A class to ask user to rate appp if they have not done so.

rateBeggar.java

package com.package.name;

import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.util.Log;

public class rateBeggar {

    private String displayMessage = "Thank you for using our app. We rely on your feedback to continue making improvements.\n\nRate us on the Play Store?";
    private int usageThreshold = 5;
    private int delayHours = 48;

    private int usageCount;
    private Context context;
    private SharedPreferences prefs;
    private boolean neverAgain;
    private long lastAskedTime;

    public rateBeggar(Context context){
        this.context = context;
        prefs = context.getSharedPreferences("rateBeggar", 0);
        usageCount = prefs.getInt("usageCount", 1);
        lastAskedTime = prefs.getLong("lastAskedTime", 0);
        neverAgain = prefs.getBoolean("neverAgain", false);
        SharedPreferences.Editor editor = prefs.edit();
        editor.putInt("usageCount", usageCount+1);
        editor.commit();
    }

    /**
     * Should user be prompted to rate
     * @return
     */
    public boolean shouldPromptForRating(){
        long currentTime = System.currentTimeMillis() / 1000L;
        long askAgainTime = currentTime - (delayHours * 60 * 60);
        boolean tooSoon = lastAskedTime != 0 && lastAskedTime < askAgainTime;
        return usageCount > usageThreshold && !neverAgain && !tooSoon;
    }

    /**
     * Set the message that is displayed to user
     * @param displayMessage
     */
    public rateBeggar setDisplayMessage(String displayMessage){
        this.displayMessage = displayMessage;
        return this;
    }

    /**
     * How many uses before prompting
     * @param usageThreshold
     */
    public rateBeggar setUsageThreshold(int usageThreshold){
        this.usageThreshold = usageThreshold;
        return this;
    }

    /**
     * How many hours to wait before prompting again when user chooses "Later"
     * @param delayHours
     */
    public rateBeggar setDelayHours(int delayHours){
        this.delayHours = delayHours;
        return this;
    }

    /**
     * Beg user for rating, if appropriate
     */
    public void beg(){
        Log.e("rateBeggar", "begging...");
        if(shouldPromptForRating()) {
            AlertDialog alertDialog = new AlertDialog.Builder(context).create();
            alertDialog.setCancelable(false);
            alertDialog.setCanceledOnTouchOutside(false);
            alertDialog.setTitle("Please rate our app!");
            alertDialog.setMessage(this.displayMessage);
            alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "Okay",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {
                            goToStore();
                            setNeverAgain();
                            dialog.dismiss();
                        }
                    });
            alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, "Already Did",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {
                            setNeverAgain();
                            dialog.dismiss();
                        }
                    });
            alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, "Later",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.dismiss();
                        }
                    });
            alertDialog.show();
            setLastAskedTime();
        }
    }

    private void setLastAskedTime() {
        long lastAskedTime = System.currentTimeMillis() / 1000L;
        this.lastAskedTime = lastAskedTime;
        SharedPreferences.Editor editor = prefs.edit();
        editor.putLong("lastAskedTime", lastAskedTime);
        editor.commit();
    }

    private void setNeverAgain(){
        SharedPreferences.Editor editor = prefs.edit();
        editor.putBoolean("neverAgain", true);
        editor.commit();
    }

    private void goToStore(){
        Uri uri = Uri.parse("market://details?id=" + context.getPackageName());
        Intent goToMarket = new Intent(Intent.ACTION_VIEW, uri);
        goToMarket.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_NEW_DOCUMENT | Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
        try {
            context.startActivity(goToMarket);
        } catch (ActivityNotFoundException e) {
            context.startActivity(new Intent(Intent.ACTION_VIEW,  Uri.parse("http://play.google.com/store/apps/details?id=" + context.getPackageName())));
        }
    }
}