diff --git a/brouter-routing-app/src/main/java/btools/routingapp/BRouterActivity.java b/brouter-routing-app/src/main/java/btools/routingapp/BRouterActivity.java
index f9e244a..2424f88 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/BRouterActivity.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/BRouterActivity.java
@@ -38,7 +38,7 @@ import androidx.core.os.EnvironmentCompat;
 
 import btools.router.OsmNodeNamed;
 
-public class BRouterActivity extends Activity {
+public class BRouterActivity extends Activity implements ActivityCompat.OnRequestPermissionsResultCallback {
 
   private static final int DIALOG_SELECTPROFILE_ID = 1;
   private static final int DIALOG_EXCEPTION_ID = 2;
@@ -670,15 +670,6 @@ public class BRouterActivity extends Activity {
     mWakeLock.release();
   }
 
-  public boolean checkSelfPermission (Context context, String perm ) {
-    boolean b = checkSelfPermission(context, perm);
-    if (b) {
-      ActivityCompat.requestPermissions (this, new String[]{perm}, 0);
-    }
-
-    return b;
-  }
-
   private String getStorageState(File f) {
     return EnvironmentCompat.getStorageState(f); //Environment.MEDIA_MOUNTED
   }
@@ -728,4 +719,15 @@ public class BRouterActivity extends Activity {
     }
     return isWritable;
   }
+
+  @Override
+  public void onRequestPermissionsResult (int requestCode, String[] permissions, int[] grantResults) {
+    if (requestCode == 0) {
+      if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+        mBRouterView.startSetup(null, true);
+      } else {
+        mBRouterView.init();
+      }
+    }
+  }
 }
diff --git a/brouter-routing-app/src/main/java/btools/routingapp/BRouterView.java b/brouter-routing-app/src/main/java/btools/routingapp/BRouterView.java
index 618b91d..dd39382 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/BRouterView.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/BRouterView.java
@@ -38,6 +38,9 @@ import android.view.View;
 import android.widget.Toast;
 
 
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+
 import btools.expressions.BExpressionContextWay;
 import btools.expressions.BExpressionMetaData;
 import btools.mapaccess.OsmNode;
@@ -176,9 +179,9 @@ public class BRouterView extends View
       }
 
       if ( !td.isDirectory() ) {
-        if ( ( (BRouterActivity) getContext() ).checkSelfPermission (getContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
-        // if (ContextCompat.checkSelfPermission (getContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
+        if (ContextCompat.checkSelfPermission (getContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
           retryBaseDir = baseDir;
+          ActivityCompat.requestPermissions ((BRouterActivity) getContext(), new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 0);
         } else {
           ( (BRouterActivity) getContext() ).selectBasedir( ( (BRouterActivity) getContext() ).getStorageDirectories (), guessBaseDir(), "Cannot access " + baseDir.getAbsolutePath () + "; select another");
         }