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

<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>

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;

}
}

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;
}
}
}