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(); } }