diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d392f0e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.jar
diff --git a/BleUtil.java b/BleUtil.java
new file mode 100644
index 0000000..8b582d3
--- /dev/null
+++ b/BleUtil.java
@@ -0,0 +1,35 @@
+package st.wow.git.ble;
+
+import java.lang.Runnable;
+import android.util.Log;
+import java.lang.Class;
+import java.lang.ClassLoader;
+import java.lang.reflect.Constructor;
+import android.os.Handler;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothManager;
+import android.content.Context;
+import android.content.Intent;
+
+public class BleUtil {
+	public void Enable(Context ctx) {
+		Log.d("gio", "BleUtil Enable: manager");
+		BluetoothManager manager = (BluetoothManager) ctx.getSystemService(ctx.BLUETOOTH_SERVICE);
+		Log.d("gio", "BleUtil Enable: adapter");
+		BluetoothAdapter ad = (BluetoothAdapter) manager.getAdapter();
+		if (ad == null || !ad.isEnabled()) {
+			Log.d("gio", "BleUtil Enable: handler");
+			Handler handler = new Handler(ctx.getMainLooper());
+			//BleEnabler en = new BleEnabler(ctx, ad);
+			Log.d("gio", "BleUtil Enable: Intent");
+			Intent enableBtIntent = new Intent(ad.ACTION_REQUEST_ENABLE);
+			Log.d("gio", "BleUtil Enable: handler.post");
+			handler.post(new Runnable() {
+				public void run() {
+					ctx.startActivity(enableBtIntent);
+				}
+			});
+		}
+	}
+}
+
diff --git a/ble_android.go b/ble_android.go
index 1764404..41f046e 100644
--- a/ble_android.go
+++ b/ble_android.go
@@ -1,9 +1,14 @@
+//go:generate mkdir -p classes
+//go:generate javac -bootclasspath $ANDROID_HOME/platforms/android-29/android.jar -d classes BleUtil.java
+//go:generate jar cf BleUtil.jar -C classes .
+//go:generate rm -rf classes
+
 package ble
 
 import (
 	"log"
 	"gioui.org/app"
-	_ "gioui.org/permission/bluetooth"
+	_ "gioui.org/app/permission/bluetooth_le"
 )
 
 /*