ExpandableListView / ExpandableListActivity 应用及数据更新

ExpandableListView / ExpandableListActivity 使用及数据更新

ExpandableListView / ExpandableListActivity

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?二者关系 和 ListActivity / ListView 是一样的

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[代码 步骤]

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1. 定义含有ExpandableListView 的布局：main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:id="@+id/layout"    ><ExpandableListView  android:id="@+id/expandList"    android:layout_width="fill_parent"     android:layout_height="wrap_content"     /></LinearLayout>

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2.? 定义数据结构List<String>, List<List<String>> 分别用于存放 Group / Children 的String

List<String> group;    List<List<String>> child;

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3. 初始化 List<String> List<List<String>>? 并插入一些数据

public void initialData(){    group = new ArrayList<String>();        child = new ArrayList<List<String>>();        addInfo("griffinshi", new String[]{"13776117119","man","Jiangsu"});    addInfo("lancewu",new String[]{"1321134","man","Taiwan"});    addInfo("kandyli",new String[]{"12345"});    }        public void addInfo(String p,String[] c){    group.add(p);        List<String> item = new ArrayList<String>();        for(int i=0;i<c.length;i++){    item.add(c[i]);    }        child.add(item);    }

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3. 定义BaseExpandableListAdapter 并与List<String> List<List<String>> 数据相适配

public class InfoDetailsAdapter extends BaseExpandableListAdapter {    Activity activity;        public InfoDetailsAdapter(Activity a){    activity = a;    }        //child method stub    @Overridepublic Object getChild(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn child.get(groupPosition).get(childPosition);}@Overridepublic long getChildId(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn childPosition;}@Overridepublic int getChildrenCount(int groupPosition) {// TODO Auto-generated method stubreturn child.get(groupPosition).size();}@Overridepublic View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {// TODO Auto-generated method stubString string = child.get(groupPosition).get(childPosition);return getGenericView(string);}//group method stub@Overridepublic Object getGroup(int groupPosition) {// TODO Auto-generated method stubreturn group.get(groupPosition);}@Overridepublic int getGroupCount() {// TODO Auto-generated method stubreturn group.size();}@Overridepublic long getGroupId(int groupPosition) {// TODO Auto-generated method stubreturn groupPosition;}@Overridepublic View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {// TODO Auto-generated method stubString string = group.get(groupPosition);return getGenericView(string);}//View stub to create Group/Children 's Viewpublic TextView getGenericView(String s) {            // Layout parameters for the ExpandableListView            AbsListView.LayoutParams lp = new AbsListView.LayoutParams(                    ViewGroup.LayoutParams.FILL_PARENT, 64);            TextView text = new TextView(activity);            text.setLayoutParams(lp);            // Center the text vertically            text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);            // Set the text starting position            text.setPadding(36, 0, 0, 0);                        text.setText(s);            return text;        }@Overridepublic boolean hasStableIds() {// TODO Auto-generated method stubreturn false;}@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) {// TODO Auto-generated method stubreturn true;}            }

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4. emulator 运行截图：

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5. 下面说一下 数据更新 问题 包括：添加数据 删除数据

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* 定义添加数据界面：add.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    ><TextView      android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="姓名:"    /><EditText  android:id="@+id/add_name"    android:layout_width="200dip"     android:layout_height="wrap_content"     /></LinearLayout>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    ><TextView      android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="电话:"    /><EditText  android:id="@+id/add_phone"    android:layout_width="200dip"     android:layout_height="wrap_content"     /></LinearLayout>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    ><TextView      android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="性别:"    /><EditText  android:id="@+id/add_sex"    android:layout_width="200dip"     android:layout_height="wrap_content"     /></LinearLayout><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    ><TextView      android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="住址:"    /><EditText  android:id="@+id/add_home"    android:layout_width="200dip"     android:layout_height="wrap_content"     /></LinearLayout>   <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    ><Button  android:id="@+id/add_ok"    android:layout_width="90dip"     android:layout_height="wrap_content"     android:text="OK"    /><Button  android:id="@+id/add_no"    android:layout_width="90dip"     android:layout_height="wrap_content"     android:text="NO"    /></LinearLayout>     </LinearLayout>

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* add.xml 里 View 的定义：

public void createDialogAdd(){    viewAdd = this.getLayoutInflater().inflate(R.layout.add, null);                dialogAdd = new Dialog(this);        dialogAdd.setContentView(viewAdd);        dialogAdd.setTitle("输入新成员信息");                add_name = (EditText)viewAdd.findViewById(R.id.add_name);        add_phone = (EditText)viewAdd.findViewById(R.id.add_phone);        add_sex = (EditText)viewAdd.findViewById(R.id.add_sex);        add_home = (EditText)viewAdd.findViewById(R.id.add_home);                add_ok = (Button)viewAdd.findViewById(R.id.add_ok);        add_no = (Button)viewAdd.findViewById(R.id.add_no);                add_ok.setOnClickListener(new OnClickListener(){public void onClick(View v) {// TODO Auto-generated method stubString[] data = {add_phone.getText().toString(),add_sex.getText().toString(),add_home.getText().toString()};addInfo(add_name.getText().toString(),data);dialogAdd.dismiss();mAdapter.notifyDataSetChanged();}        });                add_no.setOnClickListener(new OnClickListener(){public void onClick(View v) {// TODO Auto-generated method stubdialogAdd.dismiss();}        });    }

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* 运行截图：

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* 定义删除数据界面：delete.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    ><TextView      android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="ID:"    /><EditText  android:id="@+id/delete_id"    android:layout_width="200dip"     android:layout_height="wrap_content"     /></LinearLayout>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    ><Button  android:id="@+id/delete_ok"    android:layout_width="90dip"     android:layout_height="wrap_content"     android:text="OK"    /><Button  android:id="@+id/delete_no"    android:layout_width="90dip"     android:layout_height="wrap_content"     android:text="NO"    /></LinearLayout>     </LinearLayout>

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* delete.xml 里View 定义：

public void createDialogDelete(){    viewDelete = this.getLayoutInflater().inflate(R.layout.delete, null);                dialogDelete = new Dialog(this);        dialogDelete.setContentView(viewDelete);        dialogDelete.setTitle("删除指定成员");                delete_id = (EditText)viewDelete.findViewById(R.id.delete_id);        delete_ok = (Button)viewDelete.findViewById(R.id.delete_ok);        delete_no = (Button)viewDelete.findViewById(R.id.delete_no);                delete_ok.setOnClickListener(new OnClickListener(){public void onClick(View v) {// TODO Auto-generated method stubString id = delete_id.getText().toString();if(! id.equals("")){int i = Integer.parseInt(id);group.remove(i);child.remove(i);dialogDelete.dismiss();mAdapter.notifyDataSetChanged();}}        });                delete_no.setOnClickListener(new OnClickListener(){public void onClick(View v) {// TODO Auto-generated method stubdialogDelete.dismiss();}        });    }

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* 运行截图：

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最后 说一下ExpandableListView的回调函数 用于监听那个id 被expand

expandList.setOnGroupClickListener(new OnGroupClickListener(){@Overridepublic boolean onGroupClick(ExpandableListView arg0, View arg1,int arg2, long arg3) {// TODO Auto-generated method stubToast.makeText(activity,"[Group Click]:"+arg2,Toast.LENGTH_LONG).show();return false;}                });                expandList.setOnChildClickListener(new OnChildClickListener(){@Overridepublic boolean onChildClick(ExpandableListView arg0, View arg1,int arg2, int arg3, long arg4) {// TODO Auto-generated method stubToast.makeText(activity,"[Child Click]:"+arg2+":"+arg3,Toast.LENGTH_LONG).show();return false;}                });

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