can not slide one fragment to another

[Realwishall]

I am very new to android development only made small project which i need to work for my physics classes

i am facing isshu that is.
i am stuck on first fragment and can not go to any other page and on this page only cancel button is working...
this is my code

package com.example.demoreel;

import androidx.appcompat.app.AppCompatActivity;

import android.Manifest;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.Toast;

import com.hololo.tutorial.library.PermissionStep;
import com.hololo.tutorial.library.Step;
import com.hololo.tutorial.library.TutorialActivity;

public class MyTuorialSlider extends TutorialActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
   // setContentView(R.layout.activity_my_tuorial_slider);
    addFragment(
            new PermissionStep
                    .Builder()
                    .setPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE})
                    .setTitle(getString(R.string.permission_title)).setContent(getString(R.string.permission_detail))
                    .setBackgroundColor(Color.parseColor("#FF0957"))
                    .setDrawable(R.drawable.ss_1)
                    .setSummary(getString(R.string.continue_and_learn))
                    .build());
    addFragment(
            new Step.Builder()
                    .setTitle(getString(R.string.automatic_data))
                    .setContent(getString(R.string.gm_finds_photos))
                    .setBackgroundColor(Color.parseColor("#FF0957"))
                    .setDrawable(R.drawable.ss_1)
                    .setSummary(getString(R.string.continue_and_learn))
                    .build());
    addFragment(
            new Step.Builder()
                    .setTitle(getString(R.string.choose_the_song))
                    .setContent(getString(R.string.swap_to_the_tab))
                    .setBackgroundColor(Color.parseColor("#00D4BA"))
                    .setDrawable(R.drawable.ss_2)
                    .setSummary(getString(R.string.continue_and_update))
                    .build());
    addFragment(
            new Step.Builder()
                    .setTitle(getString(R.string.edit_data))
                    .setContent(getString(R.string.update_easily))
                    .setBackgroundColor(Color.parseColor("#1098FE"))
                    .setDrawable(R.drawable.ss_2)
                    .setSummary(getString(R.string.continue_and_result))
                    .build());
    addFragment(
            new Step.Builder()
                    .setTitle(getString(R.string.result_awesome))
                    .setContent(getString(R.string.after_updating))
                    .setBackgroundColor(Color.parseColor("#CA70F3"))
                    .setDrawable(R.drawable.ss_1)
                    .setSummary(getString(R.string.thank_you))
                    .build());
    setPrevText("LAST"); // Previous button text
    setNextText("NEXT"); // Next button text
    setFinishText("ENTER"); // Finish button text
   // setCancelText("Heelo cance"); // Cancel button text
    //setIndicatorSelected(int drawable); // Indicator drawable when selected
    //setIndicator(int drawable); // Indicator drawable
    setGivePermissionText("DONE"); // Permission button text
    Toast.makeText(getApplicationContext(),"Play",Toast.LENGTH_LONG).show();
}

@Override
public void finishTutorial() {
    Toast.makeText(this, "Tutorial finished", Toast.LENGTH_SHORT).show();
    finish();
}

@Override
public void currentFragmentPosition(int position) {
    Toast.makeText(this, "Position : " + position, Toast.LENGTH_SHORT).show();
}

}

[syash5]

Remove the first addfragment from your code, the one with PermissionStep.Builder.