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Adding Achievements to Your Android Game

This guide shows you how to use the achievements APIs in an Android application to unlock and display achievements in your game. The APIs can be found in the com.google.android.gms.games.achievement package.

Before you begin

If you haven't already done so, you might find it helpful to review the achievements game concepts.

Before you start to code using the achievements API:

Once the player is signed in and the GoogleApiClient is connected, your game can start using the achievements APIs.

Unlocking achievements

To unlock an achievement, call the unlock() method and and pass in the achievement ID.

Games.Achievements.unlock(mGoogleApiClient, "my_achievement_id");

If the achievement is of the incremental type (that is, several steps are required to unlock it), call increment() instead.

Games.Achievements.increment(mGoogleApiClient, "my_incremental_achievment_id", 1);

You do not need to write additional code to unlock the achievement; Google Play games services automatically unlocks the achievement once it reaches its required number of steps.

A good practice is to define the achievement IDs in the strings.xml file, so your game can reference the achievements by resource ID. When making calls to update and load achievements, make sure to also follow these best practices to avoid exceeding your API quota.

Displaying achievements

To show a player's achievements, call getAchievementsIntent() to get an Intent to create the default achievements UI. Your game can then bring up the UI by calling startActivityForResult. In the following snippet, REQUEST_ACHIEVEMENTS is an arbitrary integer used as the request code.

startActivityForResult(Games.Achievements.getAchievementsIntent(mGoogleApiClient),
        REQUEST_ACHIEVEMENTS);

An example of the default achievements UI is shown below.

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