Fix robolectric test error

import org.junit.runner.RunWith;

import org.mockito.Mock;

import org.mockito.MockitoAnnotations;

import org.robolectric.Robolectric;

import org.robolectric.RobolectricTestRunner;

import org.robolectric.RuntimeEnvironment;

        MockitoAnnotations.initMocks(this);

        mContext = RuntimeEnvironment.application;

        mActivity = spy(new SettingsActivity());

        mActivity = spy(Robolectric.buildActivity(SettingsActivity.class).create().get());

    }

    @Test

        when(mActivity.getSupportFragmentManager()).thenReturn(mFragmentManager);

        doReturn(mContext.getContentResolver()).when(mActivity).getContentResolver();

        when(mFragmentManager.beginTransaction()).thenReturn(mock(FragmentTransaction.class));

        doReturn(RuntimeEnvironment.application.getClassLoader()).when(mActivity).getClassLoader();

        mActivity.launchSettingFragment(null, mock(Intent.class));