android ImageView网络图片加载、动态设置尺寸、圆角..

     

本人开发的开发者技术变现资源聚集地,大家支持下，下面是网址

https://www.baiydu.com

  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

                ImageView headerImage = ( ImageView ) convertView.findViewById(R.id.headerImage);

                /*
                *   下面方法参数说明:
                *               1=加载图片的ImageView
                *               2=图片下载地址
                *               3=动态设置的图片宽度
                *               4=动态设置的图片高度
                *               5=圆角尺寸，这里如果不圆角参数填0
                *
                *
                * */
                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。