Android Listview like iphone 联系人列表（列表右侧的字母）

Question

我是安卓开发新手。 我一直在寻找类似于联系人列表的列表视图，即右侧带有字母索引面板的列表。

谢谢。

Answer 1

在 android 中没有类似的东西你必须创建自定义视图。尝试从iphone-uitable-view-in-android 和sideindex-for-android. 我已经使用这两个链接中的代码来创建类似iphone 的列表，旁边有字母。

Answer 2

sideindex-for-android 中的代码比它需要的要复杂。

我像该示例一样创建了 LinearLayout，并为字母添加了 TextView 实例。但后来我让它们可以点击了。

在我的 onClick() 中，我查看它是否是这些视图之一并从中获取文本。

当我加载我的列表时，我在 cursoradapter 中设置了一个字典。 setSelection() 方法从这个字典中获取偏移量。

public static final String alphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";

public Map<String, Integer> getAlphabetOffsets() {

    HashMap<String, Integer> map = new HashMap<>();

    // First initialize the dictionary with all of the letters of the alphabet.
    //
    for (int idx = 0; idx < alphabet.length(); idx++) {
        String aLetter = alphabet.substring(idx, idx+1);
        map.put(aLetter, -1);
    }

    int numFound = cursor.getCount();

    cursor.moveToFirst();

    // Now go through the products' first initials and, when an initial has not been
    // found, set the offset for that letter.
    //
    for (int idx = 0; idx < numFound; idx++) {

        String productName = cursor.getString(cursor.getColumnIndex(DB.PRODUCTS_NAME_COL));

        String current;

        if (productName == null || productName.equals("")) {
            current = "0";
        } else {
            current = productName.substring(0, 1).toUpperCase();
        }

        // By the way, what do we do if a product name does not start with a letter or number?
        //
        // For now, we will ignore it. We are only putting 0-9 and A-Z into the side index.
        //
        if (map.containsKey(current) && map.get(current) < 0)
            map.put(current, idx);

        cursor.moveToNext();
    }

    map.put("0", 0);

    int lastFound = 0;

    /*
    Now we deal with letters in the alphabet for which there are no products.

    We go through the alphabet again. If we do not have an offset for a letter,
    we use the offset for the previous letter.

    For example, say that we do not have products that start with "B" or "D", we
    might see:

            { "9" = 0, "A" = 1, "B" = -1, "C" = 5, "D" = -1, "E" = 10 }

    After this runs, will we have:

            { "9" = 0, "A" = 1, "B" = 1, "C" = 5, "D" = 5, "E" = 10 }

    This is so if we click on B, we see the list starting a "A" and see that
    there are no "B" products.

    */
    for (int idx = 0; idx < alphabet.length(); idx++) {

        String current = alphabet.substring(idx, idx+1);

        if ( map.get(current) < 0 ) {
            map.put(current, lastFound);
        } else {
            lastFound = map.get(current);
        }
        System.out.println("alphabet \"" + current + "\" = " + map.get(current));
    }

    return map;
}

Answer 3

在 android 中没有类似的东西（三星的联系人视图除外）

android 中默认使用listview 和原生联系人列表一样快速滚动