Question

嗨，我正尝试将JSON响应打印为可读形式，然后将其设置为Textview。这是我尝试打印JSON响应的代码。

 StringRequest stringRequest = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                try {
                    Log.d("json", response);
                    //Creating JsonObject from response String
                    JSONObject jsonObject = new JSONObject(response);
                    //extracting json array from response string
                    JSONArray jsonArray = jsonObject.getJSONArray("data");
                    JSONObject jsonRow = jsonArray.getJSONObject(0);
                    //get value from jsonRow
                    leaderboardView.setText(jsonArray.toString());

它确实以JSON格式打印JSON。这是我正在接收的JSON格式。

{"data":[{"username":"DolanF","score":"4220","rank":"1"},{"username":"reyay","score":"3760","rank":"2"},{"username":"MeghanG","score":"2570","rank":"3"},{"username":"PrimGosling","score":"1360","rank":"4"},{"username":"JakubRozanski","score":"1190","rank":"5"},{"username":"rodyquigley","score":"1120","rank":"6"},{"username":"Kaz835","score":"800","rank":"7"},{"username":"bailey","score":"570","rank":"8"},{"username":"Ellis","score":"430","rank":"9"},{"username":"Joel","score":"390","rank":"10"}]}

我的目标是使用户名，排名和分数打印以可读的格式彼此相邻。

Answer 1

更改：

jsonArray.toString()

进入：

jsonArray.toString(4)

参数（例如4-与上面类似）是每个嵌套级别缩进的空格数。

您可以期望以下输出：

这里有一个Kotlin示例，如何将所有数据作为变量：

fun readJson() {
    val response =
        "{\"data\":[{\"username\":\"DolanF\",\"score\":\"4220\",\"rank\":\"1\"},{\"username\":\"reyay\",\"score\":\"3760\",\"rank\":\"2\"},{\"username\":\"MeghanG\",\"score\":\"2570\",\"rank\":\"3\"},{\"username\":\"PrimGosling\",\"score\":\"1360\",\"rank\":\"4\"},{\"username\":\"JakubRozanski\",\"score\":\"1190\",\"rank\":\"5\"},{\"username\":\"rodyquigley\",\"score\":\"1120\",\"rank\":\"6\"},{\"username\":\"Kaz835\",\"score\":\"800\",\"rank\":\"7\"},{\"username\":\"bailey\",\"score\":\"570\",\"rank\":\"8\"},{\"username\":\"Ellis\",\"score\":\"430\",\"rank\":\"9\"},{\"username\":\"Joel\",\"score\":\"390\",\"rank\":\"10\"}]} \n" +
                "\n"

    val jsonObject = JSONObject(response)

    val jsonArray = jsonObject.getJSONArray("data")

    var output = ""
    for (position in 0 until jsonArray.length()) {
        val row = jsonArray.getJSONObject(position)

        val name = row.getString("username")
        val score = row.getString("score")
        val rank = row.getInt("rank")

        output += String.format("%s - %s (rank: %s)\n", name, score, rank)
    }

    text_view.text = output
}

或使用Java：

void readJson() {
    String response =
            "{\"data\":[{\"username\":\"DolanF\",\"score\":\"4220\",\"rank\":\"1\"},{\"username\":\"reyay\",\"score\":\"3760\",\"rank\":\"2\"},{\"username\":\"MeghanG\",\"score\":\"2570\",\"rank\":\"3\"},{\"username\":\"PrimGosling\",\"score\":\"1360\",\"rank\":\"4\"},{\"username\":\"JakubRozanski\",\"score\":\"1190\",\"rank\":\"5\"},{\"username\":\"rodyquigley\",\"score\":\"1120\",\"rank\":\"6\"},{\"username\":\"Kaz835\",\"score\":\"800\",\"rank\":\"7\"},{\"username\":\"bailey\",\"score\":\"570\",\"rank\":\"8\"},{\"username\":\"Ellis\",\"score\":\"430\",\"rank\":\"9\"},{\"username\":\"Joel\",\"score\":\"390\",\"rank\":\"10\"}]} \n" +
                    "\n";

    try {
        JSONObject jsonObject = new JSONObject(response);

        JSONArray jsonArray = jsonObject.getJSONArray("data");

        StringBuilder output = new StringBuilder();

        for (int position = 0; position < jsonArray.length(); position++) {
            JSONObject row = jsonArray.getJSONObject(position);

            String name = row.getString("username");
            String score = row.getString("score");
            int rank = row.getInt("rank");

            output.append(String.format("%s - %s (rank: %s)\n", name, score, rank));
        }

        text_views.setText(output.toString());

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

输出为：

Android Studio打印JSON响应

1 个答案: