在android测试上重启应用程序

我正在创建一个库,它将根据用户默认设置处理信息,并将其保存在SharedPreferences上,开发人员可以在初始化我的库之前对其进行修改.

SDK应该只为每个应用程序实例初始化一次,否则会触发RuntimeError.所以在Application类的应用程序端应该是这样的:

public class SampleApplication extends Application {
    @Override
    public void onCreate() {
       super.onCreate();

       //Here I can do something that will change the default configs

       //Here I initialize the SDK singleton method
       Sdk.initialize();
    }
}

sdk抽象实现:

public class Sdk {

    private static SampleApplication sInstance;

    private void Sdk(){
    }

    public static SampleApplication getInstance() throws RuntimeException {
        if (sInstance == null) {
            throw new RuntimeException();
        }
        return sInstance;
    }

    public static void initialize() {
        if (sInstance == null) {
            sInstance = new Sdk();
            //save some information according to what is on the default configurations
        } else {
            throw new RuntimeException("Method was already initialized");
        }
    }
}

当我想测试几个方案来调用这个方法时(每个应用程序实例只能调用一次),就会出现问题.

所以我创建了一个扩展ApplicationTest的Android测试

ApplicationTest:

  public class ApplicationTest extends ApplicationTestCase {
        public ApplicationTest() {
            super(SampleApplication.class);
        }
    }

Android测试示例:

public class SampleTest extends ApplicationTest {

    @Override
    protected void setUp() throws Exception {
// Here I restart the user preferences although I need to restart the application
//        terminateApplication();
//        createApplication();
        super.setUp();
    }

    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
    }

    public void testDefaultSettings() {
        // Here is where I want to restart application input
        // some values on the user preferences settings in order 
        // to test the output on sharedpreferences by the initialized method  
    }
}

我试图再次终止并创建应用程序,但没有成功.我的问题是有可能重新启动Android测试的应用程序吗？我在这里做错了吗？