java - RoboFragment 不适用于 FragmentTransaction.add(int,Fragment) 方法

Question

我有

public class ItemDetailFragment extends RoboFragment

我尝试从另一个 Activity 创建它:

public class ItemDetailActivity extends RoboFragmentActivity {

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

        // Show the Up button in the action bar.
        getActionBar().setDisplayHomeAsUpEnabled(true);

        // savedInstanceState is non-null when there is fragment state
        // saved from previous configurations of this activity
        // (e.g. when rotating the screen from portrait to landscape).
        // In this case, the fragment will automatically be re-added
        // to its container so we don't need to manually add it.
        // For more information, see the Fragments API guide at:
        //
        // http://developer.android.com/guide/components/fragments.html
        //
        if (savedInstanceState == null) {
            // Create the detail fragment and add it to the activity
            // using a fragment transaction.
//            Bundle arguments = new Bundle();
//            arguments.putString(ItemDetailFragment.ARG_ITEM_ID,
//                    getIntent().getStringExtra(ItemDetailFragment.ARG_ITEM_ID));
            ItemDetailFragment fragment = new ItemDetailFragment();
            //fragment.setArguments(arguments);
            getFragmentManager().beginTransaction()
                    .add(R.id.item_detail_container, fragment)
                    .commit();

            fragment.init(getApplicationContext());
        }
    }

但我收到此错误:

Error:(45, 21) Gradle: error: no suitable method found for add(int,ItemDetailFragment)
method FragmentTransaction.add(int,Fragment,String) is not applicable
(actual and formal argument lists differ in length)
method FragmentTransaction.add(int,Fragment) is not applicable
(actual argument ItemDetailFragment cannot be converted to Fragment by method invocation conversion)
method FragmentTransaction.add(Fragment,String) is not applicable
(actual argument int cannot be converted to Fragment by method invocation conversion)

Answer 1

据我所知，RoboFragmentActivity 从支持库扩展了android.support.v4.app.FragmentActivity。

我认为您应该调用 getSupportFragmentManager() 而不是 getFragmentManager()。