如何在android中的imageview中设置图像？

我想在imageview中显示图片，所以我在 res 中创建了一个文件夹 - drawable 并放置了我的图像那里。像 apple.png 之类的东西。然后我使用这段代码：

I want to show an image in imageview so I made a folder - drawable in res and put my image there. Something like apple.png. Then I use this code:

ImageView iv= (ImageView)findViewById(R.id.img_selected_image);
String path = getApplication().getFilesDir().getAbsolutePath();
InputStream is = new FileInputStream(path + "/apple.png");
Drawable icon = new BitmapDrawable(is);
Log.i("Fnord", "width="+icon.getIntrinsicWidth()+
     " height="+icon.getIntrinsicHeight());
iv.setImageDrawable(icon);

但是当我运行它时，它表示没有任何图像 apple.png 中的名称data / data / package-name / files 。我想我把我的形象放在了不适当的地方。我应该把我的图像放在哪里？

But when i run it, it said there isn't any image by apple.png name in data/data/package-name/files. I think i put my image in inappropriate place. Where should i put my image ?