rate_me_code2

//Try Google play
intent.setData(Uri.parse("market://details?id=com.cubeactive.qnotelistfree"));
if (!MyStartActivity(intent)) {
    //Market (Google play) app seems not installed, let's try to open a webbrowser
    intent.setData(Uri.parse("https://play.google.com/store/apps/details?id=com.melopixels.mastiunlimited"));
    if (!MyStartActivity(intent)) {
        //Well if this also fails, we have run out of options, inform the user.
        Toast.makeText(this, "Could not open Android market, please install the market app.", Toast.LENGTH_SHORT).show();
    }
}