Add OSS Licenses Plugin to Display Open Source Licenses (#4022)

### Commit Message
- Integrated Google OSS Licenses Plugin to display the licenses of third-party libraries used in the app.
- Added the plugin to app-level Gradle file and included the required dependencies.
- Created a pre-built activity (`OssLicensesMenuActivity`) to show the licenses, accessible via a button/menu.
- Verified the implementation, ensuring the licenses are displayed correctly.
- Tested on release builds to confirm functionality and compliance.

This implementation ensures transparency and complies with open-source license requirements.

V2rayNG/app/build.gradle.kts

@@ -1,6 +1,7 @@
 plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.kotlin.android)
+    id("com.google.android.gms.oss-licenses-plugin")
 }
 
 android {
@@ -145,4 +146,6 @@ dependencies {
     androidTestImplementation(libs.androidx.espresso.core)
     testImplementation(libs.org.mockito.mockito.inline)
     testImplementation(libs.mockito.kotlin)
+    // Oss Licenses
+    implementation(libs.play.services.oss.licenses)
 }

V2rayNG/app/src/main/java/com/v2ray/ang/ui/AboutActivity.kt

@@ -20,6 +20,8 @@ import com.v2ray.ang.util.ZipUtil
 import java.io.File
 import java.text.SimpleDateFormat
 import java.util.Locale
+import com.google.android.gms.oss.licenses.OssLicensesMenuActivity
+
 
 class AboutActivity : BaseActivity() {
     private val binding by lazy { ActivityAboutBinding.inflate(layoutInflater) }
@@ -87,6 +89,9 @@ class AboutActivity : BaseActivity() {
         binding.layoutFeedback.setOnClickListener {
             Utils.openUri(this, AppConfig.v2rayNGIssues)
         }
+        binding.layoutOssLicenses.setOnClickListener{
+            startActivity(Intent(this, OssLicensesMenuActivity::class.java))
+        }
 
         binding.layoutTgChannel.setOnClickListener {
             Utils.openUri(this, AppConfig.TgChannelUrl)

V2rayNG/app/src/main/res/drawable/license_24px.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M480,520Q430,520 395,485Q360,450 360,400Q360,350 395,315Q430,280 480,280Q530,280 565,315Q600,350 600,400Q600,450 565,485Q530,520 480,520ZM240,920L240,611Q202,569 181,515Q160,461 160,400Q160,266 253,173Q346,80 480,80Q614,80 707,173Q800,266 800,400Q800,461 779,515Q758,569 720,611L720,920L480,840L240,920ZM480,640Q580,640 650,570Q720,500 720,400Q720,300 650,230Q580,160 480,160Q380,160 310,230Q240,300 240,400Q240,500 310,570Q380,640 480,640ZM320,801L480,760L640,801L640,677Q605,697 564.5,708.5Q524,720 480,720Q436,720 395.5,708.5Q355,697 320,677L320,801ZM480,739L480,739Q480,739 480,739Q480,739 480,739Q480,739 480,739Q480,739 480,739L480,739L480,739Z"/>
+</vector>

V2rayNG/app/src/main/res/layout/activity_about.xml

@@ -135,6 +135,30 @@
                     android:textAppearance="@style/TextAppearance.AppCompat.Subhead" />
             </LinearLayout>
 
+            <LinearLayout
+                android:id="@+id/layout_oss_licenses"
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/server_height"
+                android:background="?attr/selectableItemBackground"
+                android:clickable="true"
+                android:focusable="true"
+                android:gravity="center|start"
+                android:orientation="horizontal"
+                android:padding="@dimen/padding">
+
+                <ImageView
+                    android:layout_width="@dimen/png_height"
+                    android:layout_height="@dimen/png_height"
+                    app:srcCompat="@drawable/license_24px" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:paddingStart="@dimen/padding_start"
+                    android:text="@string/title_oss_license"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Subhead" />
+            </LinearLayout>
+
             <LinearLayout
                 android:id="@+id/layout_feedback"
                 android:layout_width="match_parent"

V2rayNG/app/src/main/res/values/strings.xml

@@ -214,6 +214,7 @@
     <string name="title_privacy_policy">Privacy policy</string>
     <string name="title_about">About</string>
     <string name="title_source_code">Source code</string>
+    <string name="title_oss_license">Open Source licenses</string>
     <string name="title_tg_channel">Telegram channel</string>
     <string name="title_configuration_backup">Backup configuration</string>
     <string name="summary_configuration_backup">Storage location: [%s], The backup will be cleared after uninstalling the app or clearing the storage</string>

V2rayNG/build.gradle.kts

@@ -3,4 +3,11 @@ plugins {
     alias(libs.plugins.android.application) apply false
     alias(libs.plugins.android.library) apply false
     alias(libs.plugins.kotlin.android) apply false
-}
+}
+
+buildscript {
+    dependencies {
+        classpath(libs.oss.licenses.plugin)
+    }
+}
+

V2rayNG/gradle/libs.versions.toml

@@ -11,6 +11,8 @@ activity = "1.9.3"
 constraintlayout = "2.2.0"
 mmkvStatic = "1.3.9"
 gson = "2.11.0"
+ossLicensesPlugin = "0.10.6"
+playServicesOssLicenses = "17.1.0"
 rxjava = "3.1.9"
 rxandroid = "3.0.2"
 rxpermissions = "0.12"
@@ -36,6 +38,8 @@ androidx-activity = { group = "androidx.activity", name = "activity", version.re
 androidx-constraintlayout = { group = "androidx.constraintlayout", name = "constraintlayout", version.ref = "constraintlayout" }
 mmkv-static = { module = "com.tencent:mmkv-static", version.ref = "mmkvStatic" }
 gson = { module = "com.google.code.gson:gson", version.ref = "gson" }
+oss-licenses-plugin = { module = "com.google.android.gms:oss-licenses-plugin", version.ref = "ossLicensesPlugin" }
+play-services-oss-licenses = { module = "com.google.android.gms:play-services-oss-licenses", version.ref = "playServicesOssLicenses" }
 rxjava = { module = "io.reactivex.rxjava3:rxjava", version.ref = "rxjava" }
 rxandroid = { module = "io.reactivex.rxjava3:rxandroid", version.ref = "rxandroid" }
 rxpermissions = { module = "com.github.tbruyelle:rxpermissions", version.ref = "rxpermissions" }