Android使用Google Finance API的网络服务

Question

我是 android 的新手，我真的很困惑如何通过 android 进行谷歌金融 api。谁能给我推荐一些关于它的好文章？以及如何通过 android 使用网络服务。 谢谢

Answer 1

金融 API 网址：“http://www.gummy-stuff.org/Yahoo-data。嗯”

 private static String convertStreamToString(InputStream is) {
/*
 * To convert the InputStream to String we use the
 * BufferedReader.readLine() method. We iterate until the BufferedReader
 * return null which means there's no more data to read. Each line will
 * appended to a StringBuilder and returned as String.
 */
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();

String line = null;
try {
    while ((line = reader.readLine()) != null) {
        sb.append(line + "\n");
    }
} catch (IOException e) {
    e.printStackTrace();
} finally {
    try {
        is.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}
return sb.toString();
}

/*
 * This is a test function which will connects to a given rest service and
* prints it's response to Android Log with labels "Praeda".
 */
public static String[] connect(String url) {
HttpClient httpclient = new DefaultHttpClient();
String[] str = new String[5];

// Prepare a request object
HttpGet httpget = new HttpGet(url);

// Execute the request
HttpResponse response;
try {
    response = httpclient.execute(httpget);
    // Examine the response status
    Log.d(TAG, response.getStatusLine().toString());

    // Get hold of the response entity
    HttpEntity entity = response.getEntity();
    // If the response does not enclose an entity, there is no need
    // to worry about connection release

    if (entity != null) {

        // A Simple JSON Response Read
        InputStream instream = entity.getContent();
        String result = convertStreamToString(instream);
        result=result.replace("parseExchangeRate(", "").replace(");", "");
        Log.d(TAG, result);

        // A Simple JSONObject Creation
        JSONObject json = new JSONObject(result);
        Log.d(TAG, "<jsonobject>\n" + json.toString()
                + "\n</jsonobject>");

        // A Simple JSONObject Parsing
        // JSONArray nameArray=json.names();
        // Log.i("query",nameArray.toString());
        // JSONObject query=json.getJSONObject("query");
        // Log.i("query",query.toString());
        // JSONArray results=query.getJSONArray("results");
        // Log.i("rslts",results.toString());
        // JSONArray quote=results.getJSONArray("quote");
        // JSONObject quote=results.getJSONObject("quote");
        // Log.i("quote",quote.toString());
        JSONObject query = json.getJSONObject("query");
        Log.d(TAG, query.toString());
        JSONObject results = query.getJSONObject("results");
        Log.d(TAG, results.toString());
        JSONObject quote = results.getJSONObject("row");
        Log.d(TAG, quote.toString());
        for (int i = 0; i < quote.length(); i++) {

            // Log.i("Praedafor","<jsonname"+i+">\n"+nameArray.getString(i)+"\n</jsonname"+i+">\n"
            // +"<jsonvalue"+i+">\n"+valArray.getString(i)+"\n</jsonvalue"+i+">");
            // JSONObject quotes = results.getJSONObject(i)
            // .getJSONObject("quote");
            // Log,i
            // Log.i("name",quote.getString("Name"));
            // Log.i("name","pahunch");
            // Log.i("name",quote.getString("Symbol"));

            // Log.i("name",quote.getString("DaysLow"));

            // Log.i("name",quote.getString("DaysHigh"));

            // Log.i("name",quote.getString("Open"));

            // Log.i("name",quote.getString("PreviousClose"));
            String symbol = quote.getString("rate");
            str[0] = symbol;
            String dayslow = quote.getString("DaysLow");
            str[1]=dayslow;
            // tv1.setText(quote.getString("DaysLow"));
            str[2]= quote.getString("DaysHigh");
            str[3]= quote.getString("Open");
            str[4]= quote.getString("Change");
        }

        // A Simple JSONObject Value Pushing
        // json.put("execution-start-time", "sample value");
        Log.d(TAG, "<jsonobject>\n" + json.toString()
                + "\n</jsonobject>");
        // Log.i("Praeda12",json.get("").toString());

        // Closing the input stream will trigger connection release
        instream.close();
    }

} catch (ClientProtocolException e) {
    Log.d(TAG, "ClientProtocolException");
    e.printStackTrace();
} catch (IOException e) {
    Log.d(TAG, "IOException " + e.getMessage());
    e.printStackTrace();
} catch (JSONException e) {
    Log.d(TAG, "JSONException " + e.getMessage());
    e.getMessage();
}
return str;
}