Java ListView OnItemLongClickListener（）未触发

我有一个扩展ListActivity的类，其中列表项响应OnClick事件。添加OnItemLongClickListener无效。不会调用onItemLongClick（）函数（无日志输出或Toast显示），而是处理正常的OnClick（）事件

我想在长时间单击后显示上下文操作栏。在一个新项目中使用我的代码的最低限度的示例可以很好地工作。所以我的问题是：什么可能阻止触发onItemLongClick（）触发器

我的最低API是11。我还将listView设置为

longClickable=“true”

活动代码（所选功能）：

public class EventListActivity extends ListActivity {

    private ArrayList<Event> arrEvents = null;
    private ArrayAdapter<Event> adpEvents = null;

    private ActionMode mActionMode = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // only create list adapter and set it
        arrEvents = new ArrayList<Event>();
        adpEvents = new ArrayAdapter<Event>(this, android.R.layout.simple_list_item_activated_2, android.R.id.text1, arrEvents) {
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                View view = super.getView(position, convertView, parent);
                TextView text1 = (TextView) view.findViewById(android.R.id.text1);
                TextView text2 = (TextView) view.findViewById(android.R.id.text2);
                text1.setText(arrEvents.get(position).getTitle());
                text2.setText(arrEvents.get(position).getDateTimeFormatted());
                return view;
            }
        };

        setListAdapter(adpEvents);

        // add CAB to ListView
        setupCAB();
    }


    @Override
    protected void onResume() {
        super.onResume();

        // populate list and refresh adapter
        createEventList();
        adpEvents.notifyDataSetChanged();

        // if list empty show emtpy msg, otherwise hide it
        setContentView(R.layout.activity_event_list);
        TextView empty = (TextView) findViewById(R.id.text_empty);
        if(arrEvents.isEmpty()) {
            empty.setVisibility(View.VISIBLE);
        } else {
            empty.setVisibility(View.GONE);
        }
    }


    private void setupCAB() {
        // Important: to select single mode
        getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);

        getListView().setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            // Called when the user long-clicks an item on the list
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View row, int position, long rowid) {
                Log.w("EventListActivity", "Long click detected!");
                Toast.makeText(EventListActivity.this, "Long click detected!", Toast.LENGTH_SHORT).show();
                if (mActionMode != null) {
                    return false;
                }

                // Important: to mark the editing row as activated
                getListView().setItemChecked(position, true);

                // Start the CAB using the ActionMode.Callback defined above
                mActionMode = EventListActivity.this.startActionMode(mActionModeCallback);
                return true;
            }
        });
    }

    private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {
        // Called when the action mode is created; startActionMode() was called
        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            // Inflate a menu resource providing context menu items
            MenuInflater inflater = mode.getMenuInflater();
            inflater.inflate(R.menu.event_context, menu);
            return true;
        }

        // Called when the user enters the action mode
        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            // Disable the list to avoid selecting other elements while editing one
            EventListActivity.this.getListView().setEnabled(false);
            return true; // Return false if nothing is done
        }

        // Called when the user selects a contextual menu item
        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            switch (item.getItemId()) {
            case R.id.mnu_share_event:
                //TODO share event
                mode.finish();
                return true;
            default:
                return false;
            }
        }

        // Called when the user exits the action mode
        @Override
        public void onDestroyActionMode(ActionMode mode) {
            // Re-enable the list after edition
            EventListActivity.this.getListView().setEnabled(true);
            mActionMode = null;
        }
    };

}

<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: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=".EventListActivity" >

    <TextView
        android:id="@+id/text_empty"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="45dp"
        android:text="@string/empty"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:visibility="gone" />

    <ListView
        android:id="@android:id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:longClickable="true" >
    </ListView>

</RelativeLayout>

公共类EventListActivity扩展了ListActivity{
private ArrayList arredents=null；
private ArrayAdapter adpEvents=null；
私有操作模式mActionMode=null；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
//仅创建列表适配器并设置它
arreavents=newarraylist（）；
adpEvents=new ArrayAdapter（这个，android.R.layout.simple\u list\u item\u activated\u 2，android.R.id.text1，ArraEvents）{
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
视图=super.getView（位置、转换视图、父级）；
TextView text1=（TextView）view.findViewById（android.R.id.text1）；
TextView text2=（TextView）view.findViewById（android.R.id.text2）；
text1.setText（arevents.get（position.getTitle（））；
text2.setText（arevents.get（position.getDateTimeFormatted（））；
返回视图；
}
};
setListAdapter（adpEvents）；
//将CAB添加到ListView
setupCAB（）；
}
@凌驾
受保护的void onResume（）{
super.onResume（）；
//填充列表并刷新适配器
createEventList（）；
adpEvents.notifyDataSetChanged（）；
//如果列表为空，则显示emtpy消息，否则将其隐藏
setContentView（R.layout.activity\u event\u list）；
TextView empty=（TextView）findViewById（R.id.text\u empty）；
if（arreavents.isEmpty（））{
empty.setVisibility（View.VISIBLE）；
}否则{
empty.setVisibility（View.GONE）；
}
}
私有void setupCAB（）{
//重要事项：选择单一模式
getListView（）.setChoiceMode（ListView.CHOICE\u MODE\u SINGLE）；
getListView（）.setOnItemLongClickListener（新的AdapterView.OnItemLongClickListener（））{
//当用户长时间单击列表中的项目时调用
@凌驾
公共布尔值长单击（AdapterView父项、视图行、整型位置、长rowid）{
w（“EventListActivity”，“检测到长时间单击！”）；
Toast.makeText（EventListActivity.this，“长点击检测！”，Toast.LENGTH\u SHORT.show（）；
if（mActionMode！=null）{
返回false；
}
//要点：将编辑行标记为已激活
getListView（）.setItemChecked（位置，true）；
//使用上面定义的ActionMode.Callback启动CAB
mActionMode=EventListActivity.this.startActionMode（mActionModeCallback）；
返回true；
}
});
}
private ActionMode.Callback mActionModeCallback=new ActionMode.Callback（）{
//创建操作模式时调用；调用startActionMode（）
@凌驾
公共布尔onCreateActionMode（ActionMode模式，菜单）{
//为提供上下文菜单项的菜单资源充气
MenuInflater充气器=模式。getMenuInflater（）；
充气器。充气（右菜单。事件上下文，菜单）；
返回true；
}
//当用户进入操作模式时调用
@凌驾
公共布尔onPrepareActionMode（操作模式，菜单）{
//禁用该列表以避免在编辑一个元素时选择其他元素
EventListActivity.this.getListView（）.setEnabled（false）；
return true；//如果不执行任何操作，则返回false
}
//当用户选择上下文菜单项时调用
@凌驾
公共布尔值onActionItemClicked（ActionMode模式，菜单项）{
开关（item.getItemId（））{
案例R.id.mnu\U共享\U事件：
//待办事项分享活动
mode.finish（）；
返回true；
违约：
返回false；
}
}
//当用户退出操作模式时调用
@凌驾
公共void onDestroyActionMode（ActionMode模式）{
//编辑后重新启用列表
EventListActivity.this.getListView（）.setEnabled（true）；
mActionMode=null；
}
};
}

activity\u event\u list.xml:

public class EventListActivity extends ListActivity {

    private ArrayList<Event> arrEvents = null;
    private ArrayAdapter<Event> adpEvents = null;

    private ActionMode mActionMode = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // only create list adapter and set it
        arrEvents = new ArrayList<Event>();
        adpEvents = new ArrayAdapter<Event>(this, android.R.layout.simple_list_item_activated_2, android.R.id.text1, arrEvents) {
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                View view = super.getView(position, convertView, parent);
                TextView text1 = (TextView) view.findViewById(android.R.id.text1);
                TextView text2 = (TextView) view.findViewById(android.R.id.text2);
                text1.setText(arrEvents.get(position).getTitle());
                text2.setText(arrEvents.get(position).getDateTimeFormatted());
                return view;
            }
        };

        setListAdapter(adpEvents);

        // add CAB to ListView
        setupCAB();
    }


    @Override
    protected void onResume() {
        super.onResume();

        // populate list and refresh adapter
        createEventList();
        adpEvents.notifyDataSetChanged();

        // if list empty show emtpy msg, otherwise hide it
        setContentView(R.layout.activity_event_list);
        TextView empty = (TextView) findViewById(R.id.text_empty);
        if(arrEvents.isEmpty()) {
            empty.setVisibility(View.VISIBLE);
        } else {
            empty.setVisibility(View.GONE);
        }
    }


    private void setupCAB() {
        // Important: to select single mode
        getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);

        getListView().setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            // Called when the user long-clicks an item on the list
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View row, int position, long rowid) {
                Log.w("EventListActivity", "Long click detected!");
                Toast.makeText(EventListActivity.this, "Long click detected!", Toast.LENGTH_SHORT).show();
                if (mActionMode != null) {
                    return false;
                }

                // Important: to mark the editing row as activated
                getListView().setItemChecked(position, true);

                // Start the CAB using the ActionMode.Callback defined above
                mActionMode = EventListActivity.this.startActionMode(mActionModeCallback);
                return true;
            }
        });
    }

    private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {
        // Called when the action mode is created; startActionMode() was called
        @Override
        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
            // Inflate a menu resource providing context menu items
            MenuInflater inflater = mode.getMenuInflater();
            inflater.inflate(R.menu.event_context, menu);
            return true;
        }

        // Called when the user enters the action mode
        @Override
        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
            // Disable the list to avoid selecting other elements while editing one
            EventListActivity.this.getListView().setEnabled(false);
            return true; // Return false if nothing is done
        }

        // Called when the user selects a contextual menu item
        @Override
        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
            switch (item.getItemId()) {
            case R.id.mnu_share_event:
                //TODO share event
                mode.finish();
                return true;
            default:
                return false;
            }
        }

        // Called when the user exits the action mode
        @Override
        public void onDestroyActionMode(ActionMode mode) {
            // Re-enable the list after edition
            EventListActivity.this.getListView().setEnabled(true);
            mActionMode = null;
        }
    };

}

<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: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=".EventListActivity" >

    <TextView
        android:id="@+id/text_empty"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="45dp"
        android:text="@string/empty"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:visibility="gone" />

    <ListView
        android:id="@android:id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:longClickable="true" >
    </ListView>

</RelativeLayout>

---

如果在listview中有响应

onClick（）

事件的按钮，则需要在保存这些按钮的容器中设置以下内容：

android:descendantFocusability="blocksDescendants"

---

如果您拥有的是文本视图，那么问题就稍微复杂一些。请参见：

当使用ListActivity或ListFragment时，没有方法可以覆盖长时间单击，并且在onCreateView（）中无法访问ListView，因为它由父类控制

因此，为了克服这个问题，我做了以下工作，因为getListView（）命令在创建视图之前不起作用：

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    mRecipeListView = this.getListView();
    mRecipeListView.setOnItemLongClickListener(new ListView.OnItemLongClickListener() {

        @Override
        public boolean onItemLongClick(AdapterView<?> arg0, View view, int position, long row_id) {
            // Process the long-click
        }
    });
}

@覆盖
已创建视图上的公共void（视图，捆绑保存状态）{
super.onViewCreated（视图，savedInstanceState）；
mRecipeListView=this.getListView（）；
mRecipeListView.setOnItemLongClickListener（新的ListView.OnItemLongClickListener（）{
@凌驾
公共布尔值长单击（AdapterView arg0，视图，int p
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position,
        long rowId) {

    Log.i("Chimee", "Long click working");
    return false;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    View v = inflater.inflate(R.layout.my_fragment, container, false);

    lvSuggestions = (ListView) v.findViewById(R.id.lvSuggestions);
    lvSuggestions.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
    lvSuggestions.setOnItemClickListener(this);
    lvSuggestions.setOnItemLongClickListener(this); // Forgot this

    ...
}