java - java.lang.ArrayIndexOutOfBoundsException:size = 2048 offset = 0 byteCount = -1

为什么在writeTo函数中会出现此异常？


  2019-07-02 12：17：03.525 13663-14248 / com.zoinla.pegasus_work
  E / AndroidRuntime：致命例外：OkHttp Dispatcher
      流程：com.xxx，PID：13663
      java.lang.ArrayIndexOutOfBoundsException：size = 2048 offset = 0 byteCount = -1
          在okio.Util.checkOffsetAndCount（Util.java:30）
          在okio.Buffer.write（Buffer.java:1096）
          在okio.Buffer.write（Buffer.java:54）
          在com.xxx.ProgressRequestBody.writeTo（ProgressRequestBody.kt：33）
          在okhttp3.MultipartBody.writeOrCountBytes（MultipartBody.java:173）
          在okhttp3.MultipartBody.writeTo（MultipartBody.java:114）
          在okhttp3.logging.HttpLoggingInterceptor.intercept（HttpLoggingInterceptor.java:202）


ProgressRequestBody

open class ProgressRequestBody(val file: File, val listener: UploadCallbacks) : RequestBody() {
    override fun contentType(): MediaType? {
        return MediaType.parse("$content_type/")
    }

    override fun writeTo(sink: BufferedSink) {
        val fileLength = file?.length()
        val buffer = ByteArray(DEFAULT_BUFFER_SIZE)
        val `in` = FileInputStream(file)
        var uploaded: Long = 0

        try {
            var read: Int
            val handler = Handler(Looper.getMainLooper())

            do {
                read = `in`.read(buffer)
                handler.post(ProgressUpdater(uploaded, fileLength!!))

                uploaded += read.toLong()
                sink.write(buffer, 0, read)

                if (read == -1) {
                    break
                }

            } while (true)
        } finally {
            `in`.close()
        }
    }

    override fun contentLength(): Long {
        return file.length()
    }

    val content_type = ""

    companion object {

        val DEFAULT_BUFFER_SIZE = 2048

    }

    private inner class ProgressUpdater(private val mUploaded: Long, private val mTotal: Long) : Runnable {

        override fun run() {
            listener?.onProgressUpdate((100 * mUploaded / mTotal).toInt())
        }
    }

    interface UploadCallbacks {
        fun onProgressUpdate(percentage: Int)
        fun onError()
        fun onFinish()
    }
}

它指向这条线

sink.write(buffer, 0, read)

最佳答案

是的，这将在read == -1时发生。使用前，应先对其进行测试：

        do {
            read = `in`.read(buffer)
            handler.post(ProgressUpdater(uploaded, fileLength!!))

            if (read == -1) {
                break
            }

            uploaded += read.toLong()
            sink.write(buffer, 0, read)

        } while (true)

也许：

        do {
            read = `in`.read(buffer)

            if (read == -1) {
                break
            }

            uploaded += read.toLong()
            sink.write(buffer, 0, read)
            handler.post(ProgressUpdater(uploaded, fileLength!!))

        } while (true)