saveswappy.java

String pname = getPackageName();
String[] CMDLINE_GRANTPERMS = { "su", "-c", null };
if (getPackageManager().checkPermission(android.Manifest.permission.READ_LOGS, pname) != 0) {
    if (android.os.Build.VERSION.SDK_INT >= 16) {
        try {
            CMDLINE_GRANTPERMS[2] = String.format("pm grant %s android.permission.READ_LOGS", pname);
            java.lang.Process p = Runtime.getRuntime().exec(CMDLINE_GRANTPERMS);
            int res = p.waitFor();
            Log.d(TAG, res);
            if (res != 0)
                throw new Exception("root didn't work");
        } catch (Exception e) {
            Log.d(TAG, "exception from exec:" e);
        }
    }
}