在长时间按住 ListView 条目并显示各种选项后，我试图打开上下文菜单。 但是，只要按住不执行/调用任何操作，我就无法执行。

这是我用来调用上下文菜单的代码:

@Override
public void onCreateContextMenu(ContextMenu menu, View v,
        ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);

    MenuItem delete = menu.add("delete");
    MenuItem edit = menu.add("edit");
    delete.setOnMenuItemClickListener(new OnMenuItemClickListener() {
        public boolean onMenuItemClick(MenuItem item) {
            return true;
        }
    });
    edit.setOnMenuItemClickListener(new OnMenuItemClickListener() {
        public boolean onMenuItemClick(MenuItem item) {
            return true;
        }
    });
}

我也试过了，也没用:

@Override
public void onCreateContextMenu(ContextMenu menu, 
                View v, ContextMenuInfo menuInfo) {
    menu.add(0, 1, 0, "Edit");
    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("Edit")) {
        //Edit code
    } else if(item.getTitle().equals("Rename")) {
        //Rename code
    } else if(item.getTitle().equals("Delete")) {
        //Delete code
    }
    return true;
};

MainActivity 代码(仅相关部分):

public class MainActivity extends Activity {
    private List<CountElement> myElements = new ArrayList<CountElement>();
    ListView list;
    ArrayAdapter<CountElement> adapter;

    /*
    Users enters needed listview items, code not shown here. It works fine however - 
    all needed elements are displayed correctly.
    */

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

        adapter = new MyListAdapter();
        list = (ListView) findViewById(R.id.listView1);
        list.setAdapter(adapter);
        registerForContextMenu(list);
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);

        MenuItem delete = menu.add("delete");
        MenuItem edit = menu.add("edit");
        delete.setOnMenuItemClickListener(new OnMenuItemClickListener() {
            public boolean onMenuItemClick(MenuItem item) {
                return true;
            }
        });
        edit.setOnMenuItemClickListener(new OnMenuItemClickListener() {
            public boolean onMenuItemClick(MenuItem item) {
                return true;
            }
        });
    }

    private class MyListAdapter extends ArrayAdapter<CountElement> {
        //Custom adapter code here
    }
}

非常感谢任何帮助。谢谢!

最佳答案

好吧，我想通了。在我的自定义 listAdapter 中，我在 listView 上添加了一个 setOnItemLongClickListener。这个 setOnItemLongClickListener 有一个警报显示我需要的选项。这样:

list.setOnItemLongClickListener(new OnItemLongClickListener() { //list is my listView

            @Override
            public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
                    final int pos, long id) {
            //Whatever you wanna do
            }
 });

关于java - Android:Listview 长按上下文菜单问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25813170/