private static final String PACKAGE_NAME_LAUNCHER = "com.android.launcher3";
private int mSecretNumber = 0;
private static final long MIN_CLICK_INTERVAL = 600;
private long mLastClickTime;


// click logo button 10 times continuously to open com.android.launcher3
findViewById(R.id.logo).setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        long currentClickTime = SystemClock.uptimeMillis();
        long elapsedTime = currentClickTime - mLastClickTime;
        mLastClickTime = currentClickTime;

        if (elapsedTime < MIN_CLICK_INTERVAL) {
            ++mSecretNumber;
            if (9 == mSecretNumber) {
                try {
                    Intent intent = getPackageManager().getLaunchIntentForPackage(PACKAGE_NAME_LAUNCHER);
                    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
                    startActivity(intent);
                } catch (Exception e) {
                    Log.i(TAG, e.toString());
                }

                finish();
            }
        } else {
            mSecretNumber = 0;
        }

    }
});