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.launcher3findViewById(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;        }    }});

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