android studio 找不到可绘制的图标

Question

I am trying to develop in android-studio on MAC and I am coming across a weird problem. Within the activity code I can not refer to an image which lies in the mipmap folder. In particular I am have created a notification as:

...

Notification notify = new NotificationCompat.Builder(this)
    .setContentTitle(title)
    .setContentText(body)
    .setSmallIcon(R.drawable.ic_launcher)
    .setContentIntent(startPendingIntent)
    .build();

...

and I receive the error "cannot resolve symbol ic_launcher". Strange is also the problem, that I can not copy-paste the icons into the drawable folder which is empty. Where and how should I place the icons in order to visible within the code in android studio?

Answer 1

您需要使用R.mipmap.ic_launcher访问 drawable

Answer 2

Close Android Studio, then open up finder. Go to the project directory. Go navigate to your project's mipmap folder. Copy the images, then go to the drawable folder and paste the images in their respective resolution folders. Open up android studio again and they should be in the drawable folder.