Android Open Source - personal-diary Image Adapter

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License

The source code is released under:

GNU Lesser General Public License

Java Source Code

package com.rahul.pDiary;
// www. j a v  a  2 s.  c  o m
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

//Image Adapter
public class ImageAdapter extends BaseAdapter {
  static final String TAG = "ImageAdapter";
    int mGalleryItemBackground;
    private Context mContext;
    
    String absolutePath;
    String[] paths;

    public ImageAdapter(Context c, String absolutePath) {
        mContext = c;
        this.absolutePath = absolutePath;
        TypedArray attr = mContext.obtainStyledAttributes(R.styleable.style_gallery);
        mGalleryItemBackground = attr.getResourceId(
                R.styleable.style_gallery_android_galleryItemBackground, 0);
        attr.recycle();
        
        //Parsing the photo URIs
        paths = absolutePath.split(";");
    }

    public int getCount() {
        return paths.length;
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView = new ImageView(mContext);

    /* There isn't enough memory to open up more than a couple camera photos */
    /* So pre-scale the target bitmap into which the file is decoded */

    /* Get the size of the ImageView */
    int targetW = 200; 
    int targetH = 150;
    imageView.setMinimumWidth(targetW);
    imageView.setMinimumHeight(targetH);
    
    Log.d(TAG, "Width & Height : " + targetW + " & " + targetH);

    /* Get the size of the image */
    BitmapFactory.Options bmOptions = new BitmapFactory.Options();
    bmOptions.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(paths[position], bmOptions);
    int photoW = bmOptions.outWidth;
    int photoH = bmOptions.outHeight;
    
    /* Figure out which way needs to be reduced less */
    int scaleFactor = 1;
    if ((targetW > 0) || (targetH > 0)) {
      scaleFactor = Math.min(photoW/targetW, photoH/targetH);  
    }

    /* Set bitmap options to scale the image decode target */
    bmOptions.inJustDecodeBounds = false;
    bmOptions.inSampleSize = scaleFactor;
    bmOptions.inPurgeable = true;

    /* Decode the JPEG file into a Bitmap */
    Bitmap bitmap = BitmapFactory.decodeFile(paths[position], bmOptions);
    
    /* Associate the Bitmap to the ImageView */
    imageView.setImageBitmap(bitmap);

        imageView.setLayoutParams(new Gallery.LayoutParams(200, 150));
        imageView.setScaleType(ImageView.ScaleType.FIT_XY);
        imageView.setBackgroundResource(mGalleryItemBackground);

        return imageView;
    }
}

Java Source Code List

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