assets 读取文件

读取文字文件（txt，xml）

  InputStream is = getAssets().open("about.txt");
            
            int size = is.available();
            byte[] buffer = new byte[size];
            is.read(buffer);
            is.close();
            String text = new String(buffer);
            TextView tv = (TextView)findViewById(R.id.text);
            tv.setText(text);

读取图片资源

 Bitmap bgImg = getImageFromAssetFile("background.png")