public Bitmap getInternetPicture(String UrlPath) {Bitmap bm = null;// 1、确定网址// http://pic39.nipic.com/20140226/18071023_164300608000_2.jpgString urlpath = UrlPath;// 2、获取Uritry {URL uri = new URL(urlpath);// 3、获取连接对象、此时还没有建立连接HttpURLConnection connection = (HttpURLConnection) uri.openConnection();// 4、初始化连接对象// 设置请求的方法，注意大写connection.setRequestMethod("GET");// 读取超时connection.setReadTimeout(5000);// 设置连接超时connection.setConnectTimeout(5000);// 5、建立连接connection.connect();// 6、获取成功判断,获取响应码if (connection.getResponseCode() == 200) {// 7、拿到服务器返回的流，客户端请求的数据，就保存在流当中InputStream is = connection.getInputStream();// 8、从流中读取数据，构造一个图片对象GoogleAPIbm = BitmapFactory.decodeStream(is);// 9、把图片设置到UI主线程// ImageView中,获取网络资源是耗时操作需放在子线程中进行,通过创建消息发送消息给主线程刷新控件；Log.i("", "网络请求成功");} else {Log.v("tag", "网络请求失败");bm = null;}} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return bm;}

public void onClick(View v){new Thread(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubString urlpath = "http://pic39.nipic.com/20140226/18071023_164300608000_2.jpg";Bitmap bm = getInternetPicture(urlpath);Message msg = new Message();// 把bm存入消息中,发送到主线程msg.obj = bm;handler.sendMessage(msg);}}).start();}</span>

三、 主线程处理消息队列中的消息，并刷新相应UI控件

Handler handler = new Handler() {public void handleMessage(android.os.Message msg) {ImageView imgView = (ImageView) findViewById(R.id.internet_imageview);imgView.setImageBitmap((Bitmap) msg.obj);};};</span>

四、获取网络图片，采用缓存保存文件

<span style="font-size:18px;">public Bitmap getInternetPicture(String UrlPath) {Bitmap bm = null;// 1、确定网址// http://pic39.nipic.com/20140226/18071023_164300608000_2.jpgString urlpath = UrlPath;// 2、获取Uritry {URL uri = new URL(urlpath);// 3、获取连接对象、此时还没有建立连接HttpURLConnection connection = (HttpURLConnection) uri.openConnection();// 4、初始化连接对象// 设置请求的方法，注意大写connection.setRequestMethod("GET");// 读取超时connection.setReadTimeout(5000);// 设置连接超时connection.setConnectTimeout(5000);// 5、建立连接connection.connect();// 6、获取成功判断,获取响应码if (connection.getResponseCode() == 200) {// 7、拿到服务器返回的流，客户端请求的数据，就保存在流当中InputStream is = connection.getInputStream();// 8、开启文件输出流，把读取到的字节写到本地缓存文件File file = new File(getCacheDir(), getFileName(urlpath));FileOutputStream fos = new FileOutputStream(file);int len = 0;byte[] b = new byte[1024];while ((len = is.read(b)) != -1) {fos.write(b, 0, len);}fos.close();is.close();//9、 通过图片绝对路径，创建Bitmap对象bm = BitmapFactory.decodeFile(file.getAbsolutePath());Log.i("", "网络请求成功");} else {Log.v("tag", "网络请求失败");bm = null;}} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return bm;}public String getFileName(String path) {int index = path.lastIndexOf("/");return path.substring(index + 1);}
}</span>