How we can rate my app - coding android studio

package com.edupointbd.amirul.ntcbebook;

import android.app.Dialog;import android.content.Context;import android.content.Intent;import android.content.SharedPreferences;import android.graphics.Color;import android.net.Uri;import android.view.View;import android.widget.Button;import android.widget.LinearLayout;import android.widget.TextView;
/** * Created by Amirul on 17-Oct-17. */
public class AppRater {
    private final static String APP_TITLE = "app title";// App Name    private final static String APP_PNAME = "com.edupointbd.";// Package Name
    private final static int DAYS_UNTIL_PROMPT = 3;//Min number of days    private final static int LAUNCHES_UNTIL_PROMPT = 3;//Min number of launches
    public static void app_launched(Context mContext) {
        SharedPreferences prefs = mContext.getSharedPreferences("apprater", 0);
        if (prefs.getBoolean("dontshowagain", false)) { return ; }

        SharedPreferences.Editor editor = prefs.edit();

        // Increment launch counter        long launch_count = prefs.getLong("launch_count", 0) + 1;
        editor.putLong("launch_count", launch_count);

        // Get date of first launch        Long date_firstLaunch = prefs.getLong("date_firstlaunch", 0);
        if (date_firstLaunch == 0) {
            date_firstLaunch = System.currentTimeMillis();
            editor.putLong("date_firstlaunch", date_firstLaunch);
        }

        // Wait at least n days before opening        if (launch_count >= LAUNCHES_UNTIL_PROMPT) {
            if (System.currentTimeMillis() >= date_firstLaunch +
                    (DAYS_UNTIL_PROMPT * 24 * 60 * 60 * 1000)) {
                showRateDialog(mContext, editor);
            }
        }

        editor.commit();
    }

    public static void showRateDialog(final Context mContext, final SharedPreferences.Editor editor) {
        final Dialog dialog = new Dialog(mContext);
        dialog.setTitle("Rate " + APP_TITLE);

        LinearLayout ll = new LinearLayout(mContext);
        ll.setOrientation(LinearLayout.VERTICAL);
        ll.setBackgroundColor(Color.CYAN);

        TextView tv = new TextView(mContext);
        tv.setText( APP_TITLE + ", আপটি ভাল লাগলে ৫ স্টার দিন। ব্যবহার করার জন্য  ধন্যবাদ ");
        tv.setTextColor(Color.parseColor("#FFC100"));
        tv.setTextSize(16F);
        tv.setWidth(240);
        tv.setPadding(4, 0, 4, 10);

        ll.addView(tv);
        ll.setBackgroundResource(R.color.blue_grey);

        Button b1 = new Button(mContext);
        b1.setText("Rate " + APP_TITLE);
        b1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                mContext.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + APP_PNAME)));
                dialog.dismiss();
            }
        });
        ll.addView(b1);

        Button b2 = new Button(mContext);
        b2.setText("Remind me later");

        b2.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
        ll.addView(b2);

        Button b3 = new Button(mContext);
        b3.setText("No, thanks");
        b3.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                if (editor != null) {
                    editor.putBoolean("dontshowagain", true);
                    editor.commit();
                }
                dialog.dismiss();
            }
        });
        ll.addView(b3);

        dialog.setContentView(ll);
        dialog.show();
    }
}

Enter code use it one time. 

AppRater.app_launched(this);

Source: StackOverFlow