如何在Android中的Expandablelistview中處理子點擊事件？

Question

我正在Android中創建可擴展列表視圖。 我在相對布局中添加了三個textview，在水平線性布局中添加了兩個按鈕意味着這兩個按鈕被添加到一行中，那么如何在這兩個按鈕上觸發click事件？

我想在可擴展列表視圖中按下按鈕調用另一個活動。 但我沒有想到如何在ExpandableListView單擊子項。

這是我的XML文件。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@android:color/white"
    android:padding="2dp" >

    <TextView
        android:id="@+id/TextView_Projectdetails"
        android:layout_width="match_parent"
        android:layout_height="25dp"
        android:background="@drawable/button_shape"
        android:paddingLeft="10sp"
        android:textColor="@android:color/black" />

    <TextView
        android:id="@+id/textOne"
        android:layout_width="match_parent"
        android:layout_height="25dp"
        android:layout_below="@+id/TextView_Projectdetails"
        android:layout_marginTop="2dp"
        android:background="@drawable/button_shape"
        android:paddingLeft="10sp"
        android:textColor="@android:color/black" >
    </TextView>

    <TextView
        android:id="@+id/textTwo"
        android:layout_width="match_parent"
        android:layout_height="25dp"
        android:layout_below="@+id/textOne"
        android:layout_marginTop="2dp"
        android:background="@drawable/button_shape"
        android:paddingLeft="10sp"
        android:textColor="@android:color/black" >
    </TextView>

    <LinearLayout
        android:id="@+id/linearlAYOUT"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textTwo"
        android:layout_marginTop="5dp"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/button_EditedTask"
            android:layout_width="0dp"
            android:layout_height="27dp"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:background="@drawable/button_shape_two"
            android:gravity="center"
            android:paddingBottom="3sp"
            android:paddingTop="3sp"
            android:text="ASSIGN TASK"
            android:focusable="false"      
            android:textColor="@android:color/white"
            android:textSize="12sp"
            android:textStyle="normal" />

        <Button
            android:id="@+id/buttonViewTask"
            android:layout_width="0dp"
            android:layout_height="27dp"
            android:layout_gravity="center_vertical|center_horizontal"
            android:layout_marginLeft="3dp"
            android:layout_weight="1"
            android:background="@drawable/button_shape_one"
            android:gravity="center"
            android:paddingBottom="3sp"
            android:paddingTop="3sp"
            android:text="VIEW TASK"
            android:focusable="false"      
            android:textColor="@android:color/white"
            android:textSize="12sp"
            android:textStyle="normal" />
    </LinearLayout>

</RelativeLayout>

List_Group xml文件 -

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="8dp" 
    android:background="#000000">


    <TextView
        android:id="@+id/lblListHeader"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"
        android:textSize="17dp"
        android:textColor="#f9f93d" />

</LinearLayout>

這是我的ExpandableListAdapter類 -

public class ExpandableListAdapter extends BaseExpandableListAdapter {

    private Context _context;
    private List<String> _listDataHeader; // header titles
    // child data in format of header title, child title
    private HashMap<String, List<String>> _listDataChild;
    Context context;

    public ExpandableListAdapter(Context context, List<String> listDataHeader,
            HashMap<String, List<String>> listChildData) {
        this._context = context;
        this._listDataHeader = listDataHeader;
        this._listDataChild = listChildData;
    }

    public ExpandableListAdapter
    (My_Project my_Project, List createGroupList,
            int listGroup, String[] strings, int[] is, List createChildList,
            int childItem, String[] strings2, int[] is2)
    {
        // TODO Auto-generated constructor stub
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) 
    {
        //this.get(groupPosition).getChildren().get(childPosition);
        String strchildPosition = this._listDataChild.get(this._listDataHeader.get(groupPosition)).get(childPosition);
        System.out.println("Child Position  =" + strchildPosition);
        return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                .get(childPosition);
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }

    @Override
    public View getChildView(int groupPosition, final int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {

        final String childText = (String) getChild(groupPosition, childPosition);

        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.child_item, null);
        }

        TextView txtListChild = (TextView) convertView.findViewById(R.id.TextView_Projectdetails);
        TextView txtOneListChild = (TextView)convertView.findViewById(R.id.textOne);
        TextView txtTwoListChild = (TextView)convertView.findViewById(R.id.textTwo);



        txtListChild.setText(childText);
        txtOneListChild.setText(childText);
        txtTwoListChild.setText(childText);




        Button btnAssgnTask = (Button)convertView.findViewById(R.id.button_EditedTask);
        btnAssgnTask.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                //Intent i=new Intent(context,Assign_Task.class);
                //StartElementListener()

            }
        });


        Button btnViewTask = (Button)convertView.findViewById(R.id.buttonViewTask);

        return convertView;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                .size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return this._listDataHeader.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        return this._listDataHeader.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        return groupPosition;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        String headerTitle = (String) getGroup(groupPosition);
        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.list_group, null);
        }

        TextView lblListHeader = (TextView) convertView
                .findViewById(R.id.lblListHeader);
        lblListHeader.setTypeface(null, Typeface.BOLD);
        lblListHeader.setText(headerTitle);

        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }

}

這是我的活動代碼 -

public class My_Project extends ExpandableListActivity 
{


    expListView = (ExpandableListView) findViewById(android.R.id.list);

        expListView.setOnGroupClickListener(new OnGroupClickListener()
        {
            @Override
                public boolean onGroupClick(ExpandableListView parent, View v,
                        int groupPosition, long id) 
                {
                    return false;
                }
            });


            expListView.setOnGroupExpandListener(new OnGroupExpandListener() {

                @Override
                public void onGroupExpand(int groupPosition) {
                    Toast.makeText(getApplicationContext(),
                            dtrProjectNAmeSize.length + " Expanded",
                            Toast.LENGTH_SHORT).show();
                }
            });


            expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() {

                @Override
                public void onGroupCollapse(int groupPosition) {
                    Toast.makeText(getApplicationContext(),
                            dtrProjectNAmeSize.length + " Collapsed",
                            Toast.LENGTH_SHORT).show();
                }
            });


            expListView.setOnChildClickListener(new OnChildClickListener() {

                @Override
                public boolean onChildClick(ExpandableListView parent, View v,
                        int groupPosition, int childPosition, long id) {
                    // TODO Auto-generated method stub

                     int cp = (int) mAdapter.getChildId(groupPosition, childPosition);
                     if(cp == 3)
                     {
                         switch (cp)
                         {
                                case 3:



                                break;

                         }
                     }


                    return false;

                }
            });



            mAdapter = new SimpleExpandableListAdapter(
                        this,
                        groupData,
                        R.layout.list_group,
                        new String[] { Project_Name },
                        new int[] {R.id.lblListHeader },
                        childData,
                        R.layout.child_item,
                        new String[] { Project_Date_Created , Project_End_Date , Project_Is_Active},
                        new int[] { R.id.TextView_Projectdetails , R.id.textOne , R.id.textTwo }
                        );

                expListView.setAdapter(mAdapter);  

    }



    }

Answer 1

您可以設置可擴展列表視圖的chid的setOnChildClickListener，然后可以根據用於創建可擴展列表視圖的數組列表的值轉到其他活動。

            menuExpandableListView
                    .setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

                        @Override
                        public boolean onChildClick(
                                ExpandableListView parent, View v,
                                int groupPosition, int childPosition,
                                long id) {
                            GoCategory(mainMenusList.get(groupPosition)
                                    .getPagesList().get(childPosition));
                            return false;
                        }
                    });

或者你可以做到這一點

@Override
public View getChildView(final int groupPosition, final int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent) {
    Page page =(Page) getChild(groupPosition, childPosition);
    convertView = inflater.inflate(R.layout.child_list_layout, null);
    Button button1=(Button)convertView.findViewById(R.id.button1);
     button1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

                Your code here....


        }
    });

    return convertView;
}

Answer 2

你在這做什么 -

expListView.setOnChildClickListener(new OnChildClickListener() {

                @Override
                public boolean onChildClick(ExpandableListView parent, View v,
                        int groupPosition, int childPosition, long id) {
                    // TODO Auto-generated method stub

                     int cp = (int) mAdapter.getChildId(groupPosition, childPosition);
                     if(cp == 3)
                     {
                         switch (cp)
                         {
                                case 3:



                                break;

                         }
                     }


                    return false;

                }
            });

此偵聽器用於子項單擊，在此部分代碼中調用startActivity(intent) 。