获取网络图片并异步更新UI

private Button button;private ImageView imageView;private String image_path &＃61; "http://ww1.sinaimg.cn/mw600/a84f073ajw1dvlhrku4ppj.jpg";private final int IS_FINISH &＃61; 1;private ProgressDialog progressDialog &＃61; null;private Handler handler &＃61; new Handler(){&＃64;Overridepublic void handleMessage(android.os.Message msg) {byte[] data &＃61; (byte[])msg.obj;Bitmap bm &＃61; BitmapFactory.decodeByteArray(data, 0, data.length);imageView.setImageBitmap(bm);if (msg.what &＃61;&＃61; IS_FINISH) {progressDialog.dismiss();}};};&＃64;Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);progressDialog &＃61; new ProgressDialog(this);progressDialog.setTitle("提示");progressDialog.setMessage("正在下载&＃xff0c;请稍后");progressDialog.setCancelable(false);button &＃61; (Button) this.findViewById(R.id.button1);imageView &＃61; (ImageView) this.findViewById(R.id.imageview1);button.setOnClickListener(new View.OnClickListener() {&＃64;Overridepublic void onClick(View v) {new Thread(new MyThread()).start();progressDialog.show();}});}public class MyThread implements Runnable{&＃64;Overridepublic void run() {HttpClient httpClient &＃61; new DefaultHttpClient();HttpGet httpGet &＃61; new HttpGet(image_path);HttpResponse httpResponse &＃61; null;try {httpResponse &＃61; httpClient.execute(httpGet);if (httpResponse.getStatusLine().getStatusCode() &＃61;&＃61; 200) {byte[] data &＃61; EntityUtils.toByteArray(httpResponse.getEntity());Message message &＃61; Message.obtain();message.obj &＃61; data;message.what &＃61; IS_FINISH;handler.sendMessage(message);}} catch (Exception e) {e.printStackTrace();}}}

线程中执行耗时操作&＃xff0c;handler中异步更新UI。网络获取图片、传递byte数组及byte数组转化为bitmap