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android - 如何在 Android 中实现 Google Places API?

转载 作者:行者123 更新时间:2023-11-29 02:03:00 25 4
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我正在尝试开发一个应用程序,允许用户通过实现 Google Places API 来定位附近的机构。但是,没有关于如何完成此操作的任何综合教程/示例。我已经能够拼凑一些代码,但我仍然不知道如何解析结果并随后将它们显示在我的叠加层上。非常感谢任何帮助。

最佳答案

您是否知道更具体的问题出在哪里(解析结果或放置图钉)?您看到了哪些类型的错误?

有关解析 Places API 结果的教程,请访问: https://developers.google.com/academy/apis/maps/places/autocomplete-android

教程中的以下代码应该可以帮助您开始解析结果。为自动完成和搜索 API 返回的 JSON 相似,但不相同。请务必遵循 https://developers.google.com/places/documentation/#PlaceSearchResults 中的格式.

private static final String LOG_TAG = "ExampleApp";

private static final String PLACES_API_BASE = "https://maps.googleapis.com/maps/api/place";
private static final String TYPE_AUTOCOMPLETE = "/autocomplete";
private static final String OUT_JSON = "/json";

private static final String API_KEY = "YOUR_API_KEY";

private ArrayList<String> autocomplete(String input) {
ArrayList<String> resultList = null;

HttpURLConnection conn = null;
StringBuilder jsonResults = new StringBuilder();
try {
StringBuilder sb = new StringBuilder(PLACES_API_BASE + TYPE_AUTOCOMPLETE + OUT_JSON);
sb.append("?sensor=false&key=" + API_KEY);
sb.append("&components=country:uk");
sb.append("&input=" + URLEncoder.encode(input, "utf8"));

URL url = new URL(sb.toString());
conn = (HttpURLConnection) url.openConnection();
InputStreamReader in = new InputStreamReader(conn.getInputStream());

// Load the results into a StringBuilder
int read;
char[] buff = new char[1024];
while ((read = in.read(buff)) != -1) {
jsonResults.append(buff, 0, read);
}
} catch (MalformedURLException e) {
Log.e(LOG_TAG, "Error processing Places API URL", e);
return resultList;
} catch (IOException e) {
Log.e(LOG_TAG, "Error connecting to Places API", e);
return resultList;
} finally {
if (conn != null) {
conn.disconnect();
}
}

try {
// Create a JSON object hierarchy from the results
JSONObject jsonObj = new JSONObject(jsonResults.toString());
JSONArray predsJsonArray = jsonObj.getJSONArray("predictions");

// Extract the Place descriptions from the results
resultList = new ArrayList<String>(predsJsonArray.length());
for (int i = 0; i < predsJsonArray.length(); i++) {
resultList.add(predsJsonArray.getJSONObject(i).getString("description"));
}
} catch (JSONException e) {
Log.e(LOG_TAG, "Cannot process JSON results", e);
}

return resultList;
}

关于android - 如何在 Android 中实现 Google Places API?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11597915/

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