Tray - マルチプロセスをサポートしたSharedPreferences

final AppPreferences appPreferences = new AppPreferences(getContext());

// 書き込み
appPreferences.put("key", "Tray");

// 読み込み
final String value = appPreferences.getString("key", "default");
Log.v(TAG, "value: " + value); // value: Tray

// 読み込み(デフォルト)
final String defaultValue = appPreferences.getString("key2", "default");
Log.v(TAG, "value: " + defaultValue); // value: default

repositories {
    jcenter()
}

dependencies {
    compile 'net.grandcentrix.tray:tray:0.9.2'
}

android {
    ...
    defaultConfig {
        applicationId "your.app.id" // アプリのパッケージ名

        resValue "string", "tray__authority", "${applicationId}.tray"
    }
}

    <!-- Values from default config. -->
    <item name="tray__authority" type="string">your.app.id.tray</item>

public class PrefUtils {
    @SuppressWarnings("unused")
    private static final String TAG = PrefUtils.class.getSimpleName();

    private static final String PREF_NAME = "test";
    private static final String KEY_COUNT = "count";

    public static void put(Context context, int count) {
        SharedPreferences pref = context.getSharedPreferences(PREF_NAME, Context.MODE_MULTI_PROCESS);
        pref.edit().putInt(KEY_COUNT, count).commit();
    }

    public static int get(Context context) {
        SharedPreferences pref = context.getSharedPreferences(PREF_NAME, Context.MODE_MULTI_PROCESS);
        return pref.getInt(KEY_COUNT, 0);
    }
}

public class TrayUtils {
    @SuppressWarnings("unused")
    private static final String TAG = TrayUtils.class.getSimpleName();

    private static final String KEY_COUNT = "count";

    public static void put(Context context, int count) {
        TrayAppPreferences pref = new TrayAppPreferences(context);
        pref.put(KEY_COUNT, count);
    }

    public static int get(Context context) {
        TrayAppPreferences pref = new TrayAppPreferences(context);
        return pref.getInt(KEY_COUNT, 0);
    }
}

public class TrayAppPreferences extends TrayModulePreferences {
    private static final int VERSION = 1;

    public TrayAppPreferences(Context context) {
        super(context, context.getPackageName(), 1);
    }

    protected void onCreate(int newVersion) {
    }

    protected void onUpgrade(int oldVersion, int newVersion) {
        throw new IllegalStateException("Can\'t upgrade database from version " + oldVersion + " to " + newVersion + ", not implemented.");
    }
}

public class MainActivity extends AppCompatActivity {

    private Button mButton;
    private int mCount;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mCount = 0;

        mButton = (Button) findViewById(R.id.button);
        mButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mCount++;

                PrefUtils.put(MainActivity.this, mCount);
                TrayUtils.put(MainActivity.this, mCount);

                TestService.start(MainActivity.this);
            }
        });
    }
}

public class TestService extends IntentService {
    @SuppressWarnings("unused")
    private static final String TAG = TestService.class.getSimpleName();

    public TestService() {
        super(TAG);
    }

    public TestService(String name) {
        super(name);
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        int prefCount = PrefUtils.get(this);
        int trayCount = TrayUtils.get(this);

        Log.d(TAG, "pref:" + prefCount + "\ttray:" + trayCount);
    }

    public static void start(Context context) {
        Intent intent = new Intent(context, TestService.class);
        context.startService(intent);
    }
}