Support hiding app from Recents screen (#663)

app/src/main/java/com/github/kr328/clash/BaseActivity.kt

@@ -1,11 +1,13 @@
 package com.github.kr328.clash
 
+import android.app.ActivityManager
 import android.content.res.Configuration
 import android.os.Build
 import android.os.Bundle
 import android.view.View
 import androidx.activity.result.contract.ActivityResultContract
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.getSystemService
 import com.github.kr328.clash.common.compat.isAllowForceDarkCompat
 import com.github.kr328.clash.common.compat.isLightNavigationBarCompat
 import com.github.kr328.clash.common.compat.isLightStatusBarsCompat
@@ -88,6 +90,11 @@ abstract class BaseActivity<D : Design<*>> : AppCompatActivity(),
         super.onCreate(savedInstanceState)
         applyDayNight()
 
+        // Apply excludeFromRecents setting to all app tasks.
+        checkNotNull(getSystemService<ActivityManager>()).appTasks.forEach { task ->
+            task.setExcludeFromRecents(uiStore.hideFromRecents)
+        }
+
         launch {
             main()
         }

design/src/main/java/com/github/kr328/clash/design/AppSettingsDesign.kt

@@ -77,6 +77,17 @@ class AppSettingsDesign(
                 }
             }
 
+            switch(
+                value = uiStore::hideFromRecents,
+                icon = R.drawable.ic_baseline_stack,
+                title = R.string.hide_from_recents_title,
+                summary = R.string.hide_from_recents_desc,
+            ) {
+                listener = OnChangedListener {
+                    requests.trySend(Request.ReCreateAllActivities)
+                }
+            }
+
             category(R.string.service)
 
             switch(

design/src/main/java/com/github/kr328/clash/design/store/UiStore.kt

@@ -30,6 +30,11 @@ class UiStore(context: Context) {
         defaultValue = false
     )
 
+    var hideFromRecents: Boolean by store.boolean(
+        key = "hide_from_recents",
+        defaultValue = false,
+    )
+
     var proxyExcludeNotSelectable by store.boolean(
         key = "proxy_exclude_not_selectable",
         defaultValue = false,

design/src/main/res/drawable/ic_baseline_stack.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="?attr/colorControlNormal"
+    android:viewportWidth="1024"
+    android:viewportHeight="1024">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M1024,320 L512,64 0,320l512,256L1024,320zM512,149 L854,320 512,491 170,320 512,149zM921.4,460.7 L1024,512 512,768 0,512 102.6,460.7 512,665.4ZM921.4,652.7 L1024,704 512,960 0,704 102.6,652.7 512,857.4Z" />
+</vector>

design/src/main/res/values-zh/strings.xml

@@ -39,6 +39,8 @@
     <string name="global_mode">全局模式</string>
     <string name="hide_app_icon_title">隐藏应用图标</string>
     <string name="hide_app_icon_desc">可以在拨号盘输入 *#*#252746382#*#* 打开应用</string>
+    <string name="hide_from_recents_title">从最近任务隐藏</string>
+    <string name="hide_from_recents_desc">在最近任务中隐藏应用</string>
     <string name="history">历史</string>
     <string name="import_from_file">从文件导入</string>
     <string name="import_from_url">从 URL 导入</string>

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

@@ -346,6 +346,8 @@
 
     <string name="hide_app_icon_title">Hide App Icon</string>
     <string name="hide_app_icon_desc">You can dial *#*#252746382#*#* to open this App</string>
+    <string name="hide_from_recents_title">Hide from Recents</string>
+    <string name="hide_from_recents_desc">Hide app from the Recent apps screen</string>
     <string name="import_from_qr_no_permission">Camera access is restricted. Please enable it in Settings.</string>
     <string name="import_from_qr_exception">An unhandled system exception occurred.</string>
 </resources>