Question

我尝试使用Firebase存储下载文件，但即使我在onHandleIntent中调用它，我也会收到此错误。

@Override
protected void onHandleIntent(Intent intent) {
    if (intent != null) {
        final String action = intent.getAction();
        switch (action) {
            case ACTION_DOWNLOAD:
                ArrayList<Talk> talks = intent.getParcelableArrayListExtra(EXTRA_TALKS);
                if (talks == null) return;
                handleDownload(talks);
                break;
        }
    }
}

这是我尝试在本地复制文件的地方。

private void handleDownload(ArrayList<Talk> talks) {
    for (final Talk talk : talks) {
        FirebaseStorage.getInstance()
                   .getReferenceFromUrl(talk.getUrl())
                   .getStream()
                   .addOnSuccessListener(new OnSuccessListener<StreamDownloadTask.TaskSnapshot>() {
                    @Override
                    public void onSuccess(StreamDownloadTask.TaskSnapshot taskSnapshot) {
                        try {
                            File file = new File(DEFAULT_TALKS_DIR, "name_" + UUID.randomUUID());
                            IOUtils.copyLarge(taskSnapshot.getStream(), new FileOutputStream(file));

                            talk.setPath(file.getAbsolutePath());
                            TalksDatabase.getInstance(context).insertTalk(talk);
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                });
        }
}

完整的例外：

android.os.NetworkOnMainThreadException
    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1303)
    at com.android.org.conscrypt.Platform.blockGuardOnNetwork(Platform.java:300)
    at com.android.org.conscrypt.OpenSSLSocketImpl$SSLInputStream.read(OpenSSLSocketImpl.java:741)
    at com.android.okhttp.okio.Okio$2.read(Okio.java:136)
    at com.android.okhttp.okio.AsyncTimeout$2.read(AsyncTimeout.java:211)
    at com.android.okhttp.okio.RealBufferedSource.read(RealBufferedSource.java:50)
    at com.android.okhttp.internal.http.HttpConnection$FixedLengthSource.read(HttpConnection.java:418)
    at com.android.okhttp.okio.RealBufferedSource$1.read(RealBufferedSource.java:371)
    at com.google.firebase.storage.StreamDownloadTask$zza.read(Unknown Source)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
    at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
    at java.io.FilterInputStream.read(FilterInputStream.java:107)
    at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1792)
    at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1769)
    at eu.long1.jwnotes.services.ReceiveService$4.onSuccess(ReceiveService.java:206)
    at eu.long1.jwnotes.services.ReceiveService$4.onSuccess(ReceiveService.java:200)
    at com.google.firebase.storage.StorageTask$1.zza(Unknown Source)
    at com.google.firebase.storage.StorageTask$1.zzk(Unknown Source)
    at com.google.firebase.storage.zze$2.run(Unknown Source)
    at android.os.Handler.handleCallback(Handler.java:751)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6119)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

更新你们是对的，从主线程中调用了监听器。我刚刚使用@AlexShutov

找到了这个

public zzbtz(@Nullable Executor var1) {
        this.zzbFQ = var1;
        if(this.zzbFQ == null) {
            this.mHandler = new Handler(Looper.getMainLooper());
        } else {
            this.mHandler = null;
        }
    }

Answer 1

Firebase在主线程上调用.onSuccess（）回调方法，以方便用户使用。您尝试从流复制到文件，这涉及网络操作。尝试在后台制作副本。

在IntentService中使用Firebase存储的NetworkOnMainThreadException

1 个答案: