将 onlongclick 侦听器添加到警报对话框答案

【问题标题】：Add onlongclick listener to an alertdialog将 onlongclick 侦听器添加到警报对话框
【发布时间】：2023-04-07 23:24:01
【问题描述】：

我在 android 中有一个 AlertDialog，其中包含来自 sqlite 的好友列表。当我单击列表中的好友名称时，会调用该好友。我想要做的是将一个 longclicklistener 添加到列表中，以便提示我删除列表中的好友。我无法让 onlclick 和 onlongclick 在同一个元素上工作。有人可以在这里给我一个指针。我已经使用 android 工作了几个月。感谢您的帮助！

private void displayBuddyList(String region) {
        final String region2 = region;
        Context context = getApplicationContext();
        dh = new DataBaseHelper(context);

        List<String> bnames = dh.selectBuddies(); 
        Log.d(TAG, "Buddy Names: " +bnames);



    final CharSequence[] buds = bnames.toArray(new CharSequence[bnames.size()]);
//  final CharSequence[] items = {"Mark", "Vikrant", "Olle,"Jane","Dan"};

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Select a Buddy");   
    builder.setItems(buds, new DialogInterface.OnClickListener() {



        public void onClick(DialogInterface dialogInterface, int item) {

        //  showShortToast("Clicked on:"+buddy[item]);
            String ptcode =  buds[item].toString();;




        if (region2 == "A") { 

                callbuddy(ptcode,region2);

            } else if  (region2 == "E") {

                        callbuddy(ptcode,region2);


           } else if  (region2 == "P") {

                        callbuddy(ptcode,region2);



            } else {
                 showShortToast("We have a bug"); 
            }

           return;
        }
    });
    builder.create().show();
}

【问题讨论】：

标签： android onlongclicklistener

【解决方案1】：

添加 OnLongClickListener 的一种方法是覆盖对话框的 OnShowListener 并在 onShow(DialogInterface dialog) 方法中设置 OnItemLongClickListener。试试这个：

private void displayBuddyList(String region) {
    final String region2 = region;
    Context context = getApplicationContext();
    dh = new DataBaseHelper(context);
    List<String> bnames = dh.selectBuddies(); 
    Log.d(TAG, "Buddy Names: " +bnames);

final CharSequence[] buds = bnames.toArray(new CharSequence[bnames.size()]);
//  final CharSequence[] items = {"Mark", "Vikrant", "Olle,"Jane","Dan"};

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select a Buddy");   
builder.setItems(buds, new DialogInterface.OnClickListener() 
{
    public void onClick(DialogInterface dialogInterface, int item) {
    //  showShortToast("Clicked on:"+buddy[item]);
        String ptcode =  buds[item].toString();;
    if (region2 == "A") { 
            callbuddy(ptcode,region2);
        } else if  (region2 == "E") {
                    callbuddy(ptcode,region2);
       } else if  (region2 == "P") {
                    callbuddy(ptcode,region2);
        } else {
             showShortToast("We have a bug"); 
        }
       return;
    }
});

final AlertDialog ad = builder.create(); //don't show dialog yet
ad.setOnShowListener(new OnShowListener() 
{       
    @Override
public void onShow(DialogInterface dialog) 
{       
        ListView lv = ad.getListView(); //this is a ListView with your "buds" in it
        lv.setOnItemLongClickListener(new OnItemLongClickListener() 
    {
    @Override
    public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) 
    {
        Log.d("Long Click!","List Item #"+position+"was long clicked");
        return true;
    }           
    });     
}
});
ad.show();

}

【讨论】：