android 简单获取服务器数据
内容导读
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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 ="click" android:id ="@+id/button1" android:layout_width ="wrap_content" android:layout_height ="wrap_content" android:text ="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请求
package com.example.getserverdata.service; import java.io.InputStream; 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returnnull; } } catch (Exception e) { e.printStackTrace(); } returnnull; } }
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 = newbyte[1024]; int len = 0; try { while((len = is.read(data))!=-1) baos.write(data, 0, len); is.close(); baos.close(); returnnew String(baos.toByteArray()); } catch (Exception e) { e.printStackTrace(); } returnnull; } }
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 protectedvoid 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); } publicvoid click(View view) { final String username = et_username.getText().toString().trim(); final String password = et_password.getText().toString().trim(); new Thread(){ publicvoid run(){ final String result = LoginService.loginByGet(username, password); System.out.println("reuslt:"+result); if(result!=null) { runOnUiThread(new Runnable(){ @Override publicvoid run() { Toast.makeText(MainActivity.this, result, 0).show(); } }); } else { runOnUiThread(new Runnable(){ @Override publicvoid run() { Toast.makeText(MainActivity.this, "获取数据失败", 0).show(); } }); } } }.start(); } }
原文:http://www.cnblogs.com/zoro-zero/p/3950503.html
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