RateMyApp.java

package com.chupamobile.android.ratemyapp;

import android.app.AlertDialog;
import android.app.Service;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.preference.PreferenceManager;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;

public class RateMyApp {
	
	//application title
	private String appTitle;
	
	//days till the dialog is shown
	private int daysToPrompt;
	
	//launches till the dialog is shown
	private int launchesToPrompt;
	
	//message to display
	private String message;
	
	//text color
	private int textColor;
	
	//text size
	private int textSize;
	
	private AlertDialog dialog;
	
	private SharedPreferences prefs;
	

	private Context ctx;
	
	/**
	 * Constructor. It initializes all the needed variables.
	 * 
	 * @param ctx the context
	 * @param appTitle the application title. Will be shown in dialog title
	 * @param daysToPrompt no of days that must pass in order to prompt the user.
	 * @param launchesToPrompt no of app launches that must pass in order to prompt the user. 
	 */
	public RateMyApp(Context ctx, String appTitle, int daysToPrompt, int launchesToPrompt){
		
		this.ctx = ctx;
		this.appTitle = appTitle;
		this.daysToPrompt = daysToPrompt;
		this.launchesToPrompt = launchesToPrompt;
		this.prefs = PreferenceManager.getDefaultSharedPreferences(ctx);
		
	}
	
	public void start(){
		
		//if the "not show again" check box was checked => return and don't show anything
		if(prefs.getBoolean("not_show_again", false)){
			
			return;
		}
		
		//first launch date
		long firstLaunch = prefs.getLong("first_launch", -1);
		if(firstLaunch == -1){
			
			firstLaunch = System.currentTimeMillis();
			prefs.edit().putLong("first_launch", firstLaunch).commit();
		}
		
		//launch counter
		int launchCounter = prefs.getInt("launch_counter", 0) +1;
		prefs.edit().putInt("launch_counter", launchCounter).commit();
		
		//verify to show dialog
		if(launchCounter >= launchesToPrompt){
			
			if(System.currentTimeMillis() >= firstLaunch + (daysToPrompt * 24 * 60 * 60 * 1000)){
				
				//show the dialog
				showDialog();
				
			}
		}
		
	}
	
	private void showDialog(){
		
		AlertDialog.Builder alertBuilder = new AlertDialog.Builder(ctx);
		
		//inflate the dialog layout
		LayoutInflater inflater = (LayoutInflater) ctx.getSystemService(Service.LAYOUT_INFLATER_SERVICE);
		View layout = inflater.inflate(R.layout.dialog,null);
		
		//get the visual elements from the inflated layouts
		TextView messageTv = (TextView)layout.findViewById(R.id.message);
		final CheckBox notShowAgainCheck = (CheckBox)layout.findViewById(R.id.do_not_show_check);
		
		//if a text color has been set => assign it
		if(textColor!=0){
			messageTv.setTextColor(textColor);
			notShowAgainCheck.setTextColor(textColor);
		}
		
		//if a text size has been set => assign it
		if(textSize != 0){
			
			messageTv.setTextSize(TypedValue.COMPLEX_UNIT_SP, textSize);
			notShowAgainCheck.setTextSize(TypedValue.COMPLEX_UNIT_SP, textSize);
		}
		
		
		//if a custom message has been set => assign it
		if(message!=null){
			
			messageTv.setText(message);
			
		}
		
		alertBuilder.setView(layout);
		alertBuilder.setTitle("Rate " + appTitle);
		
		//on clicking the "Yes" button => go to app's Google Play page
		//and don't show again the dialog (assuming the user has rated the app)
		alertBuilder.setPositiveButton(ctx.getString(R.string.rate_now), new OnClickListener() {
			
			@Override
			public void onClick(DialogInterface dialog, int which) {				
				
				Uri uri = Uri.parse("market://details?id=" + ctx.getPackageName());
			    Intent myAppLinkToMarket = new Intent(Intent.ACTION_VIEW, uri);
			    try {
			    	
			        prefs.edit().putBoolean("not_show_again", true).commit();
			    	ctx.startActivity(myAppLinkToMarket);
			        
			    } catch (ActivityNotFoundException e) {
			    	
			    	//the device hasn't installed Google Play
			        Toast.makeText(ctx, "You don't have Google Play installed", Toast.LENGTH_LONG).show();
			    }
				
			}
		});
		
		//on the "Not now" button postpone the showing of the dialog
		//that is restarting the counting and the days
		alertBuilder.setNegativeButton(ctx.getString(R.string.reminder_later), new OnClickListener() {
			
			@Override
			public void onClick(DialogInterface dialog, int which) {
				
				if(notShowAgainCheck.isChecked()){
					
					prefs.edit().putBoolean("not_show_again", true).commit();
					
				}

				
				prefs.edit().putInt("launch_counter", 0).commit();
				prefs.edit().putLong("first_launch", System.currentTimeMillis()).commit();
				dialog.dismiss();
				
			}
		});
		
		dialog = alertBuilder.create();
		dialog.show();

	}
	
	public String getMessage() {
		return message;
	}

	/**
	 * Set a message to display inside the dialog.
	 * @param message
	 */
	public void setMessage(String message) {
		this.message = message;
	}

	public int getTextColor() {
		return textColor;
	}

	/**
	 * Set the color for the text inside the dialog. Default color is black.
	 * @param textColor
	 */
	public void setTextColor(int textColor) {
		this.textColor = textColor;
	}

	public int getTextSize() {
		return textSize;
	}

	/**
	 * Set the text size of the text inside the dialog. The unit used is SP.
	 * @param textSize text size in SP
	 */
	public void setTextSize(int textSize) {
		this.textSize = textSize;
	}

	public AlertDialog getDialog() {
		return dialog;
	}

	public void setDialog(AlertDialog dialog) {
		this.dialog = dialog;
	}

}