Android: disable hardware acceleration on ComponentPeerView level rather than application level to allow embedded views to use hardware acceleration if needed.

This circumvents the issue in web view scrolling that happens only when using software rendering (a potential bug in chromium).

extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Android.h

@@ -1606,9 +1606,14 @@ private:
             }
 
             if (androidMinimumSDK.get().getIntValue() >= 11)
-                app->setAttribute ("android:hardwareAccelerated", "false"); // (using the 2D acceleration slows down openGL)
+            {
+                if (! app->hasAttribute ("android:hardwareAccelerated"))
+                    app->setAttribute ("android:hardwareAccelerated", "false"); // (using the 2D acceleration slows down openGL)
+            }
             else
+            {
                 app->removeAttribute ("android:hardwareAccelerated");
+            }
 
             auto* act = getOrCreateChildWithName (*app, "activity");
 
@@ -1652,6 +1657,19 @@ private:
 
             setAttributeIfNotPresent (*act, "android:launchMode", "singleTask");
 
+            // Using the 2D acceleration slows down OpenGL. We *do* enable it here for the activity though, and we disable it
+            // in each ComponentPeerView instead. This way any embedded native views, which are not children of ComponentPeerView,
+            // can still use hardware acceleration if needed (e.g. web view).
+            if (androidMinimumSDK.get().getIntValue() >= 11)
+            {
+                if (! act->hasAttribute ("android:hardwareAccelerated"))
+                    act->setAttribute ("android:hardwareAccelerated", "true"); // (using the 2D acceleration slows down openGL)
+            }
+            else
+            {
+                act->removeAttribute ("android:hardwareAccelerated");
+            }
+
             auto* intent = getOrCreateChildWithName (*act, "intent-filter");
 
             auto* action = getOrCreateChildWithName (*intent, "action");

modules/juce_core/native/java/JuceAppActivity.java

@@ -568,6 +568,8 @@ public class JuceAppActivity   extends Activity
 
             colorMatrix.set (colorTransform);
             paint.setColorFilter (new ColorMatrixColorFilter (colorMatrix));
+
+            setLayerType (View.LAYER_TYPE_NONE, null);
         }
 
         //==============================================================================

modules/juce_gui_extra/native/juce_AndroidViewComponent.cpp

@@ -106,8 +106,11 @@ private:
         {
             jobject peerView = (jobject) currentPeer->getNativeHandle();
 
+            auto* env = getEnv();
+            auto parentView = env->CallObjectMethod (peerView, AndroidView.getParent);
+
             // Assuming a parent is always of ViewGroup type
-            getEnv()->CallVoidMethod (peerView, AndroidViewGroup.addView, view.get());
+            env->CallVoidMethod (parentView, AndroidViewGroup.addView, view.get());
 
             componentMovedOrResized (false, false);
         }