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Loading large datasets in Android
Hello,
It has come to our attention that changes in the behavior of the Android Build Tools (starting with version 25? we are unclear on the exact number) can affect the performance of device database loading times of the Vuforia SDK.
For smaller databases (less than 10 images), the effect may not be noticeable. However, for larger databases, the time to load can take several seconds or longer.
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Load dataset from Android split binary (obb)
A previous thread has described a few different approaches to handling an Android app that exceeds 100mb in size: https://developer.vuforia.com/forum/faq/unity-how-can-i-handle-large-android-apps
This thread will provide a small example of how to load a dataset from the obb file when using the split binary option.
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Vuforia Rendering Primitives
Attention native Android and iOS developers:
We’re updating our rendering API to allow for increased flexibility, better performance and easier integration of Vuforia with other rendering engines.
What does this mean for you?
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Video Playback on Texture - Black screen appears at beginning for a moment
Issue explanation: a blank screen appears for a few moments (it's usually less than half a second), after the target was detected
When?: right after a target is detected, and the video is right about to start (PLAYING state)
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Using Android Studio with Vuforia
If you are using or planning to use the Android Studio IDE, here are some notes about how to import and build the Vuforia samples:
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Vuforia and Android - Common topics
This is a list of common questions, issues and how-to topics related to using the Vuforia SDK onm the Android platform:
- How to replace the sample Dataset with a custom Dataset in the Image Targets sample:
https://developer.vuforia.com/forum/faq/android-how-do-i-replace-dataset-image-targets-sample
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Vuforia, Android and OpenGL ES
OpenGL ES is the standard for rendering 3D content on mobile platforms.
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How do I fix my compile or runtime errors
The general procedure on how to build and run a Vuforia sample app is described in this page:
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problem with the quality and colour camera of my smartphone
I use my vuforia and unity (up to date) to make AR applications on my phone.
However I have some problems: The applications normally work one out of 5 times on my phone ( XIAOMI MI NOTE 10 Android 10), while on my girlfriend's phone ( HUAWEI P20 Android 9) the applications work all the time.
The rest of the time I have the following problems:
-the focus is not done automatically (problem solved with one line of code).
-camera quality is very low
-the colours are not the right ones (e.g. red becomes blue, purple becomes green etc.).