Android: Enable/Disable 3G programmatically

Here we go again,

Hint: this post will be just a wrap up to what you can find here.

Unfortunately, the data-connection enable/disable APIs are not exposed to the user, So we'll access them using JAVA reflection.

Starting from API level 8 (platform 2.2) we can use the following snippet:

 final ConnectivityManager conman =   
    (ConnectivityManager) context.getSystemService(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);   
      
 // (true) to enable 3G; (false) to disable it.   
 setMobileDataEnabledMethod.invoke(iConnectivityManager, true);   

We need to add the following permission to the manifest file

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

Hint: the previous piece of code was tested on SAMSUNG GALAXY SII API level 9(platform 2.3).

Ok, now I'll post another snippet that I got it working on the emulator for APIs levels prior to (8):

 Method dataConnSwitchmethod;  
 Class telephonyManagerClass;  
 Object ITelephonyStub;  
 Class ITelephonyClass;  
    
 TelephonyManager telephonyManager = (TelephonyManager) 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) {  
    // if you want to disable it.  
    dataConnSwitchmethod =  ITelephonyClass.getDeclaredMethod("disableDataConnectivity");  
 } else {  
    // if you want to enable it.  
    dataConnSwitchmethod = ITelephonyClass.getDeclaredMethod("enableDataConnectivity");  
 }  
    
 dataConnSwitchmethod.setAccessible(true);  
 dataConnSwitchmethod.invoke(ITelephonyStub);  

That's it, don't hesitate to comment, to share your knowledge and to correct me.

Posted in Android