Varying ImageView source according to value

I would like to show something similar to a progressbar by using different images, for exampl开发者_如何学Goe an empty lawn if progress = 0 and a nearly complete house if progress = 95.

I have 30 files named image1.jpg .... image30.jpg

Would it be possible to set the Drawable of an ImageView by using a string for the file name? That way I could just get an int between 1 and 30 from the progress and add that to a string that I use to set the Drawable.

I have read this: Android: Imageview showing an image according to edittext option but I don't want to write code for every case as I would like to use this function at different places of a project.

I would be very grateful for any help, either on how I can use strings and filenames for the Drawable or if there is another way of solving this.

Best regards, Emil

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public void setImageSrc(int i){
    final ImageView iv = (ImageView) findViewById(R.id.naviView);
    iv.setImageResource(getResources().getIdentifier("image"+i, "drawable", "com.example"));
}

You can retrieve the id if you know the name of the resources and then set the image via the id you determined earlier