Question

美好的一天所有，根据我之前提出的问题，我已经能够将文件转换为字节数组，以便使用此方法使用write方法：

public void sendFile(){
        Log.d(TAG, "sending data");
        InputStream inputStream = null;

      Uri uri = Uri.withAppendedPath(MediaStore.Images.Media.INTERNAL_CONTENT_URI, "" +    filesID.get(0));
        Log.d(TAG, "obtained input stream here in recentDevices Activity");
        try {

            inputStream = getContentResolver().openInputStream(uri);
            ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();


            int buffersize = 1024;
            byte[] buffer = new byte[buffersize];

            int len = 0;
            while((len = inputStream.read(buffer)) != -1){
                byteBuffer.write(buffer, 0, len);
            }

            Log.d(TAG, "sending data to connected thread");
            bluetooth_service.write(byteBuffer.toByteArray());

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();

        }

        finally{
            if(inputStream != null){
                try {
                    inputStream.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }


    }

并且从BluetoothChatService示例中我在连接的线程中有这个写入方法：

   public void write(byte[] out) {
        // Create temporary object
        ConnectedThread r;
        // Synchronize a copy of the ConnectedThread
        synchronized (this) {
            r = connectedThread;
        }
        // Perform the write unsynchronized
        r.write(out);
    }


/* Call this from the main Activity to send data to the remote device */
        public void write(byte[] bytes) {

            try {
                mmOutStream.write(bytes); // basically stuck here. nothing happens here
            } catch (IOException e) { }

            mHandler.sendEmptyMessage(RecentDevices.TRANSFER_COMPLETED);

        }

基本上卡在连接线程的write方法中，似乎没有发生任何事情。在处理程序发送TRANSFER_COMPLETED方法之后，我放了一个进度对话框来解除它，但程序只是卡在这里。尝试过发送到电脑或其他Android设备。没运气！任何人都有成功或有解决方案吗？

Answer 1

您的读输入流方法怎么样？

基于SO上的很多帖子，我使用此代码来读取输入流：

public void run() {
    Log.i(TAG, "BEGIN mConnectedThread");
    int bufferSize = 4096;
    byte[] buffer = new byte[bufferSize];
    // Keep listening to the InputStream while connected
    while (true) {
        try {
            // Read from the InputStream
            int bytesRead = -1;
            String message = "";
            if (mmInStream.available() > 0) {
                bytesRead = mmInStream.read(buffer);
                if (bytesRead > 0) {
                    while ((bytesRead == bufferSize) && (buffer[bufferSize - 1] != 0)) {
                        message = message + new String(buffer, 0, bytesRead);
                        bytesRead = mmInStream.read(buffer);
                    }
                    if((buffer[bytesRead - 1] != 0)) {
                        message = message + new String(buffer, 0, bytesRead); 
                    } else {
                        message = message + new String(buffer, 0, bytesRead - 1);    
                    }
                    mHandler.obtainMessage(ViewContactList.MESSAGE_READ, message.getBytes().length, -1, message).sendToTarget();
                } 
            }
        } catch (IOException e) {
            Log.e(TAG, "disconnected", e);
            connectionLost(e.getMessage());
            break;
        }
    }
}

在ConnectedThread的{{1}}内进行试用。

基于BluetoothChat示例通过蓝牙套接字发送文件

1 个答案: