本文实例讲述了Android开发实现ListView点击展开收起效果。分享给大家供大家参考，具体如下：
废话不说先上效果：
实际上这是采用一个ExpandableListView实现的
布局文件很简单：
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<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity" > <!--提示框--> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="请选择您的类型：" android:textSize="30sp" android:textColor="#ffffffff" android:paddingLeft="5dp" android:paddingTop="5dp" android:paddingBottom="5dp" android:background="#ff000000"/> <!--定义一个ExpandableListView组件--> <ExpandableListView android:id="@+id/list" android:layout_width="match_parent" android:layout_height="match_parent"> </ExpandableListView></LinearLayout> |
然后就是具体实现：
这里主要是添加几个必须的属性 大多数方法不用重写
参考我代码中的位置稍加改动就行
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public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //创建一个ExpandableListAdapter对象 final ExpandableListAdapter adapter = new ExpandableListAdapter() { int[] logos = new int[]{ R.drawable.human1st, R.drawable.human1st, R.drawable.human2nd, R.drawable.human3rd }; private String[] humanTypes = new String[]{ "不是人","聪明人","普通人","我这样的人" }; private String[][] humans = new String[][]{ {"上仙","大神","荷兰猪"}, {"超人","一般聪明人","假的聪明人"}, {"努力的人","快乐的普通人","苦逼的普通人"}, {"天才","傻逼","蠢萌"} }; //获得制定组的位置、指定子列表项处的字列表项数据 private TextView getTextView(){ AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,164); TextView textView = new TextView(MainActivity.this); textView.setLayoutParams(layoutParams); textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT); textView.setPadding(36,0,0,0); textView.setTextSize(30); return textView; } @Override public void registerDataSetObserver(DataSetObserver observer) { } @Override public void unregisterDataSetObserver(DataSetObserver observer) { } @Override public int getGroupCount() { return humanTypes.length; } @Override public int getChildrenCount(int groupPosition) { return humans[groupPosition].length; } //获取制定组位置处的组数据 @Override public Object getGroup(int groupPosition) { return humanTypes[groupPosition]; } @Override public Object getChild(int groupPosition, int childPosition) { return humans[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; } //该方法决定每个组选项的外观 @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { LinearLayout linearLayout = new LinearLayout(MainActivity.this); linearLayout.setOrientation(LinearLayout.HORIZONTAL); ImageView logo = new ImageView(MainActivity.this); logo.setImageResource(logos[groupPosition]); linearLayout.addView(logo); TextView textView = getTextView(); textView.setText(getGroup(groupPosition).toString()); linearLayout.addView(textView);// linearLayout.setMinimumHeight(50); return linearLayout; } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { TextView textView = getTextView(); textView.setText(getChild(groupPosition,childPosition).toString()); return textView; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } @Override public boolean areAllItemsEnabled() { return false; } @Override public boolean isEmpty() { return false; } @Override public void onGroupExpanded(int groupPosition) { } @Override public void onGroupCollapsed(int groupPosition) { } @Override public long getCombinedChildId(long groupId, long childId) { return 0; } @Override public long getCombinedGroupId(long groupId) { return 0; } }; ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.list); expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { Toast.makeText(MainActivity.this,"你是一个：" + adapter.getChild(groupPosition,childPosition),Toast.LENGTH_SHORT).show(); return true; } }); expandableListView.setAdapter(adapter); }} |
希望本文所述对大家Android程序设计有所帮助。
原文链接：https://blog.csdn.net/qq_43377749/article/details/84328130
