From 90808ead98edbab33a6bcc724d123864842a5ed3 Mon Sep 17 00:00:00 2001 From: Eskil Abrahamsen Blomfeldt Date: Thu, 22 May 2014 14:10:53 +0200 Subject: Android: Fix flashing on startup/shutdown There were several issues on startup of the application which were caused by the fact that we would get the wrong available screen geometry on startup, set this as the initial surface size and then expose native windows with this size. This would cause first a flicker of white on the early expose and the window contents to jump around as the window was resized to the actual available space on screen. The fix for this is to postpone the first expose until we have actually got a proper screen size from the main layout. We use width,height = 0 as an indicator that the available geometry is not yet known, and we skip posting any expose events before this is set by the layout. In addition, since we removed the surface before we shut down the application, it was by a white rectangle before the shutdown transition happens, and this white rectangle will be animated instead of application contents. To rectify this, we make sure the last surface in the stack remains in the layout until it is either replaced by a different surface or until the application has shut down. This way, the shutdown animation will work on this surface instead. [ChangeLog][Android] Fixed regression where there would be flickering on startup and shutdown of the application. Task-number: QTBUG-38960 Change-Id: Ia1579ca8c522d8beeab066f78070ad49009d0238 Reviewed-by: Paul Olav Tvete --- .../java/src/org/qtproject/qt5/android/bindings/QtActivity.java | 3 +++ 1 file changed, 3 insertions(+) (limited to 'src/android/java/src/org/qtproject/qt5/android/bindings/QtActivity.java') diff --git a/src/android/java/src/org/qtproject/qt5/android/bindings/QtActivity.java b/src/android/java/src/org/qtproject/qt5/android/bindings/QtActivity.java index f99bb84077..45be15bc01 100644 --- a/src/android/java/src/org/qtproject/qt5/android/bindings/QtActivity.java +++ b/src/android/java/src/org/qtproject/qt5/android/bindings/QtActivity.java @@ -69,6 +69,7 @@ import android.content.res.Resources.Theme; import android.content.res.AssetManager; import android.graphics.Bitmap; import android.graphics.Canvas; +import android.graphics.drawable.ColorDrawable; import android.net.Uri; import android.os.Build; import android.os.Bundle; @@ -874,6 +875,8 @@ public class QtActivity extends Activity // if splash screen is defined, then show it if (m_activityInfo.metaData.containsKey("android.app.splash_screen_drawable")) getWindow().setBackgroundDrawableResource(m_activityInfo.metaData.getInt("android.app.splash_screen_drawable")); + else + getWindow().setBackgroundDrawable(new ColorDrawable(0xff000000)); startApp(true); } } -- cgit v1.2.3