如何在Android上以编程方式关闭3G /数据？

Question

如何在Android上以编程方式关闭3G /数据？

不是Wifi，而是3G /数据。

Answer 1

没有正式的方法可以做到这一点。 但是，它可以通过反射非正式地实现。

对于Android 2.3及更高版本：

private void setMobileDataEnabled(Context context, boolean enabled) {
    final ConnectivityManager conman = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    final Class conmanClass = Class.forName(conman.getClass().getName());
    final Field iConnectivityManagerField = conmanClass.getDeclaredField("mService");
    iConnectivityManagerField.setAccessible(true);
    final Object iConnectivityManager = iConnectivityManagerField.get(conman);
    final Class iConnectivityManagerClass = Class.forName(iConnectivityManager.getClass().getName());
    final Method setMobileDataEnabledMethod = iConnectivityManagerClass.getDeclaredMethod("setMobileDataEnabled", Boolean.TYPE);
    setMobileDataEnabledMethod.setAccessible(true);

    setMobileDataEnabledMethod.invoke(iConnectivityManager, enabled);
}

这还需要以下许可。

 <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>

适用于Android 2.2及以下版本：

Method dataConnSwitchmethod;
Class telephonyManagerClass;
Object ITelephonyStub;
Class ITelephonyClass;

TelephonyManager telephonyManager = (TelephonyManager) context
        .getSystemService(Context.TELEPHONY_SERVICE);

if(telephonyManager.getDataState() == TelephonyManager.DATA_CONNECTED){
    isEnabled = true;
}else{
    isEnabled = false;  
}   

telephonyManagerClass = Class.forName(telephonyManager.getClass().getName());
Method getITelephonyMethod = telephonyManagerClass.getDeclaredMethod("getITelephony");
getITelephonyMethod.setAccessible(true);
ITelephonyStub = getITelephonyMethod.invoke(telephonyManager);
ITelephonyClass = Class.forName(ITelephonyStub.getClass().getName());

if (isEnabled) {
    dataConnSwitchmethod = ITelephonyClass
            .getDeclaredMethod("disableDataConnectivity");
} else {
    dataConnSwitchmethod = ITelephonyClass
            .getDeclaredMethod("enableDataConnectivity");   
}
dataConnSwitchmethod.setAccessible(true);
dataConnSwitchmethod.invoke(ITelephonyStub);

这需要以下许可：

<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />

请注意，这些都是非官方的，可能不再有效。 应该不再需要这种破坏的证据，因为2.2及以下方法打破了2.3。

Answer 2

使用try / catch块包围代码

public void mobiledataenable(boolean enabled) {

try { 
        final ConnectivityManager conman = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
        final Class<?> conmanClass = Class.forName(conman.getClass().getName());
        final Field iConnectivityManagerField = conmanClass.getDeclaredField("mService");
        iConnectivityManagerField.setAccessible(true);
        final Object iConnectivityManager = iConnectivityManagerField.get(conman);
        final Class<?> iConnectivityManagerClass = Class.forName(iConnectivityManager.getClass().getName());
        final Method setMobileDataEnabledMethod = iConnectivityManagerClass.getDeclaredMethod("setMobileDataEnabled", Boolean.TYPE);
        setMobileDataEnabledMethod.setAccessible(true);
        setMobileDataEnabledMethod.invoke(iConnectivityManager, enabled);
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }     
}

在Manifest中，添加以下权限：

<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>

Answer 3

 public void onClick(View view){
        ConnectivityManager dataManager;
        dataManager  = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
        Method dataMtd = null;
        try {
            dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class);
        } catch (NoSuchMethodException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        dataMtd.setAccessible(true);
        try {
            dataMtd.invoke(dataManager, true);
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }   
    }

Answer 4

我还在2.1，所以这个解决方案适合我。

但是你还需要包含MODIFY_PHONE_STATE permision。

完整代码（带有toogle按钮）2.1：

package com.rivaldo.turn3gonoff;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.telephony.TelephonyManager;
import android.view.Menu;
import android.widget.CompoundButton;
import android.widget.ToggleButton;

public class Turn3GOnOff extends Activity {

Method dataConnSwitchmethod_ON;
Method dataConnSwitchmethod_OFF;
Class telephonyManagerClass;
Object ITelephonyStub;
Class ITelephonyClass;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_turn3_gon_off);

    GetDataConnectionAPI();

    ToggleButton toggle = (ToggleButton) findViewById(R.id.toggleButton);
    toggle.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked) {
                turn3GOn();
            } else {
                turn3GOff();
            }
        }
    });

}

private void GetDataConnectionAPI() {
    this.getApplicationContext();
    TelephonyManager telephonyManager = 
                    (TelephonyManager) this.getApplicationContext().
                                              getSystemService(Context.TELEPHONY_SERVICE);

    try {
        telephonyManagerClass = Class.forName(telephonyManager.getClass().getName());
        Method getITelephonyMethod = telephonyManagerClass.getDeclaredMethod("getITelephony");
        getITelephonyMethod.setAccessible(true);
        ITelephonyStub = getITelephonyMethod.invoke(telephonyManager);
        ITelephonyClass = Class.forName(ITelephonyStub.getClass().getName());

        dataConnSwitchmethod_OFF = 
                        ITelephonyClass.getDeclaredMethod("disableDataConnectivity");
        dataConnSwitchmethod_ON = ITelephonyClass.getDeclaredMethod("enableDataConnectivity");   
    } catch (Exception e) { // ugly but works for me
        e.printStackTrace();
    }
}
private void turn3GOn() {
    dataConnSwitchmethod_ON.setAccessible(true);
    try {
        dataConnSwitchmethod_ON.invoke(ITelephonyStub);
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        e.printStackTrace();
    }
}

private void turn3GOff() {
    dataConnSwitchmethod_OFF.setAccessible(true);
    try {
        dataConnSwitchmethod_OFF.invoke(ITelephonyStub);
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        e.printStackTrace();
    }
}

}

的Manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.rivaldo.turn3gonoff"
android:versionCode="1"
android:versionName="1.0" >

<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />
<uses-sdk
    android:minSdkVersion="7"
    android:targetSdkVersion="7" />
<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.rivaldo.turn3gonoff.Turn3GOnOff"
        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>

activity_turn3_gon_off.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context=".Turn3GOnOff" >

<ToggleButton
    android:id="@+id/toggleButton"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginTop="60dp"
    android:textOn="3G on"
    android:textOff="3G off"
    android:text="ToggleButton" />

</RelativeLayout>