Android:如何跟踪将数据传输到另一个 fragment 时单击的多个按钮

Question

大家好，我是 android 编程的新手，我有这个 xml 文件及其关联的 java fragment 类

 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

<Button
    android:id="@+id/sisButton"
    android:layout_width="wrap_content"
    android:layout_height="35dp"
    android:layout_alignParentTop="true"
    android:layout_alignRight="@+id/smallButton"
    android:layout_alignParentLeft="true"
    android:layout_marginLeft="16dp"
    android:layout_marginTop="18dp"
    android:text="@string/sis" />

<Button
    android:id="@+id/soeButton"
    android:layout_width="wrap_content"
    android:layout_height="35dp"
    android:layout_alignBaseline="@+id/sisButton"
    android:layout_centerHorizontal="true"
    android:text="@string/soe" />
<Button
    android:id="@+id/solButton"
    android:layout_width="wrap_content"
    android:layout_height="35dp"
    android:layout_alignBaseline="@+id/sisButton"
    android:layout_alignParentRight="true"
    android:text="@string/sol" />

<Button
    android:id="@+id/sobButton"
    android:layout_width="wrap_content"
    android:layout_height="35dp"
    android:layout_alignLeft="@+id/textViewNumLockersAvailable"
    android:layout_below="@+id/sisButton"
    android:layout_marginTop="18dp"
    android:layout_alignParentLeft="true"
    android:layout_marginLeft="16dp"
    android:text="@string/sob" />

<Button
    android:id="@+id/allSchoolsButton"
    android:layout_width="wrap_content"
    android:layout_height="35dp"
    android:layout_marginLeft="150dp"
    android:layout_toRightOf="@+id/sobButton"
    android:layout_alignBaseline="@+id/sobButton"
    android:text="@string/all" />

<Button
    android:id="@+id/smallButton"
    android:layout_width="wrap_content"
    android:layout_height="35dp"
    android:layout_below="@+id/sobButton"
    android:layout_marginTop="28dp"

    android:text="@string/small" />



<Button

         android:text="@string/large" />

<Button

       android:text="@string/all" />

  <Button

    android:text="@string/lv1" />

<Button

    android:text="@string/lv2" />

 <Button

         android:text="@string/lv3" />

<Button

    android:text="@string/all" />

  <Button

     android:text="@string/ViewNumLockersAvailable" />

<Button

       android:text="@string/search" />
<Button

    android:text="@string/logout" />



   </RelativeLayout>

问题，当我将数据传输到另一个 fragment 时，如何跟踪被点击的按钮

请帮忙

Answer 1

how do I keep the track of the buttons that were click, when I transfer the data to another fragment

据了解，您正在寻找 fragment 间数据传输。让您的父 Activity 通过界面处理此传输(或您想要的任何其他操作):

public interface InterFragmentDataTransferer {
     public void btnListener(String dataStr1, String dataStr2);
     // You may define here as many other methods as you need.
}

然后，在您的父 Activity 中实现此接口(interface)，使用所需的操作覆盖方法并最终实例化您的 fragment :

public MyFragmentHolderActivity extends Activity implements InterFragmentDataTransferer {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.your_parent_activity_layout);
        // Do other instantiation jobs;
        // .
        // .
        mFragment = MyFragment.newInstance();

    }

    public void btnListener(String dataStr1, String dataStr2) {
        // You've the desired data here :D ... so do whatever you'd like.
    }
}

最后，您将在 fragment 的onAttach 方法中获取调用者 fragment 中的接口(interface)实例，可用于传递数据:

public class MyFragment extends Fragment implements OnClickListener {

     private InterFragmentDataTransferer mFragDataTransferer;

     public static Fragment newInstance() {
        return new MyFragment();
     }

     @Override
     public void onAttach(Activity activity) {
        super.onAttach(activity);
        mFragDataTransferer = (InterFragmentDataTransferer) activity;
     }

     public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
          Log.d(TAG, "inside OncreateView()");
          ViewGroup rv = (ViewGroup) inflater.inflate(
                              R.layout.your_layout, container, false);

          (rv.findViewById(R.id.sisButton))
                             .setOnClickListener(this);
          (rv.findViewById(R.id.soeButton))
                             .setOnClickListener(this);
          (rv.findViewById(R.id.solButton))
                             .setOnClickListener(this);
          (rv.findViewById(R.id.sobButton))
                             .setOnClickListener(this);
          (rv.findViewById(R.id.allSchoolsButton))
                             .setOnClickListener(this);
          (rv.findViewById(R.id.smallButton))
                             .setOnClickListener(this);

          // TODO write your other code
    }


    @Override
    public void onClick(View v) {

          switch (v.getId()) {
             case R.id.sisButton:
                 // TODO write button click-action here
                 mFragDataTransferer.btnListener(dataStr1, dataStr2);
                 break;
             case R.id.soeButton:
                 // TODO write button click-action here
                 mFragDataTransferer.btnListener(dataStr1, dataStr2);
                 break;
             case R.id.solButton:
                 // TODO write button click-action here
                 mFragDataTransferer.btnListener(dataStr1, dataStr2);
                 break;
             case R.id.sobButton:
                 // TODO write button click-action here
                 mFragDataTransferer.btnListener(dataStr1, dataStr2);
                 break;
             case R.id.allSchoolsButton:
                 // TODO write button click-action here
                 mFragDataTransferer.btnListener(dataStr1, dataStr2);
                 break;
             case R.id.smallButton:
                 // TODO write button click-action here
                 mFragDataTransferer.btnListener(dataStr1, dataStr2);
                 break;
             default:
                break;
          }
    }
}

额外提示:不要重写 fragment 构造函数来传递任何数据/接口(interface)，这可能会抛出 FragmentInstantiateException，虽然通过 newInstance() 方法作为参数传递接口(interface)更安全，但也不推荐正如我所读到的。