Latest update on enabling and disabling mobile data programmatically [duplicate]

Question

It wont work on non-rooted phone as they added MODIFY_PHONE_STATE permission check. This permission is only given to system or signature apps refer-here.

Check the code below from PhoneInterfaceManager:

   @Override
   public void setDataEnabled(boolean enable) {
       enforceModifyPermission();
       mPhone.setDataEnabled(enable);
   }
   private void enforceModifyPermission() {
       mApp.enforceCallingOrSelfPermission(android.Manifest.permission.MODIFY_PHONE_STATE, null);
   }

Unless you have a rooted phone I don't think you can enable and disable data programmatically because in order to do so we have to include MODIFY_PHONE_STATE permission which is only given to system or signature apps.

setMobileDataEnabled() method is no longer callable via reflection. It was callable since Android 2.1 (API 7) to Android 4.4 (API 19) via reflection, but as of Android 5.0 and later, even with the rooted phones, the setMobileDataEnabled() method is not callable.

Fast forward to the end of 2018...

The short answer is it is no longer allowed to enable/disable mobile data programmatically. Here is the solution that I use all the time.

This code opens system data usage settings screen, where the user can disable mobile data manually.

public void enableDisableMobileData() {
    Intent intent = new Intent();
    intent.setComponent(new ComponentName(
        "com.android.settings", 
        "com.android.settings.Settings$DataUsageSummaryActivity"));
    startActivity(intent);
}

EDIT 2019:

The answer above does not work starting on API 28. This is what works:

Intent intent = new Intent(Settings.ACTION_DATA_USAGE_SETTINGS);
startActivity(intent);

None of the above worked for me, but if your device is rooted, you may use this for enabling it.

private void enableMobileData(){

        try {
            String[] cmds = {"svc data enable"};
            Process p = Runtime.getRuntime().exec("su");
            DataOutputStream os = new DataOutputStream(p.getOutputStream());
            for (String tmpCmd : cmds) {
                os.writeBytes(tmpCmd + "\n");
            }
            os.writeBytes("exit\n");
            os.flush();
        } catch (Exception e) {
            e.printStackTrace();
        }

}

And this for disabling it:

private void disableMobileData(){

    try {
        String[] cmds = {"svc data disable"};
        Process p = Runtime.getRuntime().exec("su");
        DataOutputStream os = new DataOutputStream(p.getOutputStream());
        for (String tmpCmd : cmds) {
            os.writeBytes(tmpCmd + "\n");
        }
        os.writeBytes("exit\n");
        os.flush();
    } catch (Exception e) {
        e.printStackTrace();
    }

}