Question

我的主要活动中有一个导航抽屉。现在我需要调用onNavigationDrawerItemSelected方法中的所有片段。但奇怪的是，我没有碎片。我还有活动。所以我用Fragment Activity扩展了它。

MainActivity是导航抽屉活动。

FeedListActivity是Fragment活动。

现在我需要在我的主要活动中添加Feedlistactivity作为片段。我怎样才能做到这一点？

我看到很多与此相关的问题。但我无法与我联系。

主要活动

public class MainActivity extends ActionBarActivity implements NavigationDrawerCallbacks{

        private Toolbar mToolbar;
        private NavigationDrawerFragment mNavigationDrawerFragment;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            mToolbar = (Toolbar) findViewById(R.id.toolbar_actionbar);
            setSupportActionBar(mToolbar);
            getSupportActionBar().setDisplayShowHomeEnabled(true);
            mNavigationDrawerFragment = (NavigationDrawerFragment) getFragmentManager().findFragmentById(R.id.fragment_drawer);
            mNavigationDrawerFragment.setup(R.id.fragment_drawer, (DrawerLayout) findViewById(R.id.drawer), mToolbar);
        }

        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            getMenuInflater().inflate(R.menu.menu_main, menu);
            return super.onCreateOptionsMenu(menu);
        }

        @Override
        public void onNavigationDrawerItemSelected(int position) {
            if (position == 1){
                Fragment newFragment = new Fragment();
                FragmentTransaction transaction = getFragmentManager().beginTransaction();
                transaction.replace(R.id.container, newFragment);
                transaction.commit();    
            }
        }
    }

FeedListActivity

public class FeedListActivity extends FragmentActivity{

    private Toolbar mToolbar;
    private NavigationDrawerFragment mNavigationDrawerFragment;
    private static final String TAG = "FeedListActivity";

    private ListView NewsView;
    private FeedListAdapter listAdapter;
    private List<FeedItem> feedItems;
    ProgressBarCircularIndetermininate progressBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_feed_list);
        mToolbar = (Toolbar) findViewById(R.id.toolbar_actionbar);
        progressBar = (ProgressBarCircularIndetermininate) findViewById(R.id.progressBar);
        progressBar.setVisibility(View.VISIBLE);
        mNavigationDrawerFragment = (NavigationDrawerFragment) getFragmentManager().findFragmentById(R.id.fragment_drawer);
        mNavigationDrawerFragment.setup(R.id.fragment_drawer, (DrawerLayout) findViewById(R.id.drawer), mToolbar);
        feedItems = new ArrayList<FeedItem>();
        listAdapter = new FeedListAdapter(this, feedItems);
        NewsView = (ListView) findViewById(R.id.feed_list);
        NewsView.setAdapter(listAdapter);

        // making fresh volley request and getting json

        // Adding request to volley request queue
        AppController.getInstance().addRequest(gsonRequest, TAG);
        getimg();
    }
}

Answer 1

FeedListActivity是Fragment活动。现在我需要在我的Main中添加Feedlistactivity作为片段活动。我怎样才能做到这一点？

fragmentActivity不是片段。它是一个支持片段的活动，它被引入以使较旧的Android构建向后兼容片段 - 如果您只是针对较新的API，则只能忽略它。要使FeedListActivity（）成为片段......您必须从片段扩展。

Fragment newFragment = new Fragment();

此处的这一行应该是在您将其作为片段后创建FeedList的新实例。

如何将片段活动称为片段？

1 个答案: