使Activity在最前端透明顯示

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 5892d87b..f2d01a9 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -3408,6 +3408,9 @@
         <activity
             android:name=".system.UpdateOTAImage"
             android:label="@string/ota_image_update"
+            android:excludeFromRecents="true"
+            android:exported="true"
+            android:theme="@style/ActivityTranslucent"
             android:configChanges="keyboardHidden|orientation|screenSize">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -3432,6 +3435,11 @@
             android:enabled="true"
             android:excludeFromRecents="true">
         </activity>
+        <activity android:name=".system.UpdateRebootDialog"
+            android:theme="@*android:style/Theme.DeviceDefault.Settings.Dialog"
+            android:enabled="true"
+            android:excludeFromRecents="true">
+        </activity>
         <!-- This is the longest AndroidManifest.xml ever. -->
     </application>
 </manifest>
diff --git a/res/values/colors.xml b/res/values/colors.xml
index 3e80ab4..7ec4357 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -116,4 +116,5 @@
     <!-- Suggestion/condition colors -->
     <color name="suggestion_condition_background">#f2f2f2</color>
     <color name="condition_card_background">#f8f8f8</color>
+    <color name="translucent">#01000000</color>
 </resources>
diff --git a/res/values/styles.xml b/res/values/styles.xml
index b7ff823..232b90c 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -500,4 +500,8 @@
         <item name="android:layout_height">wrap_content</item>
         <item name="android:orientation">vertical</item>
     </style>
+    <style name="ActivityTranslucent" parent="Theme.AppCompat.Light.NoActionBar">
+        <item name="android:windowBackground">@color/translucent</item>
+        <item name="android:windowIsTranslucent">true</item>
+    </style>
 </resources>
diff --git a/src/com/android/settings/system/UpdateOTAImage.java b/src/com/android/settings/system/UpdateOTAImage.java
index 262c5d6..6ab0ea0 100644