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What's new in GPS Logger for Android 136-rc4

Verification:

cosign verify-blob gpslogger-136-rc4.apk --bundle gpslogger-136-rc4.apk.cosign.bundle --new-bundle-format --cert-oidc-issuer token.actions.githubusercontent.com --cert-identity github.com/mendhak/gpslogger/.github/workflows/generate-release-apk.yml@refs/tags/v136-rc4

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About GPS Logger for Android 136-rc4

GPSLogger

GPSLogger is an Android app that logs GPS information to various formats (GPX, KML, CSV, NMEA, Custom URL) and has options for uploading (SFTP, OpenStreetMap, Google Drive, Dropbox, Email). This app aims to be as battery efficient as possible.

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Read about GPSLogger's features here

Download

You can find it on F-Droid

You can download directly from the releases.

Contribute

You can help with translations on Weblate.

You can also submit pull requests for bug fixes and new features.

I'm not very good at UIs, so any work with the layouts would be appreciated!

License and policy

Licensed under GPL v2 | Third party licenses | Privacy policy

Verifying

It's good practice to verify downloads. A PGP signature, Cosign bundle, and an SHA256 checksum will accompany each .apk.

To verify the PGP integrity and signature:

gpg --recv-key 6989CF77490369CFFDCBCD8995E7D75C76CBE9A9 gpg --verify gpslogger-132.apk.asc

(Experimental) To verify with Sigstore Cosign, the command should be in the releases notes, it will look like this:

token.actions.githubusercontent.com --cert-identity ">github.com/mendhak/gpslogger/.github/workflows/generate-release-apk.yml@refs/head/master">

cosign verify-blob gpslogger-132.apk  --bundle gpslogger-132.apk.cosign.bundle --new-bundle-format  --cert-oidc-issuer token.actions.githubusercontent.com  --cert-identity github.com/mendhak/gpslogger/.github/workflows/generate-release-apk.yml@refs/head/master

To verify the checksum:

sha256sum -c gpslogger-132.apk.SHA256

Setting up the code

The project is based on the Android build system plugin for Gradle. These instructions are for Ubuntu Linux with Android Studio, but for other OSes, it should be roughly similar.

Set up your Android Development Environment

Follow the instructions on the Android Developer Website to set up your computer for development.

Download and install Android Studio (there's also a snap)

Clone the GPSLogger repository

git clone git://github.com/mendhak/gpslogger.git

Get the Android SDK extra repositories

This project uses certain Android libraries, you can install them using Google's poorly implemented sdkmanager:

  echo y | $HOME/android-sdk/tools/bin/sdkmanager 'tools'   echo y | $HOME/android-sdk/tools/bin/sdkmanager 'platform-tools'   echo y | $HOME/android-sdk/tools/bin/sdkmanager 'build-tools;26.0.2'   echo y | $HOME/android-sdk/tools/bin/sdkmanager 'platforms;android-27'   echo y | $HOME/android-sdk/tools/bin/sdkmanager 'platforms;android-25'   echo y | $HOME/android-sdk/tools/bin/sdkmanager 'extras;google;m2repository'   echo y | $HOME/android-sdk/tools/bin/sdkmanager 'extras;android;m2repository'   echo y | $HOME/android-sdk/tools/bin/sdkmanager 'extras;google;google_play_services'

Create local.properties

Create a file called local.properties, pointing at your Android SDK directory.

local.properties">

cd gpslogger echo "sdk.dir=/home/mendhak/Programs/Android" > local.properties

Import the project

Open up Android Studio and choose to import a project. Select the topmost build.gradle file under GPSLogger.

If you get an Import dialog, choose to Import project from external model

On the next screen, choose the defaults and proceed (default gradle wrapper)

Give it a minute and Android Studio will configure the projects and download the various libraries.

OpenStreetMap Setup (Optional)

Click on 'My Settings', then 'OAuth2 Applications'

Click on 'Register your application'

Fill in the form with these details. Remember to uncheck the 'Confidential Application' checkbox, since this is a mobile app.

After registering the application, you will receive a Client ID.
Place the Client ID in OpenStreetMapManager#getOpenStreetMapClientID().
If you used your own custom scheme, replace the value in AndroidManifest.xml and OpenStreetMapManager#getOpenStreetMapRedirect()

Dropbox Setup (Optional)

Go to the Dropbox Developers page and click on 'Create an App'

Use these settings, but choose a unique name

After creating the app, you will receive an app key and secret (the ones in the screenshot are fake)

Place the keys in your ~/.gradle/gradle.properties like this:

GPSLOGGER_DROPBOX_APPKEY=abcdefgh GPSLOGGER_DROPBOX_APPSECRET=1234123456

Replace the Dropbox app key to your AndroidManifest.xml file

Google Drive Setup (optional)

Under APIs and Services, enable the Google Drive API.
Next, go to the Oauth Consent Screen, going through the steps until you reach scopes. Add the www.googleapis.com/auth/drive.file scope.

Create some OAuth credentials, of type Android.
Under package name, use com.mendhak.gpslogger. For the SHA-1 Certificate fingerprint, get it using the keytool -keystore ~/.android/debug.keystore -list -v command.

Overview

GPSLogger is composed of a few main components;

Event Bus

The Event Bus is where all the cross communication happens. Various components raise their events on the Event Bus, and other parts of the application listen for those events. The most important one is when a location is obtained, it is placed on the event bus and consumed by many fragments.

GPS Logging Service

GPSLoggingService is where all the work happens. This service talks to the location providers (network and satellite). It sets up timers and alarms for the next GPS point to be requested. It passes location info to the various loggers so that they can write files. It also invokes the auto-uploaders so that they may send their files to DropBox, OSM, etc.

It also passes information to the Event Bus.

GPS Main Activity

This is the main visible form in the app. It consists of several 'fragments' - the simple view, detailed view and big view.

It takes care of the main screen, the menus and toolbars.

The fragments listen to the Event Bus for location changes and display it in their own way.

Session and AppSettings

Floating about are two other objects. Session contains various pieces of information related to the current GPSLogger run, such as current file name, the last known location, satellite count, and any other information which isn't static but is needed for the current run of GPSLogger.

AppSettings is a representation of the user's preferences.

These objects are visible throughout the application and can be accessed directly by any class, service, activity or fragment.

Assembling the APK for Github release

The 'assemble' Gradle task will build, and it also looks for a GPG key to sign the APK with. It needs some setup first:

Create ~/.gradle/gradle.properties which contains the release store and its key details, as well as the GPG key details

RELEASE_STORE_FILE=/path/to/the.keystore RELEASE_STORE_PASSWORD=xxxxxxxxxxxxxxxxxx RELEASE_KEY_ALIAS=gpsloggerkey RELEASE_KEY_PASSWORD=xxxxxxxxxxxxxxxxxx signing.gnupg.keyName=xxxxxxxxxxxxxxxxxx signing.gnupg.passphrase=xxxxxxxxxxxxxxxxxx

Ensure that gpg2 is installed

sudo apt install gnupg2

And ensure that the above gnupg.keyname is in the gpg keystore, have a look using gpg2 --list-secret-keys

Once these pieces are in place, the 'assemble' task should build the APK, sign it, and create a checksum too.
If it doesn't appear in the gpslogger folder, run 'copyFinalAPK' so that it copies the APK, ASC and SHA256 files to the gpslogger folder.
Finally upload to Github Releases.

F-Droid release

F-Droid watches the Github repository for tags, and will build those tags, and sign it using its own key. So, there isn't too much to do.

Ensure that gpslogger/build.gradle versionCode and versionName contains the latest version number to be released.

Finally tag the commit,

git tag -s v128 git push origin master --tags

Working notes for F-Droid

Use the fdroidserver docker image. Clone the fdroid metadata repo and make changes to the com.mendhak.gpslogger.yml file.

gitlab.com/fdroid/fdroiddata.git cd fdroiddata # f-droid.org/en/docs/Submitting_to_F-Droid_Quick_Start_Guide/ # initialize the metadata repo docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master init -v # lint your metadata yml docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master lint com.mendhak.gpslogger -v docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master readmeta # see if the latest tag will get picked up. docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master checkupdates --auto com.mendhak.gpslogger docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master rewritemeta com.mendhak.gpslogger # build docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master build -v -l com.mendhak.gpslogger">

git clone gitlab.com/fdroid/fdroiddata.git
cd fdroiddata

# f-droid.org/en/docs/Submitting_to_F-Droid_Quick_Start_Guide/
# initialize the metadata repo
docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master init -v

# lint your metadata yml
docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master lint com.mendhak.gpslogger -v
docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master readmeta

# see if the latest tag will get picked up. 
docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master checkupdates --auto com.mendhak.gpslogger
docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master rewritemeta com.mendhak.gpslogger

# build
docker run --rm -v /home/mendhak/Android/Sdk:/opt/android-sdk -v $(pwd):/repo -e ANDROID_HOME:/opt/android-sdk registry.gitlab.com/fdroid/docker-executable-fdroidserver:master build -v -l com.mendhak.gpslogger

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Download GPS Logger for Android 136-rc4

This release may come in several variants. Consult our handy FAQ to see which download is right for you.

Variant

ArchArchitecture

VersionMinimum Version

DPIScreen DPI

136-rc4 APK
136
July 4, 2026

universal

Android 5.0+

nodpi

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Comments

What's new in GPS Logger for Android 136-rc4

About GPS Logger for Android 136-rc4

GPSLogger

Download

Contribute

License and policy

Verifying

Setting up the code

Set up your Android Development Environment

Clone the GPSLogger repository

Get the Android SDK extra repositories

Create local.properties

Import the project

OpenStreetMap Setup (Optional)

Dropbox Setup (Optional)

Google Drive Setup (optional)

Overview

Event Bus

GPS Logging Service

GPS Main Activity

Session and AppSettings

Assembling the APK for Github release

F-Droid release

Working notes for F-Droid

Download GPS Logger for Android 136-rc4

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