(Android™) Simple REST Example

Demonstrates a very simple RESTful API call to get a stock time series daily (quotes) from Alpha Vantage.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkRest rest = new CkRest();

    // Connect to the REST server.
    boolean bTls = true;
    int port = 443;
    boolean bAutoReconnect = true;
    boolean success = rest.Connect("www.alphavantage.co",port,bTls,bAutoReconnect);
    if (success != true) {
        Log.i(TAG, rest.lastErrorText());
        return;
        }

    // Get a stock quote:
    // Sending GET request to https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=MSFT&apikey=my_api_key
    success = rest.AddQueryParam("function","TIME_SERIES_DAILY");
    success = rest.AddQueryParam("symbol","AAPL");
    success = rest.AddQueryParam("apikey","my_api_key");
    String responseJson = rest.fullRequestNoBody("GET","/query");
    if (rest.get_LastMethodSuccess() != true) {
        Log.i(TAG, rest.lastErrorText());
        return;
        }

    Log.i(TAG, responseJson);

    // Sample response:
    // {
    //     "Meta Data": {
    //         "1. Information": "Daily Prices (open, high, low, close) and Volumes",
    //         "2. Symbol": "AAPL",
    //         "3. Last Refreshed": "2019-12-06",
    //         "4. Output Size": "Compact",
    //         "5. Time Zone": "US/Eastern"
    //     },
    //     "Time Series (Daily)": {
    //         "2019-12-06": {
    //             "1. open": "267.4800",
    //             "2. high": "271.0000",
    //             "3. low": "267.3000",
    //             "4. close": "270.7100",
    //             "5. volume": "25447644"
    //         },
    //         "2019-12-05": {
    //             "1. open": "263.7900",
    //             "2. high": "265.8900",
    //             "3. low": "262.7300",
    //             "4. close": "265.5800",
    //             "5. volume": "18661343"
    //         },
    //         "2019-12-04": {
    //             "1. open": "261.0700",
    //             "2. high": "263.3100",
    //             "3. low": "260.6800",
    //             "4. close": "261.7400",
    //             "5. volume": "16810388"
    //         },
    // ...
    //         "2019-07-18": {
    //             "1. open": "204.0000",
    //             "2. high": "205.8800",
    //             "3. low": "203.7000",
    //             "4. close": "205.6600",
    //             "5. volume": "18582161"
    //         }
    //     }
    // }

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}