当我单击父列表项

时间：2015-08-10 11:35:26

标签： expandablelistview

我正在尝试实现可扩展的列表视图，但是当我单击父列表项时，我想显示另一个xml作为子列表项，它有两个具有一些功能的按钮。它应该显示child.xml的内容是扩展列表视图。是否有可能做到这一点？我已经浏览了与可扩展列表视图相关的各种帖子，但我还没有得到解决方案。 我实施的守则如下：

MainActivity.class：

public class MainActivity extends Activity {

private ExpandableListView mEventList;
private String[] eventMenuTitles = {Item1, Item2, Item3, Item4, Item5};
Integer[] imgid={R.drawable.logo,R.drawable.logo,R.drawable.logo,R.drawable.logo,R.drawable.logo};
private String[][] children;

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

    // load slide menu items
    eventMenuTitles = getResources().getStringArray(R.array.event_drawer_items);
   // eventMenuIcons = getResources().getInteger(R.array.event_drawer_icons);
    children = new String [][] {
            { "Content1" },
            { "Content2" },
            { "Content3" },
            { "Content4" },
            {"Content5"}
        };

    mEventList=(ExpandableListView)findViewById(R.id.expandableListView1);
    mEventList.setAdapter(new ExpandableListAdapter(eventMenuTitles, children));
    mEventList.setGroupIndicator(null);

}

public class ExpandableListAdapter extends BaseExpandableListAdapter {

    private final LayoutInflater inf;
    private String[] groups;
    private String[][] children;

    public ExpandableListAdapter(String[] groups, String[][] children) {
        this.groups = groups;
        this.children = children;
        inf = LayoutInflater.from(getApplicationContext());
    }

    @Override
    public int getGroupCount() {
        return groups.length;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return children[groupPosition].length;
    }

    @Override
    public Object getGroup(int groupPosition) {
        return groups[groupPosition];
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return children[groupPosition][childPosition];
    }

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

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

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

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

         ViewHolder holder;
            if (convertView == null) {
                convertView = inf.inflate(R.layout.activity_contents, parent, false);
                holder = new ViewHolder();
                holder.text = (TextView) convertView.findViewById(R.id.textView1);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }

            holder.text.setText(getChild(groupPosition, childPosition).toString());

            return convertView;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        ViewHolder holder;

        if (convertView == null) {
            convertView = inf.inflate(R.layout.activity_list, parent, false);

            holder = new ViewHolder();
            holder.text = (TextView) convertView.findViewById(R.id.title);

            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.text.setText(getGroup(groupPosition).toString());

        return convertView;
    }

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

    private class ViewHolder {
        TextView text;
    }

}
}

activity_contents.xml 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:text="Large Text"
    android:textStyle="bold"
    android:textAppearance="?android:attr/textAppearanceLarge" />

<TextView
    android:id="@+id/textView3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/textView2"
    android:layout_below="@+id/textView2" />

<ImageButton
    android:id="@+id/imageButton1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/textView3"
    android:layout_marginTop="25dp"
    android:layout_toLeftOf="@+id/textView3"
    android:src="@drawable/logo" />

<TextView
    android:id="@+id/textView4"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignTop="@+id/imageButton1"
    android:layout_toLeftOf="@+id/textView1"/>

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBaseline="@+id/textView4"
    android:layout_alignBottom="@+id/textView4"
    android:layout_alignParentRight="true"
    android:onClick="add"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:textColor="#FFFFFF" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/textView1"
    android:layout_toLeftOf="@+id/button1"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:textStyle="bold" />

</RelativeLayout>

Activity_list.xml 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:gravity="center"
android:weightSum="1" >

<ImageView
    android:id="@+id/icon"
    android:layout_width="40dp"
    android:layout_height="40dp"
    android:layout_weight="0.2"
    android:layout_gravity="center"
    android:src="@drawable/logo" />

<TextView
    android:id="@+id/title"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:minHeight="?android:attr/listPreferredItemHeightSmall"
    android:textAppearance="?android:attr/textAppearanceListItemSmall"
    android:layout_weight="0.8"
    android:gravity="center|left" />

</LinearLayout>

如图所示，activity_contents.xml有一个imageButton和一个按钮，每个onClick我想要执行一些功能。但是，我能得到的最大值是点击父项时显示的xml。如何在activity_contents.xml中单击按钮添加一些功能。

1 个答案:

答案 0 :(得分：0)

我终于找到了上述问题的解决方案。它如下：

MainActivity.class：

public class MainActivity extends Activity {

private ExpandableListView mEventList;
private String[] eventMenuTitles = {Item1, Item2, Item3, Item4, Item5};
Integer[] imgid={R.drawable.logo,R.drawable.logo,R.drawable.logo,R.drawable.logo,R.drawable.logo};
private String[][] children;

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

// load slide menu items
eventMenuTitles = getResources().getStringArray(R.array.event_drawer_items);
// eventMenuIcons = getResources().getInteger(R.array.event_drawer_icons);
children = new String [][] {
        { "Content1" },
        { "Content2" },
        { "Content3" },
        { "Content4" },
        {"Content5"}
    };

mEventList=(ExpandableListView)findViewById(R.id.expandableListView1);
mEventList.setAdapter(new ExpandableListAdapter(eventMenuTitles, children));
mEventList.setGroupIndicator(null);

}

public class ExpandableListAdapter extends BaseExpandableListAdapter {

private final LayoutInflater inf;
private String[] groups;
private String[][] children;

public ExpandableListAdapter(String[] groups, String[][] children) {
    this.groups = groups;
    this.children = children;
    inf = LayoutInflater.from(getApplicationContext());
}

@Override
public int getGroupCount() {
    return groups.length;
}

@Override
public int getChildrenCount(int groupPosition) {
    return children[groupPosition].length;
}

@Override
public Object getGroup(int groupPosition) {
    return groups[groupPosition];
}

@Override
public Object getChild(int groupPosition, int childPosition) {
    return children[groupPosition][childPosition];
}

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

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

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

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

     ViewHolder holder;
        if (convertView == null) {
            convertView = inf.inflate(R.layout.activity_contents, parent, false);
            holder = new ViewHolder();
            holder.text = (TextView) convertView.findViewById(R.id.textView1);
           holder.btn = (Button)convertView.findViewById(R.id.button1);
holder.button.setOnClickListener(new OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        // TODO Auto-generated method stub  
                        //Your Code
             }
         });
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.text.setText(getChild(groupPosition, childPosition).toString());

        return convertView;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    ViewHolder holder;

    if (convertView == null) {
        convertView = inf.inflate(R.layout.activity_list, parent, false);

        holder = new ViewHolder();
        holder.text = (TextView) convertView.findViewById(R.id.title);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.text.setText(getGroup(groupPosition).toString());

    return convertView;
}

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

private class ViewHolder {
    TextView text;
    Button btn;
}

}
}

其余的都是一样的。 ：）

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