compress Bitmap - Android Graphics

Android examples for Graphics:Bitmap Compress

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Description

compress Bitmap

Demo Code


//package com.java2s;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

public class Main {
    public static Bitmap comp(Bitmap image) {

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        if (baos.toByteArray().length / 1024 > 800) {//1M,BitmapFactory.decodeStream    
            baos.reset();//baosbaos  
            image.compress(Bitmap.CompressFormat.JPEG, 50, baos);//50%baos  
        }//  w ww  . j av a 2 s. com
        ByteArrayInputStream isBm = new ByteArrayInputStream(
                baos.toByteArray());
        BitmapFactory.Options newOpts = new BitmapFactory.Options();
        //options.inJustDecodeBounds true  
        newOpts.inJustDecodeBounds = true;
        Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, newOpts);
        newOpts.inJustDecodeBounds = false;
        int w = newOpts.outWidth;
        int h = newOpts.outHeight;
        //800*480  
        float hh = 800f;//800f  
        float ww = 480f;//480f 
        //  
        int be = 1;//be=1  
        if (w > h && w > ww) {//  
            be = (int) (newOpts.outWidth / ww);
        } else if (w < h && h > hh) {//  
            be = (int) (newOpts.outHeight / hh);
        }
        if (be <= 0)
            be = 1;
        newOpts.inSampleSize = be;//  
        //options.inJustDecodeBounds false  
        isBm = new ByteArrayInputStream(baos.toByteArray());
        bitmap = BitmapFactory.decodeStream(isBm, null, newOpts);
        return compressImage(bitmap);//  
    }

    public static Bitmap compressImage(Bitmap image) {

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        image.compress(Bitmap.CompressFormat.JPEG, 80, baos);//100baos  
        int options = 100;
        while (baos.toByteArray().length / 1024 > 100) { //100kb,         
            baos.reset();//baosbaos  
            image.compress(Bitmap.CompressFormat.JPEG, options, baos);//options%baos  
            options -= 10;//10  
        }
        ByteArrayInputStream isBm = new ByteArrayInputStream(
                baos.toByteArray());//baosByteArrayInputStream  
        Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);//ByteArrayInputStream  
        return bitmap;
    }
}

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