android - 本 map 片通过android中的本地json

Question

我有一个本地 json，其中包含一些显示在 ListView 中的静态数据。

每个对象都应该有一个图像/ Logo ，该图像/ Logo 也显示在 ListView 中。该图像将在本地并位于可绘制文件夹中。

data/listview类似这个http://wptrafficanalyzer.in/blog/android-itemclicklistener-for-a-listview-with-images-and-text/

在本教程中，所有数据和图像都存储在数组中。我的数据存储在 JSON 中。

那么如何在 JSON 中“引用”图像或图像名称以及在创建 ListView 时如何实际访问图像？

Answer 1

假设您的 drawable 文件夹中有一些图像:

drawable
    image_name_1
    image_name_2
    image_name_3
    image_name_4
    ...

把图片的名字放到json中:

[
    {
        "some_field_1": "some_value_1",
        "some_field_2": "some_value_2",
        "some_field_3": "some_value_3",
        ...
        "image_name": "image_name_1"
    },
    {
        "some_field_1": "some_value_1",
        "some_field_2": "some_value_2",
        "some_field_3": "some_value_3",
        ...
        "image_name": "image_name_2"
    },
    {
        "some_field_1": "some_value_1",
        "some_field_2": "some_value_2",
        "some_field_3": "some_value_3",
        ...
        "image_name": "image_name_3"
    },
    ...
]

从 JSON 中获取名称并加载 drawab 资源:

    JSONArray data; // your JSON
    Context context; // context
    Resources resources = context.getResources();
    for (int i = 0; i < data.length(); i++) {
        // getting some another JSON field

        // get image name from JSON
        String imageName = data.getJSONObject(i).getString("image_name");

        // get resource id by image name
        final int resourceId = resources.getIdentifier(imageName, "drawable", context.getPackageName());

        // get drawable by resource id
        Drawable drawable = resources.getDrawable(resourceId);

        // get bitmap by resource id
        Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), resourceId);
    }

更新

将图片资源id放入HashMap

    ...
    List<HashMap<String,String>> aList = new ArrayList<HashMap<String,String>>();

    JSONArray data; // your JSON
    Context context; // context
    Resources resources = context.getResources();
    for (int i = 0; i < data.length(); i++) {
        HashMap<String, String> hm = new HashMap<String,String>();
        hm.put("txt", "Country : " + countries[i]);
        hm.put("cur","Currency : " + currency[i]);

        // get image name from JSON
        String imageName = data.getJSONObject(i).getString("image_name");
        // get resource id by image name
        final int resourceId = resources.getIdentifier(imageName, "drawable", context.getPackageName());

        hm.put("flag", Integer.toString(resourceId) );
        aList.add(hm);
    }