由网友(摘星)分享简介：我目前已经有两个活动。一个用于从SD卡，一个用于蓝牙连接拉动图像I have currently have got two activities. One for pulling the image from the SD card and one for Bluetooth connection.我已经利用一个包...

我目前已经有两个活动。一个用于从SD卡，一个用于蓝牙连接拉动图像

I have currently have got two activities. One for pulling the image from the SD card and one for Bluetooth connection.

我已经利用一个包从活动1传输图像的URI。

I have utilized a Bundle to transfer the Uri of the image from activity 1.

现在我希望做的就是让该URI在蓝牙活动，并将其转化为通过字节数组可传输的状态，我已经看到了一些例子，但我似乎无法让他们为我的code ！

Now what i wish to do is get that Uri in the Bluetooth activity to and convert it into a transmittable state via Byte Arrays i have seen some examples but i can't seem to get them to work for my code!!

Bundle goTobluetooth = getIntent().getExtras();
    test = goTobluetooth.getString("ImageUri");

是我穿过去拉它，什么是下一个步骤？

is what i have to pull it across, What would be the next step?

非常感谢

杰克

推荐答案

在乌里获得字节[] 我做下面的事情，

From Uri to get byte[] I do the following things,

InputStream iStream =   getContentResolver().openInputStream(uri);
byte[] inputData = getBytes(iStream);

和的GetBytes（InputStream中）的方法是：

public byte[] getBytes(InputStream inputStream) throws IOException {
      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);
      }
      return byteBuffer.toByteArray();
    }