ExpandableListView 和 ExpandableListActivity的使用及数据更新

ExpandableListView / ExpandableListActivity

[代码 步骤]

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>

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;

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);
    }

4. 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
    	
		@Override
		public Object getChild(int groupPosition, int childPosition) {
			// TODO Auto-generated method stub
			return child.get(groupPosition).get(childPosition);
		}

		@Override
		public long getChildId(int groupPosition, int childPosition) {
			// TODO Auto-generated method stub
			return childPosition;
		}

		@Override
		public int getChildrenCount(int groupPosition) {
			// TODO Auto-generated method stub
			return child.get(groupPosition).size();
		}
		
		@Override
		public View getChildView(int groupPosition, int childPosition,
				boolean isLastChild, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			String string = child.get(groupPosition).get(childPosition);
			return getGenericView(string);
		}


		//group method stub
		@Override
		public Object getGroup(int groupPosition) {
			// TODO Auto-generated method stub
			return group.get(groupPosition);
		}

		@Override
		public int getGroupCount() {
			// TODO Auto-generated method stub
			return group.size();
		}

		@Override
		public long getGroupId(int groupPosition) {
			// TODO Auto-generated method stub
			return groupPosition;
		}

		@Override
		public View getGroupView(int groupPosition, boolean isExpanded,
				View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			String string = group.get(groupPosition);
			return getGenericView(string);
		}

		//View stub to create Group/Children 's View
		public 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;
        }
		
		
		
		@Override
		public boolean hasStableIds() {
			// TODO Auto-generated method stub
			return false;
		}

		@Override
		public boolean isChildSelectable(int groupPosition, int childPosition) {
			// TODO Auto-generated method stub
			return true;
		}
    	
    	
    }

5. emulator 运行截图：

6. 下面说一下 数据更新 问题 包括：添加数据 删除数据

* 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>

* 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 stub
				String[] 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 stub
				dialogAdd.dismiss();
			}
        });
    }

 

* 运行截图：

 

* 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>

* 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 stub
				
				String 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 stub
				dialogDelete.dismiss();
			}
        });
    }

* 运行截图：

 

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

expandList.setOnGroupClickListener(new OnGroupClickListener(){

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

			@Override
			public boolean onChildClick(ExpandableListView arg0, View arg1,
					int arg2, int arg3, long arg4) {
				// TODO Auto-generated method stub
				Toast.makeText(activity,"[Child Click]:"+arg2+":"+arg3,Toast.LENGTH_LONG).show();
				
				return false;
			}
        	
        });

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