Android打开WIFI或者移动网络的代码实现

发表于2年前(2013-12-17 23:00)   阅读（799） | 评论（0） 14人收藏此文章, 我要收藏

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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 {      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);          toggleWiFi(this, false);          toggleMobileData(this, true);      }               //设置是否打开Wifi      private 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mService              connectivityManagerField = 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.AccessibleObject              connectivityManagerField.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/13509839              iConnectivityManagerObject = connectivityManagerField.get(connectivityManager);              //得到mService所属接口的Class              iConnectivityManagerClass = Class.forName(iConnectivityManagerObject.getClass().getName());              //取得IConnectivityManager接口中的setMobileDataEnabled(boolean)方法              //该方法来自java.lang.Class.getDeclaredMethod              setMobileDataEnabledMethod =               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.AccessibleObject              setMobileDataEnabledMethod.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>