diff --git a/brouter-routing-app/src/main/java/btools/routingapp/BInstallerActivity.java b/brouter-routing-app/src/main/java/btools/routingapp/BInstallerActivity.java
index 5d375d6..6dcc259 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/BInstallerActivity.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/BInstallerActivity.java
@@ -46,6 +46,8 @@ import btools.router.RoutingHelper;
 
 public class BInstallerActivity extends AppCompatActivity {
 
+  private static final String TAG = "BInstallerActivity";
+
   private static final int DIALOG_CONFIRM_DELETE_ID = 1;
   private static final int DIALOG_CONFIRM_NEXTSTEPS_ID = 2;
   private static final int DIALOG_CONFIRM_GETDIFFS_ID = 3;
@@ -216,7 +218,7 @@ public class BInstallerActivity extends AppCompatActivity {
       Object data;
       Toast.makeText(this, R.string.msg_too_much_data, Toast.LENGTH_LONG).show();
 
-      e.printStackTrace();
+      Log.e(TAG, Log.getStackTraceString(e));
       return;
     }
 
@@ -242,10 +244,9 @@ public class BInstallerActivity extends AppCompatActivity {
         //WorkManager.getInstance(getApplicationContext()).cancelWorkById(downloadWorkRequest.getId());
       }
     } catch (ExecutionException e) {
-      e.printStackTrace();
+      Log.e(TAG, Log.getStackTraceString(e));
     } catch (InterruptedException e) {
-      Log.d("worker", "canceled " + e.getMessage());
-      //e.printStackTrace();
+      Log.d(TAG, "canceled " + e.getMessage());
     }
 
     workManager
@@ -516,10 +517,10 @@ public class BInstallerActivity extends AppCompatActivity {
       }
       return running;
     } catch (ExecutionException e) {
-      e.printStackTrace();
+      Log.e(TAG, Log.getStackTraceString(e));
       return false;
     } catch (InterruptedException e) {
-      e.printStackTrace();
+      Log.e(TAG, Log.getStackTraceString(e));
       return false;
     }
   }
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 674eaf9..efdbdfb 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/BRouterView.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/BRouterView.java
@@ -48,6 +48,8 @@ import btools.util.CheapRuler;
 
 public class BRouterView extends View {
 
+  private static final String TAG = "BRouterView";
+
   private final int memoryClass;
   RoutingEngine cr;
   private int imgw;
@@ -148,8 +150,8 @@ public class BRouterView extends View {
       try {
         td.mkdirs();
       } catch (Exception e) {
-        Log.d("BRouterView", "Error creating base directory: " + e.getMessage());
-        e.printStackTrace();
+        Log.d(TAG, "Error creating base directory: " + e.getMessage());
+        Log.e(TAG, Log.getStackTraceString(e));
       }
 
       if (!td.isDirectory()) {
@@ -173,7 +175,7 @@ public class BRouterView extends View {
 
       // new init is done move old files
       if (waitingForMigration) {
-        Log.d("BR", "path " + oldMigrationPath + " " + basedir);
+        Log.d(TAG, "path " + oldMigrationPath + " " + basedir);
         Thread t = new Thread(new Runnable() {
           @Override
           public void run() {
@@ -184,7 +186,7 @@ public class BRouterView extends View {
         try {
           t.join(500);
         } catch (InterruptedException e) {
-          e.printStackTrace();
+          Log.e(TAG, Log.getStackTraceString(e));
         }
         waitingForMigration = false;
       }
@@ -333,9 +335,9 @@ public class BRouterView extends View {
       out.close();
 
     } catch (FileNotFoundException fileNotFoundException) {
-      Log.e("tag", fileNotFoundException.getMessage());
+      Log.e(TAG, fileNotFoundException.getMessage());
     } catch (Exception e) {
-      Log.e("tag", e.getMessage());
+      Log.e(TAG, e.getMessage());
     }
   }
 
diff --git a/brouter-routing-app/src/main/java/btools/routingapp/RoutingParameterDialog.java b/brouter-routing-app/src/main/java/btools/routingapp/RoutingParameterDialog.java
index 04c2d17..d69a037 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/RoutingParameterDialog.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/RoutingParameterDialog.java
@@ -7,6 +7,7 @@ import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.os.Build;
 import android.os.Bundle;
+import android.util.Log;
 import android.window.OnBackInvokedCallback;
 import android.window.OnBackInvokedDispatcher;
 
@@ -146,7 +147,7 @@ public class RoutingParameterDialog extends AppCompatActivity {
               list.add(p);
             }
           } catch (Exception e) {
-            e.printStackTrace();
+            Log.e(TAG, Log.getStackTraceString(e));
           }
         }
       } while (line != null);
@@ -278,7 +279,7 @@ public class RoutingParameterDialog extends AppCompatActivity {
           sparams = i.getExtras().getString("PARAMS_VALUES", "");
         }
       } catch (Exception e) {
-        e.printStackTrace();
+        Log.e(TAG, Log.getStackTraceString(e));
       }
 
       getPreferenceManager().setSharedPreferencesName("prefs_profile_" + profile_hash);
diff --git a/brouter-routing-app/src/main/java/btools/routingapp/ServerConfig.java b/brouter-routing-app/src/main/java/btools/routingapp/ServerConfig.java
index 0d83d49..a059a19 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/ServerConfig.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/ServerConfig.java
@@ -2,6 +2,7 @@ package btools.routingapp;
 
 import android.content.Context;
 import android.content.res.AssetManager;
+import android.util.Log;
 
 import java.io.BufferedReader;
 import java.io.File;
@@ -13,6 +14,9 @@ import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
 public class ServerConfig {
+
+  private static final String TAG = "ServerConfig";
+
   private static String mServerConfigName = "serverconfig.txt";
 
   private String mSegmentUrl = "https://brouter.de/brouter/segments4/";
@@ -52,7 +56,7 @@ public class ServerConfig {
           }
         }
       } catch (IOException e) {
-        e.printStackTrace();
+        Log.e(TAG, Log.getStackTraceString(e));
       } finally {
         try {
           if (br != null) br.close();