Android列表项长按时未显示上下文菜单

Posted 2023-02-27

【中文标题】Android列表项长按时未显示上下文菜单

【英文标题】：Context menu is not showing on Android list item long press

【发布时间】：2013-12-05 09:39:32

【问题描述】：

我被我添加的列表视图上的长按卡住了

registerForContextMenu(this.objListView);

关于 on create 方法。我的 onCreateContextMenu 如下

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) 
    super.onCreateContextMenu(menu, v, menuInfo);
    System.out.println("ENTERED IN THE CONTEXT MENU BLOCK");
    if (v.getId() == R.id.booksLV) 
        AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) menuInfo;
        String objBook = userVector.get(info.position);
        menu.setHeaderTitle(objBook);
        String[] menuItems = "Edit","Delete" ;
        for (int i = 0; i < menuItems.length; i++) 
            menu.add(Menu.NONE, i, i, menuItems[i]);
        
    


 <ListView
            android:id="@+id/booksLV"
            android:layout_
            android:layout_
            android:layout_weight="0.5"

            android:dividerHeight="1px"
            android:paddingRight="1dip"
             >
        </ListView>

自定义适配器组件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/listitem_test"
    android:layout_
    android:layout_
    android:clickable="true"
    android:focusable="true"
    android:gravity="center_vertical"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/nameLL"
        android:layout_
        android:layout_
        android:background="@color/pure_white_color"
        android:clickable="true"
        android:focusable="true"
        android:orientation="horizontal"
        android:padding="10dip" >

        <TextView
            android:id="@+id/nameTV"
            android:layout_
            android:layout_
            android:text="@+id/TextView01" 
            android:textAppearance="?android:attr/textAppearanceSmall">
        </TextView>
    </LinearLayout>

    <LinearLayout
        android:id="@+id/headingLL"
        android:layout_
        android:layout_
        android:background="@color/off_white_color" >

        <TextView
            android:id="@+id/headingTV"
            android:layout_
            android:layout_
            android:paddingLeft="5dip"
            android:text="@+id/TextView01" 
              android:textColor="@color/darkGray"
               android:textAppearance="?android:attr/textAppearanceSmall">
        </TextView>
    </LinearLayout>

</LinearLayout>

创建

public void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        this.savedInstanceState = savedInstanceState;
        Display display = getWindowManager().getDefaultDisplay();
        Point size = new Point();
        display.getSize(size);
        int width = size.x;
        int height = size.y;
        System.out.println(width + " ++++++++++++++++++++ " + height);
        Toast.makeText(this, width + " " + height, Toast.LENGTH_LONG).show();
        if (width == 240 && height == 400) 
            setContentView(R.layout.activity_flat_accountlist_exp_h);
         else if (width == 480 && height == 856) 
            setContentView(R.layout.activity_flat_accountlist_exp_h);
         else if (width == 480 && height == 854) 
            setContentView(R.layout.activity_flat_accountlist_exp_h);
         else if (width == 600 && height == 976) 
            setContentView(R.layout.activity_flat_accountlist_exp_mdpi_h);
         else if (width == 600 && height == 1024) 
            setContentView(R.layout.activity_flat_accountlist_exp_mdpi_h);
         else 
            setContentView(R.layout.activity_flat_accountlist);
        

        float scale = this.getResources().getDisplayMetrics().density;
        mSearchView = (SearchView) findViewById(R.id.searchView);

        objListView = (ListView) findViewById(R.id.booksLV);

        registerForContextMenu(objListView);

        selectedIndex = (TextView) findViewById(R.id.selectedIndex);


        showProcessDialog();
        getAccounts();



    

长按不显示上下文菜单

请帮帮我

谢谢

【问题讨论】：

长按不显示上下文菜单

@Amith R.id.booksLV 是列表视图 ID 吗？

你能贴出你的list item的xml代码吗？

看看***.com/questions/3972945/…

@ Tamilan @ Abhishek V 我已经更新了问题请看

【参考方案1】：

在 Listview 上尝试以下代码以获取上下文菜单。

首先在 listview 上注册您的内容菜单..

ListView mListView = (ListView)findViewById(R.id.listview);
registerForContextMenu(mListView);

在内容菜单上添加菜单...

@Override
    public void onCreateContextMenu(ContextMenu menu, 
                    View v, ContextMenuInfo menuInfo) 
        menu.add(0, 1, 0, "Add");
        menu.add(0, 2, 1, "Rename");
        menu.add(0, 3, 2, "Delete");
        super.onCreateContextMenu(menu, v, menuInfo);
    

    @Override
    public boolean onContextItemSelected(MenuItem item) 
        super.onContextItemSelected(item);

        if(item.getTitle().equals("Add")) 
            //Add code
         else if(item.getTitle().equals("Rename")) 
            //Rename code
         else if(item.getTitle().equals("Delete")) 
            //Delete code
        
        return true;
    ;

【讨论】：

我正在使用自定义适配器

自定义适配器有什么用？ ContextMenu 还是 ListView？？

【参考方案2】：

您必须在 onCreate 方法中将 longclicklistener 添加到您的视图中

this.objListView.setOnLongClickListener(new OnLongClickListener()  
    @Override
    public boolean onLongClick(View v) 
        // Here open the context menu
        openContextMenu(this.objListView);
    
);

希望对你有帮助

【参考方案3】：

你的 onCreateContextMenu() 方法被调用了吗？

如果是，您是否尝试在添加项目后调用超级：

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) 

    System.out.println("ENTERED IN THE CONTEXT MENU BLOCK");
    if (v.getId() == R.id.booksLV) 
    
        AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) menuInfo;
        String objBook = userVector.get(info.position);
        menu.setHeaderTitle(objBook);
        String[] menuItems = "Edit","Delete" ;
        for (int i = 0; i < menuItems.length; i++) 
            menu.add(Menu.NONE, i, i, menuItems[i]);
        

    
    super.onCreateContextMenu(menu, v, menuInfo);