封装了一个关于ImageView的辅助类，该类可以方便实现网络图片下载的同时,动态设置图片尺寸、圆角.....一系列连贯的操作，无样式表，java代码实现所有功能，使用很方便。
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; }}
调用
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010 *11 *12 * */13 new ImageViewLoadAndSetSizeAndCircle().setImage(headerImage,"http://www.taopic.com/uploads/allimg/110928/41-11092PSF482.jpg",70,70,35);
下载地址：
http://download.csdn.net/detail/liaohang1987x/9726728
本人创业做的一款androidApp, 下载量已经有2000多万,各种当前热门的网络手机奖励红包全部集成，另外还有热门电影和淘宝高额优惠券！很适合各类型的用户。
