How to creat a game in your mobile phone

Welcome to Android recreation development with the Google Play games services!

The Play games SDK offers cross-platform Google Play games services that helps you to effortlessly integrate famous gaming functions consisting of achievements, leaderboards, stored games, and real-time multiplayer (on Android) to your pill and mobile video games.

This schooling will guide you to put in a pattern sport application for Android and quickly get began to create your very own Android recreation. the kind-a-quantity venture sample app demonstrates how you may combine achievements and leaderboards into your recreation.

before you start
installation your Android development environment. in case you are new to growing Android programs, see constructing Your First App.
Have an Android tool jogging Android four.0 (Ice Cream Sandwich) or higher on-hand for testing.
Step 1: download the sample app
For this developer guide, you'll need to download the sort-a-quantity project pattern Android software.

To down load and installation the pattern software in Android Studio:

download the Android samples from the samples download page.
Import the android-simple-samples undertaking. This task consists of TypeANumber and other Android recreation samples. To try this in Android Studio:
click record > Import challenge.
Browse to the directory wherein you downloaded android-fundamental-samples in your development device. pick out the document android-basic-samples/build.gradle and click on adequate.
within the TypeANumber module, open AndroidManifest.xml and alternate the bundle name from com.google.example.games.tanc to a exceptional package deal call of your very own. the new package call have to not start with com.google, com.example, or com.android.
Step 2: installation the game within the Google Play Console
The Google Play Google Play Console is where you manipulate Google Play video games offerings for your sport, and configure metadata for authorizing and authenticating your game.

To installation the sample recreation within the Google Play Console:

point your net browser to the Google Play Console, and register. If you haven't registered for the Google Play Console earlier than, you may be induced to do so.
comply with these instruction to add your recreation to the Google Play Console.
when asked in case you use Google APIs in your app, choose I don’t use any Google APIs in my game but.
For the reason of this developer guide, you could refill the form with your own sport information. For comfort, you could use the placeholder icons and screenshots furnished in the Downloads web page.
observe these instructions to generate an OAuth 2.zero customer id for your Android app.
while linking your Android app, make certain to specify the exact package name you used formerly while renaming pattern package deal.
you can use the Generate Signed APK Wizard in Android Studio to generate a brand new keystore and signed certificates in case you don’t have one already. To discover ways to run the Generate Signed APK Wizard, see Signing Your App in Android Studio.
make sure to file the following statistics for later:
Your application identification: that is a string consisting most effective of digits (generally 12 or extra), at the beginning of your client identity.
Your signing certificates: be aware which certificate you used when putting in your API access (the certificates whose SHA1 fingerprint you provided). You need to use the same certificate to signal your app while testing or releasing your app.
Configure achievements for type-a-quantity project:
select the Achievements tab in the Google Play Console.
add the following sample achievements:
name Description unique commands
high Get a rating it is a high variety. None
Humble Request a score of zero. None
do not get cocky, kid Request a rating of 9999 in both mode. None
OMG U R TEH UBER LEET! acquire a score of 1337. Make this a hidden success.
Bored Play the game 10 times. Make this an an incremental success with 10 steps to unlock.
truly absolutely Bored Play the game 100 times. Make this an an incremental achievement with one hundred steps to free up.
file the IDs (lengthy alphanumeric strings) for each achievement that you created.
Configure achievements which can be suitable for your recreation. To study extra, see the principles in the back of achievements and a way to put into effect achievements in Android.
Configure the leaderboards for type-a-quantity challenge:
select the Leaderboards tab within the Google Play Console.
upload  pattern leaderboards: one named “smooth excessive ratings” and another named “hard high ratings”. each leaderboards have to use Integer rating formatting with zero decimal places, and an ordering sort of large is higher.
record the IDs (long alphanumeric strings) for each leaderboard you created.
Configure leaderboards which can be appropriate to your game. To research greater, see the concepts at the back of leaderboards and a way to put into effect leaderboards in Android.
add check bills for your game. This step is wanted most effective for apps that have not yet been posted inside the Google Play Console. before the app is published, most effective the check debts indexed within the Google Play Console can log in. but, once an utility is published, everyone is permitted to log in.
Step three: modify your code
To run the sport, you need to configure the software identification as a aid to your Android task. you may additionally want to feature games metadata within the AndroidManifest.xml.

Open res/values/ids.xml and replace the placeholder IDs. if you are growing an Android recreation from scratch, you will want to create this file first.
Specify your application id inside the app_id aid.
Specify each achievement id which you created earlier inside the corresponding achievement_* useful resource.
Specify each leaderboard identification that you created in advance within the corresponding leaderboard_* resource.
Open AndroidManifest.xml and input your package call inside the package deal attribute of the  detail. if you are growing an Android game from scratch, ensure that you also add the subsequent code within the  element:
   
        android:value="@string/app_id" />
   
       android:value="@integer/google_play_services_version"/>
   
Step 4: test your recreation
To ensure that Google Play video games offerings are functioning successfully on your recreation, test the application before you submit it on Google Play.
To run your game in your physical check device:

verify which you have installation the test account which you are using to log in to the app (as defined in Step 2).
Export an APK and signal it with the equal certificates which you used to set up the venture in Google Play Console. To export a signed APK in Android Studio, click on construct > Generate Signed APK.
install the signed APK on your physical take a look at device by the usage of the adb device. To learn how to set up an application, see going for walks on a tool.