[移动开发]Android 使用Json表情包

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类似这样的格式

public class GetJsonDataUtil {


    public String getJson(Context context, String fileName) {

        StringBuilder stringBuilder = new StringBuilder();
        try {
            AssetManager assetManager = context.getAssets();
            BufferedReader bf = new BufferedReader(new InputStreamReader(
                    assetManager.open(fileName)));
            String line;
            while ((line = bf.readLine()) != null) {
                stringBuilder.append(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return stringBuilder.toString();
    }
}

   List<String> list = new ArrayList<>();
        String JsonData = new GetJsonDataUtil().getJson(this, "emoji.json");//获取assets目录下的json文件数据

        try {
            JSONObject jsonObject = new JSONObject(JsonData);
            Iterator<String> keys = jsonObject.keys();

            while(keys.hasNext()){
                //next()返回的数据是Object型，需要强制转化
                String info = (String)keys.next();
                //输出遍历的每一个元素
                JSONArray jsonArray = jsonObject.optJSONArray(info);

                for (int i = 0; i < jsonArray.length(); i++) {
                    String string = jsonArray.getString(i);
                    list.add(string);
                }
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }

        MyAdapter myAdapter = new MyAdapter(R.layout.item, list);
        RecyclerView rv = findViewById(R.id.rv);
        rv.setLayoutManager(new LinearLayoutManager(MainActivity.this));
        rv.setAdapter(myAdapter);

public class MyAdapter extends BaseQuickAdapter<String, BaseViewHolder> {

    public MyAdapter(int layoutResId, @Nullable List<String> data) {
        super(layoutResId, data);
    }

    @Override
    protected void convert(@NotNull BaseViewHolder baseViewHolder, String s) {
        SpanUtils.with((TextView) baseViewHolder.getView(R.id.tv))
                .append("第一个")
                .setFontSize(20,true)
                .append(s)
                .setFontSize(20+baseViewHolder.getAdapterPosition()%20,true)
                .append("第"+baseViewHolder.getAdapterPosition()+"个")
                .create();
    }
}

类似的json文件引用..

省市区文件

JsonBean

public class JsonBean implements IPickerViewData {


    /**
     * name : 省份
     * city : [{"name":"北京市","area":["东城区","西城区","崇文区","宣武区","朝阳区"]}]
     */

    private String name;
    private List<CityBean> city;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public List<CityBean> getCityList() {
        return city;
    }

    public void setCityList(List<CityBean> city) {
        this.city = city;
    }

    // 实现 IPickerViewData 接口，
    // 这个用来显示在PickerView上面的字符串，
    // PickerView会通过IPickerViewData获取getPickerViewText方法显示出来。
    @Override
    public String getPickerViewText() {
        return this.name;
    }


    public static class CityBean {
        /**
         * name : 城市
         * area : ["东城区","西城区","崇文区","昌平区"]
         */

        private String name;
        private List<String> area;

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public List<String> getArea() {
            return area;
        }

        public void setArea(List<String> area) {
            this.area = area;
        }
    }
}

public ArrayList<JsonBean> parseData(String result) {//Gson 解析
        ArrayList<JsonBean> detail = new ArrayList<>();
        try {
            JSONArray data = new JSONArray(result);
            Gson gson = new Gson();
            for (int i = 0; i < data.length(); i++) {
                JsonBean entity = gson.fromJson(data.optJSONObject(i).toString(), JsonBean.class);
                detail.add(entity);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return detail;
    }

 String JsonData = new GetJsonDataUtil().getJson(this, "province.json");//获取assets目录下的json文件数据

        ArrayList<JsonBean> jsonBean = parseData(JsonData);//用Gson 转成实体

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for (int i = 0; i < jsonBean.size(); i++) {//遍历省份
            ArrayList<String> cityList = new ArrayList<>();//该省的城市列表（第二级）
            ArrayList<ArrayList<String>> province_AreaList = new ArrayList<>();//该省的所有地区列表（第三极）

            for (int c = 0; c < jsonBean.get(i).getCityList().size(); c++) {//遍历该省份的所有城市
                String cityName = jsonBean.get(i).getCityList().get(c).getName();
                cityList.add(cityName);//添加城市
                ArrayList<String> city_AreaList = new ArrayList<>();//该城市的所有地区列表

                //如果无地区数据，建议添加空字符串，防止数据为null 导致三个选项长度不匹配造成崩溃
                /*if (jsonBean.get(i).getCityList().get(c).getArea() == null
                        || jsonBean.get(i).getCityList().get(c).getArea().size() == 0) {
                    city_AreaList.add("");
                } else {
                    city_AreaList.addAll(jsonBean.get(i).getCityList().get(c).getArea());
                }*/
                city_AreaList.addAll(jsonBean.get(i).getCityList().get(c).getArea());
                province_AreaList.add(city_AreaList);//添加该省所有地区数据
            }

            /**
             * 添加城市数据
             */
            options2Items.add(cityList);

            /**
             * 添加地区数据
             */
            options3Items.add(province_AreaList);

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