android - 如何使用 Intent 在滑动视图中显示薮活动？

Question

我试图让薮猫活动进入一个滑动视图。

我试过这个教程：在 Android 中使用 ViewPager 和 FragmentPagerAdapter 实现水平视图 滑动

如何使用 Intent 让活动显示在一个部分中，而不是显示该 textView（如教程中所示）？（或任何其他方式）。谢谢！

Answer 1

在第 8 步和第 9 步中，您需要做的是在 MyFragmentPagerAdapter 的 getItem() 方法中返回您不同的 MyFragment 1.2.3 等（从您的活动转换而来）：

/** This method will be invoked when a page is requested to create */
@Override
public Fragment getItem(int arg0) {

    //MyFragment myFragment = new MyFragment();
    //Bundle data = new Bundle();
    //data.putInt("current_page", arg0+1);
    //myFragment.setArguments(data);
    //return myFragment;

//a switch returning different types Fragments
switch(position) {
    case 0:
        //Previous Activity 1, "converted to a Fragment":)
        return (mMyFragment1 = new MyFragment1());
    case 1:
        //Previous Activity 2, "converted to a Fragment":)
        return (mMyFragment2 = new MyFragment2());
    }
}

注意：有一种更快的方法来实现该教程中的代码：确保您从 Android SDK 管理器中安装了最新的 SDK 工具和平台工具。在您尝试的教程的第 4 步中，“输入 MainActivity 详细信息”选择导航类型：滑动视图 + 标题条，一切顺利。

带有注释的示例片段

public class MyFragment extends Fragment {
//Empty Constructor
public MyFragment () {
}   
//Return a new instance with FragmentArguments
public static MyFragment newInstance(Bundle args) {
MyFragment fragment = new MyFragment();
fragment.setArguments(args);
return fragment;
}

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
//Fragments Inflate the content view here, 
//Activities use: setContentView(R.layout.activity_main);
return inflater.inflate(R.layout.main_activity, container, false);
}

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);

 //Fragments initialize views here (or you could do it in the onCreateView() method), 
 //Activities do it in the OnCreate() method
TextView textview = (TextView) view.findViewById(R.id.textView);
textview.setText(
         "Implement all your old Activity methods here, " +
         "but remember to use getActivity() instead of THIS. !!!" +
         "A Fragment is a child of the parent Activity" +
         "--One Activity to rule them all--"     
         );


////let the argument decide what you want to do. here it is the position in the FragmentPagerAdapter
//   final int position;
//   if (getArguments() != null) {
//          position = getArguments().getInt(MyConfig.ADAPTER_POSITION_KEY);
//   } 
    }//END onViewCreated()

//      //Let the Activity implement a callback interface to communicate back. 
//      public interface Callbacks {
//          public void onCallback(int adId);
//      }
//      private static Callbacks sDummyCallbacks = new Callbacks() {
//          @Override
//          public void onCallback(int adId) {
//          }
//      };
//      private Callbacks mCallbacks = sDummyCallbacks;
//      @Override
//      public void onAttach(Activity activity) {
//          super.onAttach(activity);
//          if (!(activity instanceof Callbacks)) {
//              throw new ClassCastException(
//                      "Activity must implement fragment's callbacks.");
//          }
//          mCallbacks = (Callbacks) activity;
//      }
    //
//      @Override
//      public void onDetach() {
//          super.onDetach();
//          mCallbacks = sDummyCallbacks;
//      }    

}