android ImageView网络图片加载、动态设置尺寸、圆角..

package com.example.hangliao.oneyuanrecharge.helper;

import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class ImageViewLoadAndSetSizeAndCircle {

private PicHandler pic_hdl;
private ImageView imgView;
private String url;

private  int widht;

private  int height;

private int CircleSize;

/**
* 通过图片url路径获取图片并显示到对应控件上
*
* @param imgView
* @param url
*/
public void setImage(ImageView imgView, String url,int widht,int height,int CircleSize) {
this.url = url;
this.imgView = imgView;
this.widht=widht;
this.height=height;
this.CircleSize=CircleSize;
pic_hdl = new PicHandler();

Thread t = new LoadPicThread();

t.start();
}

class LoadPicThread extends Thread {
@Override
public void run() {
Bitmap img = getUrlImage(url);
System.out.println(img + "---");
Message msg = pic_hdl.obtainMessage();
msg.what = 0;
msg.obj = img;
pic_hdl.sendMessage(msg);
}
}

class PicHandler extends Handler {

@Override
public void handleMessage(Message msg) {
Bitmap myimg = (Bitmap) msg.obj;
imgView.setImageBitmap(myimg);
}

}

public Bitmap getUrlImage(String url) {
Bitmap img = null;
try {
URL picurl = new URL(url);
HttpURLConnection conn = (HttpURLConnection) picurl
.openConnection();
conn.setConnectTimeout(6000);
conn.setDoInput(true);
conn.setUseCaches(false);
conn.connect();
InputStream is = conn.getInputStream();
img = BitmapFactory.decodeStream(is);
is.close();
} catch (Exception e) {
e.printStackTrace();
}

img=zoomImage(img,this.widht,this.height);
return img;
}

public   Bitmap zoomImage(Bitmap bgimage, double newWidth,
double newHeight) {
// 获取这个图片的宽和高
float width = bgimage.getWidth();
float height = bgimage.getHeight();
// 创建操作图片用的matrix对象
Matrix matrix = new Matrix();
// 计算宽高缩放率
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// 缩放图片动作
matrix.postScale(scaleWidth, scaleHeight);
Bitmap bitmap = Bitmap.createBitmap(bgimage, 0, 0, (int) width,
(int) height, matrix, true);

if (CircleSize>0) //需要圆角
{
bitmap=bitmapRound(bitmap,CircleSize);
}
else  //不需要圆角
{

}

return bitmap;
}

private Bitmap bitmapRound(Bitmap mBitmap,float CircleSize){
Bitmap bitmap = Bitmap.createBitmap(mBitmap.getWidth(), mBitmap.getHeight(), Config.ARGB_4444);

Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
paint.setAntiAlias(true);

//设置矩形大小
Rect rect = new Rect(0,0,mBitmap.getWidth(),mBitmap.getHeight());
RectF rectf = new RectF(rect);

// 相当于清屏
canvas.drawARGB(0, 0, 0, 0);
//画圆角
canvas.drawRoundRect(rectf, CircleSize, CircleSize, paint);
// 取两层绘制，显示上层
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));

// 把原生的图片放到这个画布上，使之带有画布的效果
canvas.drawBitmap(mBitmap, rect, rect, paint);
return bitmap;

}
}

1                 ImageView headerImage = ( ImageView ) convertView.findViewById(R.id.headerImage);
2
3                 /*
4                 *   下面方法参数说明:
5                 *               1=加载图片的ImageView
6                 *               2=图片下载地址
7                 *               3=动态设置的图片宽度
8                 *               4=动态设置的图片高度
9                 *               5=圆角尺寸，这里如果不圆角参数填0
10                 *
11                 *
12                 * */
13                 new ImageViewLoadAndSetSizeAndCircle().setImage(headerImage,"http://www.taopic.com/uploads/allimg/110928/41-11092PSF482.jpg",70,70,35);

http://download.csdn.net/detail/liaohang1987x/9726728