How to enable data connection on Android 2.3

Question

Referring to How to disable Mobile Data on Android , we know the approach to enable/disable data connection in Android 2.2 by java reflection. However, in Android 2.3 and up

Answer 1

You also need to add

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

to the manifest.xml

Answer 2

ConnectivityManager mgr = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
Method dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class);
dataMtd.setAccessible(true);
dataMtd.invoke(mgr, true/false); 

you need android.permission.CHANGE_NETWORK_STATE permission too

Answer 3

In your androidmanifest.xml:

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> 

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