Android studio导入import android.support.v7.app.AppCompatActivity报错

换成：import androidx.appcompat.app.AppCompatActivity;
support包换成Androidx包

常用的包
import android.content.BroadcastReceiver;
import android.content.Intent;
import android.widget.Toast;
import android.content.Context;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;