How to Set Background Image from asset folder in android?

I am facing problem while setting the backGround Image of LinearLayout from asset folder.

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

Can someone开发者_如何学C help me out.

First you create a Drawable object from the asset file:

Drawable d = Drawable.createFromStream(getAssets().open(path_in_assets), null);

and then set it to some View that only supports Drawables as a background.

As far as I'm aware, you cannot access assets directly like you are trying to. You'll need to use the AssetManager class to get at your data if you want to store it as an asset. Here's a pretty decent blog post explaining a bit about resources and assets, though the official documentation is also a good resource, of course.

I'll also add, though, that things like background images are typically best stored in res/drawable and accessed using the R.drawable.* style (the blog post linked above also discusses this) whenever possible. It's not really clear why you need to do it this way from your provided code sample, though, so I suppose that's ultimately your call.

EDIT: added create image from InputStream...

I had the similar problem using ImageButton. I figured it out by loading bitmap from assets and using it as image for ImageButton. Probably not a good approach, but is working and solved my problem - unability to have subfolders in drawable dir and not allowed characters in file names.

(Yes, I can use prefix instead of subdir, and rename files to match the pattern (lowercase only and numbers) and I probably will do it later.)

InputStream is = null;
try {
  is = this.getResources().getAssets().open("Images/Fruits/Apple.png");
} catch (IOException e) {
  Log.w("EL", e);
}

Bitmap image = BitmapFactory.decodeStream(is);

ImageButton ib2 = (ImageButton) findViewById( R.id.imageButton2);
ib2.setImageBitmap( image);