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The black screen just blinks for a while

In my Windows Phone 8 application, I have a search page in which a user is used to enter keywords in a TextBox. The search will be called up when you enter the "Enter" key by default on the SIP keyboard. The search result is displayed on another page. To hide the keyboard before navigating to the results page, I changed the focus of the TextBox using this method. Focus (). But even after that, the black screen just blinks for a while. Is there a way to completely hide the SIP keyboard before the search and navigation method. Please help me.

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This is a rendering problem, one way to fix this is to change the opacity of your applicationbar

 <shell:ApplicationBar IsVisible="True" Opacity="0.99">

When I had the same problem, I thought that I needed to fix it WITHOUT changing the application bar. So I went through the whole page and it looks like I had a lot of controls that were built into my panorama, but this was not a direct child of the layout’s root grid, so this caused a problem.

Let me know how this happens (:

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