Android Bitmap Create decodeFromResource(Resources res, int resId, int reqWidth, int reqHeight)

Description

decode From Resource

Declaration

public static final Bitmap decodeFromResource(Resources res, int resId,
            int reqWidth, int reqHeight) 

Method Source Code

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.media.ExifInterface;
import android.media.ThumbnailUtils;
import android.util.Base64;
import android.view.View;

public class Main{
    public static final Bitmap decodeFromResource(Resources res, int resId,
            int reqWidth, int reqHeight) {
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeResource(res, resId, options);
        options.inSampleSize = inSampleSize(options, reqWidth, reqHeight);
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeResource(res, resId, options);
    }/*from w  w w .  j a v  a  2  s  .c o  m*/
    public static final Bitmap decodeFromResource(Resources res, int resId) {
        return BitmapFactory.decodeResource(res, resId);
    }
    public static final int inSampleSize(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) {
            if (width > height) {
                inSampleSize = Math.round((float) height
                        / (float) reqHeight);
            } else {
                inSampleSize = Math.round((float) width / (float) reqWidth);
            }

            final float totalPixels = width * height;
            final float totalReqPixelsCap = reqWidth * reqHeight * 2;

            while (totalPixels / (inSampleSize * inSampleSize) > totalReqPixelsCap) {
                inSampleSize++;
            }
        }
        return inSampleSize;
    }
}

Related

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