Main class:
recyclerView = (RecyclerView)findViewById(R.id.card_recycler_view);
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getApplicationContext(),2);
recyclerView.setLayoutManager(layoutManager);
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("http://192.168.0.2/littlezebra/scripts/")
.addConverterFactory(GsonConverterFactory.create())
.build();
login service = retrofit.create(login.class);
Call<dashboard> call = service.dash();
call.enqueue(new Callback<dashboard>() {
@Override
public void onResponse(Call<dashboard> call, Response<dashboard> response) {
dashboard dashboard = response.body();
data = new ArrayList<>(Arrays.asList(dashboard. getDashboard_info()));
adapter = new DataAdapter(data,context);
recyclerView.setAdapter(adapter);
}
Adapter class:
public class DataAdapter extends RecyclerView.Adapter<DataAdapter.ViewHolder> {
private ArrayList<dashboard.Dashboard_info> android;
private Context context;
public DataAdapter(ArrayList<dashboard.Dashboard_info> android,Context context) {
this.android = android;
this.context = context;
}
public DataAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_row, viewGroup, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(DataAdapter.ViewHolder viewHolder, int i) {
viewHolder.tv_name.setText(android.get(i).getId());
Picasso.with(context).load(android.get(i)
.getWeek_image())
.resize(250,200) //to resize Image
.into(viewHolder.img_android);
viewHolder.tv_api_level.setText(android.get(i).getWeek_name());
}
@Override
public int getItemCount() {
return android.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
private TextView tv_name;
private ImageView img_android;
private TextView tv_api_level;
public ViewHolder(View view) {
super(view);
tv_name = (TextView)view.findViewById(R.id.tv_name);
img_android = (ImageView) view.findViewById(R.id.img_android);
tv_api_level = (TextView)view.findViewById(R.id.tv_api_level);
}
}
Process:
com.example.admin.myappl, PID: 5047 java.lang.IllegalArgumentException: Context must not be null. at com.squareup.picasso.Picasso$Builder.(Picasso.java:701) at com.squareup.picasso.Picasso.with(Picasso.java:662) at com.example.admin.myappl.Adapter.DataAdapter.onBindViewHolder(DataAdapter.java:37) at com.example.admin.myappl.Adapter.DataAdapter.onBindViewHolder(DataAdapter.java:18) at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6400) at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6433) at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5377) at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5640) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5482) at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5478) at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2215) at android.support.v7.widget.GridLayoutManager.layoutChunk(GridLayoutManager.java:556) at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1502) at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:595) at android.support.v7.widget.GridLayoutManager.onLayoutChildren(GridLayoutManager.java:170) at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3625) at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3354) at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3886) at android.view.View.layout(View.java:17838) at android.view.ViewGroup.layout(ViewGroup.java:5754) at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1189) at android.view.View.layout(View.java:17838) at android.view.ViewGroup.layout(ViewGroup.java:5754) at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:131) at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42) at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1389) at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:868) at android.view.View.layout(View.java:17838) at android.view.ViewGroup.layout(ViewGroup.java:5754) at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1192) at android.view.View.layout(View.java:17838) at android.view.ViewGroup.layout(ViewGroup.java:5754) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:383) at android.widget.FrameLayout.onLayout(FrameLayout.java:321) at android.view.View.layout(View.java:17838) at android.view.ViewGroup.layout(ViewGroup.java:5754) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1982) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1826) at android.widget.LinearLayout.onLayout(LinearLayout.java:1735) at android.view.View.layout(View.java:17838) at android.view.ViewGroup.layout(ViewGroup.java:5754) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:383) at android.widget.FrameLayout.onLayout(FrameLayout.java:321) at android.view.View.layout(View.java:17838) at android.view.ViewGroup.layout(ViewGroup.java:5754) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1982) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1826) at android.widget.LinearLayout.onLayout(LinearLayout.java:1735) at android.view.View.layout(View.java:17838) at android.view.ViewGroup.layout(ViewGroup.java:5754) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:383) at android.widget.FrameLayout.onLayout(FrameLayout.java:321) at com.android.internal.policy.DecorView.onLayout(DecorView.java:751) at android.view.View.layout(View.java:17838) 08-16 17:01:40.928 5047-5047/com.example.admin.myappl E/AndroidRuntime: at android.view.ViewGroup.layout(ViewGroup.java:5754) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2722)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2395) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1473) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6976)