Android open URL onclick certain button

Button rate = (Button)findViewById(R.id.rate);
rate.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent i2=new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=yourpackagename"));
            startActivity(i2);
            }
        });

// Enter package name of application in place of yourpackagename

In my signin.xml file I put this code:

    <Button
        android:id="@+id/privacypolicylink"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:layout_marginBottom="50dp"
        android:background="@android:color/transparent"
        android:onClick="performSingUpMethod"
        android:text="Política de Privacidad"
        android:textColor="#A9A9A9"
        android:textSize="15dp"
        android:textStyle="bold" />

In my signin.java file I used this:

findViewById(R.id.privacypolicylink).setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            String url = "https://example.net/privacy_policy";

            Intent i = new Intent(Intent.ACTION_VIEW);
            i.setData(Uri.parse(url));
            startActivity(i);
        }
    });

It works for me. It displays a text in the grey color that I want it. The text is underlined and it is a link. The is the way it looks:

When I click on it, I see this:

Then I can open the link using a web browser on the phone and everything works correctly the way I needed it.

findViewById(R.id.ratebutton).setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    String url = "market://details?id=<package_name>";

                    Intent i = new Intent(Intent.ACTION_VIEW);
                    i.setData(Uri.parse(url));
                    startActivity(i);
                }
            });