I just rooted my device (verified :) ) and installed Linage 16 (Android 9).
The reason I did this is because I need to disable my mobile network and then reenable it to get a new and fresh IP address from my mobile service provider. This all has to be done automatically from within the app itself. So, manually disconnecting and reconnecting is not a solution for my particular case.
Therefore I did some research and I found for example this here that is supposed to enable mobile network toggling: https://stackoverflow.com/a/31488730/1020704
And this that explains how to request root privileges: https://stackoverflow.com/a/31488730/1020704
And this here that explains how to correctly setup the Manifest.xml: https://stackoverflow.com/a/31488730/1020704
So, what I get is something like this:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.app"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" tools:ignore="ProtectedPermissions"/>
<application....
And in my code I do the following:
public void toggleMobileNetwork(boolean mobileDataEnabled) {
try {
Process root = Runtime.getRuntime().exec("su");
TelephonyManager telephonyService = (TelephonyManager) getSystemService(this.TELEPHONY_SERVICE);
Method setMobileDataEnabledMethod = telephonyService.getClass().getDeclaredMethod("setDataEnabled", boolean.class);
if (null != setMobileDataEnabledMethod) {
setMobileDataEnabledMethod.invoke(telephonyService, mobileDataEnabled);
}
} catch (Exception ex) {
ex.getCause().printStackTrace();
}
}
When I execute this code I get the following exception:
W/System.err: java.lang.SecurityException: setUserDataEnabled
W/System.err: at android.os.Parcel.createException(Parcel.java:1950)
W/System.err: at android.os.Parcel.readException(Parcel.java:1918)
W/System.err: at android.os.Parcel.readException(Parcel.java:1868)
W/System.err: at com.android.internal.telephony.ITelephony$Stub$Proxy.setUserDataEnabled(ITelephony.java:4631)
W/System.err: at android.telephony.TelephonyManager.setDataEnabled(TelephonyManager.java:6453)
W/System.err: at android.telephony.TelephonyManager.setDataEnabled(TelephonyManager.java:6430)
W/System.err: at java.lang.reflect.Method.invoke(Native Method)
W/System.err: at com.example.app.MainActivity.toggleMobileNetwork(MainActivity.java:51)
W/System.err: at com.example.app.MainActivity.disableMobileNetwork(MainActivity.java:41)
W/System.err: at java.lang.reflect.Method.invoke(Native Method)
So, anybody has an idea what I have to do here?
