Android HttpURLConnection + JSON 解析天氣數據：完整示例

需求

請求 `https://wthrcdn.etouch.cn/weather_mini?citykey=101010100`，解析 JSON 顯示天氣。

核心代碼

// 網絡請求 (需在子線程)
String urlStr = "https://wthrcdn.etouch.cn/weather_mini?citykey=101010100";
URL url = new URL(urlStr);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(5000);
conn.setReadTimeout(5000);
InputStream is = conn.getInputStream();
String json = new BufferedReader(new InputStreamReader(is)).lines().collect(Collectors.joining());

// JSON 解析 (org.json)
JSONObject root = new JSONObject(json);
int status = root.getInt("status");
if (status == 1000) {
    JSONObject data = root.getJSONObject("data");
    String city = data.getString("city");
    JSONArray forecast = data.getJSONArray("forecast");
    for (int i=0; i