groovy
implementation 'com.android.support:appcompat-v7:x.x.x'
implementation 'com.android.support:cardview-v7:x.x.x'
implementation 'com.android.support:recyclerview-v7:x.x.x'
implementation 'com.android.support:palette-v7:x.x.x'
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private MyAdapter adapter;
private List<String> data = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new MyAdapter(data);
recyclerView.setAdapter(adapter);
for (int i = 0; i < 10; i++) {
data.add("Item " + i);
}
adapter.notifyDataSetChanged();
}
}
class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private List<String> data;
public MyAdapter(List<String> data) {
this.data = data;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
String item = data.get(position);
holder.textView.setText(item);
}
@Override
public int getItemCount() {
return data.size();
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView textView;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.text);
}
}
}
