Java 可展开的子listview项目单击图像
在上图中，我想在子listview项中按下加号按钮时将textview（红色）值增加1，按下减号时将textview（红色）值减少1。我不想单击整个列表项，只想单击正负图像视图。现在发生的事情是，我必须双击列表项来增加或减少textView（红色）的值。另外，当我滚动listview时，listitems上的值会自动消失。如何解决这两个问题。请帮忙 listitem.xmlJava 可展开的子listview项目单击图像,java,android,xml,listview,expandablelistview,Java,Android,Xml,Listview,Expandablelistview,在上图中，我想在子listview项中按下加号按钮时将textview（红色）值增加1，按下减号时将textview（红色）值减少1。我不想单击整个列表项，只想单击正负图像视图。现在发生的事情是，我必须双击列表项来增加或减少textView（红色）的值。另外，当我滚动listview时，listitems上的值会自动消失。如何解决这两个问题。请帮忙 listitem.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:orientation="horizontal" >
<TextView
android:id="@+id/tv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="15sp"
android:layout_marginBottom="5dp"
android:text="tv_name"
android:textColor="#000000"
/>
<TextView
android:id="@+id/tv_price"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="15sp"
android:layout_marginBottom="5dp"
android:gravity="right"
android:text="tv_price"
android:textColor="#000000"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:orientation="horizontal" >
<TextView
android:id="@+id/tv_desp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp"
android:layout_weight="1"
android:text="tv_desp"
android:textColor="@android:color/darker_gray"
/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="right"
android:orientation="horizontal" >
<ImageView
android:id="@+id/iv_minus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:descendantFocusability="blocksDescendants"
android:padding="5dp"
android:src="@drawable/minus" />
<TextView
android:id="@+id/tv_no_items"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="0"
android:textColor="@android:color/holo_red_dark"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
/>
<ImageView
android:id="@+id/iv_plus"
android:focusable="false"
android:padding="5dp"
android:descendantFocusability="blocksDescendants"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/plus" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/lvItems"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:dividerHeight="2dp"
android:focusable="true" />
<TextView
android:id="@+id/tv_items_wo_sub_headers"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="tv_sub_headers"
android:textSize="15sp" />
</LinearLayout>
public class SubheadersFragment extends Fragment {
private int mResourceId;
TextView tv_sub_headers;
String sub_headers_string;
String sub_header,item;
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
TextView tv_no_items,childPosition;
HashMap<String, List<String>> listDataChild;
String[] items;
int no_of_items;
public static SubheadersFragment newInstance(int resourceId,String tv_sub_headers ) {
SubheadersFragment widgetFragment = new SubheadersFragment();
widgetFragment.mResourceId = resourceId;
widgetFragment.sub_headers_string=tv_sub_headers;
return widgetFragment;
}
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(mResourceId, container, false);
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
tv_sub_headers= (TextView) view.findViewById(R.id.tv_sub_headers);
expListView = (ExpandableListView) view.findViewById(R.id.lvExpSH);
tv_sub_headers.setText(sub_headers_string);
try {
JSONArray jArraySub_headers=new JSONArray(sub_headers_string);
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
items=new String[jArraySub_headers.length()];
for (int i = 0; i <jArraySub_headers.length(); i++) {//headers
JSONObject c = jArraySub_headers.getJSONObject(i);
sub_header = c.getString("sub_header");
item = c.getString("items");
items[i]=item;
listDataHeader.add(c.getString("sub_header"));
}
///for (int j = 0; j < items.length; j++) {
JSONArray jArrayItemsVeg=new JSONArray(items[0]);
List<String> vegListString = new ArrayList<String>();
for (int j = 0; j <jArrayItemsVeg.length(); j++) {//headers
JSONObject c = jArrayItemsVeg.getJSONObject(j);
// vegListString.add(c.getString("name")+"*"+c.getString("price")+"*"+c.getString("description"));
//
if(c.has("item_types"))
vegListString.add(c.getString("name")+"*"+c.getString("price")+"*"+c.getString("description")+"*"+c.getString("item_types"));
else
vegListString.add(c.getString("name")+"*"+c.getString("price")+"*"+c.getString("description"));
//
//
}
JSONArray jArrayItemsNONVeg=new JSONArray(items[1]);
List<String> NonvegListString = new ArrayList<String>();
for (int j = 0; j <jArrayItemsNONVeg.length(); j++) {//headers
JSONObject c = jArrayItemsNONVeg.getJSONObject(j);
// NonvegListString.add(c.getString("name"));
// if(c.has("description"))
if(c.has("item_types"))
NonvegListString.add(c.getString("name")+"*"+c.getString("price")+"*"+c.getString("description")+"*"+c.getString("item_types"));
else
NonvegListString.add(c.getString("name")+"*"+c.getString("price")+"*"+c.getString("description"));
//
// else
// NonvegListString.add(c.getString("name")+"*"+c.getString("price"));
}
listDataChild.put(listDataHeader.get(0), vegListString); // Header, Child data
listDataChild.put(listDataHeader.get(1), NonvegListString);
// }
listAdapter = new ExpandableListAdapter(getActivity(), listDataHeader, listDataChild);
expListView.setAdapter(listAdapter);
expListView.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
ImageView iv_plus= (ImageView)v.findViewById(R.id.iv_plus);
ImageView iv_minus= (ImageView)v.findViewById(R.id.iv_minus);
tv_no_items= (TextView)v.findViewById(R.id.tv_no_items);
iv_plus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
no_of_items=Integer.parseInt(tv_no_items.getText().toString())+1;
tv_no_items.setText(no_of_items+"");
}
});
iv_minus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(no_of_items>0){
no_of_items=Integer.parseInt(tv_no_items.getText().toString())-1;
tv_no_items.setText(no_of_items+"");
}
}
});
String header=listDataHeader.get(groupPosition);
String items=listDataChild.get(
listDataHeader.get(groupPosition)).get(
childPosition);
String[] itemsArray=items.split(Pattern.quote("*"));
Toast.makeText(
getActivity()
,
itemsArray[itemsArray.length-1]
, Toast.LENGTH_SHORT)
.show();
return false;
}
});
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void prepareListData() {
listDataHeader = new ArrayList<String>();
// Adding child data
// listDataHeader.add("Top 250");
// listDataHeader.add("Now Showing");
// listDataHeader.add("Coming Soon..");
// Adding child data
List<String> top250 = new ArrayList<String>();
top250.add("The Shawshank Redemption");
top250.add("The Godfather");
top250.add("The Godfather: Part II");
top250.add("Pulp Fiction");
top250.add("The Good, the Bad and the Ugly");
top250.add("The Dark Knight");
top250.add("12 Angry Men");
List<String> nowShowing = new ArrayList<String>();
nowShowing.add("The Conjuring");
nowShowing.add("Despicable Me 2");
nowShowing.add("Turbo");
nowShowing.add("Grown Ups 2");
nowShowing.add("Red 2");
nowShowing.add("The Wolverine");
List<String> comingSoon = new ArrayList<String>();
comingSoon.add("2 Guns");
comingSoon.add("The Smurfs 2");
comingSoon.add("The Spectacular Now");
comingSoon.add("The Canyons");
comingSoon.add("Europa Report");
}
}
公共类子标题片段扩展片段{
私有资源；
TextView tv_sub_标题；
字符串子标题\u字符串；
字符串子标题，项目；
可扩展列表适配器；
ExpandableListView解释视图；
列表列表数据头；
TextView tv_no_项目，儿童位置；
HashMapListDataChild；
字符串[]项；
int no_of_项目；
公共静态子标题Fragment newInstance（int resourceId、字符串tv\u子标题）{
SubheadersFragment widgetFragment=新的SubheadersFragment（）；
widgetFragment.mResourceId=resourceId；
widgetFragment.sub_headers_string=tv_sub_headers；
返回widgetFragment；
}
@凌驾
创建视图上的公共视图（更平坦的充气机，
视图组容器，
Bundle savedInstanceState）{
返回充气机。充气（mResourceId，容器，假）；
}
@凌驾
已创建视图上的公共无效（视图，捆绑包savedInstanceState）{
tv_sub_headers=（TextView）view.findviewbyd（R.id.tv_sub_headers）；
expListView=（ExpandableListView）view.findViewById（R.id.lvExpSH）；
tv_sub_headers.setText（sub_headers_string）；
试一试{
JSONArray jArraySub_headers=新的JSONArray（sub_headers_字符串）；
listDataHeader=新的ArrayList（）；
listDataChild=newHashMap（）；
items=新字符串[jArraySub_headers.length（）]；
对于（int i=0；i 4）{
tv_desp.setText（“”）；
}
其他的
tv_desp.setText（itemsArray[2]）；
}
其他的
tv_desp.setText（“”）；
//ImageView iv_plus=（ImageView）convertView.findViewById（R.id.iv_plus）；
//ImageView iv_减号=（ImageView）convertView.findViewById（R.id.iv_减号）；
//tv_no_items=（TextView）convertView.findViewById（R.id.tv_no_items）；
//iv_plus.setOnClickListener（新视图.OnClickListener（）{
//@覆盖
//公共void onClick（视图v）{
////TODO自动生成的方法存根
//no_of_items=Integer.parseInt（tv_no_items.getText（）.toString（））+1；
//tv_no_items.setText（no_of_items+）；
//
// }
// });
//
//iv_减去.setOnClickListener（新视图.OnClickListener（）{
//
//@覆盖
//公共void onClick（视图v）{
////TODO自动生成的方法存根
//如果（没有项目>0的项目）{
//
//no_of_items=Integer.parseInt（tv_no_items.getText（）.toString（））-1；
//tv_no_items.setText（no_of_items+）；
// }
// }
// });
返回视图；
}
@凌驾
公共整数getChildrenCount（整数组位置）{
返回此。_listDataChild.get（此。_listDataHeader.get（groupPosition））
.size（）；
}
@凌驾
公共对象getGroup（int-groupPosition）{
返回此。\u listDataHeader.get（groupPosition）；
}
@凌驾
public int getGroupCount（）{
返回此值。_listDataHeader.size（）；
}
@凌驾
公共长getGroupId（int-groupPosition）{
返回组位置；
}
@凌驾
公共视图getGroupView（int-groupPosition，布尔值isExpanded，
视图（视图、视图组父级）{
字符串头文件=（字符串）getGroup（groupPosition）；
if（convertView==null）{
LayoutInflater infalInflater=（LayoutInflater）this.\u上下文
.getSystemService（上下文布局\充气机\服务）；
convertView=infalInflater.充气（R.layout.list_组，空）；
}
TextView lblistheader=（TextView）convertView
.findviewbyd（R.id.lblistheader）；
lblListHeader.setTypeface（null，Typeface.BOLD）；
lblListHeader.setText（标题）；
返回视图；
}
@凌驾
公共布尔表ID（）{
返回false；
}
@凌驾
公共布尔值isChildSelectable（int-groupPosition，int-childPosition）{
返回true；
}
}
public class ExpandableListAdapter extends BaseExpandableListAdapter {
int no_of_items;
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
TextView tv_no_items;
public ExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final String childText = (String) getChild(groupPosition, childPosition);
String[] itemsArray=childText.split(Pattern.quote("*"));
// if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_item, null);
//}
TextView tv_name = (TextView) convertView
.findViewById(R.id.tv_name);
tv_name.setText(itemsArray[0]);
TextView tv_price = (TextView) convertView
.findViewById(R.id.tv_price);
tv_price.setText("\u20B9 "+itemsArray[1]);
TextView tv_desp = (TextView) convertView
.findViewById(R.id.tv_desp);
String fontPath = "fonts/RobotoCondensed-Regular.ttf";
Typeface tf = Typeface.createFromAsset(_context.getAssets(), fontPath);
tv_name.setTypeface(tf);
tv_price.setTypeface(tf);
tv_desp.setTypeface(tf);
//Toast.makeText(_context, Arrays.toString(itemsArray), Toast.LENGTH_LONG).show();
if(itemsArray.length>=3){
;
if(itemsArray[2].contains("{") && itemsArray[2].indexOf("{")>4 ){
tv_desp.setText("");
}
else
tv_desp.setText(itemsArray[2]);
}
else
tv_desp.setText("");
// ImageView iv_plus= (ImageView)convertView.findViewById(R.id.iv_plus);
// ImageView iv_minus= (ImageView)convertView.findViewById(R.id.iv_minus);
// tv_no_items= (TextView)convertView.findViewById(R.id.tv_no_items);
// iv_plus.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
// // TODO Auto-generated method stub
// no_of_items=Integer.parseInt(tv_no_items.getText().toString())+1;
// tv_no_items.setText(no_of_items+"");
//
// }
// });
//
// iv_minus.setOnClickListener(new View.OnClickListener() {
//
// @Override
// public void onClick(View v) {
// // TODO Auto-generated method stub
// if(no_of_items>0){
//
// no_of_items=Integer.parseInt(tv_no_items.getText().toString())-1;
// tv_no_items.setText(no_of_items+"");
// }
// }
// });
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}