异步网络请求的封装

 1 public class MainActivity extends Activity {
 2     private String PATH = "https://www.baidu.com/";
 3     private TextView mTv;
 4     @Override
 5     protected void onCreate(Bundle savedInstanceState) {
 6         super.onCreate(savedInstanceState);
 7         setContentView(R.layout.activity_main);
 8         mTv = (TextView) findViewById(R.id.tv);
 9     }
10     public void request(View view) {
11         NetWorkUtils.request(PATH, new RequestCallBack() {
12             @Override
13             public void onSuccess(String data) {
14                 mTv.setText(data);
15             }
16         });
17     }
18 }

 1 public class NetWorkUtils {
 2 
 3     public interface RequestCallBack {
 4         public void onSuccess(String data);
 5     }
 6 
 7     public static void request(final String path, final RequestCallBack callBack) {
 8 
 9         final Handler handler = new Handler() {
10             @Override
11             public void handleMessage(Message msg) {
12                 String data = (String) msg.obj;
13                 callBack.onSuccess(data);
14             }
15         };
16 
17         new Thread() {
18             @Override
19             public void run() {
20                 try {
21                     URL url = new URL(path);
22 
23                     HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
24 
25                     conn.setReadTimeout(25000);
26                     conn.setConnectTimeout(25000);
27                     conn.setRequestMethod("GET");
28 
29                     int code = conn.getResponseCode();
30 
31                     if (code == 200) {
32                         InputStream is = conn.getInputStream();
33 
34                         ByteArrayOutputStream bos = new ByteArrayOutputStream();
35                         int len = 0;
36                         byte[] tmp = new byte[4096];
37 
38                         while ((len = is.read(tmp)) != -1) {
39                             bos.write(tmp, 0, len);
40                         }
41 
42                         is.close();
43 
44                         String str = bos.toString();
45 
46                         Message.obtain(handler, 1, str).sendToTarget();
47                     }
48                 } catch (MalformedURLException e) {
49                     e.printStackTrace();
50                 } catch (IOException e) {
51                     e.printStackTrace();
52                 }
53 
54             }
55         }.start();
56     }
57 }