feat: add Android dialog mode for external downloads (#1362)

ui/flutter/android/app/src/main/AndroidManifest.xml

@@ -27,6 +27,30 @@
             android:theme="@style/LaunchTheme"
             android:windowSoftInputMode="adjustResize">
 
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+                android:name="io.flutter.embedding.android.NormalTheme"
+                android:resource="@style/NormalTheme" />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <activity
+            android:name=".CreateDialogActivity"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:excludeFromRecents="true"
+            android:exported="true"
+            android:finishOnTaskLaunch="true"
+            android:hardwareAccelerated="true"
+            android:launchMode="singleTask"
+            android:theme="@style/DialogLaunchTheme"
+            android:windowSoftInputMode="adjustResize">
+
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
                 <category android:name="android.intent.category.DEFAULT" />
@@ -83,18 +107,6 @@
                 <action android:name="android.intent.action.VIEW_DOWNLOADS" />
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
-
-            <!-- Specifies an Android theme to apply to this Activity as soon as
-                 the Android process has started. This theme is visible to the user
-                 while the Flutter UI initializes. After that, this theme continues
-                 to determine the Window background behind the Flutter UI. -->
-            <meta-data
-                android:name="io.flutter.embedding.android.NormalTheme"
-                android:resource="@style/NormalTheme" />
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.SEND" />
                 <action android:name="android.intent.action.SEND_MULTIPLE" />
@@ -102,6 +114,10 @@
                 <category android:name="android.intent.category.DEFAULT" />
                 <data android:mimeType="*/*" />
             </intent-filter>
+
+            <meta-data
+                android:name="io.flutter.embedding.android.NormalTheme"
+                android:resource="@style/DialogNormalTheme" />
         </activity>
 
         <!-- Add android:stopWithTask option only when necessary. -->
@@ -116,4 +132,4 @@
             android:name="flutterEmbedding"
             android:value="2" />
     </application>
-</manifest>
+</manifest>

ui/flutter/android/app/src/main/kotlin/com/gopeed/gopeed/CreateDialogActivity.kt

@@ -0,0 +1,31 @@
+package com.gopeed.gopeed
+
+import android.os.Bundle
+import android.view.Gravity
+import android.view.WindowManager
+import io.flutter.embedding.android.FlutterActivityLaunchConfigs
+
+class CreateDialogActivity : MainActivity() {
+    override fun isDialogMode(): Boolean = true
+
+    override fun getBackgroundMode(): FlutterActivityLaunchConfigs.BackgroundMode {
+        return FlutterActivityLaunchConfigs.BackgroundMode.transparent
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val metrics = resources.displayMetrics
+        val width = (metrics.widthPixels * 0.92f).toInt()
+        val maxHeight = (metrics.heightPixels * 0.62f).toInt()
+        val preferredHeight = (420 * metrics.density).toInt()
+
+        window.setGravity(Gravity.CENTER)
+        window.setDimAmount(0.28f)
+        window.setLayout(width, minOf(maxHeight, preferredHeight))
+
+        val attrs = window.attributes
+        attrs.flags = attrs.flags or WindowManager.LayoutParams.FLAG_DIM_BEHIND
+        window.attributes = attrs
+    }
+}

ui/flutter/android/app/src/main/kotlin/com/gopeed/gopeed/MainActivity.kt

@@ -7,9 +7,11 @@ import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.common.StandardMethodCodec
 
-class MainActivity : FlutterActivity() {
+open class MainActivity : FlutterActivity() {
     private val CHANNEL = "gopeed.com/libgopeed"
 
+    protected open fun isDialogMode(): Boolean = false
+
     override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
         super.configureFlutterEngine(flutterEngine)
         val taskQueue =
@@ -34,6 +36,9 @@ class MainActivity : FlutterActivity() {
                     Libgopeed.stop()
                     result.success(null)
                 }
+                "isDialogMode" -> {
+                    result.success(isDialogMode())
+                }
                 else -> {
                     result.notImplemented()
                 }

ui/flutter/android/app/src/main/res/values-night/styles.xml

@@ -15,4 +15,18 @@
     <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
+    <style name="DialogLaunchTheme" parent="@android:style/Theme.Translucent.NoTitleBar">
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowIsFloating">true</item>
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:backgroundDimEnabled">true</item>
+        <item name="android:windowNoTitle">true</item>
+    </style>
+    <style name="DialogNormalTheme" parent="@android:style/Theme.Translucent.NoTitleBar">
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowIsFloating">true</item>
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:backgroundDimEnabled">true</item>
+        <item name="android:windowNoTitle">true</item>
+    </style>
 </resources>

ui/flutter/android/app/src/main/res/values/styles.xml

@@ -15,4 +15,18 @@
     <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
+    <style name="DialogLaunchTheme" parent="@android:style/Theme.Translucent.NoTitleBar">
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowIsFloating">true</item>
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:backgroundDimEnabled">true</item>
+        <item name="android:windowNoTitle">true</item>
+    </style>
+    <style name="DialogNormalTheme" parent="@android:style/Theme.Translucent.NoTitleBar">
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowIsFloating">true</item>
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:backgroundDimEnabled">true</item>
+        <item name="android:windowNoTitle">true</item>
+    </style>
 </resources>