Use anko extensions

app/src/main/java/io/legado/app/ui/main/MainActivity.kt

@@ -8,8 +8,8 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.GravityCompat
 import androidx.drawerlayout.widget.DrawerLayout
 import com.google.android.material.navigation.NavigationView
-import com.google.android.material.snackbar.Snackbar
 import io.legado.app.R
+import io.legado.app.utils.longSnackbar
 import kotlinx.android.synthetic.main.activity_main.*
 import kotlinx.android.synthetic.main.app_bar_main.*
 
@@ -22,10 +22,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
 
         setSupportActionBar(toolbar)
 
-        fab.setOnClickListener { view ->
-            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
-                .setAction("Action", null).show()
-        }
+        fab.setOnClickListener { it.longSnackbar(R.string.action) }
 
         val toggle = ActionBarDrawerToggle(
             this, drawer_layout, toolbar,