我正在尝试在列表视图的选定行中放置复选标记，但复选标记未显示。我对Android很陌生，所以我知道我要么缺少某些东西，要么做错了。
public class SettingsFragment extends Fragment {
private ListView defaultScreen;
private static SharedPreferences sharedPref;
private static SharedPreferences.Editor editor;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View rootView = inflater.inflate(R.layout.fragment_benefits, null);
Benefits mediaData[] = new Benefits[] {
new Benefits(R.drawable.ag_news, "Ag News"),
new Benefits(R.drawable.action_alerts, "Action Alerts"),
new Benefits(R.drawable.market, "Market Updates"),
new Benefits(R.drawable.magazine, "KFB Magazine"),
new Benefits(R.drawable.ag_facts, "Ag Facts"),
new Benefits(R.drawable.member_benefits, "Member Benefits"),
new Benefits(R.drawable.roadside_markets, "Roadside Farm Markets"),
new Benefits(R.drawable.media, "Media"),
new Benefits(R.drawable.annual_meeting, "Annual Meeting"),
new Benefits(R.drawable.my_kyfb, "My KYFB"),
};
BenefitsAdapter adapter = new BenefitsAdapter(this.getActivity(), R.layout.benefits_item, mediaData);
defaultScreen = (ListView)rootView.findViewById(R.id.listFeed);
defaultScreen.setChoiceMode(AbsListView.CHOICE_MODE_SINGLE);
defaultScreen.setAdapter(adapter);
defaultScreen.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch(position) {
case 0:
sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("DEFAULT", "ag news");
editor.apply();
defaultScreen.setItemChecked(0, true);
break;
case 1:
sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("DEFAULT", "action alerts");
editor.apply();
defaultScreen.setItemChecked(1, true);
break;
case 2:
sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("DEFAULT", "market updates");
editor.apply();
defaultScreen.setItemChecked(2, true);
break;
case 3:
sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("DEFAULT", "kfb magazine");
editor.apply();
defaultScreen.setItemChecked(3, true);;
break;
case 4:
sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("DEFAULT", "ag facts");
editor.apply();
defaultScreen.setItemChecked(4, true);
break;
case 5:
sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("DEFAULT", "member benefits");
editor.apply();
defaultScreen.setItemChecked(5, true);
break;
case 6:
sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("DEFAULT", "roadside markets");
editor.apply();
defaultScreen.setItemChecked(6, true);
break;
case 7:
sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("DEFAULT", "media");
editor.apply();
defaultScreen.setItemChecked(7, true);
break;
case 8:
sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("DEFAULT", "annual meeting");
editor.apply();
defaultScreen.setItemChecked(8, true);
break;
case 9:
sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
editor = sharedPref.edit();
editor.putString("DEFAULT", "my kyfb");
editor.apply();
defaultScreen.setItemChecked(9, true);
break;
default:
break;
}
}
});
return rootView;
}
}
这是适配器。
public class BenefitsAdapter extends ArrayAdapter<Benefits> {
Context context;
int layoutResourceId;
Benefits data[] = null;
public BenefitsAdapter(Context context, int layoutResourceId, Benefits[] data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
BenefitsHolder holder = null;
if(row == null) {
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new BenefitsHolder();
holder.imgIcon = (ImageView)row.findViewById(R.id.imgIcon);
holder.textTitle = (TextView)row.findViewById(R.id.textTitle);
row.setTag(holder);
}
else {
holder = (BenefitsHolder)row.getTag();
}
Benefits benefits = data[position];
holder.textTitle.setText(benefits.title);
holder.imgIcon.setImageResource(benefits.icon);
return row;
}
static class BenefitsHolder {
ImageView imgIcon;
TextView textTitle;
}
}
fragment_benefits xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/plain_background">
<ListView
android:id="@+id/listFeed"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:fadeScrollbars="true"
android:fastScrollEnabled="true"
android:fadingEdge="none"
android:divider="@color/kfb_blue"
android:dividerHeight="1dp"
android:background="@color/plain_background"/>
</RelativeLayout>
benefits_item xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp"
android:background="@color/plain_background">
<de.hdodenhof.circleimageview.CircleImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/imgIcon"
android:layout_width="50dp"
android:layout_height="50dp"
android:gravity="center_vertical"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:layout_marginRight="15dp"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
app:border_width="2dp"
app:border_color="#00000000"/>
<TextView
android:id="@+id/textTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:textStyle="normal"
android:textSize="22dp"
android:textColor="@color/kfb_blue"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"/>
</LinearLayout>
答案 0 :(得分：1)
由于行布局中没有复选标记，因此无法在每行旁边显示复选标记： - ）
如果你想要复选标记，你必须使用像android.R.layout.simple_list_item_multiple_choice这样的基本布局并牺牲图像，或者如果你想要一个带有复选标记的自定义布局，你必须在行布局中加上一个复选标记并实现Checkable对于物品。
看看这里：how to set choice mode single for listview with images
希望它有所帮助。