Android 显示一个单选列表对话框（还可利用二维数组配对数据）

一、先丢代码，方便“面向搜索引擎编程”的同志们

1. 不考虑 item 和 value 的配对的情况下（很简单的啦）：

   new AlertDialog.Builder(context)
     .setTitle(R.string.title)
     .setSingleChoiceItems(
         R.array.items,    // 显示的每行的内容
         checkedItem,      // 已选中的项（ -1 均不选中）
         (dialog, which) -> {
             checkedItem = which;  // 保存选中的项的在 R.array.items 中所处的位置（从 0 开始）
             dialog.dismiss();
         }
     )
     .setNegativeButton(android.R.string.cancel, null)  // “取消”按钮
     .show();
   

2. item 和 value 配对的情况下（实现中利用了一个二维数组，或许还有更好的方案）：

   // 此例中 Items 和 Values 的内容是按顺序一一对应的
   String[][] keyValuePair = {
       getResources().getStringArray(R.array.items),  // Items
       getResources().getStringArray(R.array.values)  // Values
   };
   
   new AlertDialog.Builder(context)
       .setTitle(R.string.title)
       .setSingleChoiceItems(
           keyValuePair[0],              // 显示的每行的内容
           checkedKeyValuePairPosition,  // 已选中的项的位置（ -1 均不选中）
           (dialog, which) -> {
               checkedKeyValuePairPosition = which;  // 保存选中的项所处的位置（从 0 开始）
               checkedKeyValuePairValue =
                   keyValuePair[1][which];           // 保存选中的项对应的 Value
               dialog.dismiss();
           }
       )
       .setNegativeButton(R.string.cancel, null)     // “取消”按钮
       .show();
   

二、builder 里提供的 setSingleChoiceItems 目前看是有四种，可以按需使用。上方的代码只用了其中一种，使用方式区别不大，靠官方文档的注释应该就足够了。这里略微带过几小段：

        /**
         * Set a list of items to be displayed in the dialog as the content, you will be notified of
         * the selected item via the supplied listener. This should be an array type i.e.
         * R.array.foo The list will have a check mark displayed to the right of the text for the
         * checked item. Clicking on an item in the list will not dismiss the dialog. Clicking on a
         * button will dismiss the dialog.
         *
         * @param itemsId the resource id of an array i.e. R.array.foo
         * @param checkedItem specifies which item is checked. If -1 no items are checked.
         * @param listener notified when an item on the list is clicked. The dialog will not be
         *        dismissed when an item is clicked. It will only be dismissed if clicked on a
         *        button, if no buttons are supplied it's up to the user to dismiss the dialog.
         *
         * @return This Builder object to allow for chaining of calls to set methods
         */
        public Builder setSingleChoiceItems(@ArrayRes int itemsId, int checkedItem,
                final OnClickListener listener)

 
        /**
         * Set a list of items to be displayed in the dialog as the content, you will be notified of
         * the selected item via the supplied listener. The list will have a check mark displayed to
         * the right of the text for the checked item. Clicking on an item in the list will not
         * dismiss the dialog. Clicking on a button will dismiss the dialog.
         *
         * @param cursor the cursor to retrieve the items from.
         * @param checkedItem specifies which item is checked. If -1 no items are checked.
         * @param labelColumn The column name on the cursor containing the string to display in the
         *        label.
         * @param listener notified when an item on the list is clicked. The dialog will not be
         *        dismissed when an item is clicked. It will only be dismissed if clicked on a
         *        button, if no buttons are supplied it's up to the user to dismiss the dialog.
         *
         * @return This Builder object to allow for chaining of calls to set methods
         */
        public Builder setSingleChoiceItems(Cursor cursor, int checkedItem, String labelColumn,
                final OnClickListener listener)

        /**
         * Set a list of items to be displayed in the dialog as the content, you will be notified of
         * the selected item via the supplied listener. The list will have a check mark displayed to
         * the right of the text for the checked item. Clicking on an item in the list will not
         * dismiss the dialog. Clicking on a button will dismiss the dialog.
         *
         * @param items the items to be displayed.
         * @param checkedItem specifies which item is checked. If -1 no items are checked.
         * @param listener notified when an item on the list is clicked. The dialog will not be
         *        dismissed when an item is clicked. It will only be dismissed if clicked on a
         *        button, if no buttons are supplied it's up to the user to dismiss the dialog.
         *
         * @return This Builder object to allow for chaining of calls to set methods
         */
        public Builder setSingleChoiceItems(CharSequence[] items, int checkedItem, final OnClickListener listener) 

        /**
         * Set a list of items to be displayed in the dialog as the content, you will be notified of
         * the selected item via the supplied listener. The list will have a check mark displayed to
         * the right of the text for the checked item. Clicking on an item in the list will not
         * dismiss the dialog. Clicking on a button will dismiss the dialog.
         *
         * @param adapter The {@link ListAdapter} to supply the list of items
         * @param checkedItem specifies which item is checked. If -1 no items are checked.
         * @param listener notified when an item on the list is clicked. The dialog will not be
         *        dismissed when an item is clicked. It will only be dismissed if clicked on a
         *        button, if no buttons are supplied it's up to the user to dismiss the dialog.
         *
         * @return This Builder object to allow for chaining of calls to set methods
         */
        public Builder setSingleChoiceItems(ListAdapter adapter, int checkedItem, final OnClickListener listener) 

三、更多

如果需要多选的话，setMultiChoiceItems 拿来用就行了。