Getting the Byte Array using just the image name

问题

I am stuck in a situation. I have some set of 10 images in drawable folder. During my code I have just the image name. for e.g "elephant.png" and I want the byte array of the image( drawable ) corressponding to image name.

String imageName = getResources().getResourceEntryName(GroupIconAdapter.mThumbIds[position]);

From here I get the image name and I want byte array.

Is is possible?

Thanks

回答1:

Put this images into your assests directory and you can access like this way

String url = "file:///android_asset/elephant.png";

回答2:

try as:

 // get Drawable id 
int drawableid =getResources().getIdentifier(GroupIconAdapter.mThumbIds[position], 
                       "drawable",this.getPackageName());

Drawable drawable_img = getResources().getDrawable(drawableid);  // get Drawable

Bitmap drawable_bitmap = ((BitmapDrawable)drawable_img).getBitmap();
ByteArrayOutputStream outstream = new ByteArrayOutputStream();
drawable_bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outstream);

// get byte array here
byte[] bytearray_of_drawable = outstream.toByteArray();

回答3:

I think this way should move right

First of all I should put my images in the assets folder and then making the drawbles for the same

String filePath="file:///android_asset/images/test.png";
Drawable d = Drawable.createFromPath(filePath);

and then doing the respective streamings to make a byte array -

Bitmap drawable_bitmap = ((BitmapDrawable)d).getBitmap();
ByteArrayOutputStream outstream = new ByteArrayOutputStream();
drawable_bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outstream);

// get byte array here
byte[] bytearray_of_drawable = outstream.toByteArray();

This way we can get the image name's drawable and corresponding byte array.

Thanks

来源：https://stackoverflow.com/questions/14055091/getting-the-byte-array-using-just-the-image-name

标签

android

uiimageview

bytearray