extends BaseAdapter to create adapter for images : Image « 2D Graphics « Android

1. Android
2. 2D Graphics
3. Image

extends BaseAdapter to create adapter for images

   

package app.test;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

public class Test extends Activity {
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);
          Gallery gallery = (Gallery)findViewById(R.id.gallery);
          ManateeAdapter manateeAdapter = new ManateeAdapter(this);
          gallery.setAdapter(manateeAdapter);
      }
      public static class ManateeAdapter extends BaseAdapter {
          private static final String TAG = "ManateeAdapter";
          private static int convertViewCounter = 0;
      private Context mContext;
          private LayoutInflater mInflater;

          static class ViewHolder {
              ImageView image;
          }
          
          private int[] manatees = {
                  R.drawable.icon, R.drawable.icon};
          
          private Bitmap[] manateeImages = new Bitmap[manatees.length];
          private Bitmap[] manateeThumbs = new Bitmap[manatees.length];

          public ManateeAdapter(Context context) {
            Log.v(TAG, "Constructing ManateeAdapter");
            this.mContext = context;
            mInflater = LayoutInflater.from(context);
            
            for(int i=0; i<manatees.length; i++) {
              manateeImages[i] = BitmapFactory.decodeResource(
                  context.getResources(), manatees[i]);
              manateeThumbs[i] = Bitmap.createScaledBitmap(manateeImages[i],
                  100, 100, false);
            }
          }
          
        public int getCount() {
          Log.v(TAG, "in getCount()");
          return manatees.length;
        }

        public int getViewTypeCount() {
          Log.v(TAG, "in getViewTypeCount()");
          return 1;
        }
        
        public int getItemViewType(int position) {
          Log.v(TAG, "in getItemViewType() for position " + position);
          return 0;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
              ViewHolder holder;
              
              Log.v(TAG, "in getView for position " + position + 
                  ", convertView is " +
                  ((convertView == null)?"null":"being recycled"));

              if (convertView == null) {
                  convertView = mInflater.inflate(R.layout.row, null);
                  convertViewCounter++;
                  Log.v(TAG, convertViewCounter + " convertViews have been created");

                  holder = new ViewHolder();
                  holder.image = (ImageView) convertView.findViewById(R.id.gridImageView);

                  convertView.setTag(holder);
              } else {
                  holder = (ViewHolder) convertView.getTag();
              }

              holder.image.setImageBitmap(manateeImages[position]);

              return convertView;
          }

        public Object getItem(int position) {
          Log.v(TAG, "in getItem() for position " + position);
          return manateeImages[position];
        }

        public long getItemId(int position) {
          Log.v(TAG, "in getItemId() for position " + position);
          return position;
        }
      }
}
//main.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- This file is at /res/layout/gallery.xml -->
<Gallery xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/gallery"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    />
//row.xml

<?xml version="1.0" encoding="utf-8"?>
<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/gridImageView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="#555"
    android:scaleType="centerInside"
    android:padding="5dip"
    android:maxHeight="50dip"
    android:maxWidth="50dip"
  />

   
    
    
  

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