Update

app/src/main/AndroidManifest.xml

@@ -22,7 +22,7 @@
         </activity>
 
         <service
-            android:name=".services.FloatingView"
+            android:name=".services.FloatingViewService"
             android:enabled="true"
             android:exported="false" />
 

app/src/main/java/com/github/facecommands/Utils.java

@@ -1,14 +1,61 @@
 package com.github.facecommands;
 
+import android.app.ActivityManager;
 import android.content.Context;
 import android.provider.Settings;
+import android.util.Log;
+
+import com.github.facecommands.camera.GraphicOverlay;
+import com.github.facecommands.faces.GraphicFaceTrackerFactory;
+import com.github.facecommands.faces.OnFaceGesture;
+import com.google.android.gms.vision.CameraSource;
+import com.google.android.gms.vision.MultiProcessor;
+import com.google.android.gms.vision.face.FaceDetector;
 
 public class Utils {
 
+    private final static String TAG = "Utils";
+
     public static boolean isAccessServiceEnabled(Context context, Class accessibilityServiceClass)
     {
         String prefString = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES);
         return prefString!= null && prefString.contains(context.getPackageName() + "/" + accessibilityServiceClass.getName());
     }
 
+
+    public static boolean isServiceRunning(Class<?> serviceClass, Context context) {
+        ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
+        for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
+            if (serviceClass.getName().equals(service.service.getClassName())) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Creates and starts the camera.  Note that this uses a higher resolution in comparison
+     * to other detection examples to enable the barcode detector to detect small barcodes
+     * at long distances.
+     */
+    public static CameraSource createCameraSource(Context context, GraphicOverlay graphicOverlay, OnFaceGesture onFaceGesture) {
+
+        FaceDetector detector = new FaceDetector.Builder(context)
+                .setClassificationType(FaceDetector.ALL_CLASSIFICATIONS)
+                .build();
+
+        detector.setProcessor(
+                new MultiProcessor.Builder<>(new GraphicFaceTrackerFactory(graphicOverlay, onFaceGesture))
+                        .build());
+
+        if (!detector.isOperational()) {
+            Log.w(TAG, "Face detector dependencies are not yet available.");
+        }
+
+        return new CameraSource.Builder(context, detector)
+                .setRequestedPreviewSize(640, 480)
+                .setFacing(CameraSource.CAMERA_FACING_FRONT)
+                .setRequestedFps(25.0f)
+                .build();
+    }
 }

app/src/main/java/com/github/facecommands/activities/MainActivity.kt

@@ -11,9 +11,11 @@ import android.view.View
 import android.widget.*
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.app.ActivityCompat
-import com.github.facecommands.services.FloatingView
+import com.github.facecommands.Utils
+import com.github.facecommands.services.FloatingViewService
 import com.github.facecommands.Utils.isAccessServiceEnabled
 import com.github.facecommands.databinding.ActivityMainBinding
+import com.github.facecommands.services.AutoService
 
 
 class MainActivity : AppCompatActivity(), View.OnClickListener, CompoundButton.OnCheckedChangeListener, AdapterView.OnItemSelectedListener {
@@ -25,7 +27,7 @@ class MainActivity : AppCompatActivity(), View.OnClickListener, CompoundButton.O
         private const val RC_HANDLE_CAMERA_PERM = 2
         private const val RC_HANDLE_ACCESSIBILITY = 3
         private const val RC_HANDLE_SETTINGS = 4
-        private const val MY_PREFS = "faceCommands"
+        public const val MY_PREFS = "faceCommands"
         private const val TAG = "MainActivity"
     }
 
@@ -41,11 +43,10 @@ class MainActivity : AppCompatActivity(), View.OnClickListener, CompoundButton.O
         binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
-
         loadSettings()
 
         // Setup switch
-        refreshSwitches()
+        refreshStartBtn()
 
 
         // Setup spinner
@@ -68,9 +69,7 @@ class MainActivity : AppCompatActivity(), View.OnClickListener, CompoundButton.O
         binding.rightEyeSpinner.onItemSelectedListener = this
         binding.leftEyeSpinner.onItemSelectedListener = this
 
-
-
-        //findViewById<View>(R.id.startFloat).setOnClickListener(this)
+        binding.startFloat.setOnClickListener(this)
     }
 
     private fun saveSettings() {
@@ -122,16 +121,21 @@ class MainActivity : AppCompatActivity(), View.OnClickListener, CompoundButton.O
 
 
     override fun onClick(v: View?) {
-        if (Settings.canDrawOverlays(this)) {
-            startService(Intent(this@MainActivity, FloatingView::class.java))
-            finish()
-        } else {
-            askPermission()
-            Toast.makeText(
-                    this,
-                    "You need System Alert Window Permission to do this",
-                    Toast.LENGTH_SHORT
-            ).show()
+
+        if(v == null)
+            return
+
+        if(v.id == binding.startFloat.id ) {
+            if(Utils.isServiceRunning(FloatingViewService::class.java, this)) {
+                binding.startFloat.text = "Already running"
+                binding.startFloat.isEnabled = false
+                return
+            }
+            else
+            {
+                startService(Intent(this@MainActivity, FloatingViewService::class.java))
+                finish()
+            }
         }
     }
 
@@ -167,11 +171,11 @@ class MainActivity : AppCompatActivity(), View.OnClickListener, CompoundButton.O
                     "Camera permission granted - initialize the camera source"
             )
             // we have permission
-            refreshSwitches()
+            refreshStartBtn()
             return
         }
         Toast.makeText(this, "Permission not granted", Toast.LENGTH_SHORT).show()
-        refreshSwitches()
+        refreshStartBtn()
     }
 
     override fun onCheckedChanged(p0: CompoundButton?, p1: Boolean) {
@@ -192,13 +196,10 @@ class MainActivity : AppCompatActivity(), View.OnClickListener, CompoundButton.O
                 openSettings()
         }
         else if(p0.id == binding.accessibilitySwitch.id) {
-            if(p1)
-                startActivityForResult(
-                        Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS),
-                        RC_HANDLE_ACCESSIBILITY
-                );
-            else
-                openSettings()
+            startActivityForResult(
+                Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS),
+                RC_HANDLE_ACCESSIBILITY
+            )
         }
     }
 
@@ -214,18 +215,18 @@ class MainActivity : AppCompatActivity(), View.OnClickListener, CompoundButton.O
         super.onActivityResult(requestCode, resultCode, data)
         if (requestCode == RC_HANDLE_ACCESSIBILITY) {
             if (resultCode == RESULT_OK) {
-                refreshSwitches()
+                refreshStartBtn()
             }
             if (resultCode == RESULT_CANCELED) {
                 Log.d(TAG,"RC_HANDLE_ACCESSIBILITY cancel")
-                refreshSwitches()
+                refreshStartBtn()
 
                 if(!binding.accessibilitySwitch.isChecked)
                     Toast.makeText(this,"You need to activate the \"Blink to scroll\" service to use this application.",Toast.LENGTH_LONG).show()
             }
         }
         else if(requestCode == RC_HANDLE_SETTINGS) {
-            refreshSwitches()
+            refreshStartBtn()
         }
     } //onActivityResult
 
@@ -243,11 +244,30 @@ class MainActivity : AppCompatActivity(), View.OnClickListener, CompoundButton.O
         ) == PackageManager.PERMISSION_GRANTED
         binding.accessibilitySwitch.isChecked = isAccessServiceEnabled(
                 this,
-                FloatingView::class.java
+                AutoService::class.java
         )
 
         binding.appearOnTopSwitch.setOnCheckedChangeListener(this)
         binding.cameraSwitch.setOnCheckedChangeListener(this)
         binding.accessibilitySwitch.setOnCheckedChangeListener(this)
     }
+
+    private fun checkPermissions() : Boolean {
+        refreshSwitches()
+        return binding.appearOnTopSwitch.isChecked  && binding.cameraSwitch.isChecked && binding.accessibilitySwitch.isChecked
+    }
+
+    private fun refreshStartBtn() {
+
+        if(checkPermissions()) {
+            binding.startFloat.text = "Start"
+            binding.startFloat.isEnabled = true
+        }
+        else
+        {
+            binding.startFloat.text = "Start"
+            binding.startFloat.isEnabled = false
+        }
+
+    }
 }

app/src/main/java/com/github/facecommands/camera/CameraSourcePreview.java

@@ -15,14 +15,18 @@
  */
 package com.github.facecommands.camera;
 
+import android.Manifest;
 import android.content.Context;
+import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.SurfaceHolder;
 import android.view.SurfaceView;
 import android.view.ViewGroup;
 
+import androidx.core.app.ActivityCompat;
+
 import com.google.android.gms.common.images.Size;
 import com.google.android.gms.vision.CameraSource;
 

app/src/main/java/com/github/facecommands/camera/GraphicOverlay.java

@@ -17,6 +17,7 @@
 
 import android.content.Context;
 import android.graphics.Canvas;
+import android.graphics.Color;
 import android.util.AttributeSet;
 import android.view.View;
 
@@ -51,7 +52,7 @@ public class GraphicOverlay extends View {
     private float mHeightScaleFactor = 1.0f;
     private int mFacing = CameraSource.CAMERA_FACING_BACK;
     private Set<Graphic> mGraphics = new HashSet<>();
-
+    private static final int BACKGROUND = Color.TRANSPARENT;
     /**
      * Base class for a custom graphics object to be rendered within the graphic overlay.  Subclass
      * this and implement the {@link Graphic#draw(Canvas)} method to define the
@@ -128,6 +129,7 @@ public GraphicOverlay(Context context, AttributeSet attrs) {
     public void clear() {
         synchronized (mLock) {
             mGraphics.clear();
+
         }
         postInvalidate();
     }
@@ -173,6 +175,8 @@ protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);
 
         synchronized (mLock) {
+            canvas.drawColor(BACKGROUND);
+
             if ((mPreviewWidth != 0) && (mPreviewHeight != 0)) {
                 mWidthScaleFactor = (float) canvas.getWidth() / (float) mPreviewWidth;
                 mHeightScaleFactor = (float) canvas.getHeight() / (float) mPreviewHeight;
@@ -181,6 +185,9 @@ protected void onDraw(Canvas canvas) {
             for (Graphic graphic : mGraphics) {
                 graphic.draw(canvas);
             }
+
+
+            //setBackgroundColor(Color.TRANSPARENT);
         }
     }
 }