如何从Activity启动片段？

Question

我有一个片段:

ProductsFragments extends Fragment

和一个活动

AdminMenuActivity extends ActionBarActivity

我想从AdminMenuActivity调用ProductsFragments.我使用了2个选项:

1)

FragmentManager fm = getSupportFragmentManager();
                for(int i = 0; i < fm.getBackStackEntryCount(); ++i) {
                    fm.popBackStack();
                }
                FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
                tx.replace(R.id.frame_layout, android.support.v4.app.Fragment.instantiate(AdminMenuActivity.this, fragments[1]));
                tx.commit();

2)

Intent intent1 = new Intent(AdminMenuActivity.this, ProductsActivity.class);
                startActivity(intent1);

两者都失败了.我不想用FragmentActivity扩展ProductsFragments,因为它没有给我supportActionBar v7

那我怎么打电话Fragment？

Answer 1

以下是从Activity内部调用片段的方法

Fragment fr = new FirstFragment();
fr.setArguments(args);
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment_place, fr);
fragmentTransaction.commit();

假设你有fragment_place代表以下内容:

<fragment android:name="com.company.appName.fragments.FirstFragment"
        android:id="@+id/fragment_place"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />