Android Possible Overdraw

But too much overdraw can be an issue. Hop into Developer Options find Debug GPU overdraw usually under Hardware Accelerated Rendering category although it varies from device to.

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Overdraw happens every time the application asks the system to draw something on top of something else.

Android possible overdraw. The StackedViews app arranges three overlapping TextView objects inside a ConstraintLayout to demonstrate overdraw. OVERDRAW is a term used to describe. Finding overdraw is super easy you can do it right on your device.

The Debug GPU Overdraw tool uses color-coding to show the number of times your app draws each pixel on the screen. Scroll down to the Hardware accelerated rendering section and select Debug GPU Overdraw. Now your device shows overdraw on every screen in every app.

I have implemented clickable Recyclerview item and set androidbackgroundselectableItemBackground for click effect but while inspecting code I found this lint issue. This means that some pixels are colored in twice which is overdraw. Use the Layout Inspector tool to identify how you could simplify the view hierarchy.

Official color codes for the overdraw provided in Android Developer site We can enable this tool through Settings – Developer Options – Debug GPU overdraw – Show overdraw. Root element paints background drawablemain with a theme that also paints a background. The reversed transaction tries to remove B from Ridcontent which is not there cause weve C and adds A backThe results.

Some overdraw as in the example above is inevitable. The platform offers the following tools to help you determine if overdraw is affecting your apps performance. Thankfully its also easy to fix.

When the system draws the button it draws over the existing white background. Android OS limits it. One of the most problematic performance problems on Android is the easiest to create.

Root element paints background with a theme that also paints a background. Where inferred theme is androidstyleThemeNoTitleBarFullscreen. In the Debug GPU overdraw dialog select Show overdraw areas.

The higher this count the more likely it is that overdraw affects your apps performance. Root element paints background androidattrselectableItemBackground with a theme that also paints a background inferred theme is styleWordPress_NoActionBar 6 androidlayout_marginStartdimenmargin_small 7 androidlayout_marginEnddimenmargin_small. Android doesnt just paint the areas of blue that are visible to the user it paints the entire blue background and then draws the text on top.

Root element paints background drawablelavagna_verticale with a theme that also paints a background inferred theme is androidstyleThemeHolo i created a new style. While this is a contrived and simplistic example overlapping views can easily. Fix the StackedViews app to reduce overdraw.

On your device go to Settings and tap Developer Options. Choose Show Overdraw Areas. Weve both aFragment and cFragment showing on the screen.

Fortunately we can detect re-painting in android by selecting Show overdraw areas in Debug GPU overdraw under Developer options in phone settings. Run the Debug GPU Overdraw tool on the StackedViews app. NICE You might even not see this if your fragment root view has an androidbackground property possible overdrawBut you will see a strange behavior when the user tries again to go from.

If the app freezes continually or is kinda slow it can be that the GPU usage grew exponentially due to Overdraw since the pixels are updating all the time and somehow it. Ie a window with a white background and a single button on top of it. While running Android Lint on my Project I came across this warning.

With overdraw in Android we waste GPU time by coloring the pixels on the screen that end up being colored again by something else later. Debug GPU overdraw tool. Root element paints background.

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