直接上代码 1 package org.lxh.server; 2 3 import java.io.ByteArrayOutputStream; 4 import java.io.InputStream; 5 import java.net.HttpURLConnection ...
直接上代码
1 package org.lxh.server; 2 3 import java.io.ByteArrayOutputStream; 4 import java.io.InputStream; 5 import java.net.HttpURLConnection; 6 import java.net.URL; 7 8 import org. 9 10 import android.app.Activity;11 import android.graphics.Bitmap;12 import android.graphics.BitmapFactory;13 import android.os.Bundle;14 import android.os.StrictMode;15 import android.widget.ImageView;16 17 /**18 * 19 * @author Administrator 从网上下载图片然后展示在屏幕上20 * 21 */22 23 public class MyWebDemo extends Activity {24 private static final String PATH = "http://a.hiphotos.baidu.com/album/w%3D2048/sign=5c4fe8d4a5c27d1ea5263cc42fedac6e/024f78f0f736afc3f1416515b219ebc4b7451274.jpg";25 private ImageView img = null;26 27 @Override28 protected void onCreate(Bundle savedInstanceState) {29 // TODO Auto-generated method stub30 super.onCreate(savedInstanceState);31 super.setContentView(R.layout.main_http);32 this.img = (ImageView) super.findViewById(R.id.img);33 34 StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()35 .detectDiskReads().detectDiskWrites().detectNetwork()36 .penaltyLog().build());37 StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()38 .detectLeakedSqlLiteObjects().detectLeakedClosableObjects()39 .penaltyLog().penaltyDeath().build());40 try {41 byte data[] = this.getUrlData();42 Bitmap bm = BitmapFactory.decodeByteArray(data, 0, data.length);43 this.img.setImageBitmap(bm);44 } catch (Exception e) {45 e.printStackTrace();46 }47 }48 49 public byte[] getUrlData() throws Exception {50 ByteArrayOutputStream bos = null;51 try {52 //定义URl53 URL url = new URL(PATH);54 //定义内存输入流55 bos = new ByteArrayOutputStream();56 //每次读取1024个57 byte data[] = new byte[1024];58 //打开59 HttpURLConnection conn = (HttpURLConnection) url.openConnection();60 //取得输入流61 InputStream inputStream = conn.getInputStream();62 int len = 0;63 //读取到底部64 while ((len = inputStream.read(data)) != -1) {65 bos.write(data, 0, len);66 }67 //变成字节数组返回68 return bos.toByteArray();69 } catch (Exception e) {70 throw e;71 } finally {72 if (bos != null) {73 //关闭流74 bos.close();75 }76 }77 }78 }
原标题:从网上加载图片然后展示在屏幕上
关键词:图片
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