Android打开WIFI或者移动网络的代码实现

MainActivity如下:

package wy.testnetwork;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import android.net.ConnectivityManager;import android.net.wifi.WifiManager;import android.os.Bundle;import android.app.Activity;import android.content.Context;/** * Demo描述: * 通过代码打开wifi或者移动网络 *  * 学习资料: * 1 http://blog.csdn.net/way_ping_li/article/details/8493700 * 2 http://stackoverflow.com/questions/12535101/how-can-i-turn-off-3g-data-programmatically-on-android * 3 http://www.cnblogs.com/willyan/archive/2012/07/03/2574513.html * 4 http://ask.csdn.net/questions/152 * 5 http://blog.csdn.net/lfdfhl/article/details/10311505 * 6 http://blog.csdn.net/tu_bingbing/article/details/8469871 * 7 http://blog.csdn.net/stevenhu_223/article/details/9052083 *   Thank you very much *    * 备注说明: * 1 在学习资料1中还涉及到利用代码打开GPS * 2 通过代码打开wifi和移动网络在某些机型上是不可实现的 * */public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);toggleWiFi(this, false);toggleMobileData(this, true);} //设置是否打开Wifiprivate void toggleWiFi(Context context, boolean enabled) {WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);wifiManager.setWifiEnabled(enabled);}/** * 设置是否打开移动网络 *  * 但没有直接的API可调用,但是我们发现: * 在ConnectivityManager中有一隐藏的方法setMobileDataEnabled() * 源码如下: * public void setMobileDataEnabled(boolean enabled) { *   try { *      mService.setMobileDataEnabled(enabled); *   } catch (RemoteException e) { *      } * } *  * 这里的重点就是mService,查看其声明: * private IConnectivityManager mService; * 继续查看源码可知IConnectivityManager为了一个AIDL(接口interface IConnectivityManager) *  *  * 调用过程: * ConnectivityManager中有一隐藏的方法setMobileDataEnabled() * 在setMobileDataEnabled()中调用了IConnectivityManager中的setMobileDataEnabled(boolean) *  * 所以我们首先需要反射出ConnectivityManager类的成员变量mService(IConnectivityManager类型) */private void toggleMobileData(Context context, boolean enabled) {      ConnectivityManager connectivityManager =     (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);        //ConnectivityManager类      Class<?> connectivityManagerClass = null;    //ConnectivityManager类中的字段      Field connectivityManagerField = null;            //IConnectivityManager接口    Class<?> iConnectivityManagerClass = null;    //IConnectivityManager接口的对象    Object iConnectivityManagerObject = null;    //IConnectivityManager接口的对象的方法    Method setMobileDataEnabledMethod = null;    try {//取得ConnectivityManager类connectivityManagerClass = Class.forName(connectivityManager.getClass().getName());//取得ConnectivityManager类中的字段mServiceconnectivityManagerField = connectivityManagerClass.getDeclaredField("mService");//取消访问私有字段的合法性检查 //该方法来自java.lang.reflect.AccessibleObjectconnectivityManagerField.setAccessible(true);//实例化mService//该get()方法来自java.lang.reflect.Field//一定要注意该get()方法的参数://它是mService所属类的对象//完整例子请参见://http://blog.csdn.net/lfdfhl/article/details/13509839iConnectivityManagerObject = connectivityManagerField.get(connectivityManager);//得到mService所属接口的ClassiConnectivityManagerClass = Class.forName(iConnectivityManagerObject.getClass().getName());//取得IConnectivityManager接口中的setMobileDataEnabled(boolean)方法//该方法来自java.lang.Class.getDeclaredMethodsetMobileDataEnabledMethod = iConnectivityManagerClass.getDeclaredMethod("setMobileDataEnabled", Boolean.TYPE);//取消访问私有方法的合法性检查 //该方法来自java.lang.reflect.AccessibleObjectsetMobileDataEnabledMethod.setAccessible(true);//调用setMobileDataEnabled方法setMobileDataEnabledMethod.invoke(iConnectivityManagerObject,enabled);} catch (ClassNotFoundException e) {       e.printStackTrace();  } catch (NoSuchFieldException e) {       e.printStackTrace();  } catch (SecurityException e) {       e.printStackTrace();  } catch (NoSuchMethodException e) {       e.printStackTrace();  } catch (IllegalArgumentException e) {       e.printStackTrace();  } catch (IllegalAccessException e) {       e.printStackTrace();  } catch (InvocationTargetException e) {       e.printStackTrace();  } }}

AndroidManifest.xml如下:

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="wy.testnetwork"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="10"        android:targetSdkVersion="10" />        <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="wy.testnetwork.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>

main.xml如下:

<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=".MainActivity" >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="通过代码打开wifi或者移动网络"         android:layout_centerHorizontal="true"        android:layout_marginTop="50dip"    /></RelativeLayout>