MainActivity.java

// Java
public void rateApp(View rateMeButton) {
    String packageName = this.getPackageName();
    String playStoreAppUri = "market://details?id=" + packageName;
    String playStoreSiteUri = "https://play.google.com/store/apps/details?id=" + packageName;
    
    try {
        Intent playStoreAppIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(playStoreAppUri));
        startActivity(playStoreAppIntent);
    } catch (ActivityNotFoundException e) {
        Intent playStoreBrowserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(playStoreSiteUri));
        startActivity(playStoreBrowserIntent);
    }
}