import android.support.v4.content.SharedPreferencesCompat; import android.support.v4.util.ArrayMap; public void saveData(String key, String value) { SharedPreferences sharedPreferences = getSharedPreferences("data", Context.MODE_PRIVATE); SharedPreferences.Editor editor = sharedPreferences.edit(); editor.putString(key, value); editor.apply(); } public String getData(String key) { SharedPreferences sharedPreferences = getSharedPreferences("data", Context.MODE_PRIVATE); return sharedPreferences.getString(key, ""); } saveData("name", "Tom"); String name = getData("name"); Log.d("MainActivity", "Name: " + name); gradle dependencies { implementation 'com.android.support:support-core-utils:28.0.0' }