无法导入包 android.support.v7.app（错误：不存在）

Question

I tried looking into topics that already are on this site, but I couldn't fix my problem based on that and neither did authors I think.

I am trying to import android.support.v7.app.NotificationCompat .

Android Info p1

Android Info p2

I am new to this and I have been trying to get Android Studio to work, I am done with 1 project and after starting another I am stuck immediately with this:

error: package android.support.v7.app does not exist

build.gradle

Answer 1

You need to: import androidx.appcompat.app.AppCompatActivity .

Use it in the class the requires it eg MainActivity.

You should also have eg : implementation 'androidx.appcompat:appcompat:1.0.2'

Answer 2

If you don't want to change any code, just add the com.android.support version:

implementation "com.android.support:appcompat-v7:28.0.0"

However, as @Will suggested, using androidx is rather the current way to do it. androidx.appcompat:appcompat:1.1.0 is alike 29.1.0 (which doesn't exist).