Question

我有一个OnClickListener打开一个带有listview的对话框和一个取消按钮，取消按钮自然地关闭对话框，但是我也想在点击listview上的一个项目并完成一些任务后关闭对话框，但是我无法弄清楚如何，这是我的代码：

View.OnClickListener clickListener = new View.OnClickListener()
{
    TextView textView;

    @Override
    public void onClick(View view)
    {
        textView = (TextView) view;
        final AlertDialog.Builder alertDialog = new AlertDialog.Builder(AttendanceStatsActivity.this);
        LayoutInflater inflater = getLayoutInflater();
        View convertView = inflater.inflate(R.layout.list_dialog, null);
        alertDialog.setView(convertView);
        alertDialog.setTitle("Сурагчид");

        alertDialog.setNegativeButton("Хаах", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                dialog.dismiss();
            }
        });

        ListView lv = (ListView) convertView.findViewById(R.id.lv);
        ArrayAdapter<String> adapter = new ArrayAdapter<>(getApplicationContext(), R.layout.my_spinner_dropdown_item,
                studentNames);
        lv.setAdapter(adapter);
        lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
        {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l)
            {
                String fullName = studentNames.get(i);
                textView.setText(fullName);
            }
        });
        alertDialog.show();
    }
};

我无法简单地调用dialog.dismiss（），因为它在onItemclick（）中无法识别

Answer 1

您需要将show方法放在onItemClickListener：

之前

final AlertDialog dialog =    alertDialog.show();
lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
    {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int i, long l)
        {
            String fullName = studentNames.get(i);
            textView.setText(fullName);
            dialog.dismiss();
        }
    });

Answer 2

您需要先声明dialog变量。

//... above code
alertDialog.setTitle("Сурагчид");
// Get dialog here.
AlertDialog dialog = alertDialog.create();

// Now you can use 
 lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
 {
      @Override
      public void onItemClick(AdapterView<?> adapterView, View view, int i, long l)
      {
         //Use it here. It is ok now
         dialog.dismiss();
       }
 });

Answer 3

试试这个：

如果您的任务已完成，请将alertDialog.dismiss()放在lv.setOnItemClickListener中并删除dialog.dismiss（）;来自alertDialog.setNegativeButton。

如何使用列表视图关闭对话框

3 个答案: