Accessibility Service Overlay MVP

app/src/main/AndroidManifest.xml

@@ -153,5 +153,15 @@
                 <action android:name="android.service.quicksettings.action.QS_TILE" />
             </intent-filter>
         </service>
+
+        <service
+            android:name=".service.AccessibilityFilterService"
+            android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE"
+            android:label="@string/overlay_accessibility_service_label"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.accessibilityservice.AccessibilityService" />
+            </intent-filter>
+        </service>
     </application>
 </manifest>

app/src/main/java/com/jmstudios/redmoon/CommandAnimatorListener.kt

@@ -25,11 +25,14 @@
 package com.jmstudios.redmoon
 
 import android.animation.Animator
+import android.app.Service
+import com.jmstudios.redmoon.service.AccessibilityFilterService
 import com.jmstudios.redmoon.service.FilterService
 
 class CommandAnimatorListener(
-        private val cmd: Command,
-        private val svc: FilterService)
+    private val cmd: Command,
+    private val svc: FilterService,
+)
     : Animator.AnimatorListener {
 
     override fun onAnimationStart (a: Animator?) = cmd.onAnimationStart (svc)

app/src/main/java/com/jmstudios/redmoon/Config.kt

@@ -203,6 +203,8 @@ object Config : Preferences(appContext) {
         }
 
     var useRoot by BooleanPreference(R.string.pref_key_use_root, false)
+
+    var useAccessibilityService by BooleanPreference(R.string.pref_key_use_accessibility_service, false)
     //endregion
 
     //region application

app/src/main/java/com/jmstudios/redmoon/EventBus.kt

@@ -38,4 +38,6 @@ class overlayPermissionDenied  : Event
 class locationAccessDenied     : Event
 class changeBrightnessDenied   : Event
 
+class accessibilityServiceCommand(val command: Command) : Event
+
 data class locationService(val isSearching: Boolean, val isRunning: Boolean = true) : Event

app/src/main/java/com/jmstudios/redmoon/fragment/SettingsFragment.kt

@@ -5,7 +5,9 @@
  */
 package com.jmstudios.redmoon.fragment
 
+import android.content.Intent
 import android.os.Bundle
+import android.provider.Settings
 import android.view.ViewGroup
 import android.widget.TextView
 import android.widget.Toast
@@ -57,6 +59,9 @@ class SettingsFragment : PreferenceFragmentCompat() {
     private val rootPref: SwitchPreference
         get() = pref(R.string.pref_key_use_root) as SwitchPreference
 
+    private val accessibilityServicePref: SwitchPreference
+        get() = pref(R.string.pref_key_use_accessibility_service) as SwitchPreference
+
     private var mSnackbar: Snackbar? = null
 
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
@@ -121,6 +126,26 @@ class SettingsFragment : PreferenceFragmentCompat() {
             return@setOnPreferenceChangeListener true
         }
 
+        accessibilityServicePref.setOnPreferenceChangeListener { _, newValue ->
+            // Make sure root is available before enabling
+            if (newValue as Boolean) {
+                val prefString = Settings.Secure.getString(context?.contentResolver, Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES)
+                Log.i("FOO 20 FOO 10 ${context?.contentResolver } $prefString")
+                if(prefString == null || !prefString.contains("com.jmstudios.redmoon.service.AccessibilityFilterService")) {
+                    startActivity(Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS));
+                    return@setOnPreferenceChangeListener false
+                }
+            }
+            if (filterIsOn) {
+                // It would be better to toggle back on again using the new mode but it's more work
+                // to add that, since the filter service needs to restart, so we need to wait until
+                // the fade-out finishes to start again. Or maybe better, the filter service could
+                // listen for this setting changing and automatically toggle itself. But this works.
+                Command.toggle(on = false)
+            }
+            return@setOnPreferenceChangeListener true
+        }
+
         updatePrefs()
     }
 

app/src/main/java/com/jmstudios/redmoon/service/AccessibilityFilterService.kt

@@ -0,0 +1,57 @@
+package com.jmstudios.redmoon.service
+
+import android.accessibilityservice.AccessibilityService
+import android.animation.ValueAnimator
+import android.graphics.PixelFormat
+import android.view.View
+import android.view.WindowManager
+import android.view.accessibility.AccessibilityEvent
+import com.jmstudios.redmoon.*
+import com.jmstudios.redmoon.helper.Logger
+import org.greenrobot.eventbus.Subscribe
+
+
+class AccessibilityFilterService : AccessibilityService() {
+    lateinit var mFilter: Overlay
+
+    override fun onAccessibilityEvent(event: AccessibilityEvent) {}
+    override fun onInterrupt() {}
+
+    override fun onServiceConnected() {
+        instance = this;
+        enabled = true;
+        mFilter = Overlay(applicationContext)
+        val lp = WindowManager.LayoutParams().apply {
+            type = WindowManager.LayoutParams.TYPE_ACCESSIBILITY_OVERLAY
+            format = PixelFormat.TRANSLUCENT
+            flags = WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE.or(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE)
+        }
+        (getSystemService(WINDOW_SERVICE) as WindowManager).addView(mFilter, lp)
+
+        mFilter.visibility = View.GONE;
+
+        EventBus.register(this)
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        EventBus.unregister(this);
+        enabled = false;
+    }
+
+    @Subscribe
+    fun turnOnOrOff(cmd: accessibilityServiceCommand) {
+        Log.i("${cmd.command}")
+        mFilter.setBackgroundColor(activeProfile.filterColor)
+        mFilter.visibility = if (cmd.command.turnOn) View.VISIBLE else View.GONE
+    }
+
+    companion object : Logger() {
+        var enabled = false;
+        lateinit var instance: AccessibilityFilterService
+    }
+
+//    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+//        return super.onStartCommand(intent, flags, startId)
+//    }
+}

app/src/main/java/com/jmstudios/redmoon/service/FilterService.kt

@@ -30,26 +30,13 @@ import android.app.Service
 import android.content.Intent
 import android.os.IBinder
 import android.widget.Toast
+import com.jmstudios.redmoon.*
 import java.util.concurrent.Executors
 
-import com.jmstudios.redmoon.activeProfile
-import com.jmstudios.redmoon.Command
-import com.jmstudios.redmoon.CommandAnimatorListener
-import com.jmstudios.redmoon.Config
-import com.jmstudios.redmoon.EventBus
-import com.jmstudios.redmoon.Filter
-import com.jmstudios.redmoon.filterIsOn
 import com.jmstudios.redmoon.filter.surfaceflinger.SurfaceFlinger
 import com.jmstudios.redmoon.helper.Logger
 import com.jmstudios.redmoon.helper.Permission
 import com.jmstudios.redmoon.manager.CurrentAppMonitor
-import com.jmstudios.redmoon.Notification
-import com.jmstudios.redmoon.Overlay
-import com.jmstudios.redmoon.overlayPermissionDenied
-import com.jmstudios.redmoon.Profile
-import com.jmstudios.redmoon.ProfileEvaluator
-import com.jmstudios.redmoon.R
-import com.jmstudios.redmoon.secureSuspendChanged
 
 import org.greenrobot.eventbus.Subscribe
 import com.topjohnwu.superuser.Shell
@@ -107,6 +94,11 @@ class FilterService : Service() {
                 Config.useRoot = false;
                 stopForeground(false)
             }
+        } else if (Config.useAccessibilityService) {
+            EventBus.post(accessibilityServiceCommand(Command.getCommand(intent)))
+            filterIsOn = Command.getCommand(intent).turnOn
+            mCurrentAppMonitor.monitoring = Command.getCommand(intent).turnOn && Config.secureSuspend
+            Log.i("$filterIsOn")
         } else {
             if (Permission.Overlay.isGranted) {
                 fadeInOrOut()
@@ -138,12 +130,16 @@ class FilterService : Service() {
             filterIsOn = false
             mCurrentAppMonitor.monitoring = false
         }
+        if(Config.useAccessibilityService) {
+            EventBus.post(accessibilityServiceCommand(Command.OFF))
+        }
         mFilter.onDestroy()
         executor.shutdownNow()
         super.onDestroy()
     }
 
     @Subscribe fun onProfileUpdated(profile: Profile) {
+        Log.i("onProfileUpdated")
         mFilter.profile = profile
         startForeground(NOTIFICATION_ID, mNotification.build(true))
     }

app/src/main/res/values/donottranslate.xml

@@ -26,6 +26,7 @@
 <resources>
   <!-- Preference Keys -->
   <string name="pref_key_use_root" translatable="false">pref_key_use_root</string>
+  <string name="pref_key_use_accessibility_service" translatable="false">pref_key_use_accessibility_service</string>
   <string name="pref_key_profile_spinner" translatable="false">pref_key_profile_spinner</string>
   <string name="pref_key_dim" translatable="false">pref_key_shades_dim_level</string>
   <string name="pref_key_intensity" translatable="false">pref_key_shades_intensity_level</string>

app/src/main/res/values/strings.xml

@@ -202,4 +202,7 @@
     <!-- Notification channel descriptions -->
     <string name="notification_channel_overlay_name">Overlay Control</string>
     <string name="notification_channel_overlay_description">The persistent overlay control notification</string>
+    <string name="overlay_accessibility_service_label">Red Moon Overlay</string>
+    <string name="pref_title_use_accessibility_service">Use Accessibiltiy Service</string>
+    <string name="pref_summary_use_accessibility_service">Cover the home screen (Android 12+) and status/navigation bars (Android 10+)</string>
 </resources>

app/src/main/res/xml/settings.xml

@@ -63,6 +63,15 @@
             android:summary="@string/pref_summary_use_root"
             />
 
+        <SwitchPreference
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:defaultValue="false"
+            android:key="@string/pref_key_use_accessibility_service"
+            android:title="@string/pref_title_use_accessibility_service"
+            android:summary="@string/pref_summary_use_accessibility_service"
+            />
+
         <ListPreference
             android:key="@string/pref_key_button_backlight"
             android:title="@string/pref_title_button_backlight"