如何从 Fragment 调用 Activity 类

Question

我正在使用 Navigation Drawer，当有人单击滑动菜单中的项目时，我想调用 testActivity.java 类。目前，当滑动菜单项时，我的 MainActivity.java 类正在调用 FragmentOne、FragmentTwo、FragmentThree selected..我想用 testActivity.java 替换它

这是我的 MainActivity.java

 public class MainActivity extends FragmentActivity {
final String[] data ={"one","two","three"};
final String[] fragments ={
        "core.layout.FragmentOne",
        "core.layout.FragmentTwo",
        "core.layout.FragmentThree"};
@Override
protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.activity_main);

     ArrayAdapter<String> adapter = new ArrayAdapter<String>    (getActionBar().getThemedContext(), android.R.layout.simple_list_item_1, data);

     final DrawerLayout drawer = (DrawerLayout)findViewById(R.id.drawer_layout);
     final ListView navList = (ListView) findViewById(R.id.drawer);
     navList.setAdapter(adapter);
     navList.setOnItemClickListener(new OnItemClickListener(){
             @Override
             public void onItemClick(AdapterView<?> parent, View view, final int pos,long id){
                     drawer.setDrawerListener( new DrawerLayout.SimpleDrawerListener(){
                             @Override
                             public void onDrawerClosed(View drawerView){
                                     super.onDrawerClosed(drawerView);
                                     FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
                                     tx.replace(R.id.main, Fragment.instantiate(MainActivity.this, fragments[pos]));
                                     tx.commit();
                             }
                     });
                     drawer.closeDrawer(navList);
             }
     });
     FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
     tx.replace(R.id.main,Fragment.instantiate(MainActivity.this, fragments[0]));
     tx.commit();
}

}

这是我的 FragmentOne.java 类..所有其他 FragmentTwo 和 FragmentThree.java 类具有相同的代码。

      public class FragmentOne extends Fragment {


public static Fragment newInstance(Context context) {
    FragmentOne f = new FragmentOne();

    return f;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
   ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_one, null);

    View view = inflater.inflate(R.layout.fragment_one,container, false);

   return root;


}

}

这是我的 testActivity.java 类

   public class testActivity extends Activity {

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


}

}

Answer 1

在 Fragment 中，您可以使用 getActivity() 访问其父 FragmentActivity 实例。而且由于该实例是一个活动，因此使用它您可以简单地调用另一个活动。

Intent myIntent = new Intent((ParentActivity)getActivity(), YourOtherActivity.class);
(ParentActivity)getActivity().startActivity(myIntent);