A writable sink for bytes. Most clients will use output streams that write data to the file system, the network, or to an in-memory byte array.
1. In the MainActivity.java file, add the line below to the imports section.
import java.io.OutputStream;
2.Add the code below to the onCreate method. This will declare an OutputStream named myOutputStream and set it to null.
OutputStream myOutputStream = null;
3. Compile and run!
