从onclicklistener访问变量 [英] Accessing variables from onclicklistener

问题描述

所以，我有一个onItemLongClickListener的列表视图，获取一个参数'廉政位置在，里面过去了，我已经有两个按钮的alertDialogBu​​ilder。我还有另一个onclickListener的按钮。我需要从第二个侦听器中访问的位置。反正有没有做到这一点，而不使其成为一个全球性的？

So I have an onItemLongClickListener for a list view that gets a parameter 'int position' passed in. Inside, I have an alertDialogBuilder which has two buttons. I have another onclickListener for the buttons. I need to access the position from inside the second listener. Is there anyway to do this without making it a global?

public boolean onItemLongClick(AdapterView parent, View itemView, int position, long id){

    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(BookFace.this);
    alertDialogBuilder.setTitle("Choose an option.");
    alertDialogBuilder
    .setMessage("What would you like to do?")
    .setCancelable(true)
    .setPositiveButton("Edit", new DialogInterface.OnClickListener(){

        @Override
        public void onClick(DialogInterface dialog, int which) {
            Intent intent = new Intent();
            intent.putExtra("position", position); //Can't access this variable
            intent.setClass(SomeClass.this, EditActivity.class);
            startActivity(intent);
    }

感谢您的帮助。

Thanks for your help.

推荐答案

在Java中，你只有当他们被第一个声明为最后。所以，你可以添加：

In Java, you can access outer variables from an inner class declaration only if they are first declared as final. So you could add:

final int selectedPosition = position;

要你的方法的顶部，并使用该值在你的额外，即

to the top of your method and use that value in your extra, i.e.

intent.putExtra("position", selectedPosition);

这篇关于从onclicklistener访问变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！