresenter = new HomePresenter(getContext(),this,null);
homePresenter.init();
}
#Override
public RecyclerView getRecyclerView() {
return refreshableView;
}
#Override
public RefreshView getRefreshView() {
return getParentRefreshView();
}
#Override
public void onRefreshFinish() {
if(refresh_view.isRefreshing()){
refresh_view.onRefreshComplete();
}
}
#Override
public void onLordMoreFinish() {
}
}
presenter
public class HomePresenter extends BasePresenter<IHomeView> implements IHomePresenter, StringLoaderCallback {
private Gson gson;
private HomeAdapter homeAdapter;
private final Pagination pagination;
public HomePresenter(Context context,IHomeView homeView,Bundle bundle) {
super(context,homeView,bundle);
gson = new Gson();
homeAdapter = new HomeAdapter();
getPresenterView().getRecyclerView().setAdapter(homeAdapter);
pagination = new Pagination();
pagination.setLimit(10);
pagination.setOffset(0);
}
#Override
public void init() {
String bannerUrl = ServerAPI.Home.buildHomeBannerUrl();
NetworkStringLoader.getInstance(context).sendGetStringRequest(bannerUrl, null, bannerUrl, this);
String topicUrl = ServerAPI.Home.buildHomeTopicUrl();
NetworkStringLoader.getInstance(context).sendGetStringRequest(topicUrl, null, topicUrl, this);
String routeUrl = ServerAPI.Home.buildHomeRouteUrl();
NetworkStringLoader.getInstance(context).sendGetStringRequest(routeUrl, pagination.getMap(), REFRESH, this);
}
#Override
public void loadMore() {
String routeUrl = ServerAPI.Home.buildHomeRouteUrl();
pagination.setOffset(pagination.getTotal());
pagination.setLimit(10);
NetworkStringLoader.getInstance(context).sendGetStringRequest(routeUrl, pagination.getMap(), LOADMORE, this);
}
#Override
public void refresh() {
pagination.setOffset(0);
pagination.setLimit(10);
pagination.clearTotal();
init();
}
#Override
public void onLoadFinished(String url,Map<String,String> params, String data,Object tag) {
if(url.equals(ServerAPI.Home.buildHomeBannerUrl())){
Log.i(url,data);
HomeBanner.HomeBannerLists homeBannerLists = gson.fromJson(data,HomeBanner.HomeBannerLists.class);
homeAdapter.setBanners(homeBannerLists.list);
}
if(url.equals(ServerAPI.Home.buildHomeTopicUrl())){
Log.i(url,data);
HomeTopic.HomeTopicLists homeTopicLists = gson.fromJson(data,HomeTopic.HomeTopicLists.class);
homeAdapter.setTopics(homeTopicLists.list);
}
if(url.equals(ServerAPI.Home.buildHomeRouteUrl())){
Log.i(url,data);
int mode = (int) tag;
HomeRoute.HomeRouteLists homeRouteLists = gson.fromJson(data, HomeRoute.HomeRouteLists.class);
if (mode == REFRESH){
homeAdapter.setRoutes(homeRouteLists.list);
} else if(mode == LOADMORE){
homeAdapter.appendRoutes(homeRouteLists.list);
}
pagination.appendTotal(homeRouteLists.list.size());
}
getPresenterView().getRefreshView().setCurrentState(RefreshView.STATE_SUCCESS);
getPresenterView().onRefreshFinish();
}
#Override
public void onLoadError(VolleyError error) {
Log.i("error",error.getMessage());
}
}
adapter
public class HomeAdapter extends RecyclerView.Adapter {
public static final int TYPE_BANNER = 0;
public static final int TYPE_TOPIC = 1;
public static final int TYPE_ROUTE = 2;
private List<HomeBanner> banners = new ArrayList<>();
private List<HomeTopic> topics = new ArrayList<>();
private List<HomeRoute> routes = new ArrayList<>();
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType){
case TYPE_BANNER:
View bannerView = HomeBannerViewHolder.getView(parent.getContext());
return new HomeBannerViewHolder(bannerView);
case TYPE_TOPIC:
View topicView = View.inflate(parent.getContext(), R.layout.item_home_topic,null);
// View topicView = HomeTopicViewHolder.getView(parent.getContext());
return new HomeTopicViewHolder(topicView);
case TYPE_ROUTE:
View routeView = View.inflate(parent.getContext(), R.layout.item_home_route,null);
// View routeView = HomeRouteViewHolder.getView(parent.getContext());
return new HomeRouteViewHolder(routeView);
default:
// View defaultView = new View(parent.getContext());
View view = EmptyViewHolder.getView(parent.getContext());
return new EmptyViewHolder(view);
}
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if(position == 0){
onBindBannerViewHolder(holder);
}else if(position>0 && position<topics.size()+1){
onBindTopicViewHolder(holder,position-1);
}else {
onBindRouteViewHolder(holder,position-topics.size()-1);
}
}
private void onBindRouteViewHolder(RecyclerView.ViewHolder holder, int position) {
HomeRouteViewHolder routeViewHolder = (HomeRouteViewHolder) holder;
routeViewHolder.setData(routes.get(position));
}
private void onBindTopicViewHolder(RecyclerView.ViewHolder holder,int position) {
HomeTopicViewHolder topicViewHolder = (HomeTopicViewHolder) holder;
topicViewHolder.setData(topics.get(position));
}
private void onBindBannerViewHolder(RecyclerView.ViewHolder holder) {
HomeBannerViewHolder bannerViewHolder = (HomeBannerViewHolder) holder;
bannerViewHolder.setData(banners);
}
#Override
public int getItemCount() {
return 1 + topics.size()+routes.size();
}
#Override
public int getItemViewType(int position) {
if(position == 0){
return TYPE_BANNER;
}else if(position<topics.size()+1){
return TYPE_TOPIC;
}else {
return TYPE_ROUTE;
}
}
public void setBanners(List<HomeBanner> list){
banners.clear();
banners.addAll(list);
notifyDataSetChanged();
}
public void setTopics(List<HomeTopic> list) {
topics.clear();
topics.addAll(list);
notifyDataSetChanged();
}
public void setRoutes(List<HomeRoute> list) {
routes.clear();
routes.addAll(list);
notifyDataSetChanged();
}
public void appendRoutes(List<HomeRoute> list) {
routes.addAll(routes.size(),list);
notifyItemRangeInserted(getItemCount(),list.size());
}
}
holder
public class HomeTopicViewHolder extends BaseViewHolder<HomeTopic> {
private static SimpleDraweeView content_iv ;
private static TextView home_topic_title ;
private static TextView home_topic_discription ;
private int height;
public static View getView(Context context) {
View topicView = View.inflate(context, R.layout.item_home_topic,null);
return topicView;
}
public HomeTopicViewHolder(View itemView) {
super(itemView);
content_iv = (SimpleDraweeView) itemView.findViewById(R.id.home_topic_iv);
if(content_iv!=null){
content_iv = (SimpleDraweeView) itemView.findViewById(R.id.home_topic_iv);
}
if(home_topic_title!=null){
home_topic_title = (TextView) itemView.findViewById(R.id.home_topic_title);
}
if(home_topic_discription!=null){
home_topic_discription = (TextView) itemView.findViewById(R.id.home_topic_discription);
}
if(height==0){
SharedPreferences sp = SharedPreferenceHelper.getInstance().getSharedPreference(itemView.getContext(), SharedPreferenceHelper.EnumSPName.CONFIG);
int scale = sp.getInt(SharedPreferenceHelper.EnumSPName.windowWidth, 0);
FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(scale,scale);
content_iv.setLayoutParams(layoutParams);
}
}
#Override
protected void inflateView(HomeTopic data) {
NetworkImageLoader loader = NetworkImageLoader.getInstance();
loader.setUrlToSimpleDraweeView(data.getImage(),content_iv);
home_topic_title.setText(data.getName());
home_topic_discription.setText(String.format(getResources().getString(R.string.guider_route),data.getGuide(), data.getRoute()));
}
public void setOffset() {
int itemViewHeight = itemView.getHeight();
int imageViewHeight = content_iv.getHeight();
int parentOffsetMax = (getParentHeight() + itemViewHeight) / 2;
int offsetMax = imageViewHeight - itemViewHeight;
float y = itemView.getY();
float location = y + itemViewHeight/2;
float v = location - getParentHeight() / 2;
float percent = v/parentOffsetMax;
int margin = (int) ((offsetMax/2)*(percent + 1));
FrameLayout.LayoutParams layoutParams = (FrameLayout.LayoutParams) content_iv.getLayoutParams();
layoutParams.setMargins(0,-margin,0,0);
content_iv.setLayoutParams(layoutParams);
}
public void setParentHeight(int height) {
this.height = height;
}
public int getParentHeight() {
return height;
}
}