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;
        }
    }
}