1、activity_main.xml
<LinearLayout 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"
android:orientation="vertical"
tools:context="com.example.getserverdata.MainActivity" >
<EditText
android:id="@+id/et_username"
android:hint="请输入用户名"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
</EditText>
<EditText
android:id="@+id/et_password"
android:hint="请输入密码"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPassword" />
<Button
android:onClick="click1"
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="get方式登录" />
<Button
android:onClick="click2"
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="post方式登录" />
</LinearLayout>
2.AndroidManifest.xml 配置权限
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.getserverdata"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
3.get和post请求
package com.example.getserverdata.service;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import com.example.getserverdata.utils.StreamUtil;
public class LoginService {
public static String loginByGet(String username,String password)
{
String path = "http://192.168.1.100:8088/Login.ashx?username="+username+"&password="+password;
try {
//创建URL
URL url = new URL(path);
//创建http连接
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//设置连接时间
conn.setConnectTimeout(5000);
//设置请求方式
conn.setRequestMethod("GET");
//获取请求码
int code = conn.getResponseCode();
System.out.println("code:"+code);
if(code==200)
{
//请求成功
//获取响应数据
InputStream is = conn.getInputStream();
//得到响应数据
String result = StreamUtil.readInputStream(is);
return result;
}
else
{
//请求失败
return null;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static String loginByPost(String username,String password)
{
String path = "http://192.168.1.100:8088/Login.ashx";
try {
//创建URL
URL url = new URL(path);
//创建http连接
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//设置连接时间
conn.setConnectTimeout(5000);
//设置请求方式
conn.setRequestMethod("POST");
//准备数据
String data = "username="+username+"&password="+password;
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Lenght", data.length()+"");
//post方式 实际上是浏览器把数据写给了服务器
conn.setDoOutput(true);
OutputStream os = conn.getOutputStream();
os.write(data.getBytes());
//获取请求码
int code = conn.getResponseCode();
System.out.println("code:"+code);
if(code==200)
{
//请求成功
//获取响应数据
InputStream is = conn.getInputStream();
//得到响应数据
String result = StreamUtil.readInputStream(is);
return result;
}
else
{
//请求失败
return null;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
4.将InputStream转为String
package com.example.getserverdata.utils;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
public class StreamUtil {
public static String readInputStream(InputStream is)
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] data = new byte[1024];
int len = 0;
try {
while((len = is.read(data))!=-1)
baos.write(data, 0, len);
is.close();
baos.close();
return new String(baos.toByteArray());
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
5.MainActivity
package com.example.getserverdata;
import com.example.getserverdata.service.LoginService;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
private EditText et_username;
private 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);
}
public void click1(View view)
{
final String username = et_username.getText().toString().trim();
final String password = et_password.getText().toString().trim();
new Thread(){
public void run(){
final String result = LoginService.loginByGet(username, password);
System.out.println("reuslt:"+result);
if(result!=null)
{
runOnUiThread(new Runnable(){
@Override
public void run() {
Toast.makeText(MainActivity.this, result, 0).show();
}
});
}
else
{
runOnUiThread(new Runnable(){
@Override
public void run() {
Toast.makeText(MainActivity.this, "获取数据失败", 0).show();
}
});
}
}
}.start();
}
public void click2(View view)
{
final String username = et_username.getText().toString().trim();
final String password = et_password.getText().toString().trim();
new Thread(){
public void run(){
final String result = LoginService.loginByPost(username, password);
System.out.println("reuslt:"+result);
if(result!=null)
{
runOnUiThread(new Runnable(){
@Override
public void run() {
Toast.makeText(MainActivity.this, result, 0).show();
}
});
}
else
{
runOnUiThread(new Runnable(){
@Override
public void run() {
Toast.makeText(MainActivity.this, "获取数据失败", 0).show();
}
});
}
}
}.start();
}
}
