Android Bitmap Compress downsampleBitmap(FileDescriptor fd, int maxArea)

Description

downsample Bitmap

License

Open Source License

Declaration

public static Bitmap downsampleBitmap(FileDescriptor fd, int maxArea) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.FileDescriptor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

import android.graphics.Rect;

public class Main {
    public static Bitmap downsampleBitmap(FileDescriptor fd, int maxArea) {
        BitmapFactory.Options opts = new BitmapFactory.Options();
        opts.inJustDecodeBounds = true;/*from  w  ww.j a  v a2  s . c  om*/

        Rect outRect = new Rect();
        BitmapFactory.decodeFileDescriptor(fd, outRect, opts);

        int subsample = 1;
        int width = opts.outWidth;
        int height = opts.outHeight;
        while (width * height > maxArea) {
            width /= 2;
            height /= 2;
            subsample++;
        }

        opts.inJustDecodeBounds = false;
        opts.inSampleSize = subsample;
        Bitmap retval = BitmapFactory.decodeFileDescriptor(fd, null, opts);
        return retval;
    }
}

Related

1. compressBitmap(Bitmap bitmap)
2. compressToBytes(Bitmap bitmap, int quality)
3. compress(String srcPath, String dstPath, int maxWidth, int maxHeight, long maxSize, CompressFormat format)
4. compress(byte[] data, String dstPath, int maxWidth, int maxHeight, long maxSize, CompressFormat format)
5. decodeToCompressedByteArray(String imageUri)