自定义列表视图上的上下文操作栏

Question

我需要在自定义列表视图上实现上下文操作栏以删除列表中选定的项目，我尝试了许多教程，但未获得结果

1) contextual_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
    android:id="@+id/item_delete"
    android:icon="@drawable/delete"
    app:showAsAction="ifRoom|withText"
    android:title="Delete"
    android:titleCondensed="Delete">
</item>
</menu>

2) main_activity.xml



 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="@drawable/background"
 android:paddingBottom="@dimen/activity_vertical_margin"
 android:paddingLeft="@dimen/activity_horizontal_margin"
 android:paddingRight="@dimen/activity_horizontal_margin"
 android:paddingTop="@dimen/activity_vertical_margin"
 tools:context=".MainActivity">

<RelativeLayout
    android:id="@+id/titlelayout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/btnbackicon"
        android:layout_width="40dp"
        android:layout_height="60dp"
        android:paddingLeft="-15dp"
        android:paddingStart="-15dp"
        android:paddingRight="-4dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_centerVertical="true"
        android:onClick="onBackIconClick"
        android:background="@drawable/back_arrow" />

    <ImageView
        android:id="@+id/gmmf_logo"
        android:layout_width="90dp"
        android:paddingLeft="-10dp"
        android:layout_height="90dp"
        android:layout_alignParentTop="true"
        android:layout_toRightOf="@+id/btnbackicon"
        android:onClick="onImageBackClick"
        android:src="@drawable/gmmf" />

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_toEndOf="@+id/gmmf_logo"
        android:layout_toRightOf="@+id/gmmf_logo"
        android:background="@drawable/text_bg"
        android:gravity="center"
        android:padding="20dip"
        android:text="@string/app_name"
        android:textColor="@color/whiteColor"
        android:textSize="30sp"
        android:textStyle="bold" />


</RelativeLayout>

<TextView
    android:id="@+id/txtActivityTitle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/titlelayout"
    android:text="Favorite Restaurants"
    android:textSize="55sp"
    android:background="@color/lightblack"
    android:gravity="center"
    android:textColor="@color/Orange"
    android:textStyle="bold"
    android:typeface="serif"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_alignRight="@+id/titlelayout"
    android:layout_alignEnd="@+id/titlelayout" />

<ListView
    android:id="@+id/list_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_centerVertical="true"
    android:choiceMode="multipleChoice"
    android:layout_marginTop="10dp"
    android:background="?android:attr/activatedBackgroundIndicator"
    android:layout_below="@+id/txtActivityTitle"></ListView>

</RelativeLayout>

3) list_row_layout.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">

<TextView
    android:id="@+id/txtRestroName"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="@color/Darkorange"
    android:textSize="22sp"
    android:textStyle="bold" />

<TextView
    android:id="@+id/txtRastroType"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/txtRestroName"
    android:textColor="@color/whiteColor"
    android:textSize="18sp"
    />

<Button
    android:id="@+id/viewdetails"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_below="@+id/txtRestroRating"
    android:background="@drawable/detail_button"
    android:text="View Details"
    android:textColor="@color/whiteColor"
    android:textSize="18sp"
    android:textStyle="bold" />

<TextView
    android:id="@+id/txtRestroRating"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:textColor="@color/whiteColor"
    android:textSize="18sp" />

<View
    android:id="@+id/line1"
    android:layout_width="match_parent"
    android:layout_height="2dp"
    android:layout_below="@+id/viewdetails"
    android:layout_marginTop="5dp"
    android:background="@color/whiteColor" />

</RelativeLayout>

4) CustomFavRestroAdapter.java

public class CustomFavRestroAdapter extends ArrayAdapter<FavEntityList> {

Context context;
LayoutInflater inflater;
List<FavEntityList> favRestroList;
private SparseBooleanArray mSelectedItemsIds;

public CustomFavRestroAdapter(Context context, int resourceId,
                       List<FavEntityList> favRestroList) {
    super(context, resourceId, favRestroList);
    mSelectedItemsIds = new SparseBooleanArray();
    this.context = context;
    this.favRestroList = favRestroList;
    inflater = LayoutInflater.from(context);
}

private class ViewHolder {
    TextView restroname;
    TextView restrotype;
    TextView restroratings;
}

public View getView(int position, View view, ViewGroup parent) {
    final ViewHolder holder;
    if (view == null) {
        holder = new ViewHolder();
        view = inflater.inflate(R.layout.list_row_layout, null);
        // Locate the TextViews in listview_item.xml
        holder.restroname = (TextView) view.findViewById(R.id.txtRestroName);
        holder.restrotype = (TextView) view.findViewById(R.id.txtRastroType);
        holder.restroratings = (TextView) view.findViewById(R.id.txtRestroRating);
        // Locate the ImageView in listview_item.xml

        view.setTag(holder);
    } else {
        holder = (ViewHolder) view.getTag();
    }
    // Capture position and set to the TextViews
    holder.restroname.setText(favRestroList.get(position).getRestaurantName());
    holder.restrotype.setText(favRestroList.get(position).getRestaurantType());
    holder.restroratings.setText(favRestroList.get(position).getRestaurantRating());

    return view;
}

@Override
public void remove(FavEntityList object) {
    favRestroList.remove(object);
    notifyDataSetChanged();
}

public List<FavEntityList> getWorldPopulation() {
    return favRestroList;
}

public void toggleSelection(int position) {
    selectView(position, !mSelectedItemsIds.get(position));
}

public void removeSelection() {
    mSelectedItemsIds = new SparseBooleanArray();
    notifyDataSetChanged();
}

public void selectView(int position, boolean value) {
    if (value)
        mSelectedItemsIds.put(position, value);
    else
        mSelectedItemsIds.delete(position);
    notifyDataSetChanged();
}

public int getSelectedCount() {
    return mSelectedItemsIds.size();
}

public SparseBooleanArray getSelectedIds() {
    return mSelectedItemsIds;
}
}

5) MainActivity.java

public class MainActivity extends Activity {

ListView list1;
CustomFavRestroAdapter listviewadapter;
List<FavEntityList> favrestro = new ArrayList<FavEntityList>();

 String[] Restaurant_Names={"Paasha-JW Mariott Pune","RainForest","SubWay","KFC","Domino's","Pride Hotel","Blue Star"};
 String[] Restaurant_Type={"Restro Bar","Restaurant (Vegetarian)","Restaurant (Non-Vegetarian)","Restaurant (Non-Vegetarian)","Restaurant (Vegetarian)","Restaurant (Vegetarian)","Restro Bar"};
 String[] Restaurant_Rating={"Ratings 5.0","Ratings 4.8","Ratings 4.6","Ratings 4.0","Ratings 3.7","Ratings 3.5","Ratings 3.4"};

@Override
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    for (int i = 0; i < Restaurant_Names.length; i++) {
        FavEntityList favrestros = new FavEntityList(Restaurant_Names[i], Restaurant_Type[i], Restaurant_Rating[i]);
        favrestro.add(favrestros);
    }

     list1 = (ListView) findViewById(R.id.list_view);
     listviewadapter = new CustomFavRestroAdapter(this, R.layout.list_row_layout, favrestro);
      list1.setAdapter(listviewadapter);
    list1.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
    list1.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
        @Override
        public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
            final int checkedCount = list1.getCheckedItemCount();
            // Set the CAB title according to total checked items
            mode.setTitle(checkedCount + " Selected");
            // Calls toggleSelection method from ListViewAdapter Class
            listviewadapter.toggleSelection(position);
        }

        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            mode.getMenuInflater().inflate(R.menu.contextual_menu, menu);
            return true;
        }

         @Override
         public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            return false;
         }

         @Override
         public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            switch (item.getItemId()) {
                case R.id.item_delete:
                    // Calls getSelectedIds method from ListViewAdapter Class
                    SparseBooleanArray selected = listviewadapter
                            .getSelectedIds();
                    // Captures all selected ids with a loop
                    for (int i = (selected.size() - 1); i >= 0; i--) {
                        if (selected.valueAt(i)) {
                            FavEntityList selecteditem = listviewadapter
                                    .getItem(selected.keyAt(i));
                            // Remove selected items following the ids
                            listviewadapter.remove(selecteditem);
                        }
                    }
                    // Close CAB
                    mode.finish();
                    return true;
                default:
                    return false;
            }
        }

        @Override
        public void onDestroyActionMode(ActionMode mode) {
            listviewadapter.removeSelection();
        }
    });


 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}
}

我尝试了很多答案1） 在带有上下文操作栏的自定义列表视图上选择了项目

2） 上下文动作栏

感谢您的任何继承

Answer 1

在您的list_row_layout.xml中添加以下行

   android:descendantFocusability="blocksDescendants"

由于行中有一个按钮，因此LongClick不会触发，因此需要添加以上行。

还添加

   list1.setOnItemLongClickListener(this).

ActionBar侦听器

 @Override
  public boolean onCreateActionMode(ActionMode mode, Menu menu) {

    MenuInflater inflater = mode.getMenuInflater();
    inflater.inflate(R.menu.contextual_menu.xml, menu);
    return true;
  }

 @Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
    return true;
}

Answer 2

终于解决了问题

由于存在Button，因此未执行OnItemLongClick，因此

我只是删除了按钮，然后将“查看详细信息”的图像放在了其中。

感谢@Lochana Ragupathy :)