android--imageView使用sd卡中图片资源

ImageView jpgView = (ImageView)findViewById(R.id.jpgview);

String myJpgPath = "/sdcard/DSC_0001.JPG"; 

BitmapFactory.Options options = new BitmapFactory.Options();

options.inSampleSize = 2;

Bitmap bm = BitmapFactory.decodeFile(myJpgPath, options);

jpgView.setImageBitmap(bm);