add min sdk annotations

Author: maRci002

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

@@ -21,6 +21,7 @@
 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 android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
@@ -40,6 +41,7 @@
 import android.window.OnBackInvokedDispatcher;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 import androidx.annotation.VisibleForTesting;
 import androidx.lifecycle.Lifecycle;
 import androidx.lifecycle.LifecycleOwner;
@@ -657,7 +659,7 @@ protected void onCreate(@Nullable Bundle savedInstanceState) {
    */
   @VisibleForTesting
   public void registerOnBackInvokedCallback() {
-    if (onBackInvokedCallback != null) {
+    if (Build.VERSION.SDK_INT >= 33 && onBackInvokedCallback != null) {
       getOnBackInvokedDispatcher()
           .registerOnBackInvokedCallback(
               OnBackInvokedDispatcher.PRIORITY_DEFAULT, onBackInvokedCallback);
@@ -673,7 +675,7 @@ public void registerOnBackInvokedCallback() {
    */
   @VisibleForTesting
   public void unregisterOnBackInvokedCallback() {
-    if (onBackInvokedCallback != null) {
+    if (Build.VERSION.SDK_INT >= 33 && onBackInvokedCallback != null) {
       getOnBackInvokedDispatcher().unregisterOnBackInvokedCallback(onBackInvokedCallback);
       hasRegisteredBackCallback = false;
     }
@@ -921,18 +923,24 @@ public void onBackPressed() {
     }
   }
 
+  @TargetApi(34)
+  @RequiresApi(34)
   public void startBackGesture(@NonNull BackEvent backEvent) {
     if (stillAttachedForEvent("startBackGesture")) {
       delegate.startBackGesture(backEvent);
     }
   }
 
+  @TargetApi(34)
+  @RequiresApi(34)
   public void updateBackGestureProgress(@NonNull BackEvent backEvent) {
     if (stillAttachedForEvent("updateBackGestureProgress")) {
       delegate.updateBackGestureProgress(backEvent);
     }
   }
 
+  @TargetApi(34)
+  @RequiresApi(34)
   public void cancelBackGesture() {
     if (stillAttachedForEvent("cancelBackGesture")) {
       delegate.cancelBackGesture();

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

@@ -7,6 +7,7 @@
 import static android.content.ComponentCallbacks2.TRIM_MEMORY_RUNNING_LOW;
 import static io.flutter.embedding.android.FlutterActivityLaunchConfigs.DEFAULT_INITIAL_ROUTE;
 
+import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
@@ -20,6 +21,7 @@
 import android.window.OnBackAnimationCallback;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 import androidx.annotation.VisibleForTesting;
 import androidx.lifecycle.Lifecycle;
 import io.flutter.FlutterInjector;
@@ -792,6 +794,8 @@ void onBackPressed() {
    * @param backEvent The BackEvent object containing information about the touch or button press.
    *     This value cannot be null.
    */
+  @TargetApi(34)
+  @RequiresApi(34)
   void startBackGesture(@NonNull BackEvent backEvent) {
     ensureAlive();
     if (flutterEngine != null) {
@@ -812,6 +816,8 @@ void startBackGesture(@NonNull BackEvent backEvent) {
    *
    * @param backEvent An BackEvent object describing the progress event. This value cannot be null.
    */
+  @TargetApi(34)
+  @RequiresApi(34)
   void updateBackGestureProgress(@NonNull BackEvent backEvent) {
     ensureAlive();
     if (flutterEngine != null) {
@@ -832,6 +838,8 @@ void updateBackGestureProgress(@NonNull BackEvent backEvent) {
    * rollback of any changes or animations that were initiated in response to the back gesture. This
    * includes resetting UI elements or state to their original form before the gesture started.
    */
+  @TargetApi(34)
+  @RequiresApi(34)
   void cancelBackGesture() {
     ensureAlive();
     if (flutterEngine != null) {

shell/platform/android/io/flutter/embedding/engine/systemchannels/NavigationChannel.java

@@ -4,9 +4,11 @@
 
 package io.flutter.embedding.engine.systemchannels;
 
+import android.annotation.TargetApi;
 import android.window.BackEvent;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 import io.flutter.Log;
 import io.flutter.embedding.engine.dart.DartExecutor;
 import io.flutter.plugin.common.JSONMethodCodec;
@@ -58,16 +60,22 @@ public void popRoute() {
     channel.invokeMethod("popRoute", null);
   }
 
+  @TargetApi(34)
+  @RequiresApi(34)
   public void startBackGesture(@NonNull BackEvent backEvent) {
     Log.v(TAG, "Sending message to start back gesture");
     channel.invokeMethod("startBackGesture", backEventToJsonMap(backEvent));
   }
 
+  @TargetApi(34)
+  @RequiresApi(34)
   public void updateBackGestureProgress(@NonNull BackEvent backEvent) {
     Log.v(TAG, "Sending message to update back gesture progress");
     channel.invokeMethod("updateBackGestureProgress", backEventToJsonMap(backEvent));
   }
 
+  @TargetApi(34)
+  @RequiresApi(34)
   public void cancelBackGesture() {
     Log.v(TAG, "Sending message to cancel back gesture");
     channel.invokeMethod("cancelBackGesture", null);
@@ -77,6 +85,8 @@ public void setMethodCallHandler(@Nullable MethodChannel.MethodCallHandler handl
     channel.setMethodCallHandler(handler);
   }
 
+  @TargetApi(34)
+  @RequiresApi(34)
   private Map<String, Object> backEventToJsonMap(@NonNull BackEvent backEvent) {
     Map<String, Object> message = new HashMap<>(4);
     message.put("touchX", backEvent.getTouchX());

shell/platform/android/io/flutter/view/FlutterView.java

@@ -369,14 +369,20 @@ public void popRoute() {
     navigationChannel.popRoute();
   }
 
+  @TargetApi(34)
+  @RequiresApi(34)
   public void startBackGesture(@NonNull BackEvent backEvent) {
     navigationChannel.startBackGesture(backEvent);
   }
 
+  @TargetApi(34)
+  @RequiresApi(34)
   public void updateBackGestureProgress(@NonNull BackEvent backEvent) {
     navigationChannel.updateBackGestureProgress(backEvent);
   }
 
+  @TargetApi(34)
+  @RequiresApi(34)
   public void cancelBackGesture() {
     navigationChannel.cancelBackGesture();
   }