Android Open Source - android-cardview Hello World Adapter

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License

The source code is released under:

Apache License

Java Source Code

package de.pecheur.card;
/* w  w  w.ja  va  2 s.c o m*/
import java.util.ArrayList;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class HelloWorldAdapter extends BaseAdapter {
  private Context context;
  private static final int ITEM_TYPE_COUNT = 4;
  
  // it is important to use ids, if you are going to 
  // delete or add views, or the cardview is not 
  // going to find the selected card again after a change.
  private ArrayList<Integer> mIds;

  private ArrayList<String> mItems;
  
  
  public HelloWorldAdapter(Context context) {
    this.context = context;
    
    // load hello world string array from resources.
    String[] items = context.getResources().
        getStringArray(R.array.hello_worlds);
    
    mItems = new ArrayList<String>();
    
    // to guarantee stable ids:
    mIds = new ArrayList<Integer>();  
    int idCounter = 0;
    
    
    for(String item : items) {
      mItems.add(item);
      mIds.add(idCounter++);
    }
    
    notifyDataSetChanged();
  }
  
  @Override
  public String getItem(int position) {
    return mItems.get(position);
  }
  
  @Override
  public int getCount() {
    return mItems.size();
  }

  @Override
  public long getItemId(int position) {
    return mIds.get(position);
  }
  
  @Override
  public boolean hasStableIds() {
    return true;
  }
  
   @Override
  public int getViewTypeCount() {
     return ITEM_TYPE_COUNT;
  }
   
   @Override
  public int getItemViewType(int position) {
     return mIds.get(position)%ITEM_TYPE_COUNT;
  }
  
  /**
   * simple item remove implementation for
   * demonstration purposes.
   * @param position of item
   */
  public void remove(int position) {
    mItems.remove(position);
    mIds.remove(position);
    notifyDataSetChanged();
  }
  

  @Override
  public View getView(int position, View view, ViewGroup parent) {
    if (view == null) {
          view = LayoutInflater.from(context)
              .inflate(R.layout.card_view, parent, false);

        switch( getItemViewType(position)) {
        case 0:
          view.setBackgroundResource(R.drawable.card_background_orange);
          break;
        case 1:
          view.setBackgroundResource(R.drawable.card_background_green);
          break;
        case 2:
          view.setBackgroundResource(R.drawable.card_background_blue);
          break;
        case 3:
          view.setBackgroundResource(R.drawable.card_background_red);
          break;
        }
        }

      TextView text = (TextView) view;
    text.setText( getItem(position));

        return view;
  }
}

Java Source Code List

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