私はAndroidプログラミングの初心者です。http://shenhengbin.wordpress.comからコードをダウンロードして正常に動作しましたが、唯一の問題は onChildClick をトリガーしないことです。
主な活動はこちら
public class MenuCategory extends Activity {
private ExpandableListView mExpandableListView;
private List<GroupEntity> mGroupCollection;
ExpandableListAdapter adapter;
@Override
public void onCreate(Bundle savedInstanceStater) {
super.onCreate(savedInstanceState);
setContentView(R.layout.menucategory);
prepareResource();
initPage();
}
private void prepareResource() {
String data = null;
FileInputStream fIn = null;
InputStreamReader isr = null;
String response = null;
String getParam = "?get=menuCategory";
try{
fIn = openFileInput("fromfile.dat");
isr = new InputStreamReader(fIn);
int size = fIn.available();
char[] inputBuffer = new char[size];
isr.read(inputBuffer);
data = new String(inputBuffer);
isr.close();
fIn.close();
String[] dataSep = data.split("#");
String Hs = dataSep[0];
try {
response = CustomHttpClient.executeHttpGet(Hs+getParam);
String res = response.toString();
if(response.length()!=0){
mGroupCollection = new ArrayList<GroupEntity>();
JSONObject jsonObject = null;
JSONArray eventArray = new JSONArray(res);
for (int i = 0; i < eventArray.length(); i++) {
jsonObject = eventArray.getJSONObject(i);
GroupEntity ge = new GroupEntity();
ge.Name = jsonObject.getString("Cat");
JSONArray abc = jsonObject.getJSONArray("SubCat");
for (int j=0; j<abc.length(); j++){
GroupItemEntity gi = ge.new GroupItemEntity();
gi.Name = abc.getString(j);
ge.GroupItemCollection.add(gi);
}
mGroupCollection.add(ge);
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}catch(IOException e){
e.printStackTrace(System.err);
}
}
private void initPage() {
mExpandableListView = (ExpandableListView) findViewById(R.id.expandableListView);
adapter = new ExpandableListAdapter(this,mExpandableListView, mGroupCollection);
mExpandableListView.setAdapter(adapter);
registerForContextMenu(mExpandableListView);
}
public boolean onChildClick( ExpandableListView parent, View v, int groupPosition,int childPosition,long id) {
String string = "Child Click";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(getApplicationContext(), string, duration);
toast.show();
return false;
}
}
カスタム BaseExpandableListAdapter は次のとおりです。
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context mContext;
private ExpandableListView mExpandableListView;
private List<GroupEntity> mGroupCollection;
private int[] groupStatus;
private int lastExpandedGroupPosition;
public ExpandableListAdapter(Context pContext,
ExpandableListView pExpandableListView,
List<GroupEntity> pGroupCollection) {
mContext = pContext;
mGroupCollection = pGroupCollection;
mExpandableListView = pExpandableListView;
groupStatus = new int[mGroupCollection.size()];
setListEvent();
}
private void setListEvent() {
mExpandableListView
.setOnGroupExpandListener(new OnGroupExpandListener() {
public void onGroupExpand(int arg0) {
// TODO Auto-generated method stub
groupStatus[arg0] = 1;
lastExpandedGroupPosition = arg0;
}
});
mExpandableListView
.setOnGroupCollapseListener(new OnGroupCollapseListener() {
public void onGroupCollapse(int arg0) {
// TODO Auto-generated method stub
groupStatus[arg0] = 0;
}
});
}
public String getChild(int arg0, int arg1) {
// TODO Auto-generated method stub
return mGroupCollection.get(arg0).GroupItemCollection.get(arg1).Name;
}
public long getChildId(int arg0, int arg1) {
// TODO Auto-generated method stub
return 0;
}
public View getChildView(int arg0, int arg1, boolean arg2, View arg3,
ViewGroup arg4) {
// TODO Auto-generated method stub
ChildHolder childHolder;
if (arg3 == null) {
arg3 = LayoutInflater.from(mContext).inflate(
R.layout.list_group_item, null);
childHolder = new ChildHolder();
childHolder.title = (TextView) arg3.findViewById(R.id.item_title);
arg3.setTag(childHolder);
}else {
childHolder = (ChildHolder) arg3.getTag();
}
childHolder.title.setText(mGroupCollection.get(arg0).GroupItemCollection.get(arg1).Name);
return arg3;
}
public int getChildrenCount(int arg0) {
// TODO Auto-generated method stub
return mGroupCollection.get(arg0).GroupItemCollection.size();
}
public Object getGroup(int arg0) {
// TODO Auto-generated method stub
return mGroupCollection.get(arg0);
}
public int getGroupCount() {
// TODO Auto-generated method stub
return mGroupCollection.size();
}
public long getGroupId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
public View getGroupView(int arg0, boolean arg1, View arg2, ViewGroup arg3) {
// TODO Auto-generated method stub
GroupHolder groupHolder;
if (arg2 == null) {
arg2 = LayoutInflater.from(mContext).inflate(R.layout.list_group,
null);
groupHolder = new GroupHolder();
groupHolder.img = (ImageView) arg2.findViewById(R.id.tag_img);
groupHolder.title = (TextView) arg2.findViewById(R.id.group_title);
arg2.setTag(groupHolder);
} else {
groupHolder = (GroupHolder) arg2.getTag();
}
if (groupStatus[arg0] == 0) {
groupHolder.img.setImageResource(R.drawable.group_down);
} else {
groupHolder.img.setImageResource(R.drawable.group_up);
}
groupHolder.title.setText(mGroupCollection.get(arg0).Name);
return arg2;
}
class GroupHolder {
ImageView img;
TextView title;
}
class ChildHolder {
TextView title;
}
public boolean hasStableIds() {
// TODO Auto-generated method stub
return true;
}
public boolean isChildSelectable(int arg0, int arg1) {
// TODO Auto-generated method stub
return true;
}
@Override
public void onGroupExpanded(int groupPosition){
//collapse the old expanded group, if not the same
//as new group to expand
if(groupPosition != lastExpandedGroupPosition){
mExpandableListView.collapseGroup(lastExpandedGroupPosition);
}
super.onGroupExpanded(groupPosition);
lastExpandedGroupPosition = groupPosition;
}
}
アイテム グループのレイアウト
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/group_header_bg"
android:gravity="center_vertical" >
<ImageView
android:id="@+id/tag_img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginRight="10dip"
android:src="@drawable/group_down"
android:focusable="false"
/>
<TextView
android:id="@+id/group_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="10dip"
android:text=""
android:textColor="#57810f"
android:textSize="18dip"
android:textStyle="bold"
android:focusable="false"
/>
</RelativeLayout>
ここにアイテムの子レイアウトがあります
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:baselineAligned="false"
android:paddingTop="5dip" >
<LinearLayout
android:id="@+id/groupItem"
android:layout_width="0dip"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="@drawable/play_group_item"
android:clickable="true" >
<TextView
android:id="@+id/item_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="15dip"
android:layout_marginLeft="15dip"
android:text="sample"
android:textColor="#FFF38585"
android:textSize="20sp"
android:focusable="false"
/>
</LinearLayout>
</LinearLayout>
私を助けてください