当用户单击 ExpandableListView 的 childitem 时,我试图检索 childitem。为此,我的 Activity 和 ListAdapter 类如下..
主要 Activity :-
public class MainActivity extends Activity {
NewAdapter mNewAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ExpandableListView expandbleLis = (ExpandableListView) findViewById(R.id.expandableListView);
expandbleLis.setDividerHeight(2);
expandbleLis.setGroupIndicator(null);
expandbleLis.setClickable(true);
setGroupData();
setChildGroupData();
mNewAdapter = new NewAdapter(groupItem, childItem);
mNewAdapter
.setInflater(
(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE),
this);
expandbleLis.setAdapter(mNewAdapter);
expandbleLis.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
Toast.makeText(MainActivity.this,
"GroupItem Clicked" + groupItem.get(groupPosition),
Toast.LENGTH_LONG).show();
return false;
}
});
expandbleLis.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
Toast.makeText(MainActivity.this, "ChildItem Clicked",
Toast.LENGTH_LONG).show();
return false;
}
});
}
public void setGroupData() {
groupItem.add("TechNology");
groupItem.add("Mobile");
groupItem.add("Manufacturer");
groupItem.add("Extras");
}
ArrayList<String> groupItem = new ArrayList<String>();
ArrayList<Object> childItem = new ArrayList<Object>();
public void setChildGroupData() {
/**
* Add Data For TecthNology
*/
ArrayList<String> child = new ArrayList<String>();
child.add("Java");
child.add("Drupal");
child.add(".Net Framework");
child.add("PHP");
childItem.add(child);
/**
* Add Data For Mobile
*/
child = new ArrayList<String>();
child.add("Android");
child.add("Window Mobile");
child.add("iPHone");
child.add("Blackberry");
childItem.add(child);
/**
* Add Data For Manufacture
*/
child = new ArrayList<String>();
child.add("HTC");
child.add("Apple");
child.add("Samsung");
child.add("Nokia");
childItem.add(child);
/**
* Add Data For Extras
*/
child = new ArrayList<String>();
child.add("Contact Us");
child.add("About Us");
child.add("Location");
child.add("Root Cause");
childItem.add(child);
}
}
列表适配器:-
public class NewAdapter extends BaseExpandableListAdapter {
public ArrayList<String> groupItem, tempChild;
public ArrayList<Object> Childtem = new ArrayList<Object>();
public LayoutInflater minflater;
public Activity activity;
public NewAdapter(ArrayList<String> grList, ArrayList<Object> childItem) {
groupItem = grList;
this.Childtem = childItem;
}
public void setInflater(LayoutInflater mInflater, Activity act) {
this.minflater = mInflater;
activity = act;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return null;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
tempChild = (ArrayList<String>) Childtem.get(groupPosition);
TextView text = null;
if (convertView == null) {
convertView = minflater.inflate(R.layout.childrow, null);
}
text = (TextView) convertView.findViewById(R.id.textView1);
text.setText(tempChild.get(childPosition));
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return ((ArrayList<String>) Childtem.get(groupPosition)).size();
}
@Override
public Object getGroup(int groupPosition) {
return null;
}
@Override
public int getGroupCount() {
return groupItem.size();
}
@Override
public void onGroupCollapsed(int groupPosition) {
super.onGroupCollapsed(groupPosition);
}
@Override
public void onGroupExpanded(int groupPosition) {
super.onGroupExpanded(groupPosition);
}
@Override
public long getGroupId(int groupPosition) {
return 0;
}
@Override
public View getGroupView(final int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
// isExpanded = false;
if (convertView == null) {
convertView = minflater.inflate(R.layout.grouprow, null);
}
((CheckedTextView) convertView).setText(groupItem.get(groupPosition));
((CheckedTextView) convertView).setChecked(isExpanded);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
我在谷歌上尝试过 this 但没有用,我没有从中获取子项。请帮忙做这件事。
在尝试了许多可能的解决方案后,我发布了这个请尝试帮助我不要投票,如果您投票否决说可能的解决方案,那么我会同意..
最佳答案
多个问题:
isChildSelectable()
以返回 true
。 android:clickable="true"
根 childrow.xml
中删除 LinearLayout
。 (或者,将点击处理程序添加到 LinearLayout
本身。) getGroup()
和 getChild()
以返回实际对象而不是 null
和 getGroupId()
和 getChildId()
以返回本地唯一标识符。也就是说,组内的子 ID 需要是唯一的,但它们在组之间不需要是唯一的。在您的情况下,将子/组位置作为 id 返回即可。 关于android - 从 ExpandableListView 检索 ChildItem?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/16055819/