复习URLHttpConnection方式GET，POST方式链接网络解析uri

xml:

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context="com.xh.tx.postget.MainActivity" >
 
   <EditText
       android:id="@+id/et_username"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:hint="请输入用户名"
 
       />
   <EditText
       android:id="@+id/et_password"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:layout_below="@id/et_username"
       android:hint="请输入密码"
 
       />
 
   <Button
       android:id="@+id/bt_get"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:layout_below="@id/et_password"
       android:text="GET提交"
       />
 
     <Button
       android:id="@+id/bt_post"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:layout_below="@id/bt_get"
       android:text="POST提交"
       />
 
 </RelativeLayout>

NetUtils:

 package com.xh.tx.netUtils;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.HttpURLConnection;
 import java.net.ProtocolException;
 import java.net.URL;
 import java.net.URLEncoder;
 
 public class NetUtils
 {
     public static String getSubmit(String username,String password,String uri)
     {
         uri = uri +"?username=" + username + "&password=" + password;
 
         HttpURLConnection conn =  getHttpURLConnection(uri);
         // http://localhost:8080/TestServlet?username=zs&password=123
 
         try {
             conn.setConnectTimeout(30000);
             conn.setReadTimeout(30000);
             conn.setRequestMethod("GET");
 
             conn.connect(); //连接 连接的时候是否要传递参数过去
 
             //先判断一下状态是否为200,如果为200则将in流转换为字符串
             if(conn.getResponseCode() == 200)
             {
                 String content = getStringFromInputStream(conn.getInputStream());
 
                 return content;
             }
 
         } catch (ProtocolException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         }
 
         return null;
     }
 
     private static String getStringFromInputStream(InputStream inputStream) throws IOException
     {
         byte[] buffer = new byte[1024];
         ByteArrayOutputStream bytearray = new ByteArrayOutputStream();
         int len = 0;
 
         while((len = inputStream.read(buffer, 0, 1024)) != -1)
         {
             bytearray.write(buffer);
         }
 
     //    String content = new String(bytearray.toByteArray(),"GBK");
 
         return bytearray.toString();
     }
 
     public static String postSubmit(String username,String password, String uri)
     {
         HttpURLConnection conn =  getHttpURLConnection(uri);
 
         try {
             conn.setConnectTimeout(30000);
             conn.setReadTimeout(30000);
             conn.setRequestMethod("POST");
             //如果你要兼容2.3版本，那么你必须添加一下这句话
             conn.setDoInput(true);
 
             //参数传递
             OutputStream out = conn.getOutputStream();
 
             conn.connect();
             out.write(("username="+username + "&password=" + password).getBytes());
 
             if(conn.getResponseCode() == 200)
             {
                 String content = getStringFromInputStream(conn.getInputStream());
                 return content;
             }
         } catch (ProtocolException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         }
 
         return null;
     }
 
     public static HttpURLConnection getHttpURLConnection(String uri)
     {
         try {
             URL url = new URL(uri);
             HttpURLConnection conn = (HttpURLConnection) url.openConnection();
 
             return conn;
         } catch (IOException e) {
             e.printStackTrace();
         }
         return null;
 
     }
 }

MainActivity:

 package com.xh.tx.postget;
 
 import com.xh.tx.netUtils.NetUtils;
 
 import android.app.Activity;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.EditText;
 import android.widget.Toast;
 
 public class MainActivity extends Activity implements OnClickListener {
 
     EditText et_username;
     EditText et_password;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
         et_username = (EditText) findViewById(R.id.et_username);
         et_password = (EditText) findViewById(R.id.et_password);
 
         findViewById(R.id.bt_get).setOnClickListener(this);
         findViewById(R.id.bt_post).setOnClickListener(this);
 
     }
 
     @Override
     public void onClick(View v)
     {
         final String username = et_username.getText().toString();
         final String password = et_password.getText().toString();
 
         switch (v.getId()) {
         case R.id.bt_get:
             new Thread(new Runnable()
             {
                 @Override
                 public void run()
                 {
                     final String status = NetUtils.getSubmit(username, password,"http://10.0.2.2:8080/baidu/LoginServelt");
 
                     runOnUiThread(new Runnable() {
                         @Override
                         public void run()
                         {
                             Toast.makeText(MainActivity.this, "返回的状态为:" + status, 0).show();
                         }
                     });
                 }
             }).start();
             break;
         case R.id.bt_post:
             new Thread(new Runnable()
             {
                 @Override
                 public void run()
                 {
                     final String status = NetUtils.postSubmit(username, password,"http://10.0.2.2:8080/baidu/LoginServelt");
 
                     runOnUiThread(new Runnable() {
                         @Override
                         public void run()
                         {
                             Toast.makeText(MainActivity.this, "返回的状态为:" + status, 0).show();
                         }
                     });
                 }
             }).start();
             break;
 
         default:
             break;
         }
     }
 }