android - okhttp3大文件下载OutOfMemoryError

Question

我尝试通过 okhttp3 下载 zip 文件(大小 160 Mb)。几秒钟后应用程序崩溃并出现堆栈:

java.lang.IllegalStateException: Fatal Exception thrown on Scheduler.Worker thread. at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:59) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428) at java.util.concurrent.FutureTask.run(FutureTask.java:237) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) at java.lang.Thread.run(Thread.java:761) Caused by: java.lang.OutOfMemoryError: Failed to allocate a 8204 byte allocation with 1688 free bytes and 1688B until OOM at okio.Segment.(Segment.java:61) at okio.SegmentPool.take(SegmentPool.java:46) at okio.Buffer.writableSegment(Buffer.java:1151) at okio.Okio$2.read(Okio.java:136) at okio.AsyncTimeout$2.read(AsyncTimeout.java:238) at okio.RealBufferedSource.read(RealBufferedSource.java:45) at okhttp3.internal.http.Http1xStream$FixedLengthSource.read(Http1xStream.java:377) at okio.RealBufferedSource.request(RealBufferedSource.java:66) at okhttp3.logging.HttpLoggingInterceptor.intercept(HttpLoggingInterceptor.java:238) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:170) at okhttp3.RealCall.execute(RealCall.java:60) at com.bvs.data.MapService$2.call(MapService.java:102) at com.bvs.data.MapService$2.call(MapService.java:94) at rx.Observable.unsafeSubscribe(Observable.java:10142)

这是我的代码:

Observable.create((Observable.OnSubscribe<ResponseBody>) subscriber -> {
        Timber.e("Start zip loading");
        Request request = new Request.Builder()
                .url(Tweakables.DEV_API_ENDPOINT + "files/" + Tweakables.MAP_ZIP)
                .build();
        try {
            Response response = client.newCall(request).execute(); // Crash appeared at this line 
            subscriber.onNext(response.body());
            response.close();
        } catch (IOException e) {
            subscriber.onError(e);
        }
    })
            .subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(new Observer<ResponseBody>() {
                @Override
                public void onCompleted() {

                }

                @Override
                public void onError(Throwable e) {
                    e.printStackTrace();
                }

                @Override
                public void onNext(ResponseBody responseBody) {

                }
            });

Answer 1

也许会对某人有所帮助。通过使用 Retrofit 注释 Streaming

解决了问题

@Streaming
@GET("files/"+Tweakables.MAP_ZIP)
Call<ResponseBody> downloadMap();