Bring back semitransparent TV app via build variants (#2741)

This creates two variants for tv, freedom containing the original design, and google containing one matching Google's nonsense guideline. The former should be published on GitHub and elsewhere.

Revert "Revert "Revert "Revert "Revert "Make app fullscreen to match guidelines"""""

This reverts commit 0c67ac6.

tv/build.gradle.kts

@@ -9,7 +9,22 @@ plugins {
 
 setupApp()
 
-android.defaultConfig.applicationId = "com.github.shadowsocks.tv"
+android {
+    defaultConfig {
+        applicationId = "com.github.shadowsocks.tv"
+        buildConfigField("boolean", "FULLSCREEN", "false")
+    }
+    flavorDimensions("market")
+    productFlavors {
+        create("freedom") {
+            dimension("market")
+        }
+        create("google") {
+            dimension("market")
+            buildConfigField("boolean", "FULLSCREEN", "true")
+        }
+    }
+}
 
 dependencies {
     implementation("androidx.leanback:leanback-preference:1.1.0-rc01")

tv/src/freedom/res/values/styles.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.Shadowsocks.TV" parent="@style/Theme.Shadowsocks.TVBase">
+        <item name="android:backgroundDimEnabled">true</item>
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowBackground">@android:color/transparent</item>
+    </style>
+</resources>

tv/src/main/java/com/github/shadowsocks/tv/MainFragment.kt

@@ -62,8 +62,10 @@ class MainFragment : LeanbackSettingsFragmentCompat() {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        view.findViewById<View>(R.id.settings_preference_fragment_container).updateLayoutParams {
-            width = ViewGroup.LayoutParams.MATCH_PARENT
+        if (BuildConfig.FULLSCREEN) {
+            view.findViewById<View>(R.id.settings_preference_fragment_container).updateLayoutParams {
+                width = ViewGroup.LayoutParams.MATCH_PARENT
+            }
         }
     }
 }

tv/src/main/res/values/styles.xml

@@ -1,12 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <style name="Theme.Shadowsocks.TV" parent="@style/Theme.AppCompat.Leanback">
+    <style name="Theme.Shadowsocks.TVBase" parent="@style/Theme.AppCompat.Leanback">
         <item name="android:colorAccent">@color/material_accent_200</item>
         <item name="android:colorButtonNormal">@color/material_accent_200</item>
         <item name="android:colorPrimary">@color/color_primary</item>
         <item name="android:colorPrimaryDark">@color/color_primary_dark</item>
         <item name="preferenceTheme">@style/PreferenceThemeOverlay.Shadowsocks.TV</item>
     </style>
+    <style name="Theme.Shadowsocks.TV" parent="@style/Theme.Shadowsocks.TVBase" />
     <style name="PreferenceThemeOverlay.Shadowsocks.TV" parent="@style/PreferenceThemeOverlay.v14.Leanback">
         <item name="android:colorAccent">@color/material_accent_200</item>
         <item name="android:colorButtonNormal">@color/material_accent_200</item>