Android Open Source - Photochat File Helper

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Back to project page Photochat.

License

The source code is released under:

This is free and unencumbered software released into the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a co...

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Java Source Code

package com.navneet.photochat;
/*from  ww  w  .ja v a2 s  .  com*/
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.io.IOUtils;

import android.content.Context;
import android.graphics.Bitmap;
import android.net.Uri;
import android.util.Log;

public class FileHelper {
  
  public static final String TAG = FileHelper.class.getSimpleName();
  
  public static final int SHORT_SIDE_TARGET = 1280;
  
  public static byte[] getByteArrayFromFile(Context context, Uri uri) {
    byte[] fileBytes = null;
        InputStream inStream = null;
        ByteArrayOutputStream outStream = null;
        
        if (uri.getScheme().equals("content")) {
          try {
            inStream = context.getContentResolver().openInputStream(uri);
            outStream = new ByteArrayOutputStream();
            
            byte[] bytesFromFile = new byte[1024*1024]; // buffer size (1 MB)
            int bytesRead = inStream.read(bytesFromFile);
            while (bytesRead != -1) {
              outStream.write(bytesFromFile, 0, bytesRead);
              bytesRead = inStream.read(bytesFromFile);
            }
            
            fileBytes = outStream.toByteArray();
          }
          catch (IOException e) {
            Log.e(TAG, e.getMessage());
          }
          finally {
            try {
              inStream.close();
              outStream.close();
            }
            catch (IOException e) { /*( Intentionally blank */ }
          }
        }
        else {
          try {
            File file = new File(uri.getPath());
            FileInputStream fileInput = new FileInputStream(file);
            fileBytes = IOUtils.toByteArray(fileInput);
          }
          catch (IOException e) {
            Log.e(TAG, e.getMessage());
          }
         }
        
        return fileBytes;
  }
  
  public static byte[] reduceImageForUpload(byte[] imageData) {
    Bitmap bitmap = ImageResizer.resizeImageMaintainAspectRatio(imageData, SHORT_SIDE_TARGET);
    
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream);
    byte[] reducedData = outputStream.toByteArray();
    try {
      outputStream.close();
    }
    catch (IOException e) {
      // Intentionally blank
    }
    
    return reducedData;
  }

  public static String getFileName(Context context, Uri uri, String fileType) {
    String fileName = "uploaded_file.";
    
    if (fileType.equals(ParseConstants.TYPE_IMAGE)) {
      fileName += "png";
    }
    else {
      // For video, we want to get the actual file extension
      if (uri.getScheme().equals("content")) {
        // do it using the mime type
        String mimeType = context.getContentResolver().getType(uri);
        int slashIndex = mimeType.indexOf("/");
        String fileExtension = mimeType.substring(slashIndex + 1);
        fileName += fileExtension;
      }
      else {
        fileName = uri.getLastPathSegment();
      }
    }
    
    return fileName;
  }
}

Java Source Code List