Merge pull request #529 from Baseflow/system_alert_window

Added 'SYSTEM_ALERT_WINDOW' permission

permission_handler/CHANGELOG.md

+## 7.1.0
+
+* Added support for the "SYSTEM_ALERT_WINDOW" permission on Android.
+
 ## 7.0.0
 
 This release contains the following **breaking changes**: 

permission_handler/android/src/main/java/com/baseflow/permissionhandler/MethodCallHandlerImpl.java

@@ -58,13 +58,7 @@ final class MethodCallHandlerImpl implements MethodChannel.MethodCallHandler {
                 permissionManager.checkPermissionStatus(
                         permission,
                         applicationContext,
-						activity,
-                        result::success,
-                        (String errorCode, String errorDescription) -> result.error(
-                                errorCode,
-                                errorDescription,
-                                null));
-
+                        result::success);
                 break;
             }
             case "requestPermissions":

permission_handler/android/src/main/java/com/baseflow/permissionhandler/PermissionConstants.java

@@ -10,6 +10,7 @@ final class PermissionConstants {
     static final int PERMISSION_CODE = 24;
     static final int PERMISSION_CODE_IGNORE_BATTERY_OPTIMIZATIONS = 209;
     static final int PERMISSION_CODE_MANAGE_EXTERNAL_STORAGE = 210;
+    static final int PERMISSION_CODE_SYSTEM_ALERT_WINDOW = 211;
 
     //PERMISSION_GROUP
     static final int PERMISSION_GROUP_CALENDAR = 0;
@@ -35,6 +36,7 @@ final class PermissionConstants {
     static final int PERMISSION_GROUP_UNKNOWN = 20;
     static final int PERMISSION_GROUP_BLUETOOTH = 21;
     static final int PERMISSION_GROUP_MANAGE_EXTERNAL_STORAGE = 22;
+    static final int PERMISSION_GROUP_SYSTEM_ALERT_WINDOW = 23;
 
     @Retention(RetentionPolicy.SOURCE)
     @IntDef({
@@ -59,7 +61,8 @@ final class PermissionConstants {
             PERMISSION_GROUP_ACTIVITY_RECOGNITION,
             PERMISSION_GROUP_UNKNOWN,
             PERMISSION_GROUP_BLUETOOTH,
-            PERMISSION_GROUP_MANAGE_EXTERNAL_STORAGE
+            PERMISSION_GROUP_MANAGE_EXTERNAL_STORAGE,
+            PERMISSION_GROUP_SYSTEM_ALERT_WINDOW
     })
     @interface PermissionGroup {
     }
@@ -95,4 +98,4 @@ final class PermissionConstants {
     })
     @interface ServiceStatus {
     }
-}
+}
\ No newline at end of file

permission_handler/android/src/main/java/com/baseflow/permissionhandler/PermissionManager.java

@@ -26,9 +26,6 @@ import io.flutter.plugin.common.PluginRegistry;
 final class PermissionManager implements PluginRegistry.ActivityResultListener, PluginRegistry.RequestPermissionsResultListener {
 
     @Nullable
-    private ErrorCallback errorCallback;
-
-    @Nullable
     private RequestPermissionsSuccessCallback successCallback;
 
     @Nullable
@@ -38,7 +35,9 @@ final class PermissionManager implements PluginRegistry.ActivityResultListener,
 
     @Override
     public boolean onActivityResult(int requestCode, int resultCode, Intent data) {
-        if (requestCode != PermissionConstants.PERMISSION_CODE_IGNORE_BATTERY_OPTIMIZATIONS && requestCode != PermissionConstants.PERMISSION_CODE_MANAGE_EXTERNAL_STORAGE) {
+        if (requestCode != PermissionConstants.PERMISSION_CODE_IGNORE_BATTERY_OPTIMIZATIONS &&
+                requestCode != PermissionConstants.PERMISSION_CODE_MANAGE_EXTERNAL_STORAGE &&
+                requestCode != PermissionConstants.PERMISSION_CODE_SYSTEM_ALERT_WINDOW) {
             return false;
         }
 
@@ -55,6 +54,15 @@ final class PermissionManager implements PluginRegistry.ActivityResultListener,
                     ? PermissionConstants.PERMISSION_STATUS_GRANTED
                     : PermissionConstants.PERMISSION_STATUS_DENIED;
             permission = PermissionConstants.PERMISSION_GROUP_MANAGE_EXTERNAL_STORAGE;
+        } else if (requestCode == PermissionConstants.PERMISSION_CODE_SYSTEM_ALERT_WINDOW) {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                status = Settings.canDrawOverlays(activity)
+                        ? PermissionConstants.PERMISSION_STATUS_GRANTED
+                        : PermissionConstants.PERMISSION_STATUS_DENIED;
+                permission = PermissionConstants.PERMISSION_GROUP_SYSTEM_ALERT_WINDOW;
+            } else {
+                return false;
+            }
         } else {
             return false;
         }
@@ -154,14 +162,11 @@ final class PermissionManager implements PluginRegistry.ActivityResultListener,
     void checkPermissionStatus(
             @PermissionConstants.PermissionGroup int permission,
             Context context,
-            Activity activity,
-            CheckPermissionsSuccessCallback successCallback,
-            ErrorCallback errorCallback) {
+            CheckPermissionsSuccessCallback successCallback) {
 
         successCallback.onSuccess(determinePermissionStatus(
                 permission,
-                context,
-                activity));
+                context));
     }
 
     void requestPermissions(
@@ -185,14 +190,13 @@ final class PermissionManager implements PluginRegistry.ActivityResultListener,
             return;
         }
 
-        this.errorCallback = errorCallback;
         this.successCallback = successCallback;
         this.activity = activity;
         this.requestResults = new HashMap<>();
 
         ArrayList<String> permissionsToRequest = new ArrayList<>();
         for (Integer permission : permissions) {
-            @PermissionConstants.PermissionStatus final int permissionStatus = determinePermissionStatus(permission, activity, activity);
+            @PermissionConstants.PermissionStatus final int permissionStatus = determinePermissionStatus(permission, activity);
             if (permissionStatus == PermissionConstants.PERMISSION_STATUS_GRANTED) {
                 if (!requestResults.containsKey(permission)) {
                     requestResults.put(permission, PermissionConstants.PERMISSION_STATUS_GRANTED);
@@ -233,6 +237,10 @@ final class PermissionManager implements PluginRegistry.ActivityResultListener,
                 executeIntent(
                         Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION,
                         PermissionConstants.PERMISSION_CODE_MANAGE_EXTERNAL_STORAGE);
+            } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && permission == PermissionConstants.PERMISSION_GROUP_SYSTEM_ALERT_WINDOW) {
+                executeIntent(
+                        Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
+                        PermissionConstants.PERMISSION_CODE_SYSTEM_ALERT_WINDOW);
             } else {
                 permissionsToRequest.addAll(names);
             }
@@ -257,8 +265,7 @@ final class PermissionManager implements PluginRegistry.ActivityResultListener,
     @PermissionConstants.PermissionStatus
     private int determinePermissionStatus(
             @PermissionConstants.PermissionGroup int permission,
-            Context context,
-            @Nullable Activity activity) {
+            Context context) {
 
         if (permission == PermissionConstants.PERMISSION_GROUP_NOTIFICATION) {
             return checkNotificationPermissionStatus(context);
@@ -328,6 +335,14 @@ final class PermissionManager implements PluginRegistry.ActivityResultListener,
                             : PermissionConstants.PERMISSION_STATUS_DENIED;
                 }
 
+                if (permission == PermissionConstants.PERMISSION_GROUP_SYSTEM_ALERT_WINDOW) {
+                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                        return Settings.canDrawOverlays(context)
+                                ? PermissionConstants.PERMISSION_STATUS_GRANTED
+                                : PermissionConstants.PERMISSION_STATUS_DENIED;
+                    }
+                }
+
                 final int permissionStatus = ContextCompat.checkSelfPermission(context, name);
                 if (permissionStatus != PackageManager.PERMISSION_GRANTED) {
                     return PermissionConstants.PERMISSION_STATUS_DENIED;

permission_handler/android/src/main/java/com/baseflow/permissionhandler/PermissionUtils.java

@@ -63,6 +63,8 @@ public class PermissionUtils {
                 return PermissionConstants.PERMISSION_GROUP_ACTIVITY_RECOGNITION;
             case Manifest.permission.MANAGE_EXTERNAL_STORAGE:
                 return PermissionConstants.PERMISSION_GROUP_MANAGE_EXTERNAL_STORAGE;
+            case Manifest.permission.SYSTEM_ALERT_WINDOW:
+                return PermissionConstants.PERMISSION_GROUP_SYSTEM_ALERT_WINDOW;
             default:
                 return PermissionConstants.PERMISSION_GROUP_UNKNOWN;
         }
@@ -224,6 +226,11 @@ public class PermissionUtils {
                     permissionNames.add(Manifest.permission.MANAGE_EXTERNAL_STORAGE);
                 break;
 
+            case PermissionConstants.PERMISSION_GROUP_SYSTEM_ALERT_WINDOW:
+                if (hasPermissionInManifest(context, permissionNames, Manifest.permission.SYSTEM_ALERT_WINDOW ))
+                    permissionNames.add(Manifest.permission.SYSTEM_ALERT_WINDOW);
+                break;
+
             case PermissionConstants.PERMISSION_GROUP_NOTIFICATION:
             case PermissionConstants.PERMISSION_GROUP_MEDIA_LIBRARY:
             case PermissionConstants.PERMISSION_GROUP_PHOTOS:

permission_handler/example/android/app/src/main/AndroidManifest.xml

@@ -66,6 +66,9 @@
     <!-- Permissions options for the `manage external storage` group -->
     <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
 
+    <!-- Permissions options for the `system alert windows` group -->
+    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
+
     <application
         android:name="io.flutter.app.FlutterApplication"
         android:icon="@mipmap/ic_launcher"

permission_handler/ios/Classes/PermissionHandlerEnums.h

@@ -118,7 +118,8 @@ typedef NS_ENUM(int, PermissionGroup) {
     PermissionGroupActivityRecognition,
     PermissionGroupUnknown,
     PermissionGroupBluetooth,
-    PermissionGroupManageExternalStorage
+    PermissionGroupManageExternalStorage,
+    PermissionGroupSystemAlertWindow
 };
 
 typedef NS_ENUM(int, PermissionStatus) {

permission_handler/pubspec.yaml

 name: permission_handler
 description: Permission plugin for Flutter. This plugin provides a cross-platform (iOS, Android) API to request and check permissions.
-version: 7.0.0
+version: 7.1.0
 homepage: https://github.com/baseflowit/flutter-permission-handler
 
 flutter:
@@ -16,7 +16,7 @@ dependencies:
   flutter:
     sdk: flutter
   meta: ^1.3.0
-  permission_handler_platform_interface: ^3.2.0
+  permission_handler_platform_interface: ^3.3.0
 
 dev_dependencies:
   flutter_test: