图片压缩工具类

package edu.feicui.app.phone.base.util;


import java.io.InputStream;


import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;


/**
 * BitmapUtil
 * 
 * @author yuanc
 * 
 */
public class BitmapUtil {
public static Bitmap loadBitmap(String pathName, SizeMessage sizeMessage) {
// 加载的图像目标大小
int targetw = sizeMessage.getW();
int targeth = sizeMessage.getH();
Context context = sizeMessage.getContext();
Options options = new Options();
options.inJustDecodeBounds = true; // 打开"边界处理"
BitmapFactory.decodeFile(pathName, options);
int resw = options.outWidth;
int resh = options.outHeight;
if (resw <= targetw && resh <= targeth) {
options.inSampleSize = 1; // 设置加载时的资源比例
}
// 比例计算
else {
int scalew = resw / targetw;
int scaleh = resh / targeth;
int scale = scalew > scaleh ? scalew : scaleh;
options.inSampleSize = scale;// 设置加载时的资源比例
}
options.inJustDecodeBounds = false;// 关闭"边界处理"
Bitmap bitmap = BitmapFactory.decodeFile(pathName, options);
return bitmap;
}
public static Bitmap loadBitmap(int resID, SizeMessage sizeMessage) {
// 加载的图像目标大小
int targetw = sizeMessage.getW();
int targeth = sizeMessage.getH();
Context context = sizeMessage.getContext();
Options options = new Options();
options.inJustDecodeBounds = true; // 打开"边界处理"
BitmapFactory.decodeResource(context.getResources(), resID, options);
int resw = options.outWidth;
int resh = options.outHeight;
if (resw <= targetw && resh <= targeth) {
options.inSampleSize = 1; // 设置加载时的资源比例
}
// 比例计算
else {
int scalew = resw / targetw;
int scaleh = resh / targeth;
int scale = scalew > scaleh ? scalew : scaleh;
options.inSampleSize = scale;// 设置加载时的资源比例
}
options.inJustDecodeBounds = false;// 关闭"边界处理"
Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), resID, options);
return bitmap;
}


public static class SizeMessage {
private int w;
private int h;
private Context context;


/**
* 大小信息
* 
* @param context
* @param isPx
*            是否为像素单位
* @param w
* @param h
*/
public SizeMessage(Context context, boolean isPx, int w, int h) {
this.context = context;
if (!isPx) {
w = DeviceUtil.dp2px(context, w);
h = DeviceUtil.dp2px(context, h);
}
this.w = w;
this.h = h;
}


public Context getContext() {
return context;
}


public int getW() {
return w;
}


public void setW(int w) {
this.w = w;
}


public int getH() {
return h;
}


public void setH(int h) {
this.h = h;
}
}
}