package com.example.Android_Volley;
import android.app.Application;
import android.text.TextUtils;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;
/**
* Created with IntelliJ IDEA.
* User: Sajith
* Date: 9/8/14
* Time: 9:04 PM
* To change this template use File | Settings | File Templates.
*/
public class AppController extends Application {
public static final String TAG = AppController.class.getSimpleName();
private RequestQueue mRequestQueue;
private static AppController mInstance;
@Override
public void onCreate() {
super.onCreate();
mInstance = this;
}
public static synchronized AppController getInstance() {
return mInstance;
}
public RequestQueue getRequestQueue() {
if (mRequestQueue == null) {
mRequestQueue = Volley.newRequestQueue(getApplicationContext());
}
return mRequestQueue;
}
public <T> void addToRequestQueue(Request<T> req, String tag) {
req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
getRequestQueue().add(req);
}
public <T> void addToRequestQueue(Request<T> req) {
req.setTag(TAG);
getRequestQueue().add(req);
}
public void cancelPendingRequests(Object tag) {
if (mRequestQueue != null) {
mRequestQueue.cancelAll(tag);
}
}
}
Then You have to Add this class to your manifest file.So inside the Application tag put the name of class.
<application android:label="@string/app_name"
android:icon="@drawable/ic_launcher"
android:name="com.example.Android_Volley.AppController">
<activity android:name="MyActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
And also make shure add internet permission in to your application.
<uses-permission android:name="android.permission.INTERNET"/>
Then inside main activity i have one button and when i click button it will read json object and show in to textview.I have used this public json call to show demo.(http://time.jsontest.com/) it will return date, time and other parameter inside json object.
date:- String
mili seconds :- Double
time:- String
when button clicked it called to this method.
/**
* Send request
*/
private void makeJsonObjectRequest() {
showpDialog();
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET,
urlJsonObj, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
// Parsing json object response
// response will be a json object
String time = response.getString("time");
Double mili = response.getDouble("milliseconds_since_epoch");
String date = response.getString("date");
jsonResponse = "";
jsonResponse += "Time: " + time + "\n\n";
jsonResponse += "seconds: " + mili + "\n\n";
jsonResponse += "Date: " + date + "\n\n";
txtResponse.setText(jsonResponse);
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
hidepDialog();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
// hide the progress dialog
hidepDialog();
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq);
}
In this method hideDialog and showDialog methods used to add progressDialog.
