So, I've been stuck on this issue for a week where I launch my app and it freezes for almost 10 seconds on a white screen and after that the app gets really slow. I have a bottomnavigationview with a viewpager that loads four fragments, some of which have recyclerviews with custom adapters. Everytime I swipe or select a different tab, the app is painfully slow to select the new tab. Even the recyclerview scrolling is really slow. The weird part is that when data is switched off, the app works just fine and the viewpager swipes and recyclerview scrolls are fast enough.
I have seen several suggestions which suggest using gson parsing for the json data received from online, but the performance increase was negligible. I have also tried viewPager.setOffscreenPageLimit(4); but that hasn't helped. All my network calls have been placed on an asycntask and I have used StrictMode to confirm that. The app also works ok on an emulator, so the problem is only on real devices of all apis that I have tested.
//First Fragment
public void loadData(final Context context, final boolean b) {
HurlStack hurlStack = new HurlStack() {
@Override
protected HttpURLConnection createConnection(URL url) {
HttpsURLConnection httpsURLConnection = null;
try {
httpsURLConnection = CustomCAHttpsProvider.getHttpsUrlConnection(ServerConstants.LOAD_CHAT_URL, InfosylumApplication.getContext(), R.raw.certificate, false);
} catch (Exception e) {
e.printStackTrace();
Helper.showErrorDialog(e.getMessage(), e.toString(), InfosylumApplication.getContext());
}
return httpsURLConnection;
}
};
StringRequest stringRequest = new StringRequest(Request.Method.POST, ServerConstants.LOAD_CHAT_URL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
mSwipeRefreshLayout.setRefreshing(false);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
if (isRunning) {
loadData(context, b);
}
}
}, 3000);
try {
JSONObject jsonObject = new JSONObject(response).getJSONObject("object");
TinyDB tinyDB = new TinyDB(context);
tinyDB.putString(TinyDBConstants.LOCAL_TYPING, "");
if (jsonObject.has("groupsAndInd")) {
final JSONArray array = jsonObject.getJSONArray("groupsAndInd");
LinkedHashMap<String, ChatNotification> chatNotificationLinkedHashMap = new LinkedHashMap<>();
final JSONArray localChatArray;
if (!tinyDB.getString(TinyDBConstants.LOCAL_CHAT_OTHER).isEmpty()) {
localChatArray = new JSONArray(tinyDB.getString(TinyDBConstants.LOCAL_CHAT_OTHER));
} else {
localChatArray = new JSONArray();
}
ArrayList<String> localChatIds = new ArrayList<>();
final ArrayList<String> onlineChatIds = new ArrayList<>();
String idsString = "";
for (int i = 0; i < localChatArray.length(); i++) {
JSONObject foodJson = localChatArray.getJSONObject(i);
localChatIds.add(foodJson.getString("id"));
idsString += foodJson.getString("id") + "\n";
}
for (int i = 0; i < array.length(); i++) {
JSONObject object = array.getJSONObject(i);
List<String> urlList = Arrays.asList(object.getString("seenUsers").split(","));
if ((!urlList.contains(PatriceUser.getCurrentUser().getObjectId()) || object.getInt("messageStatus") < (Const.MESSAGE_STATUS_RECEIVED)) && !localChatIds.contains(object.getString("id")) && !object.getString("senderId").equals(PatriceUser.getCurrentUser().getObjectId())) {
String id = null, chatType = null;
switch (object.getString("chatType")) {
case Const.CHAT_TYPE_GROUP:
id = object.getString("groupId");
chatType = Const.CHAT_TYPE_GROUP;
break;
case Const.CHAT_TYPE_INDIVIDUAL:
id = object.getString(Const.SENDER_ID);
chatType = Const.CHAT_TYPE_INDIVIDUAL;
break;
}
boolean found = false;
if (chatNotificationLinkedHashMap.containsKey(id)) {
ChatNotification chatNotification = chatNotificationLinkedHashMap.get(id);
chatNotification.addChatObject(object);
chatNotificationLinkedHashMap.put(id, chatNotification);
} else {
ChatNotification chatNotification = new ChatNotification(context, chatType, id, object);
chatNotificationLinkedHashMap.put(id, chatNotification);
}
}
onlineChatIds.add(object.getString("id"));
}
tinyDB.putString(TinyDBConstants.LOCAL_CHAT_OTHER, array.toString());
for (Map.Entry<String, ChatNotification> entry : chatNotificationLinkedHashMap.entrySet()) {
String key = entry.getKey();
ChatNotification value = entry.getValue();
final InfosylumNotification infosylumNotification = new InfosylumNotification(context);
infosylumNotification.showNotification(value);
}
}
try {
if (jsonObject.has("groupsAndInd")) {
getActualMessages(jsonObject.getJSONArray("groupsAndInd"), jsonObject.getJSONArray("unread"));
}
if (jsonObject.has("notes")) {
loadNotes(jsonObject.getJSONArray("notes"));
}
} catch (NullPointerException ignore) {
Helper.showErrorDialog("ignore", ignore.getMessage(), getActivity());
}
} catch (JSONException e) {
} catch (NullPointerException e) {
//When the user has logged out
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("userId", PatriceUser.getCurrentUser().getObjectId());
params.put("loadGroupsQuery", loadGroupsQuery);
return params;
}
};
stringRequest.setRetryPolicy(new DefaultRetryPolicy(
40000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
VolleySingleton.getInstance(activity).addToRequestQueue(stringRequest);
stringRequest.setTag(REQUEST_TAG);
if (requestQueue == null) {
requestQueue = Volley.newRequestQueue(InfosylumApplication.getContext(), hurlStack);
}
requestQueue.add(stringRequest);
}
The other fragments are quite similar in how they obtain data there are also background jobs within the app and I think the hardest thing to do is to pinpoint which method is causing the bug. Also, using the profiler is out of the question because the device being used is of API 17. I'd just like to ask, is there any way I can pinpoint which method exactly is causing the sluggishness and the occasional ANRs that I receive?
