Android/Java: Saving a byte array to a file (.jpeg)

Question

I am developing an application for Android, and part of the application has to takes pictures and save them to the SDcard. The onPictureTaken method returned a byte array wi

Answer 1

This Code is perfect for saving image in storage, from byte[]... note that "image" here is byte[]....taken as "byte[] image" as a parameter into a function.

    File photo=new File(Environment.getExternalStorageDirectory(), "photo.jpg");

    if (photo.exists()) {
        photo.delete();
    }

    try {
        FileOutputStream fos=new FileOutputStream(photo.getPath());
        Toast.makeText(this, photo.getPath(), Toast.LENGTH_SHORT).show();
        fos.write(image);
        fos.close();
    }
    catch (java.io.IOException e) {
        Log.e("PictureDemo", "Exception in photoCallback", e);
    }
}

Answer 2

All I need to do is save the byte array into a .jpeg image file.

Just write it out to a file. It already is in JPEG format. Here is a sample application demonstrating this. Here is the key piece of code:

class SavePhotoTask extends AsyncTask<byte[], String, String> {
    @Override
    protected String doInBackground(byte[]... jpeg) {
      File photo=new File(Environment.getExternalStorageDirectory(), "photo.jpg");

      if (photo.exists()) {
            photo.delete();
      }

      try {
        FileOutputStream fos=new FileOutputStream(photo.getPath());

        fos.write(jpeg[0]);
        fos.close();
      }
      catch (java.io.IOException e) {
        Log.e("PictureDemo", "Exception in photoCallback", e);
      }

      return(null);
    }
}

Answer 3

Here's the function to convert byte[] into image.jpg

public void SavePhotoTask(byte [] jpeg){
 File imagesFolder = new File(Environment.getExternalStorageDirectory(), "Life Lapse");
 imagesFolder.mkdirs();

 final File photo= new File(imagesFolder, "name.jpg");
 try
 {
    FileOutputStream fos=new FileOutputStream(photo.getPath());
    fos.write(jpeg);
    fos.close();
 }
 catch(Exception e)
 {

 }
}

Answer 4

Hey this codes for kotlin

camera.addCameraListener(object : CameraListener(){

        override fun onPictureTaken(result: PictureResult) {
            val jpeg = result.data //result.data is a ByteArray!
            val photo = File(Environment.getExternalStorageDirectory(), "/DCIM/androidify.jpg");
            if (photo.exists()) {
                photo.delete();
            }
            try {
                val fos = FileOutputStream(photo.getPath() );
                fos.write(jpeg);
                fos.close();
            }
            catch (e: IOException) {
                Log.e("PictureDemo", "Exception in photoCallback", e)
            }
        }
})