diff --git a/app/src/main/java/com/osfans/trime/data/prefs/PreferenceDelegate.kt b/app/src/main/java/com/osfans/trime/data/prefs/PreferenceDelegate.kt
index ef02713ec2..4ffe6f46d1 100644
--- a/app/src/main/java/com/osfans/trime/data/prefs/PreferenceDelegate.kt
+++ b/app/src/main/java/com/osfans/trime/data/prefs/PreferenceDelegate.kt
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2024 Rime community
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package com.osfans.trime.data.prefs
 
 import android.content.SharedPreferences
diff --git a/app/src/main/java/com/osfans/trime/data/prefs/PreferenceDelegateOwner.kt b/app/src/main/java/com/osfans/trime/data/prefs/PreferenceDelegateOwner.kt
index 418b710aa1..2cfb125292 100644
--- a/app/src/main/java/com/osfans/trime/data/prefs/PreferenceDelegateOwner.kt
+++ b/app/src/main/java/com/osfans/trime/data/prefs/PreferenceDelegateOwner.kt
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2024 Rime community
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package com.osfans.trime.data.prefs
 
 import android.content.SharedPreferences
diff --git a/app/src/main/java/com/osfans/trime/util/Char.kt b/app/src/main/java/com/osfans/trime/util/Char.kt
index ece88f2c1e..a73ecf9c33 100644
--- a/app/src/main/java/com/osfans/trime/util/Char.kt
+++ b/app/src/main/java/com/osfans/trime/util/Char.kt
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2024 Rime community
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package com.osfans.trime.util
 
 @Suppress("NOTHING_TO_INLINE")
diff --git a/app/src/main/java/com/osfans/trime/util/Configuration.kt b/app/src/main/java/com/osfans/trime/util/Configuration.kt
index 0883d2c8d1..c865941520 100644
--- a/app/src/main/java/com/osfans/trime/util/Configuration.kt
+++ b/app/src/main/java/com/osfans/trime/util/Configuration.kt
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2024 Rime community
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package com.osfans.trime.util
 
 import android.content.res.Configuration
diff --git a/app/src/main/java/com/osfans/trime/util/Regex.kt b/app/src/main/java/com/osfans/trime/util/Regex.kt
index 2c3a1c1205..bea47e752e 100644
--- a/app/src/main/java/com/osfans/trime/util/Regex.kt
+++ b/app/src/main/java/com/osfans/trime/util/Regex.kt
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2024 Rime community
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package com.osfans.trime.util
 
 fun String.removeRegexSet(regexSet: Set<Regex>): String {
diff --git a/app/src/main/java/com/osfans/trime/util/Strings.kt b/app/src/main/java/com/osfans/trime/util/Strings.kt
index 8df6fbac58..1ed6f5a643 100644
--- a/app/src/main/java/com/osfans/trime/util/Strings.kt
+++ b/app/src/main/java/com/osfans/trime/util/Strings.kt
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2024 Rime community
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package com.osfans.trime.util
 
 val String.Companion.EMPTY: String
diff --git a/app/src/main/java/com/osfans/trime/util/Uri.kt b/app/src/main/java/com/osfans/trime/util/Uri.kt
index a6280e5b5b..da02875eb5 100644
--- a/app/src/main/java/com/osfans/trime/util/Uri.kt
+++ b/app/src/main/java/com/osfans/trime/util/Uri.kt
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2024 Rime community
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package com.osfans.trime.util
 
 import android.content.ContentResolver
diff --git a/app/src/main/res/xml/provider_paths.xml b/app/src/main/res/xml/provider_paths.xml
index b2af9c8958..24e7046808 100644
--- a/app/src/main/res/xml/provider_paths.xml
+++ b/app/src/main/res/xml/provider_paths.xml
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
+
+<!--
+SPDX-FileCopyrightText: 2024 Rime community
+
+SPDX-License-Identifier: GPL-3.0-or-later
+-->
+
 <paths>
     <files-path
         name="files_path"