android.app.Fragment#onDestroy ( )源码实例Demo

private void testLifecycle(LifecycleProvider<FragmentEvent> provider) {
    Fragment fragment = (Fragment) provider;
    FragmentTestUtil.startFragment(fragment);

    TestObserver<FragmentEvent> testObserver = provider.lifecycle().skip(1).test();

    fragment.onAttach(null);
    fragment.onCreate(null);
    fragment.onViewCreated(null, null);
    fragment.onStart();
    fragment.onResume();
    fragment.onPause();
    fragment.onStop();
    fragment.onDestroyView();
    fragment.onDestroy();
    fragment.onDetach();

    testObserver.assertValues(
        FragmentEvent.ATTACH,
        FragmentEvent.CREATE,
        FragmentEvent.CREATE_VIEW,
        FragmentEvent.START,
        FragmentEvent.RESUME,
        FragmentEvent.PAUSE,
        FragmentEvent.STOP,
        FragmentEvent.DESTROY_VIEW,
        FragmentEvent.DESTROY,
        FragmentEvent.DETACH
    );
}
 

private void testBindToLifecycle(LifecycleProvider<FragmentEvent> provider) {
    Fragment fragment = (Fragment) provider;
    startFragment(fragment);

    fragment.onAttach(null);
    TestObserver<Object> attachObserver = observable.compose(provider.bindToLifecycle()).test();

    fragment.onCreate(null);
    attachObserver.assertNotComplete();
    TestObserver<Object> createObserver = observable.compose(provider.bindToLifecycle()).test();

    fragment.onViewCreated(null, null);
    attachObserver.assertNotComplete();
    createObserver.assertNotComplete();
    TestObserver<Object> createViewObserver = observable.compose(provider.bindToLifecycle()).test();

    fragment.onStart();
    attachObserver.assertNotComplete();
    createObserver.assertNotComplete();
    createViewObserver.assertNotComplete();
    TestObserver<Object> startObserver = observable.compose(provider.bindToLifecycle()).test();

    fragment.onResume();
    attachObserver.assertNotComplete();
    createObserver.assertNotComplete();
    createViewObserver.assertNotComplete();
    startObserver.assertNotComplete();
    TestObserver<Object> resumeObserver = observable.compose(provider.bindToLifecycle()).test();

    fragment.onPause();
    attachObserver.assertNotComplete();
    createObserver.assertNotComplete();
    createViewObserver.assertNotComplete();
    startObserver.assertNotComplete();
    resumeObserver.assertComplete();
    TestObserver<Object> pauseObserver = observable.compose(provider.bindToLifecycle()).test();

    fragment.onStop();
    attachObserver.assertNotComplete();
    createObserver.assertNotComplete();
    createViewObserver.assertNotComplete();
    startObserver.assertComplete();
    pauseObserver.assertComplete();
    TestObserver<Object> stopObserver = observable.compose(provider.bindToLifecycle()).test();

    fragment.onDestroyView();
    attachObserver.assertNotComplete();
    createObserver.assertNotComplete();
    createViewObserver.assertComplete();
    stopObserver.assertComplete();
    TestObserver<Object> destroyViewObserver = observable.compose(provider.bindToLifecycle()).test();

    fragment.onDestroy();
    attachObserver.assertNotComplete();
    createObserver.assertComplete();
    destroyViewObserver.assertComplete();
    TestObserver<Object> destroyObserver = observable.compose(provider.bindToLifecycle()).test();

    fragment.onDetach();
    attachObserver.assertComplete();
    destroyObserver.assertComplete();
}