This is my code for RecyclerView:
public RecyclerGameAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = null;
if (viewType == AD_VIEW_TYPE) {}
else{
v = LayoutInflater.from(parent.getContext()).inflate(
R.layout.recyclerview_games, parent, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
I don't know how to declare the part that I´m showing the AdView in RecyclerAdapter.
Can you help me?
You would like to check the item type of the RecyclerView and then act accordingly. Use, the #Override method,
#Override
public int getItemViewType(int position)
{
if (position % 5 == 0){
return AD_TYPE;
}else{
return CONTENT_TYPE;
}
}
Then you can bind the content or the Ad to the item in onCreateViewHolder.
View view = null;
if (viewType == AD_TYPE)
{
view = new AdView(activity, AdSize.BANNER, ADMOB_ID);
float density = activity.getResources().getDisplayMetrics().density;
int height = Math.round(AdSize.BANNER.getHeight() * density);
AbsListView.LayoutParams params = new AbsListView.LayoutParams(AbsListView.LayoutParams.FILL_PARENT,height);
view.setLayoutParams(params);
view.loadAd(new AdRequest());
}
else{
view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item_layout, viewGroup, false);
}
RecyclerView.ViewHolder viewHolder = new RecyclerView.ViewHolder(view);
return viewHolder;
This should do the job.
Also check out, this thread and this thread for more inputs. Similar questions as yours. The second one is exactly a copy of yours. Found it after answering your question.
Related
I'm trying to achieve like this Two recyclerview when i scroll down , the first recylcer to be scrolled too, how?
I implemented this but I'm facing issue like 0th element of second list in second view type is missing but when I post new item then that missing item visible at position 1 of adapter but then that new item in second list is missing until and unless I don't post any any item in second list
#Override
public int getItemViewType(int position) {
if (isPositionPopularRt(position)) {
return TYPE_POPULAR_RT;
}
return TYPE_POST_LIST;
}
private boolean isPositionPopularRt(int position) {
return position == 0;
}
#NotNull
#Override
public RecyclerView.ViewHolder onCreateViewHolder(#NotNull ViewGroup viewGroup, int viewType) {
mUserModel = SharedPrefsUtils.getObject(AppConstants.PrefKey.KEY_USER_MODEL, UserModel.class);
if (viewType == TYPE_POST_LIST) {
//inflate your layout and pass it to view holder
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.view_for_cell, viewGroup, false);
CustomViewHolder tempViewHolder = new CustomViewHolder(view);
view.setTag(tempViewHolder);
return tempViewHolder;
} else if (viewType == TYPE_POPULAR_RT) {
//inflate your layout and pass it to view holder
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.popular_rt_recycler_view, viewGroup, false);
return new MyViewHolderPopularRt(v);
}
throw new RuntimeException("there is no type that matches the type " + viewType + " + make sure your using types correctly");
}
I am just adapting my custom adapter code with ViewHolder so that i can optimize my list view with a recycler, but i am not sure if i do it right.
My view holder class:
public class ViewHolderTask {
int positionHolder;
TextView nameHolder;
TextView timeHolder;
TextView sessionHolder;
TextView dateHolder;
FloatingActionButton mFabTaskHolder;
public ViewHolderTask(View v, int position) {
this.positionHolder = position;
this.nameHolder = v.findViewById(R.id.taskNameText);
this.timeHolder = v.findViewById(R.id.timeTextView);
this.sessionHolder = v.findViewById(R.id.textViewSession);
this.dateHolder = v.findViewById(R.id.dateTextView);
this.mFabTaskHolder = v.findViewById(R.id.myFabTask);
}
My custom adapter class:
#NonNull
#Override
public View getView(int position, #Nullable View convertView, #NonNull ViewGroup parent) {
ViewHolderTask holder;
if(convertView == null){
LayoutInflater inflater = (LayoutInflater) context.getSystemService(
Context.LAYOUT_INFLATER_SERVICE );
convertView = inflater.inflate(R.layout.task_row, parent, false);
holder = new ViewHolderTask(convertView, position);
convertView.setTag(holder);
}else{
holder = (ViewHolderTask) convertView.getTag();
}
Task task = taskArrayList.get(position);
//set the configurations
holder.getTimeHolder().setText(getTimeString(task.getTime()));
holder.getNameHolder().setText(task.getName());
holder.getDateHolder().setText(getDateString(task.getDate()));
holder.getSessionHolder().setText(getSessionString(task.getSession()));
//Set the FAB listener
addFabListener(holder.getmFabTaskHolder(), position);
//set the clicked background
if(TaskActivity.getIsClicked() && TaskActivity.getPositionClicked()-1 == position){
convertView.setBackgroundResource(R.color.backgroundSelectedItem);
}
return convertView;
}
Do I use it right?
Seems to be fine for me other than this portion of the code
//set the clicked background
if(TaskActivity.getIsClicked() && TaskActivity.getPositionClicked()-1 == position){
convertView.setBackgroundResource(R.color.backgroundSelectedItem);
}
You might need to reset the background resource back to default for the item which is not clicked. maybe you have to add "else" part to the "if"
Can anyone please please help me
I want to create a recycler view with 1st row scrolling horizontally and the rest should be scrolling vertically just like instagram home page.
I have looked up almost everything but no luck.
Please can anyone help.
In your adapter class
private static final int POSTER = 1; //for sliding item
private static final int CHILDGROUP = 2; //normal items
In getItemViewType()
#Override
public int getItemViewType(int position) {
if (position == 0 )
return POSTER;
else
return CHILDGROUP;
}
In onCreateViewHolder() check which item & inflate layout as per item
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == POSTER) {
View view = LayoutInflater.from(mContext).inflate(R.layout.listrow_auto_viewpager, parent, false);
return new PosterSliderHolder(view);
} else {
View view = LayoutInflater.from(mContext).inflate(R.layout.listrow_sub_category, parent, false);
return new GroupViewHolder(view);
}
}
In onBindViewHolder() check the item type & load the data
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (holder.getItemViewType() == POSTER) {
final PosterSliderHolder posterViewHolder = (PosterSliderHolder) holder;
//your logic for sliding item (horizontal recyclerview )
}
else{
final GroupViewHolder groupViewHolder = (GroupViewHolder) holder;
//normal list item
}
}
I am using the following code in Adapter class to show data in a RecyclerView, but now I would like to show data from some other ArrayList in a same RecyclerView (at some positions like: 1st position and 6th position) using different layout.
That different layout (assume: another_layout.xml) contains 2 TextViews and an Image, also want to implement click on listener for that layout too..
#Override
public PlaylistCardAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
// inflate a card layout
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.youtube_video_card, parent, false);
// populate the viewholder
ViewHolder vh = new ViewHolder(v);
return vh;
}
RecyclerView for more than one layout
1. Override getItemViewType(int position) method
e.g I have two layouts layout1 and layout2.I want layout1 at the top and then layout2. So getItemViewType would be something like this
#Override
public int getItemViewType(int position) {
if(position == 0){ //for layout1
return 1;
}else{
return 2; //for layout2
}
}
2. Different viewholder for each layout like this
class ViewHolder_LayoutOne extends RecyclerView.ViewHolder{
TextView name;
//Constructor
}
class ViewHolder_LayoutTwo extends RecyclerView.ViewHolder{
TextView name;
//Constructor
}
3. Inflate different layouts according to the position
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
RecyclerView.ViewHolder vh = null;
if(viewType == 1){
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_layout_one,parent,false);
vh = new MyViewHolder_LayoutOne(view);
}else if(viewType == 2){
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_layout_two,parent,false);
vh = new MyViewHolder_LayoutTwo(view);
}
return vh;
}
4. Bind your views as per the position
#Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
switch(getItemViewType(position)){
case 1: //for layout 1
((ViewHolder_LayoutOne)holder).name.setText("");
break;
case 2:// for layout 2
((ViewHolder_LayoutTwo)holder).name.setText("");
break;
}
}
5.Now Most important getItemCount() method //return the number of views
#Override
public int getItemCount() {
return toptitles.length + 1;
// as i have only layout at the top and the remaining size equals the length of the array toptitles.So the overall length would be
//number of views of layout1 + number of views of layout2
}
Hope this helps!!!
you can override getItemViewType, and use different ViewHolder for different layout.
You need to override getItemViewType like this :
#Override
public int getItemViewType(int position) {
Add your condition and return viewType(Constant)
}
Now, Check for viewType and retrun viewHolder accordingly.
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == VIEWHOLDER1) {
View v = LayoutInflater.from(activity).inflate(R.layout.layout1, parent, false);
return new ViewHolder1(v);
}else if(viewType == VIEWHOLDER2){
View v = LayoutInflater.from(activity).inflate(R.layout.layout2, parent, false);
return new ViewHolder2(v);
}
}
Now, Check for instance of viewHolder
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (holder instanceof ViewHolder1) {
Show values in UI accordingly.
}else if(holder instanceof ViewHolder2){
Show values in UI accordingly.
}
}
You can set the type you want in getItemViewType(int position) with the layout you want. And onCreateViewHolder you can check viewType and inflate the row accordingly.
here is an example.
I'm attempting to create a Gridview of icons with the Imageview set to one of two images like in my example below:
I'm retrieving two values from the sqlite content provider, one for the number of stamps and the other for the max number of stamps.
I use a custom adapter with a view holder pattern so I attempt to set the model onLoadFinished() in the Fragment. The model I've currently tried is an int[] with either value of 0 or 1 in the values to determine if green stamp is used or gray. This isn't working however as nothing is being displayed in the GridView.
Here's the code snippet from onLoadFinished() from the Fragment:
imageSourceModel = new int[data.getInt(data.getColumnIndex(RewardsEntry.COLUMN_REW_MAX_POINTS))];
int i = data.getInt(data.getColumnIndex(RewardsEntry.COLUMN_REW_POINTS));
for (int j = 0; j < imageSourceModel.length; j++, i--) {
if (i > 0) {
imageSourceModel[j] = 1;
} else {
imageSourceModel[j] = 0;
}
}
stampGridAdapter.setModel(imageSourceModel);
and the code from the custom Adapter:
#Override
public View getView(int i, View view, ViewGroup parent) {
ViewHolder viewHolder;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.list_item_discover, parent, false);
viewHolder = new ViewHolder(view);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
if (model[i] > 0) {
viewHolder.stampView.setImageResource(R.drawable.ic_approved_stamp);
} else {
viewHolder.stampView.setImageResource(R.drawable.ic_approved_stamp_disabled);
}
return view;
}
And simple ViewHolder:
private class ViewHolder {
public ImageView stampView;
public ViewHolder(View view) {
stampView = (ImageView) view.findViewById(R.id.grid_stamp_image);
}
}
If I had to guess, I would say that it fails because of the creation order such that getView() is completed before onLoadFinished() can pass the model in. I'm just not sure how to work around this or what other methods I could use. Any help is appreciated.
For what you want to achieve, this seems unnecessary complicated to me, especially the double variable loop. To cut it simple I'd just do this:
in onLoadFinished()
int maxPoints = data.getInt(data.getColumnIndex(RewardsEntry.COLUMN_REW_MAX_POINTS));
int currentPoints = data.getInt(data.getColumnIndex(RewardsEntry.COLUMN_REW_POINTS));
mGridView.setAdapter(new RewardPointAdapter(getActivity(), currentPoints, maxPoints);
your adapter could look like this:
public class RewardPointAdapter extends BaseAdapter {
private LayoutInflater mLayoutInflater;
private int mMaxRewardPoints;
private int mCurrentRewardPoints;
public RewardPointAdapter(Context context, int currentRewardPoints, int maxRewardPoints) {
mLayoutInflater = LayoutInflater.from(context);
mMaxRewardPoints = maxRewardPoints;
mCurrentRewardPoints = currentRewardPoints;
}
#Override
public int getCount() {
return mMaxRewardPoints;
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
convertView = mLayoutInflater.inflate(R.layout.list_item_discover, parent, false);
viewHolder = new ViewHolder(convertView);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
if (position < mCurrentRewardPoints) {
viewHolder.stampView.setImageResource(R.drawable.ic_approved_stamp);
} else {
viewHolder.stampView.setImageResource(R.drawable.ic_approved_stamp_disabled);
}
return convertView;
}
private class ViewHolder {
public ImageView stampView;
public ViewHolder(View view) {
stampView = (ImageView) view.findViewById(R.id.grid_stamp_image);
}
}
}