Please provide all your related code. I donot  know you want transparency or 
not.
"transparent background was merged into crosswalk-12 at 2015.02.23.".
If you want to use transparency, use version after this day.

> BTW, you need to do these to enable transparent:
> 1),  Set ANIMATABLE_XWALK_VIEW to false, this only works for 
> SurfaceView.
> XWalkPreferences.setValue(XWalkPreferences.ANIMATABLE_XWALK_VIEW,
> false);
> 2), Apply tranparent theme in AndroidManifest.xml 
> android:theme="@android:style/Theme.Translucent.NoTitleBar"
> 3), Call xWalkView.setBackgroundColor(Color.TRANSPARENT);


-----Original Message-----
From: timliu [mailto:[email protected]] 
Sent: Thursday, May 21, 2015 5:04 AM
To: Xu, Xing
Cc: [email protected]
Subject: RE: [Crosswalk-help] ANIMATABLE_XWALK_VIEW wording, transparency, ...?

Sorry, somehow my question seems lost in translation.

@
https://crosswalk-project.org/apis/embeddingapidocs_v3/org/xwalk/core/XWalkPreferences.html#ANIMATABLE_XWALK_VIEW

I want XWalkView to use SurfaceView.

(I know that by default, it already does, "Since it internally uses 
android.view.SurfaceView for rendering web pages by default")

My issue is #ANIMATABLE_XWALK_VIEW: "Default value is true. ...  If this key is 
set to True, ... Internally, Crosswalk is alternatively using TextureView as 
the backend of XWalkView."

Therefore, if I wanted to manually set to SurfaceView, my direction should be: 
"If this key is set to False, then SurfaceView will be created internally as 
the rendering backend."

Ok! So to set it to SurfaceView, I do:
XWalkPreferences.setValue(XWalkPreferences.ANIMATABLE_XWALK_VIEW,
false);

However! Why does it make this view transparent? I don't want it transparent.

xWalkWebView.setAlpha((float) 1.0) <-- still transparent
xWalkView.setBackgroundColor(Color.BLACK) <-- still transparent

If I leave out that setValue line, then it's fine. What is the difference? What 
changed?

Thanks!
-Tim

On 2015-05-19 17:29, Xu, Xing wrote:
> Hi, Tim,  Thanks for your feedback.
> 
> "The inside of XWalkView is a SurfaceView( If ANIMATABLE_XWALK_VIEW is
> true) or TextureView( If ANIMATABLE_XWALK_VIEW is false)."
> ************************************************************
> ==> I have edit this description. Please check it.
> 
> 
> 2. My other issue is the *Transparency* that happens when I set 
> ANIMATABLE_XWALK_VIEW to FALSE. I do not know why that is supposed to 
> happen. If I leave out that XWalkPreferences.setValue line, then it 
> shows up fine.
> ************************************************************
> ==>For transparency, better check with 
> https://crosswalk-project.org/jira/browse/XWALK-3308.
> XWALK-3742 is for XWalkView overlay with MapView.
> BTW, you need to do these to enable transparent:
> 1),  Set ANIMATABLE_XWALK_VIEW to false, this only works for 
> SurfaceView.
> XWalkPreferences.setValue(XWalkPreferences.ANIMATABLE_XWALK_VIEW,
> false);
> 2), Apply tranparent theme in AndroidManifest.xml 
> android:theme="@android:style/Theme.Translucent.NoTitleBar"
> 3), Call xWalkView.setBackgroundColor(Color.TRANSPARENT);
> 
> 
> Regards,
> XIng
> 
> -----Original Message-----
> From: Crosswalk-help
> [mailto:[email protected]] On Behalf 
> Of timliu
> Sent: Wednesday, May 20, 2015 3:56 AM
> To: [email protected]
> Subject: [Crosswalk-help] ANIMATABLE_XWALK_VIEW wording, transparency, 
> ...?
> 
> I am a bit confused by ANIMATABLE_XWALK_VIEW:
> 
> 1. I am interested in using SurfaceView instead of TextureView for 
> XWalkView... because SurfaceView consumes less resource.
> 
> Multiple sources state that FALSE will switch to SurfaceView:
> @
> https://github.com/crosswalk-project/crosswalk-website/wiki/Android-Su
> rfaceView-vs-TextureView
> @
> https://crosswalk-project.org/apis/embeddingapidocs_v3/org/xwalk/core/
> XWalkPreferences.html
> 
> Yet, another source says opposite:
> @
> https://crosswalk-project.org/jira/si/jira.issueviews:issue-html/XWALK
> -3742/XWALK-3742.html "The inside of XWalkView is a SurfaceView( If 
> ANIMATABLE_XWALK_VIEW is
> true) or TextureView( If ANIMATABLE_XWALK_VIEW is false)."
> 
> Anyways, I'm sure setting FALSE is correct...
> 
> 2. My other issue is the *Transparency* that happens when I set 
> ANIMATABLE_XWALK_VIEW to FALSE. I do not know why that is supposed to 
> happen. If I leave out that XWalkPreferences.setValue line, then it 
> shows up fine.
> 
> Here is my code:
> **************************************
> if (xWalkWebView == null) {
> XWalkPreferences.setValue(XWalkPreferences.ANIMATABLE_XWALK_VIEW,
> false);
> xWalkWebView = new XWalkView(this, MyActivity.this); }
> 
> xWalkWebView.load(myUrl, null);
> 
> if (android.os.Build.VERSION.SDK_INT >=
> android.os.Build.VERSION_CODES.HONEYCOMB) {
> ((LinearLayout)
> findViewById(R.id.topVWin_holder)).setLayerType(View.LAYER_TYPE_HARDWA
> RE,
> null);
> xWalkWebView.setLayerType(View.LAYER_TYPE_HARDWARE, null); }
> 
> ((LinearLayout)
> findViewById(R.id.topVWin_holder)).addView(xWalkWebView);
> ((LinearLayout)
> findViewById(R.id.topVWin_holder)).bringChildToFront(xWalkWebView);
> xWalkWebView.bringToFront();
> xWalkWebView.setAlpha((float) 1.0);
> **************************************
> 
> I thought it was my LinearLayout holder hiding behind something or 
> that I needed to re-set Alpha back to 1.0, but no effect.
> 
> I am using the latest version 12.41.x
> 
> Thanks!
> -Tim
> 
> P.S. Does this line work with crosswalk?
> xWalkWebView.setLayerType(View.LAYER_TYPE_HARDWARE, null)
> 
> xWalkWebView.isHardwareAccelerated() shows TRUE but
> xWalkWebView.getLayerType() shows 0 (=LAYER_TYPE_NONE) 
> _______________________________________________
> Crosswalk-help mailing list
> [email protected]
> https://lists.crosswalk-project.org/mailman/listinfo/crosswalk-help

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