Mở link CHPLAY

public static void openGooglePlay(Activity ac, Dialog alertDialog){
    final String appPackageName = ac.getPackageName(); // getPackageName() from Context or Activity object    try {
        ac.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
        
    } catch (android.content.ActivityNotFoundException anfe) {
        ac.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + appPackageName)));
    }
    alertDialog.dismiss();

}


public static int getVersionCode(Context ct){
    PackageInfo packageInfo = getPackageInfo(ct);
    if (packageInfo!=null){

        return packageInfo.versionCode;
    }
    return 0;
}

public static PackageInfo getPackageInfo(Context ct){

    PackageInfo pInfo = null;
    try {
        pInfo = ct.getPackageManager().getPackageInfo(ct.getPackageName(), 0);
        return pInfo;
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
    return null;

}