Android Bitmap Create decodeSampledBitmapFromResource(Resources res, int id, int reqWidth, int reqHeight)

Description

decode Sampled Bitmap From Resource

Declaration

public static Bitmap decodeSampledBitmapFromResource(Resources res,
            int id, int reqWidth, int reqHeight) 

Method Source Code

//package com.java2s;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

public class Main {
    public static Bitmap decodeSampledBitmapFromResource(Resources res,
            int id, int reqWidth, int reqHeight) {

        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeResource(res, id, options);

        options.inSampleSize = calculateInSampleSize(options, reqWidth,
                reqHeight);/*from   w  w  w.j av a  2  s  .co  m*/

        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeResource(res, id, options);
    }

    public static int calculateInSampleSize(BitmapFactory.Options options,
            int reqWidth, int reqHeight) {

        final int height = options.outHeight;
        final int width = options.outWidth;
        int inSampleSize = 1;

        if (height > reqHeight || width > reqWidth) {

            final int heightRatio = Math.round((float) height
                    / (float) reqHeight);
            final int widthRatio = Math.round((float) width
                    / (float) reqWidth);

            inSampleSize = heightRatio < widthRatio ? heightRatio
                    : widthRatio;
        }

        return inSampleSize;
    }
}

Related

1. create2DBitmap(Bitmap bitmap)
2. decodeFromBytes(byte[] bs, int reqWidth, int reqHeight)
3. decodeFromResource(Resources res, int resId)
4. decodeFromResource(Resources res, int resId, int reqWidth, int reqHeight)
5. decodeSampledBitmapFromFile(String filePath, int reqWidth, int reqHeight)
6. decodeSampledBitmapFromResource(Resources res, int resId, int reqWidth, int reqHeight)
7. getBitmap(Context context, InputStream inputStream)
8. getImage(String absPath)
9. createCompatibleImage(int width, int height)