diff --git a/brouter-core/src/main/java/btools/router/OsmTrack.java b/brouter-core/src/main/java/btools/router/OsmTrack.java
index 66c645f0c..859fdc870 100644
--- a/brouter-core/src/main/java/btools/router/OsmTrack.java
+++ b/brouter-core/src/main/java/btools/router/OsmTrack.java
@@ -23,8 +23,8 @@
 import btools.util.FrozenLongMap;
 
 public final class OsmTrack {
-  final public static String version = "1.7.6";
-  final public static String versionDate = "20062024";
+  final public static String version = "1.7.7";
+  final public static String versionDate = "23072024";
 
   // csv-header-line
   private static final String MESSAGES_HEADER = "Longitude\tLatitude\tElevation\tDistance\tCostPerKm\tElevCost\tTurnCost\tNodeCost\tInitialCost\tWayTags\tNodeTags\tTime\tEnergy";
diff --git a/brouter-routing-app/build.gradle b/brouter-routing-app/build.gradle
index e7daacc6b..ebcc34b34 100644
--- a/brouter-routing-app/build.gradle
+++ b/brouter-routing-app/build.gradle
@@ -1,26 +1,30 @@
 import org.gradle.nativeplatform.platform.internal.DefaultNativePlatform
 
 plugins {
+    id 'base'
     id 'com.android.application'
     id 'checkstyle'
     id 'brouter.version-conventions'
 }
 
 android {
-    compileSdkVersion 33
+    compileSdk 34
+
+    base {
+        archivesName = "BRouterApp."  + project.version
+    }
 
     defaultConfig {
         namespace 'btools.routingapp'
         applicationId "btools.routingapp"
 
-        versionCode 53
+        versionCode 54
         versionName project.version
 
         resValue('string', 'app_version', defaultConfig.versionName)
-        setProperty("archivesBaseName", "BRouterApp." + defaultConfig.versionName)
 
-        minSdkVersion 14
-        targetSdkVersion 33
+        minSdkVersion 21
+        targetSdkVersion 34
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -96,22 +100,22 @@ repositories {
 }
 
 dependencies {
-    implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'androidx.appcompat:appcompat:1.7.0'
     implementation "androidx.constraintlayout:constraintlayout:2.1.4"
-    implementation 'androidx.work:work-runtime:2.8.1'
-    implementation 'com.google.android.material:material:1.8.0'
+    implementation 'androidx.work:work-runtime:2.9.0'
+    implementation 'com.google.android.material:material:1.12.0'
 
     implementation project(':brouter-mapaccess')
     implementation project(':brouter-core')
     implementation project(':brouter-expressions')
     implementation project(':brouter-util')
-    implementation 'androidx.preference:preference:1.2.0'
+    implementation 'androidx.preference:preference:1.2.1'
 
     testImplementation 'junit:junit:4.13.2'
 
-    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
-    androidTestImplementation 'androidx.work:work-testing:2.8.1'
+    androidTestImplementation 'androidx.test.ext:junit:1.2.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.6.1'
+    androidTestImplementation 'androidx.work:work-testing:2.9.0'
 }
 
 gradle.projectsEvaluated {
@@ -159,3 +163,8 @@ task generateReadmesZip(type: Zip) {
     }
     destinationDirectory = layout.buildDirectory.dir("assets")
 }
+
+tasks.withType(JavaCompile).configureEach {
+    options.compilerArgs += ['-Xlint:unchecked']
+    options.compilerArgs += ['-Xlint:deprecation']
+}
diff --git a/brouter-routing-app/src/androidTest/java/btools/routingapp/BRouterActivityTest.java b/brouter-routing-app/src/androidTest/java/btools/routingapp/BRouterActivityTest.java
index 6a6a9cd38..43b89f7a1 100644
--- a/brouter-routing-app/src/androidTest/java/btools/routingapp/BRouterActivityTest.java
+++ b/brouter-routing-app/src/androidTest/java/btools/routingapp/BRouterActivityTest.java
@@ -1,9 +1,9 @@
 package btools.routingapp;
 
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.hasItem;
 import static org.hamcrest.Matchers.not;
-import static org.junit.Assert.assertThat;
 
 import android.os.Build;
 import android.os.Environment;
diff --git a/brouter-routing-app/src/androidTest/java/btools/routingapp/DownloadWorkerTest.java b/brouter-routing-app/src/androidTest/java/btools/routingapp/DownloadWorkerTest.java
index a9004c01e..c0ce44ded 100644
--- a/brouter-routing-app/src/androidTest/java/btools/routingapp/DownloadWorkerTest.java
+++ b/brouter-routing-app/src/androidTest/java/btools/routingapp/DownloadWorkerTest.java
@@ -1,7 +1,7 @@
 package btools.routingapp;
 
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.core.Is.is;
-import static org.junit.Assert.assertThat;
 
 import android.content.Context;
 
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 5d375d67c..6dcc25936 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 @@
 
 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 void downloadAll(ArrayList<Integer> downloadList, int all) {
       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 void downloadAll(ArrayList<Integer> downloadList, int all) {
         //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 @@ private boolean isDownloadRunning(Class<?> serviceClass) {
       }
       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 674eaf94f..efdbdfb21 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 @@
 
 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 void startSetup(File baseDir, boolean storeBasedir, boolean silent) {
       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 void startSetup(File baseDir, boolean storeBasedir, boolean silent) {
 
       // 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 void run() {
         try {
           t.join(500);
         } catch (InterruptedException e) {
-          e.printStackTrace();
+          Log.e(TAG, Log.getStackTraceString(e));
         }
         waitingForMigration = false;
       }
@@ -333,9 +335,9 @@ private void copyFile(String inputPath, String inputFile, String outputPath) {
       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 356e2d339..d69a0370d 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.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 @@ static public List<RoutingParam> getParamsFromProfile(final InputStream fis) thr
               list.add(p);
             }
           } catch (Exception e) {
-            e.printStackTrace();
+            Log.e(TAG, Log.getStackTraceString(e));
           }
         }
       } while (line != null);
@@ -240,6 +241,7 @@ public void onDetach() {
     }
 
     @Override
+    @SuppressWarnings("deprecation")
     public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
 
@@ -262,10 +264,10 @@ public void onCreate(Bundle savedInstanceState) {
 
         if (i.hasExtra("PARAMS")) {
           List<?> result;
-          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
-            result = (List<?>) i.getExtras().getSerializable("PARAMS", ArrayList.class);
-          } else {
+          if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) {
             result = (List<?>) i.getExtras().getSerializable("PARAMS");
+          } else {
+            result = (List<?>) i.getExtras().getSerializable("PARAMS", ArrayList.class);
           }
           if (result instanceof ArrayList) {
             for (Object o : result) {
@@ -277,7 +279,7 @@ public void onCreate(Bundle savedInstanceState) {
           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 0d83d49fa..a059a1910 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 @@
 
 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.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 @@ private void readConfigFile(File file) {
           }
         }
       } catch (IOException e) {
-        e.printStackTrace();
+        Log.e(TAG, Log.getStackTraceString(e));
       } finally {
         try {
           if (br != null) br.close();
diff --git a/buildSrc/src/main/groovy/brouter.version-conventions.gradle b/buildSrc/src/main/groovy/brouter.version-conventions.gradle
index 8e94c81a8..b99c641cb 100644
--- a/buildSrc/src/main/groovy/brouter.version-conventions.gradle
+++ b/buildSrc/src/main/groovy/brouter.version-conventions.gradle
@@ -4,4 +4,4 @@
 // app: build.gradle (versionCode only)
 // OsmTrack (version and versionDate)
 // docs revisions.md (version and versionDate)
-version '1.7.6'
+version '1.7.7'
diff --git a/docs/revisions.md b/docs/revisions.md
index 6268d6a21..e58e2a969 100644
--- a/docs/revisions.md
+++ b/docs/revisions.md
@@ -2,7 +2,12 @@
 
 (ZIP-Archives including APK, readme + profiles)
 
-### [brouter-1.7.6.zip](../brouter_bin/brouter-1.7.6.zip) (current revision, 20.06.2024)
+### [brouter-1.7.7.zip](../brouter_bin/brouter-1.7.7.zip) (current revision, 23.07.2024)
+
+- new Android API 34
+
+
+### [brouter-1.7.6.zip](../brouter_bin/brouter-1.7.6.zip) (20.06.2024)
 
 Android