How To Invoke An Android Internal Method With Reflection

I'm trying to call an android internal method to reboot the device. It's just an experiment, I would try to understand what I'm doing wrong. I know there are probably better method

Solution 1:

It seems that you have different SDK implementation on your device checkthis implementation of the method rebootSystem(String resen) on:

https://android.googlesource.com/platform/frameworks/base.git/+/android-4.2.2_r1/services/java/com/android/server/Watchdog.java

/**
 * Perform a full reboot of the system.
 */voidrebootSystem(String reason) {
    Slog.i(TAG, "Rebooting system because: " + reason);
    PowerManagerService pms = (PowerManagerService) ServiceManager.getService("power");
    pms.reboot(false, reason, false);
}

and the implementation in the source code you provided on your question:

/**
 * Perform a full reboot of the system.
 */voidrebootSystem(String reason) {
    Slog.i(TAG, "Rebooting system because: " + reason);
    IPowerManager pms = (IPowerManager)ServiceManager.getService(Context.POWER_SERVICE);
    try {
        pms.reboot(false, reason, false);
    } catch (RemoteException ex) {
    }
}

that's why you got ClassCastException:

helloroot W/System.err﹕ Caused by: java.lang.ClassCastException: android.os.BinderProxy cannot be cast to com.android.server.power.PowerManagerService