5
Tôi đang cố gắng xây dựng ứng dụng Android cơ bản bằng cách sử dụng ExpandableListView. Sau khi đưa dữ liệu vào xem, tôi chỉ thấy các nhóm, nếu tôi nhấp vào các nhóm mà họ không mở rộng.Mở rộngListView luôn bị thu hẹp
Đây là mã của tôi, ai đó có thể giúp bạn?
Adaptor
public class PhraseAdapter extends BaseExpandableListAdapter {
private LayoutInflater inflater;
private List data;
public PhraseAdapter(Context context) {
inflater = LayoutInflater.from(context);
}
public void setData(List data) {
this.data = data;
}
public View inflate(int viewId) {
View view = inflater.inflate(viewId, null);
return view;
}
public void updateView(List categories) {
setData(categories);
notifyDataSetChanged();
}
static class ViewHolder {
TextView name;
}
static class ViewChildHolder {
TextView phonetix;
TextView orginal;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return data.get(groupPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final ViewChildHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.phrases__extra_item, null);
holder = new ViewChildHolder();
holder.phonetix = (TextView) convertView
.findViewById(R.id.phrases_phonetix);
holder.orginal = (TextView) convertView
.findViewById(R.id.phrases_original);
convertView.setTag(holder);
convertView.setClickable(true);
} else {
holder = (ViewChildHolder) convertView.getTag();
}
holder.phonetix.setText(data.get(groupPosition).getPhonetix());
holder.orginal.setText(data.get(groupPosition).getOriginal());
convertView.setFocusableInTouchMode(true);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return 1;
}
@Override
public Object getGroup(int groupPosition) {
return data.get(groupPosition);
}
@Override
public int getGroupCount() {
return data.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.phrases_item, null);
holder = new ViewHolder();
holder.name = (TextView) convertView
.findViewById(R.id.phrases_text);
convertView.setTag(holder);
convertView.setClickable(true);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.name.setText(data.get(groupPosition).getName());
return convertView;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
PhrasesActivity
public class PhrasesActivity extends Activity {
private PhraseAdapter phraseAdapter;
private PhraseDao dao;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.phrases);
dao = new PhraseDao();
final ExpandableListView mainListView = (ExpandableListView) findViewById(R.id.phrases_list);
phraseAdapter = new PhraseAdapter(this);
phraseAdapter.setData(dao.getPhrasesByCategoryId(1));
mainListView.setAdapter(phraseAdapter);
}
}
Và xml đơn giản bố trí
phrases.xml
<?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:orientation="vertical" >
<ExpandableListView
android:id="@+id/phrases_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:groupIndicator="@null"
android:clickable="true" />
</LinearLayout>
phrases_item.xml
012.351.<?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="wrap_content"
android:clickable="true"
android:gravity="center_vertical|left"
android:orientation="vertical"
android:paddingBottom="0dip"
android:paddingLeft="20dip"
android:paddingRight="20dip"
android:paddingTop="0dip" >
<TextView
android:id="@+id/phrases_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="0dip"
android:paddingLeft="0dip"
android:paddingRight="0dip"
android:paddingTop="0dip" >
</TextView>
</LinearLayout>
phrases__extra_item.xml
<?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="wrap_content"
android:clickable="true"
android:gravity="center_vertical|left"
android:orientation="vertical"
android:paddingBottom="0dip"
android:paddingLeft="20dip"
android:paddingRight="20dip"
android:paddingTop="0dip" >
<TextView
android:id="@+id/phrases_phonetix"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="0dip"
android:paddingLeft="0dip"
android:paddingRight="0dip"
android:paddingTop="0dip" >
</TextView>
<TextView
android:id="@+id/phrases_original"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="0dip"
android:paddingLeft="0dip"
android:paddingRight="0dip"
android:paddingTop="0dip" >
</TextView>
</LinearLayout>
nhờ
Tất cả các danh sách con luôn chứa chỉ một bản ghi, dữ liệu đến từ cùng một danh sách mảng – PulsAm