How to onclick on pop up fragment ? Android studio - android-studio

Question

I have a popup.xml that have sign in and sign up button. This pop up will be shown when i click on certain function. Now the problem is i cant OnClick on the sign in and sign up button. I want to redirect to login activity when i click on sign in on the pop up fragment. I tried to create a class to the popup.xml and OnClick on sign in button but it seem like not working at all. It doesnt even triggered the OnClick function because Log.d("dwfsd","wefwef"); doesnt show at all.
Pop Up Image
My loginpopup.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="350dp"
android:layout_height="300dp"
xmlns:tools="http://schemas.android.com/tools"
android:layout_gravity="center"
android:background="#drawable/circlebackground"
tools:context=".loginpopup">
<ImageView
android:id="#+id/loginLogo"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="18dp"
android:src="#drawable/foxsplash" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/loginLogo"
android:paddingTop="30dp"
android:gravity="center">
<Button
android:id="#+id/signIn"
android:layout_width="150dp"
android:layout_height="55dp"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="56dp"
android:textColor="#color/white"
android:textSize="24sp"
android:padding="3dp"
android:focusable="true"
android:textAllCaps="false"
android:background="#drawable/rounded_rectangle"
android:text="Sign In"/>
<Button
android:id="#+id/signUp"
android:layout_width="150dp"
android:layout_height="50dp"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="56dp"
android:textColor="#color/white"
android:textSize="24sp"
android:padding="3dp"
android:focusable="true"
android:textAllCaps="false"
android:background="#drawable/rounded_rectangle"
android:text="Sign Up"
android:layout_toEndOf="#+id/signIn"/>
</RelativeLayout>
</RelativeLayout>
loginpopup.java:
public class loginpopup extends AppCompatActivity {
private Button button;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.loginpopup);
button =(Button) findViewById(R.id.signIn);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d("dwfsd","wefwef");
openActivity();
}
});
}
private void openActivity() {
Intent intent = new Intent(this, login.class);
startActivity(intent);
}
}