android内存不足错误

Question

I'm calling RESTFUL API. I'm using spring libraries. But I'm getting this OutOfMemoryError when restTemplate.exchange is executed. Below is my code snippet and error log. I'm using this code to get data from the server using webservices. On some devices this works fine but few devices throws exception.

    FormHttpMessageConverter formHttpMessageConverter = new FormHttpMessageConverter();
        formHttpMessageConverter.setCharset(Charset.forName("UTF8"));
        RestTemplate restTemplate = new RestTemplate();
        restTemplate.getMessageConverters().add(new ByteArrayHttpMessageConverter());
        restTemplate.getMessageConverters().add(new StringHttpMessageConverter());
        restTemplate.getMessageConverters().add(formHttpMessageConverter);
        restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
        restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory());
        MultiValueMap<String, String> map = new LinkedMultiValueMap<String, String>();
        DeviceInfo deviceInfo = new DeviceInfo(mContext);

        map.add("organizationId", "0");
        map.add("groupCode", securityCode);
        map.add("deviceId", deviceInfo.getDeviceID());
        map.add("version_code", deviceInfo.getVersionCode() + "");
        map.add("freshDataLoad", mode);
        HttpHeaders headers = new HttpHeaders();
        HttpEntity<MultiValueMap<String, String>> entity = new HttpEntity<MultiValueMap<String, String>>(map, headers);
        ResponseEntity<String> responseEntity = restTemplate.exchange(url, HttpMethod.POST, entity, String.class);
        String respStr = responseEntity.getBody();

following is the error log

java.lang.OutOfMemoryError
at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:94)
at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:124)
at java.lang.StringBuffer.append(StringBuffer.java:278)
at java.io.StringWriter.write(StringWriter.java:123)
at org.springframework.util.FileCopyUtils.copy(FileCopyUtils.java:189)
at org.springframework.util.FileCopyUtils.copyToString(FileCopyUtils.java:240)
at org.springframework.http.converter.StringHttpMessageConverter.readInternal(StringHttpMessageConverter.java:107)
at org.springframework.http.converter.StringHttpMessageConverter.readInternal(StringHttpMessageConverter.java:44)
at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:147)
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:98)
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:743)
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:728)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:549)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:504)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:452)
at com.example.testapp.sync.SyncStrategy.getTestData(SyncStrategy.java:
at com.example.testapp.sync.SyncWorker$2.run(SyncWorker.java:126)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.os.HandlerThread.run(HandlerThread.java:61)

Answer 1

This may happens as your application consumes a lot of memory. Try to optimize your application code.

Also, a trick may helps you : try to call garbage collector explicitly before handle this request, which requires a lot of memory.

Call: Runtime.getRuntime().gc(); to invoke garbage collector.

Refer to link: How to resolve out of memory issue