在我的 Android 应用程序中,我正在尝试构建我的第一个自定义列表适配器。我现在设法让它显示一项,但不幸的是,列表中有 8 个项目时,只能显示一项。我的适配器如下所示:
public class PossibilitiesAdapter extends BaseAdapter {
private AdapterCallbacks callbacks;
private List<String> possibilitiesList = new ArrayList<String>();
private LayoutInflater inflater;
public PossibilitiesAdapter(Context context) {
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void setPossibilitiesList(List<String> possibilitiesList) {
for (String possibility : possibilitiesList) {
addItem(possibility);
}
}
public void addItem (final String item) {
possibilitiesList.add(item);
notifyDataSetChanged();
}
private class ViewHolder {
TextView possibilityTitle;
}
@Override
public View getView(final int position, View convertView, ViewGroup viewGroup) {
ViewHolder holder = new ViewHolder();
convertView = inflater.inflate(R.layout.list_item_posibility, viewGroup, false);
holder.possibilityTitle = (TextView) convertView.findViewById(R.id.text_possibility);
holder.possibilityTitle.setText(possibilitiesList.get(position));
return convertView;
}
@Override
public int getCount() {
return possibilitiesList.size();
}
// And here are some more things like getItemId() and getItem()
}
我从我的片段中设置了possibilityList,如下所示:
List<String> list = Arrays.asList(getResources().getStringArray(R.array.the_possibilities));
Log.e(this, new Integer(list.size()).toString()); // Outputs 8, so there are enough in the array.
adapter.setPossibilitiesList(list);
我的fragment_possibilities.xml 如下所示:
<ListView
android:id="@+id/list_possibilities"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
和我的 list_item_possibility.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/text_possibility"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
所以问题是它只显示第一项,仅此而已。有人知道问题是什么以及我该如何解决它吗?