从网络加载图片后处理图片源码

来源：互联网发布：何多苓知乎编辑：程序博客网时间：2024/05/17 22:04

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

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;

public class ImageHelp {

   private ImageView imgView;
   public void setBitmap(ImageView view,String urlStr){
       imgView=view;
       final String urlPath=urlStr;
       new Thread(new Runnable() {

           @Override
           public void run() {
               String url =urlPath;
               Bitmap bitmap = getHttpBitmap(url);
               Message message=handler.obtainMessage();
               message.arg1=1;
               message.obj=bitmap;
               message.sendToTarget();
           }
       }).start();
   }
   private Bitmap getHttpBitmap(String url){
            URL myFileURL;
            Bitmap bitmap=null;
            try{
                myFileURL = new URL(url);
               //获得连接
                HttpURLConnection conn=(HttpURLConnection)myFileURL.openConnection();
                //设置超时时间为6000毫秒，conn.setConnectionTiem(0);表示没有时间限制
                conn.setConnectTimeout(6000);
                //连接设置获得数据流
                conn.setDoInput(true);
                //不使用缓存
               conn.setUseCaches(false);
               //这句可有可无，没有影响
                //conn.connect();
                //得到数据流
                InputStream is = conn.getInputStream();
                //解析得到图片
                bitmap = BitmapFactory.decodeStream(is);
               //关闭数据流
               is.close();
            }catch(Exception e){
                e.printStackTrace();
            }

            return bitmap;

        }
   private Handler handler=new Handler(){
       @Override
       public void handleMessage(Message msg) {
           // TODO Auto-generated method stub
           super.handleMessage(msg);
           switch (msg.arg1) {
           case 1:
               Bitmap bitmap=(Bitmap) msg.obj;
               imgView.setImageBitmap(bitmap);
               break;

           default:
               break;
       }
   };
};
}

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