I am trying to fetch data from Android to Custom ListView but I am not able to Fetch! Please help
MY JSON:_
{
"College":[
{
"Name":"NITK",
"Logo":"http:\/\/192.168.43.164\\Webapp\\Collegelogos\\nitk.jpg"
},
{
"Name":"IITR",
"Logo":"http:\/\/192.168.43.164\\Webapp\\Collegelogos\\iitr.jpg"
},
{
"Name":"NITT",
"Logo":"http:\/\/192.168.43.164\\Webapp\\Collegelogos\\nitt.jpg"
},
{
"Name":"IITB",
"Logo":"http:\/\/192.168.43.164\\Webapp\\Collegelogos\\iitb.png"
},
{
"Name":"IITG",
"Logo":"http:\/\/192.168.43.164\\Webapp\\Collegelogos\\iitg.png"
},
{
"Name":"IITD",
"Logo":"http:\/\/192.168.43.164\\Webapp\\Collegelogos\\iitd.png"
},
{
"Name":"BITS",
"Logo":"http:\/\/192.168.43.164\\Webapp\\Collegelogos\\bits.png"
}
]
}
CODE:-
public class MainActivity extends AppCompatActivity {
private List<College> listcollege;
//Creating Views
private RecyclerView recyclerView;
private RecyclerView.LayoutManager layoutManager;
private RecyclerView.Adapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Initializing Views
recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
listcollege = new ArrayList<>();
getData();
}
private void getData(){
//Showing a progress dialog
final ProgressDialog loading = ProgressDialog.show(this,"Loading Data", "Please wait...",false,false);
//Creating a json array request
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Config.DATA_URL,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
//Dismissing progress dialog
Toast.makeText(MainActivity.this, "sachin", Toast.LENGTH_SHORT).show();
loading.dismiss();
//calling method to parse json array
parseData(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
});
//Creating request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(jsonArrayRequest);
}
public void parseData(JSONArray array) {
for (int i = 0; i < array.length(); i++) {
College college = new College();
JSONObject json = null;
try {
json = array.getJSONObject(i);
college.setImageUrl(json.getString(Config.TAG_IMAGE_URL));
String s = (json.getString(Config.TAG_NAME));
Toast.makeText(this, s, Toast.LENGTH_SHORT).show();
college.setName(s);
} catch (JSONException e) {
e.printStackTrace();
}
listcollege.add(college);
}
adapter = new CardAdapter(this, listcollege);
recyclerView.setAdapter(adapter);
// adapter.notifyDataSetChanged();
}
}
LOG :- ANDROID MONITOR
07-04 13:02:42.289 16225-16256/com.example.sachin.volleyrecycle I/OpenGLRenderer: Initialized EGL, version 1.4
07-04 13:02:42.289 16225-16256/com.example.sachin.volleyrecycle D/OpenGLRenderer: Swap behavior 1
07-04 13:02:42.289 16225-16256/com.example.sachin.volleyrecycle W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
07-04 13:02:42.289 16225-16256/com.example.sachin.volleyrecycle D/OpenGLRenderer: Swap behavior 0
07-04 13:02:42.702 16225-16225/com.example.sachin.volleyrecycle E/RecyclerView: No adapter attached; skipping layout
07-04 13:02:42.946 16225-16225/com.example.sachin.volleyrecycle W/art: Before Android 4.1, method int android.support.v7.widget.ListViewCompat.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView
1. Initialize your adapter and set it to RecyclerView from onCreate() method.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Initializing Views
recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
listcollege = new ArrayList<>();
adapter = new CardAdapter(this, listcollege);
recyclerView.setAdapter(adapter);
getData();
}
2. Instead of JsonArrayRequest, try using JsonObjectRequest:
//Creating a json object request
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest (Config.DATA_URL,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
//Dismissing progress dialog
Toast.makeText(MainActivity.this, "sachin", Toast.LENGTH_SHORT).show();
loading.dismiss();
// College
JSONArray jsonArrayCollege = response.getJSONArray("College");
// calling method to parse json array
parseData(jsonArrayCollege);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
});
//Creating request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(jsonObjectRequest);
3. Update parseData() method as below:
public void parseData(JSONArray array) {
for (int i = 0; i < array.length(); i++) {
College college = new College();
JSONObject json = null;
try {
json = array.getJSONObject(i);
college.setImageUrl(json.getString(Config.TAG_IMAGE_URL));
String s = (json.getString(Config.TAG_NAME));
Toast.makeText(this, s, Toast.LENGTH_SHORT).show();
college.setName(s);
} catch (JSONException e) {
e.printStackTrace();
}
listcollege.add(college);
}
adapter.notifyDataSetChanged();
}