I already created RecyclerView with view holder and with one list. But I need one textView on start and the second on the end. How can I do it?
I created layout with two TextViews, there are already on there locations. But I should set for first textView animalNames and for second - peopleNames. Here is my code:
MainActivity.java
public class MainActivity extends AppCompatActivity {
MyRecyclerViewAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ArrayList<String> animalNames = new ArrayList<>();
animalNames.add("Horse");
animalNames.add("Cow");
animalNames.add("Camel");
animalNames.add("Sheep");
animalNames.add("Goat");
ArrayList<String> peopleNames = new ArrayList<>();
animalNames.add("Harry");
animalNames.add("John");
animalNames.add("Sergey");
animalNames.add("Steve");
animalNames.add("Woody");
RecyclerView recyclerView = findViewById(R.id.rvAnimals);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new MyRecyclerViewAdapter(this, animalNames);
recyclerView.setAdapter(adapter);
adapter.setClickListener(new MyRecyclerViewAdapter.ItemClickListener() {
@Override
public void onItemClick(View view, int position) {
Toast.makeText(getApplicationContext(), "You clicked " + adapter.getItem(position) + " on row number " + position, Toast.LENGTH_SHORT).show();
}
});
}
}
MyRecyclerViewAdapter.java
public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {
private List<String> mData;
private LayoutInflater mInflater;
private ItemClickListener mClickListener;
MyRecyclerViewAdapter(Context context, List<String> data) {
this.mInflater = LayoutInflater.from(context);
this.mData = data;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.custom_view, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
String animal = mData.get(position);
holder.myTextView.setText(animal);
}
@Override
public int getItemCount() {
return mData.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView myTextView;
TextView myTextView2;
ViewHolder(View itemView) {
super(itemView);
myTextView = itemView.findViewById(R.id.tvAnimalName);
myTextView2 = itemView.findViewById(R.id.tvAnimalName2);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
}
}
String getItem(int id) {
return mData.get(id);
}
void setClickListener(ItemClickListener itemClickListener) {
this.mClickListener = itemClickListener;
}
public interface ItemClickListener {
void onItemClick(View view, int position);
}
}
custom_view.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="10dp">
<TextView
android:id="@+id/tvAnimalName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_marginStart="8dp"
android:textSize="20sp" />
<TextView
android:id="@+id/tvPersonName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_marginEnd="8dp"
android:textSize="20sp" />
</RelativeLayout>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/rvAnimals"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
Pass the person array list also in the constructor of the recycler view
//like in activity
RecyclerView recyclerView = findViewById(R.id.rvAnimals);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new MyRecyclerViewAdapter(this, animalNames,personNames);
//in adapter class
create a list for person also
private List<String> mData;
private List<String> mpersonData;
// adapter constructor
MyRecyclerViewAdapter(Context context, List<String> data,List<String> mpersonData) {
this.mInflater = LayoutInflater.from(context);
this.mData = data;
this.mpersonData = mpersonData;
}
//onbind view holder
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
String animal = mData.get(position);
String person = mData.get(position);
holder.myTextView.setText(animal);
holder.myTextView.setText(person);
}
//change the tv id name to person
ViewHolder(View itemView) {
super(itemView);
myTextView = itemView.findViewById(R.id.tvAnimalName);
// just change this to person name
myTextView2 = itemView.findViewById(R.id.tvPersonalName);
itemView.setOnClickListener(this);
}
Now you will set person name also in the recycler view text field
Paste this code instead of relative layout use linear layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="10dp">
<TextView
android:id="@+id/tvAnimalName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:weight="1"
android:gravity="start"
android:layout_marginStart="8dp"
android:textSize="20sp" />
<TextView
android:id="@+id/tvPersonName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:weight="1"
android:gravity="end"
android:layout_marginEnd="8dp"
android:textSize="20sp" />
</LinearLayout>
and you can have two columns as mentioned in the question