How do I store data in my android app?

This question already has an answer here:

Saving Android Activity state using Save Instance State 25 answers

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For a simple piece of data such as high score you could easily save this in SharedPreferences. This is a simple key value pairing that persists across app launches and doesn't require a SQL database.

To obtain a shared preference:

SharedPreferences prefs = this.getSharedPreferences( "com.example.app", Context.MODE_PRIVATE);

To edit and save to shared preference:

int highScore = 100; prefs.edit().putInt("HighScore", highScore).apply();

To retrieve shared preference :

int score = prefs.getInt("HighScore", 0);

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