Question

I’m trying to enable ADB (USB debugging) only when my application is running and disabling it when my application is not. I have full access to the phone and it is rooted, su available, etc., but I cannot find a way to do the toggling.

What I’ve tried so far:

Process proc = Runtime.getRuntime().exec(new String [] { "su", "-c", "setprop", "persist.service.adb.enable", "0"});
proc.waitFor();
Process proc2 = Runtime.getRuntime().exec(new String [] { "su", "-c", "stop", "adbd"});
proc2.waitFor();

This however causes the phone to enter a reboot loop instantaneously.

Answer 1

The code that works is easy:

Settings.Secure.putInt(getContentResolver(),Settings.Secure.ADB_ENABLED, 0); // 0 to disable, 1 to enable

Edit/Update:
Thanks to @MohanT for the following update:

Settings.Global.putInt(getContentResolver(),Settings.Global.ADB_ENABLED, 0); // 0 to disable, 1 to enable

However, the app needs to be a system app to be able to use this. To get out of having to sign it, build a custom rom, etc.. I did the following to get it to be a system app.

First, I installed it regularly using eclipse, then adb shell:

> su
# mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
# cat /data/app/filename.apk > /system/app/filename.apk
# mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system
# reboot