[Android] Removes handling of Flutter splash screen (#44047)

Fixes flutter/flutter#105173.

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style

Author: camsim99

ci/licenses_golden/licenses_flutter

@@ -2326,7 +2326,6 @@ ORIGIN: ../../../flutter/shell/platform/android/io/flutter/app/FlutterApplicatio
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/app/FlutterFragmentActivity.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/app/FlutterPlayStoreSplitApplication.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/app/FlutterPluginRegistry.java + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/DrawableSplashScreen.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/ExclusiveAppComponent.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterActivity.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterActivityAndFragmentDelegate.java + ../../../flutter/LICENSE
@@ -2337,7 +2336,6 @@ ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/Flu
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterFragmentActivity.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterImageView.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterPlayStoreSplitApplication.java + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterSplashView.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterSurfaceView.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterTextureView.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterView.java + ../../../flutter/LICENSE
@@ -2347,8 +2345,6 @@ ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/Key
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/KeyboardManager.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/KeyboardMap.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/RenderMode.java + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/SplashScreen.java + ../../../flutter/LICENSE
-ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/SplashScreenProvider.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/TransparencyMode.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/android/WindowInfoRepositoryCallbackAdapterWrapper.java + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/shell/platform/android/io/flutter/embedding/engine/FlutterEngine.java + ../../../flutter/LICENSE
@@ -5024,7 +5020,6 @@ FILE: ../../../flutter/shell/platform/android/io/flutter/app/FlutterFragmentActi
 FILE: ../../../flutter/shell/platform/android/io/flutter/app/FlutterPlayStoreSplitApplication.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/app/FlutterPluginRegistry.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/AndroidTouchProcessor.java
-FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/DrawableSplashScreen.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/ExclusiveAppComponent.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterActivity.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterActivityAndFragmentDelegate.java
@@ -5035,7 +5030,6 @@ FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/Flutt
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterFragmentActivity.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterImageView.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterPlayStoreSplitApplication.java
-FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterSplashView.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterSurfaceView.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterTextureView.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/FlutterView.java
@@ -5046,8 +5040,6 @@ FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/Keybo
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/KeyboardMap.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/MotionEventTracker.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/RenderMode.java
-FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/SplashScreen.java
-FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/SplashScreenProvider.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/TransparencyMode.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/android/WindowInfoRepositoryCallbackAdapterWrapper.java
 FILE: ../../../flutter/shell/platform/android/io/flutter/embedding/engine/FlutterEngine.java

shell/platform/android/BUILD.gn

@@ -180,7 +180,6 @@ android_java_sources = [
   "io/flutter/app/FlutterPlayStoreSplitApplication.java",
   "io/flutter/app/FlutterPluginRegistry.java",
   "io/flutter/embedding/android/AndroidTouchProcessor.java",
-  "io/flutter/embedding/android/DrawableSplashScreen.java",
   "io/flutter/embedding/android/ExclusiveAppComponent.java",
   "io/flutter/embedding/android/FlutterActivity.java",
   "io/flutter/embedding/android/FlutterActivityAndFragmentDelegate.java",
@@ -191,7 +190,6 @@ android_java_sources = [
   "io/flutter/embedding/android/FlutterFragmentActivity.java",
   "io/flutter/embedding/android/FlutterImageView.java",
   "io/flutter/embedding/android/FlutterPlayStoreSplitApplication.java",
-  "io/flutter/embedding/android/FlutterSplashView.java",
   "io/flutter/embedding/android/FlutterSurfaceView.java",
   "io/flutter/embedding/android/FlutterTextureView.java",
   "io/flutter/embedding/android/FlutterView.java",
@@ -202,8 +200,6 @@ android_java_sources = [
   "io/flutter/embedding/android/KeyboardMap.java",
   "io/flutter/embedding/android/MotionEventTracker.java",
   "io/flutter/embedding/android/RenderMode.java",
-  "io/flutter/embedding/android/SplashScreen.java",
-  "io/flutter/embedding/android/SplashScreenProvider.java",
   "io/flutter/embedding/android/TransparencyMode.java",
   "io/flutter/embedding/android/WindowInfoRepositoryCallbackAdapterWrapper.java",
   "io/flutter/embedding/engine/FlutterEngine.java",

shell/platform/android/io/flutter/embedding/android/DrawableSplashScreen.java

@@ -20,18 +20,15 @@
 import static io.flutter.embedding.android.FlutterActivityLaunchConfigs.HANDLE_DEEPLINKING_META_DATA_KEY;
 import static io.flutter.embedding.android.FlutterActivityLaunchConfigs.INITIAL_ROUTE_META_DATA_KEY;
 import static io.flutter.embedding.android.FlutterActivityLaunchConfigs.NORMAL_THEME_META_DATA_KEY;
-import static io.flutter.embedding.android.FlutterActivityLaunchConfigs.SPLASH_SCREEN_META_DATA_KEY;
 
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
-import android.content.res.Resources;
 import android.graphics.Color;
 import android.graphics.drawable.ColorDrawable;
-import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Bundle;
 import android.view.View;
@@ -42,7 +39,6 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
-import androidx.core.content.res.ResourcesCompat;
 import androidx.lifecycle.Lifecycle;
 import androidx.lifecycle.LifecycleOwner;
 import androidx.lifecycle.LifecycleRegistry;
@@ -69,7 +65,6 @@
  *
  * <ul>
  *   <li>Displays an Android launch screen.
- *   <li>Displays a Flutter splash screen.
  *   <li>Configures the status bar appearance.
  *   <li>Chooses the Dart execution app bundle path, entrypoint and entrypoint arguments.
  *   <li>Chooses Flutter's initial route.
@@ -167,7 +162,7 @@
  * FlutterView}. Using a {@link FlutterView} requires forwarding some calls from an {@code
  * Activity}, as well as forwarding lifecycle calls from an {@code Activity} or a {@code Fragment}.
  *
- * <p><strong>Launch Screen and Splash Screen</strong>
+ * <p><strong>Launch Screen</strong>
  *
  * <p>{@code FlutterActivity} supports the display of an Android "launch screen", which is displayed
  * while the Android application loads. It is only applicable if {@code FlutterActivity} is the
@@ -201,10 +196,6 @@
  * <p>With themes defined, and AndroidManifest.xml updated, Flutter displays the specified launch
  * screen until the Android application is initialized.
  *
- * <p>Flutter also requires initialization time. To specify a splash screen for Flutter
- * initialization, subclass {@code FlutterActivity} and override {@link #provideSplashScreen()}. See
- * {@link SplashScreen} for details on implementing a splash screen.
- *
  * <p><strong>Alternative Activity</strong> {@link FlutterFragmentActivity} is also available, which
  * is similar to {@code FlutterActivity} but it extends {@code FragmentActivity}. You should use
  * {@code FlutterActivity}, if possible, but if you need a {@code FragmentActivity} then you should
@@ -756,41 +747,6 @@ private void switchLaunchThemeForNormalTheme() {
     }
   }
 
-  @Nullable
-  @Override
-  public SplashScreen provideSplashScreen() {
-    Drawable manifestSplashDrawable = getSplashScreenFromManifest();
-    if (manifestSplashDrawable != null) {
-      return new DrawableSplashScreen(manifestSplashDrawable);
-    } else {
-      return null;
-    }
-  }
-
-  /**
-   * Returns a {@link Drawable} to be used as a splash screen as requested by meta-data in the
-   * {@code AndroidManifest.xml} file, or null if no such splash screen is requested.
-   *
-   * <p>See {@link FlutterActivityLaunchConfigs#SPLASH_SCREEN_META_DATA_KEY} for the meta-data key
-   * to be used in a manifest file.
-   */
-  @Nullable
-  private Drawable getSplashScreenFromManifest() {
-    try {
-      Bundle metaData = getMetaData();
-      int splashScreenId = metaData != null ? metaData.getInt(SPLASH_SCREEN_META_DATA_KEY) : 0;
-      return splashScreenId != 0
-          ? ResourcesCompat.getDrawable(getResources(), splashScreenId, getTheme())
-          : null;
-    } catch (Resources.NotFoundException e) {
-      Log.e(TAG, "Splash screen not found. Ensure the drawable exists and that it's valid.");
-      throw e;
-    } catch (PackageManager.NameNotFoundException e) {
-      // This is never expected to happen.
-      return null;
-    }
-  }
-
   /**
    * Sets this {@code Activity}'s {@code Window} background to be transparent, and hides the status
    * bar, if this {@code Activity}'s desired {@link BackgroundMode} is {@link

shell/platform/android/io/flutter/embedding/android/FlutterActivity.java

@@ -30,7 +30,6 @@
 import io.flutter.embedding.engine.dart.DartExecutor;
 import io.flutter.embedding.engine.renderer.FlutterUiDisplayListener;
 import io.flutter.plugin.platform.PlatformPlugin;
-import io.flutter.util.ViewUtils;
 import java.util.Arrays;
 import java.util.List;
 
@@ -344,9 +343,7 @@ private FlutterEngineGroup.Options addEntrypointOptions(FlutterEngineGroup.Optio
    * with Android tools, such as "Displayed" timing printed with `am start`.
    *
    * <p>Note that it should only be set to true when {@code Host#getRenderMode()} is {@code
-   * RenderMode.surface}. This parameter is also ignored, disabling the delay should the legacy
-   * {@code Host#provideSplashScreen()} be non-null. See <a
-   * href="https://flutter.dev/go/android-splash-migration">Android Splash Migration</a>.
+   * RenderMode.surface}.
    *
    * <p>This method:
    *
@@ -397,20 +394,6 @@ View onCreateView(
     flutterView.attachToFlutterEngine(flutterEngine);
     flutterView.setId(flutterViewId);
 
-    SplashScreen splashScreen = host.provideSplashScreen();
-
-    if (splashScreen != null) {
-      Log.w(
-          TAG,
-          "A splash screen was provided to Flutter, but this is deprecated. See"
-              + " flutter.dev/go/android-splash-migration for migration steps.");
-      FlutterSplashView flutterSplashView = new FlutterSplashView(host.getContext());
-      flutterSplashView.setId(ViewUtils.generateViewId(FLUTTER_SPLASH_VIEW_FALLBACK_ID));
-      flutterSplashView.displayFlutterViewWithSplash(flutterView, splashScreen);
-
-      return flutterSplashView;
-    }
-
     if (shouldDelayFirstAndroidViewDraw) {
       delayFirstAndroidViewDraw(flutterView);
     }
@@ -952,8 +935,7 @@ private void ensureAlive() {
    * FlutterActivityAndFragmentDelegate}.
    */
   /* package */ interface Host
-      extends SplashScreenProvider,
-          FlutterEngineProvider,
+      extends FlutterEngineProvider,
           FlutterEngineConfigurator,
           PlatformPlugin.PlatformPluginDelegate {
     /**
@@ -1070,9 +1052,6 @@ private void ensureAlive() {
      */
     ExclusiveAppComponent<Activity> getExclusiveAppComponent();
 
-    @Nullable
-    SplashScreen provideSplashScreen();
-
     /**
      * Returns the {@link io.flutter.embedding.engine.FlutterEngine} that should be rendered to a
      * {@link FlutterView}.

shell/platform/android/io/flutter/embedding/android/FlutterActivityAndFragmentDelegate.java

@@ -13,8 +13,6 @@ public class FlutterActivityLaunchConfigs {
   /* package */ static final String DART_ENTRYPOINT_META_DATA_KEY = "io.flutter.Entrypoint";
   /* package */ static final String DART_ENTRYPOINT_URI_META_DATA_KEY = "io.flutter.EntrypointUri";
   /* package */ static final String INITIAL_ROUTE_META_DATA_KEY = "io.flutter.InitialRoute";
-  /* package */ static final String SPLASH_SCREEN_META_DATA_KEY =
-      "io.flutter.embedding.android.SplashScreenDrawable";
   /* package */ static final String NORMAL_THEME_META_DATA_KEY =
       "io.flutter.embedding.android.NormalTheme";
   /* package */ static final String HANDLE_DEEPLINKING_META_DATA_KEY =

shell/platform/android/io/flutter/embedding/android/FlutterActivityLaunchConfigs.java

@@ -1447,18 +1447,6 @@ public TransparencyMode getTransparencyMode() {
     return TransparencyMode.valueOf(transparencyModeName);
   }
 
-  @Override
-  @Nullable
-  public SplashScreen provideSplashScreen() {
-    FragmentActivity parentActivity = getActivity();
-    if (parentActivity instanceof SplashScreenProvider) {
-      SplashScreenProvider splashScreenProvider = (SplashScreenProvider) parentActivity;
-      return splashScreenProvider.provideSplashScreen();
-    }
-
-    return null;
-  }
-
   /**
    * Hook for subclasses to return a {@link io.flutter.embedding.engine.FlutterEngine} with whatever
    * configuration is desired.