Custom Progressbar and ProgressDialog

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public class CustomProgressDialogOne  {

    public void showCustomDialog(Context context) {
        AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(context);
        final View dialogView = LayoutInflater.from(context).inflate(R.layout.custom_progress_dialog_one, null);
        dialogBuilder.setView(dialogView);
        dialogBuilder.setCancelable(true);
        RelativeLayout mainLayout = (RelativeLayout) dialogView.findViewById(R.id.mainLayout);
        mainLayout.setBackgroundResource(R.drawable.my_progress_one);
        AnimationDrawable frameAnimation = (AnimationDrawable)mainLayout.getBackground();
        frameAnimation.start();
        AlertDialog b = dialogBuilder.create();
        b.show();
    }


}

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private Button btnProgressBar;
    private Button btnProgressDialogOne,btnProgressDialogTwo;
    private ProgressBar viewProgressBar;
    private CustomProgressDialogTwo customProgressDialogTwo;
    private CustomProgressDialogOne customProgressDialogOne;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initializeViews();
        clickListener();
    }

    private void initializeViews() {
        btnProgressBar = (Button) findViewById(R.id.btnProgressBar);
        btnProgressDialogOne = (Button) findViewById(R.id.btnProgressDialogOne);
        btnProgressDialogTwo = (Button) findViewById(R.id.btnProgressDialogTwo);
        viewProgressBar = (ProgressBar) findViewById(R.id.viewProgressBar);
        customProgressDialogTwo = new CustomProgressDialogTwo(this,R.drawable.loadingicon);
        customProgressDialogOne = new CustomProgressDialogOne();
    }

    private void clickListener() {
        btnProgressBar.setOnClickListener(this);
        btnProgressDialogOne.setOnClickListener(this);
        btnProgressDialogTwo.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btnProgressBar:
                viewProgressBar.setVisibility(View.VISIBLE);
                break;
            case R.id.btnProgressDialogOne:
                viewProgressBar.setVisibility(View.GONE);
                customProgressDialogOne.showCustomDialog(this);
                break;
            case R.id.btnProgressDialogTwo:
                viewProgressBar.setVisibility(View.GONE);
                customProgressDialogTwo.show();
                break;
        }
    }
}