I am using RecyclerView to show some data in form of list, but the data won't display.
Following is my code, I am using to implement RecyclerView
public class MainActivity extends AppCompatActivity implements SearchView.OnQueryTextListener{
String[] c_names={"INDIA","US","UK","AUSTRALIA","CHINA","JAPAN"};
int[] c_flags={R.drawable.india,R.drawable.india,R.drawable.india,R.drawable.india,R.drawable.india,R.drawable.india};
private RecyclerView recyclerView;
RecyclerAdapter recyclerAdapter;
ArrayList<Country> arrayList=new ArrayList<>();
private Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar=findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
recyclerView=findViewById(R.id.recyclerview);
recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
recyclerView.setHasFixedSize(true);
int count=0;
for(String Name:c_names){
arrayList.add(new Country(Name,c_flags[count]));
Log.i("ggg", "onCreate: "+arrayList.get(count).getName()+" "+arrayList.get(count).getFlag_id());
count++;
}
recyclerAdapter=new RecyclerAdapter(arrayList);
recyclerView.setAdapter(recyclerAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main,menu);
MenuItem menuItem=menu.findItem(R.id.ction_search);
SearchView searchView= (SearchView) MenuItemCompat.getActionView(menuItem);
searchView.setOnQueryTextListener(this);
return true;
}
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
newText=newText.toLowerCase();
ArrayList<Country> newList=new ArrayList<>();
for(Country country:arrayList){
String name=country.getName().toLowerCase();
if(name.contains(newText)){
newList.add(country);
}
}
recyclerAdapter.setFilter(newList);
return true;
}
}
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.MyViewHolder> {
ArrayList<Country> arrayList=new ArrayList<>();
public RecyclerAdapter(ArrayList<Country> arrayList) {
this.arrayList = arrayList;
}
@Override
public RecyclerAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.row_layout,
parent,false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(RecyclerAdapter.MyViewHolder holder, int position) {
holder.c_flags.setImageResource(arrayList.get(position).getFlag_id());
holder.c_name.setText(arrayList.get(position).getName());
}
@Override
public int getItemCount() {
return arrayList.size();
}
public static class MyViewHolder extends RecyclerView.ViewHolder{
ImageView c_flags;
TextView c_name;
public MyViewHolder(View itemView) {
super(itemView);
c_flags=itemView.findViewById(R.id.flag);
c_name=itemView.findViewById(R.id.name);
}
}
public void setFilter(ArrayList<Country> filter){
// filter=new ArrayList<>();
arrayList.addAll(filter);
notifyDataSetChanged();
}
}
activity_main
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
tools:context="pritish.sawant.com.filterrecyclerview.MainActivity">
<include layout="@layout/toolbar_layout"/>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/recyclerview"/>
</LinearLayout>
row_layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginLeft="4dp"
android:layout_marginBottom="8dp"
android:layout_marginRight="4dp">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="50dp"
android:elevation="5dp"
app:cardCornerRadius="8dp"
android:background="#9E9E9E"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="8dp"
android:background="#9E9E9E">
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="8dp"
android:scaleType="fitXY"
android:id="@+id/flag"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/flag"
android:layout_marginLeft="20dp"
android:gravity="center"
android:layout_centerVertical="true"
android:textSize="15dp"
android:textStyle="bold"
android:id="@+id/name"
android:textColor="#000000"
/>
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
toolbar_layout
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="?attr/colorPrimary"
android:id="@+id/toolbar"
app:theme="@style/ThemeOverlay.AppCompat.Dark">
</android.support.v7.widget.Toolbar>
My RecyclerView is blank.
I am showing the arrays mentioned in MainActivity in my RecyclerView. I tried a lot but couldn't figure out what am I doing wrong? Any help would be greatly appreciated.
