//關機
    private void shutdown(){
        try{
            Class ServiceManager = Class.forName("android.os.ServiceManager");
            Method getService =  ServiceManager.getMethod("getService",java.lang.String.class);
            Object object = getService.invoke(null,Context.POWER_SERVICE);
 

            Class cStub = Class.forName("android.os.IPowerManager$Stub");
            Method asInterface = cStub.getMethod("asInterface",android.os.IBinder.class);
            Object oIPower = asInterface.invoke(null,object);
            Method shutdown = oIPower.getClass().getMethod("shutdown",boolean
 
.class,boolean.class);
            shutdown.invoke(oIPower,false,true);
        }catch (Exception e){
            Log.e(TAG, Log.getStackTraceString(e));
        }
    }

//重啟
Intent iReboot = new Intent(Intent.ACTION_REBOOT);
iReboot.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
__mainActivity.startActivity
 
(iReboot);