CODEWITHSUNDEEP
androidjsonweb-services
Thien Long
Thien Long

Reputation: 349

Android: Retrieve large Json data from Webservice - get OutOfMemoryError

My Android application need to retreive a large data from an external database via webservice. The data is large, arround 60000 records (~ 21MB). I'm using AsyncHttpClient, but I never get back the result in onSuccess methods, caused by OutOfMemoryError.

public void getData(final Handler handler) {
    if (Log.isLoggable(TAG, Log.INFO)) {
        log.info("PreSynch: Start loading " + objectTypeName);
    }
    (new AsyncHttpClient()).get(presyncUrl, requestParams, new JsonHttpResponseHandler() {

        @Override
        public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
            responseResult(response);
        }

        @Override
        public void onSuccess(int statusCode, Header[] headers, JSONArray result) {
            responseResult(result);
        }

        private void responseResult(Object result) {
            // Never reach this code
            log.info(objectTypeName + " successfully loaded");
        }

        @Override
        public void onFailure(int statusCode, Header[] headers, String responseString, Throwable throwable) {
            // some logs
        }

        @Override
        public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject errorResponse) {
            // some logs
        }

        @Override
        public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONArray errorResponse) {
           // some logs
        }
    });
}

The error is:

E/AndroidRuntime﹕ FATAL EXCEPTION: Thread-209
    java.lang.OutOfMemoryError
            at java.util.ArrayList.add(ArrayList.java:114)
            at org.json.JSONArray.put(JSONArray.java:166)
            at org.json.JSONTokener.readArray(JSONTokener.java:430)
            at org.json.JSONTokener.nextValue(JSONTokener.java:103)
            at com.loopj.android.http.JsonHttpResponseHandler.parseResponse(JsonHttpResponseHandler.java:216)
            at com.loopj.android.http.JsonHttpResponseHandler$1.run(JsonHttpResponseHandler.java:120)
            at java.lang.Thread.run(Thread.java:856)

Upvotes: 1

Views: 543

Answers (1)

Hong Nguyen
Hong Nguyen

Reputation: 403

This is a limitation of Android platform, so you have to choose another design, for example paging webservice call.

Upvotes: 1

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