StreamUtils.java :  » Pdf » apv » cx » hell » android » pdfview » Android Open Source

package cx.hell.android.pdfview;

import java.io.IOException;
import java.io.InputStream;

import android.util.Log;
import android.widget.ProgressBar;

public class StreamUtils {
  
  public static byte[] readBytesFully(InputStream i) throws IOException {
    return StreamUtils.readBytesFully(i, 0, null);
  }
  
  public static byte[] readBytesFully(InputStream i, int max, ProgressBar progressBar) throws IOException {
    byte buf[] = new byte[4096];
    int totalReadBytes = 0;
    while(true) {
      int readBytes = 0;
      readBytes = i.read(buf, totalReadBytes, buf.length-totalReadBytes);
      if (readBytes < 0) {
        // end of stream
        break;
      }
      totalReadBytes += readBytes;
      if (progressBar != null) progressBar.setProgress(totalReadBytes);
      if (max > 0 && totalReadBytes > max) {
        throw new IOException("Remote file is too big");
      }
      if (totalReadBytes == buf.length) {
        // grow buf
        Log.d("cx.hell.android.pdfview", "readBytesFully: growing buffer from " + buf.length + " to " + (buf.length*2));
        byte newbuf[] = new byte[buf.length*2];
        System.arraycopy(buf, 0, newbuf, 0, totalReadBytes);
        buf = newbuf;
      }
    }
    byte result[] = new byte[totalReadBytes];
    System.arraycopy(buf, 0, result, 0, totalReadBytes);
    return result;
  }
  
  public static String readStringFully(InputStream i) throws IOException {
    byte[] b = StreamUtils.readBytesFully(i);
    return new String(b, "utf-8");
  }
  
}