Android expandlistview取消点击效果

Android ExpandListView取消点击效果

在Android开发中，我们经常会遇到需要自定义控件的需求，比如取消ExpandListView的点击效果。ExpandListView是一个可以展开和折叠的列表视图，通常用于展示分组数据。但是，默认情况下，ExpandListView的每个子项都可以被点击，这可能会影响用户体验。本文将介绍如何取消ExpandListView的点击效果，并提供代码示例。

旅行图

首先，我们通过一个旅行图来了解取消ExpandListView点击效果的整个流程：

journey
    title 取消ExpandListView点击效果
    section 步骤1: 创建ExpandListView
      step1: 创建ExpandListView控件
    section 步骤2: 设置Adapter
      step2: 设置自定义Adapter
    section 步骤3: 重写点击事件
      step3: 重写ExpandableListView的onChildClickListener方法
    section 步骤4: 取消点击效果
      step4: 返回false以取消点击效果

流程图

接下来，我们用流程图来详细描述取消ExpandListView点击效果的步骤：

flowchart TD
    A[创建ExpandListView] --> B[设置Adapter]
    B --> C[重写点击事件]
    C --> D[取消点击效果]

代码示例

以下是取消ExpandListView点击效果的代码示例：

public class MainActivity extends AppCompatActivity {
    private ExpandableListView expandableListView;
    private ExpandableListAdapter expandableListAdapter;
    private List<String> groupList = new ArrayList<>();
    private HashMap<String, List<String>> childList = new HashMap<>();

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

        expandableListView = findViewById(R.id.expandableListView);
        initData();
        expandableListAdapter = new ExpandableListAdapter(this, groupList, childList);
        expandableListView.setAdapter(expandableListAdapter);

        expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
            @Override
            public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
                // 返回false以取消点击效果
                return false;
            }
        });
    }

    private void initData() {
        groupList.add("Group 1");
        groupList.add("Group 2");

        List<String> child1 = new ArrayList<>();
        child1.add("Child 1-1");
        child1.add("Child 1-2");
        childList.put(groupList.get(0), child1);

        List<String> child2 = new ArrayList<>();
        child2.add("Child 2-1");
        child2.add("Child 2-2");
        childList.put(groupList.get(1), child2);
    }

    private class ExpandableListAdapter extends BaseExpandableListAdapter {
        private Context context;
        private List<String> groupList;
        private HashMap<String, List<String>> childList;

        public ExpandableListAdapter(Context context, List<String> groupList, HashMap<String, List<String>> childList) {
            this.context = context;
            this.groupList = groupList;
            this.childList = childList;
        }

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

        @Override
        public int getChildrenCount(int groupPosition) {
            return childList.get(groupList.get(groupPosition)).size();
        }

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

        @Override
        public Object getChild(int groupPosition, int childPosition) {
            return childList.get(groupList.get(groupPosition)).get(childPosition);
        }

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

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

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

        @Override
        public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
            TextView textView = new TextView(context);
            textView.setText(groupList.get(groupPosition));
            textView.setGravity(Gravity.CENTER);
            textView.setPadding(20, 10, 20, 10);
            return textView;
        }

        @Override
        public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
            TextView textView = new TextView(context);
            textView.setText(getChild(groupPosition, childPosition).toString());
            textView.setGravity(Gravity.CENTER);
            textView.setPadding(20, 10, 20, 10);
            return textView;
        }

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