How to get values ​​for an Android application

Question

I am developing a web service based Android app. How to start a query (server using php and MySQL) based on the click of an element and receiving the result from the Internet. I also want to show some values ​​as a list (list layout). Is there any way to accomplish this?

Answer 1

What you want to do is develop a leisure api that provides data for your Android application. For instance. you have the content that you want to use in your application, then you can write a php script that simply returns this data in a specific format.

. mysite.net/rest/fetchAllLocations.php?maybe_some_parameters

, . json, , :

[{ "ID": 1, "shop_lng": +8,5317153930664, "shop_lat": +52,024803161621, "shop_zipcode": 33602, "shop_city": "", "shop_street": "Arndtstra\u00dfe", "shop_snumber": 3, "shop_name": "\u00fcller", "shop_desc": "Kaufhaus" }]

api :

http://shoqproject.supervisionbielefeld.de/public/gateway/gateway/get-shops-by-city/city/Bielefeld

, , Android. :

public class JsonGrabber{

public static JSONArray receiveData(){  
    String url = "your url";
    String result = "";

    DefaultHttpClient client = new DefaultHttpClient();
    HttpGet method = new HttpGet(url);
    HttpResponse res = null;

    try {
        res = client.execute(method);
    } catch (ClientProtocolException e1) {
        e1.printStackTrace();
    } catch (IOException e1) {
        e1.printStackTrace();
    }

    try{
        InputStream is = res.getEntity().getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"));
         StringBuilder sb = new StringBuilder();
         String line = null;
         while ((line = reader.readLine()) != null) {
                 sb.append(line + "\n");
         }
         is.close();
         result = sb.toString();
    }catch(Exception e){
         Log.e("log_tag", "Error converting result "+e.toString());
    }

    JSONArray jArray = null;

    try{
         jArray = new JSONArray(result);
    }catch(JSONException e){
            Log.e("log_tag", "Error parsing data "+e.toString());
    }

    return jArray;
}
}

, json, :

JSONArray test = (JSONArray) JsonGrabber.receiveData()

try { 
    for(int i=0;i<test.length();i++){
    JSONObject json_data = test.getJSONObject(i);
    int id = json_data.getInt("id");
    }
}

- , . AsyncTask. :

Threading , Android-