Android ExpandableListView 使用示例

布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <ExpandableListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />

</LinearLayout>

主程序代码：

package com.toby.personal.testlistview;

import android.app.Activity;
import android.database.DataSetObserver;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends Activity {

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

        ExpandableListAdapter adapter = new ExpandableListAdapter() {

            private final int[] types = new int[]{
                    R.drawable.img01, R.drawable.dog_001, R.drawable.girl01
            };

            private final String[] typeNames = new String[]{
                    "img", "dog", "girl"
            };

            private final String[][] items = new String[][]{
                    {"img01", "img02", "img03", "img04", "img05", "img06", "img07", "img08"},
                    {"dog01", "dog02", "dog03", "dog04", "dog05"},
                    {"girl01", "girl02", "girl03", "girl04", "girl05"}
            };

            private TextView getTextView() {
                AbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 200);
                TextView textView = new TextView(MainActivity.this);
                textView.setLayoutParams(lp);
                textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.START);
                textView.setPadding(36, 0, 0, 0);
                textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20);
                return textView;
            }

            @Override
            public void registerDataSetObserver(DataSetObserver dataSetObserver) {

            }

            @Override
            public void unregisterDataSetObserver(DataSetObserver dataSetObserver) {

            }

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

            @Override
            public int getChildrenCount(int groupPos) {
                return items[groupPos].length;
            }

            @Override
            public Object getGroup(int groupPos) {
                return typeNames[groupPos];
            }

            @Override
            public Object getChild(int groupPos, int childPos) {
                return items[groupPos][childPos];
            }

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

            @Override
            public long getChildId(int groupPos, int childPos) {
                return childPos;
            }

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

            @Override
            public View getGroupView(int groupPos, boolean isExpanded, View convertView,
                                     ViewGroup parent) {
                LinearLayout ll = new LinearLayout(MainActivity.this);
                ll.setOrientation(LinearLayout.HORIZONTAL);
                ImageView type = new ImageView(MainActivity.this);
                type.setScaleType(ImageView.ScaleType.FIT_XY);
                type.setLayoutParams(new LinearLayout.LayoutParams(300, 300));
                type.setImageResource(types[groupPos]);
                ll.addView(type);
                TextView textView = getTextView();
                textView.setText(getGroup(groupPos).toString());
                ll.addView(textView);
                return ll;
            }

            @Override
            public View getChildView(int groupPos, int childPos, boolean isLastChild,
                                     View convertView, ViewGroup parent) {
                TextView textView = getTextView();
                textView.setText(getChild(groupPos, childPos).toString());
                return textView;
            }

            @Override
            public boolean isChildSelectable(int groupPos, int childPos) {
                return true;
            }

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

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

            @Override
            public void onGroupExpanded(int i) {

            }

            @Override
            public void onGroupCollapsed(int i) {

            }

            @Override
            public long getCombinedChildId(long l, long l1) {
                return 0;
            }

            @Override
            public long getCombinedGroupId(long l) {
                return 0;
            }


        };

        ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.listView);
        expandableListView.setAdapter(adapter);
    }
}

运行效果图：

ExpandableListView 使用示例

参考文献：《疯狂Android讲义（第2版）》