Android - 自定义 ArrayAdapter - 无法识别对 ListItems 的点击
Android - Custom ArrayAdapter - Clicks on ListItems are not recognized
我实现了一个自定义 ArrayAdapter
,这会导致 ListView
无法识别对 ListItem 的 TextView 元素的任何点击;但是,单击 ListItem 的 ImageView
元素会产生预期的效果。我只是无法弄清楚这种行为是如何导致的,即使我按照教程进行操作也很困难。
当我使用标准 ArrayAdapater
.
时一切正常
我将包括所涉及的 类,因为我不知道他们中的哪一个与解决此问题相关。
CustomArrayAdapter:
public class ClassCustomArrayAdapter extends ArrayAdapter {
private ArrayList<ArrayList<String>> contactsArray;
private Context context;
public ClassCustomArrayAdapter(Context context, int textViewResourceId, ArrayList<ArrayList<String>> contactsArray) {
super(context, textViewResourceId, contactsArray);
this.contactsArray = contactsArray;
this.context = context;
}
private class ViewHolder{
ImageView imageView;
TextView textView;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
if(convertView == null) {
convertView = layoutInflater.inflate(R.layout.fragment_custom_listview_item, null);
viewHolder = new ViewHolder();
viewHolder.textView = (TextView) convertView.findViewById(R.id.tv);
viewHolder.imageView = (ImageView) convertView.findViewById(R.id.iv);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.textView.setText(String.format("%s %s", contactsArray.get(position).get(2), contactsArray.get(position).get(1)));
viewHolder.imageView.setImageResource(R.drawable.ic_baseline_person_24);
return convertView;
}
}
FragmentListContacts:
public class FragmentListContacts extends Fragment {
private ArrayList<ArrayList<String>> contacts_arraylist;
private ArrayList<ArrayList<String>> contacts_array_listview;
private ArrayAdapter<String> contact_ids;
private ArrayAdapter<ArrayList<String>> contacts_arrayadapter;
private ListView contacts_listview;
private FloatingActionButton add_contact_fab;
private Database db;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_list_contacts, container, false);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
contacts_listview = getActivity().findViewById(R.id.contacts_listview);
add_contact_fab = getActivity().findViewById(R.id.add_contact_fab);
initAddContactFAB();
db = new Database(getContext());
//db.insertNewContact("A", "B", "123", "321");
//db.insertNewContact("C", "D", "456", "654");
contacts_arraylist = new ArrayList<>();
contacts_arraylist.addAll(db.getContacts());
//contacts_arrayadapter = new ArrayAdapter<ArrayList<String>>(getContext(), android.R.layout.simple_list_item_1, android.R.id.text1, contacts_arraylist);
ClassCustomArrayAdapter classCustomArrayAdapter = new ClassCustomArrayAdapter(getContext(), R.layout.fragment_custom_listview_item, contacts_arraylist);
//contacts_listview.setAdapter(contacts_arrayadapter);
contacts_listview.setAdapter(classCustomArrayAdapter);
contacts_listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(getContext(), ActivityListNotesByContact.class);
startActivity(intent);
}
});
registerForContextMenu(contacts_listview);
}
...
}
custom_listview_item:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
>
<ImageView
android:id="@+id/iv"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:layout_marginRight="15dp"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
android:longClickable="true"
android:clickable="true"/>
<TextView
android:layout_width="match_parent"
android:layout_height="50dp"
android:id="@+id/tv"
android:gravity="center_vertical"
android:padding="5px"
android:layout_marginLeft="5dp"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:textSize="60px"
android:textColor="#000000"
android:background="#FFFFFF"
android:longClickable="true"
android:clickable="true"/>
</LinearLayout>
提前致谢!
ListView
setOnItemClickListener
拦截列表项根视图的点击,当您启用 TextView
可点击时,它有自己的点击监听器不会被 ListView
setOnItemClickListener
.
拦截
解法:
您需要将 TextView
和 ImageView
设为不可点击或聚焦
android:clickable="false"
android:focusable="false"
您可以使用下面的列表项布局..
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="@+id/iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_marginRight="15dp"
android:layout_marginBottom="5dp"
android:gravity="center_vertical"
android:clickable="false"
android:focusable="false"/>
<TextView
android:id="@+id/tv"
android:layout_width="match_parent"
android:layout_height="50dp"
android:clickable="false"
android:focusable="false"
android:layout_marginLeft="5dp"
android:background="#FFFFFF"
android:gravity="center_vertical"
android:textColor="#000000" />
</LinearLayout>
我实现了一个自定义 ArrayAdapter
,这会导致 ListView
无法识别对 ListItem 的 TextView 元素的任何点击;但是,单击 ListItem 的 ImageView
元素会产生预期的效果。我只是无法弄清楚这种行为是如何导致的,即使我按照教程进行操作也很困难。
当我使用标准 ArrayAdapater
.
我将包括所涉及的 类,因为我不知道他们中的哪一个与解决此问题相关。
CustomArrayAdapter:
public class ClassCustomArrayAdapter extends ArrayAdapter {
private ArrayList<ArrayList<String>> contactsArray;
private Context context;
public ClassCustomArrayAdapter(Context context, int textViewResourceId, ArrayList<ArrayList<String>> contactsArray) {
super(context, textViewResourceId, contactsArray);
this.contactsArray = contactsArray;
this.context = context;
}
private class ViewHolder{
ImageView imageView;
TextView textView;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
if(convertView == null) {
convertView = layoutInflater.inflate(R.layout.fragment_custom_listview_item, null);
viewHolder = new ViewHolder();
viewHolder.textView = (TextView) convertView.findViewById(R.id.tv);
viewHolder.imageView = (ImageView) convertView.findViewById(R.id.iv);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.textView.setText(String.format("%s %s", contactsArray.get(position).get(2), contactsArray.get(position).get(1)));
viewHolder.imageView.setImageResource(R.drawable.ic_baseline_person_24);
return convertView;
}
}
FragmentListContacts:
public class FragmentListContacts extends Fragment {
private ArrayList<ArrayList<String>> contacts_arraylist;
private ArrayList<ArrayList<String>> contacts_array_listview;
private ArrayAdapter<String> contact_ids;
private ArrayAdapter<ArrayList<String>> contacts_arrayadapter;
private ListView contacts_listview;
private FloatingActionButton add_contact_fab;
private Database db;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_list_contacts, container, false);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
contacts_listview = getActivity().findViewById(R.id.contacts_listview);
add_contact_fab = getActivity().findViewById(R.id.add_contact_fab);
initAddContactFAB();
db = new Database(getContext());
//db.insertNewContact("A", "B", "123", "321");
//db.insertNewContact("C", "D", "456", "654");
contacts_arraylist = new ArrayList<>();
contacts_arraylist.addAll(db.getContacts());
//contacts_arrayadapter = new ArrayAdapter<ArrayList<String>>(getContext(), android.R.layout.simple_list_item_1, android.R.id.text1, contacts_arraylist);
ClassCustomArrayAdapter classCustomArrayAdapter = new ClassCustomArrayAdapter(getContext(), R.layout.fragment_custom_listview_item, contacts_arraylist);
//contacts_listview.setAdapter(contacts_arrayadapter);
contacts_listview.setAdapter(classCustomArrayAdapter);
contacts_listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(getContext(), ActivityListNotesByContact.class);
startActivity(intent);
}
});
registerForContextMenu(contacts_listview);
}
...
}
custom_listview_item:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
>
<ImageView
android:id="@+id/iv"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:layout_marginRight="15dp"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
android:longClickable="true"
android:clickable="true"/>
<TextView
android:layout_width="match_parent"
android:layout_height="50dp"
android:id="@+id/tv"
android:gravity="center_vertical"
android:padding="5px"
android:layout_marginLeft="5dp"
android:layout_alignParentTop="true"
android:layout_alignParentBottom="true"
android:textSize="60px"
android:textColor="#000000"
android:background="#FFFFFF"
android:longClickable="true"
android:clickable="true"/>
</LinearLayout>
提前致谢!
ListView
setOnItemClickListener
拦截列表项根视图的点击,当您启用 TextView
可点击时,它有自己的点击监听器不会被 ListView
setOnItemClickListener
.
解法:
您需要将 TextView
和 ImageView
设为不可点击或聚焦
android:clickable="false"
android:focusable="false"
您可以使用下面的列表项布局..
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="@+id/iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:layout_marginRight="15dp"
android:layout_marginBottom="5dp"
android:gravity="center_vertical"
android:clickable="false"
android:focusable="false"/>
<TextView
android:id="@+id/tv"
android:layout_width="match_parent"
android:layout_height="50dp"
android:clickable="false"
android:focusable="false"
android:layout_marginLeft="5dp"
android:background="#FFFFFF"
android:gravity="center_vertical"
android:textColor="#000000" />
</LinearLayout>