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en:help:v2:tracker [2018/12/28 15:57] – alpinequest | en:help:v2:tracker [2019/08/21 15:14] – [Track not correctly recorded when the screen is turned off] alpinequest | ||
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In recent Android versions, multiple optimization tools have been added in order to reduce battery usage, especially targeting background applications. For example, the " | In recent Android versions, multiple optimization tools have been added in order to reduce battery usage, especially targeting background applications. For example, the " | ||
- | {{: | + | {{: |
__Example on Samsung devices__: | __Example on Samsung devices__: | ||
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===== Problems with the track recorder ===== | ===== Problems with the track recorder ===== | ||
- | \\ | + | |
- | **Track not correctly recorded when the screen is turned off**\\ | + | ==== Track not correctly recorded when the screen is turned off ==== |
On top of the Android battery optimization tools, some brands also include their own tools that may disable the use of GPS or network for background applications, | On top of the Android battery optimization tools, some brands also include their own tools that may disable the use of GPS or network for background applications, | ||
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* In the battery saver category, tap " | * In the battery saver category, tap " | ||
* Locate and tap " | * Locate and tap " | ||
- | * Tap " | + | * Tap " |
* Tap the top application name {{: | * Tap the top application name {{: | ||
{{ : | {{ : | ||
+ | |||
+ | __For HTC devices__: | ||
+ | [[https:// | ||
__For some other devices__: | __For some other devices__: | ||
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For some devices (like Huawei Mate 10), a system update can also fix this problem. | For some devices (like Huawei Mate 10), a system update can also fix this problem. | ||
- | **The track recorder service stops**\\ | + | ==== The track recorder service stops ==== |
In addition of being closed by the system as seen before, some " | In addition of being closed by the system as seen before, some " | ||
- | **Loss of the GPS signal**\\ | + | ==== Loss of the GPS signal |
A common issue when recording a track is the loss of the GPS signal, leading to a missing part in the recorded track (seen as a straight line longer than usual). It usually happens because the device doesn' | A common issue when recording a track is the loss of the GPS signal, leading to a missing part in the recorded track (seen as a straight line longer than usual). It usually happens because the device doesn' | ||
- | **Device gets hot**\\ | + | ==== Recorded track doesn' |
+ | |||
+ | Some devices perform better than others when using the GPS, depending on the quality of the hardware used and the internal conception (placement of the GPS chip inside the device). Some devices require a stronger GPS signal to give an acceptable accuracy. For example, here is the same track recorded at the same time by two different devices (one in the left pocket, one in the right) during a small outside walk with occasional stays inside buildings. We can see that the Samsung Galaxy S9 {{: | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | ==== Device gets hot ==== | ||
Tracking a path requires frequent GPS location updates and some devices (mainly old or low-cost ones, but not always) doesn' | Tracking a path requires frequent GPS location updates and some devices (mainly old or low-cost ones, but not always) doesn' | ||
* The device becomes more hot than usual; | * The device becomes more hot than usual; |