VTM for Android

[victorlysak]

You can study and test the vtm-android-example samples to see how the library works.

The main page mentions:
"Building VTM: set ANDROID_HOME environment variable with the Android SDK installation directory"

that's actually very simple, like

export ANDROID_HOME /home/dan/Android/Sdk

but it does not help.
..............

now in another project
my build.gradle has:

plugins {
    id 'com.android.application'
    id 'org.jetbrains.kotlin.android'
}

android {
    namespace 'com.example.lysaksnavi'
    compileSdk 35

    defaultConfig {
        applicationId "com.example.lysaksnavi"
        minSdk 24
        //noinspection ExpiredTargetSdkVersion
        targetSdk 35
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

        ndk {
            abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
        }
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_17
        targetCompatibility JavaVersion.VERSION_17
    }


    kotlinOptions {
        jvmTarget = "17"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    buildToolsVersion '35.0.0'
}

repositories {
    flatDir {
        dirs 'libs'
    }
    google()
    mavenCentral()
    maven { url 'https://jitpack.io' }
}

dependencies {
    implementation libs.androidx.core.ktx.v1101
    implementation libs.androidx.appcompat.v161
    implementation 'com.google.android.material:material:1.12.0'
    implementation 'androidx.preference:preference:1.2.1'
    implementation 'com.google.code.gson:gson:2.13.1'

    implementation "org.mapsforge.vtm:vtm-android:0.25.0"
    implementation "org.mapsforge:vtm-themes:0.25.0"
    implementation "org.mapsforge:vtm-extras:0.25.0"
    implementation "org.mapsforge:vtm-jts:0.25.0"
    implementation "org.locationtech.jts:jts-core:1.20.0"
// Native libs
    implementation "org.mapsforge:vtm-android:0.25.0:natives-armeabi-v7a"
    implementation "org.mapsforge:vtm-android:0.25.0:natives-arm64-v8a"
    implementation "org.mapsforge:vtm-android:0.25.0:natives-x86_64"
    implementation "org.mapsforge:vtm-android:0.25.0:natives-x86"

/*
    // --- Mapsforge Dependencies ---
    implementation("org.mapsforge:mapsforge-core:0.21.0")
    implementation("org.mapsforge:mapsforge-map:0.21.0")
    implementation("org.mapsforge:mapsforge-map-reader:0.21.0")
    implementation("org.mapsforge:mapsforge-map-android:0.21.0")
    implementation("org.mapsforge:mapsforge-themes:0.21.0")
*/
    // Download this AAR from osmdroid GitHub releases (e.g., for v6.1.18)
    // and place it in your app/libs folder
    implementation("org.osmdroid:osmdroid-mapsforge:6.1.20") // Adjust filename if different

    implementation 'com.caverock:androidsvg:1.4'             // From Maven
    implementation 'net.sf.kxml:kxml2:2.3.0'                 // From Maven


    testImplementation 'junit:junit:4.13.2' // Make sure you have JUnit here

    androidTestImplementation 'androidx.test.ext:junit:1.2.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.6.1'
    androidTestImplementation 'androidx.test:runner:1.6.2'
    // Sometimes useful, directly provides Runner functionality
    androidTestImplementation 'androidx.test:rules:1.6.1'  // Often brings in useful test rules


    implementation 'com.graphhopper:graphhopper-core:1.0'
    implementation 'com.graphhopper:graphhopper-tools:1.0'
    implementation 'com.graphhopper:graphhopper-map-matching-core:1.0'
    implementation 'com.graphhopper:graphhopper-reader-osm:1.0'

    implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.10.0'
    implementation 'com.fasterxml.jackson.core:jackson-core:2.10.0'
    implementation 'com.fasterxml.jackson.core:jackson-databind:2.10.0'

    implementation 'com.google.code.gson:gson:2.10.1'

    implementation 'com.google.android.flexbox:flexbox:3.0.0'
}

when in a file i have a problem

import org.mapsforge.vtm.android.MapView

undefied/unresolved

how to create my MapView

to later do something like:

fun setupMapConfiguration() {
        vtmMap = mapView

        btnZoomIn.setOnClickListener {
            try {
                vtmMap.animator().animateZoom(200, 1.2, 0f, 0f)
            } catch (t: Throwable) {
                Log.w(TAG, "animateZoom failed (zoomIn): ${t.message}")
            }
        }

        btnZoomOut.setOnClickListener {
            try {
                vtmMap.animator().animateZoom(200, (1.0 / 1.2), 0f, 0f)
            } catch (t: Throwable) {
                Log.w(TAG, "animateZoom failed (zoomOut): ${t.message}")
            }
        }

        zoomButtonUpdater(true, true)
    }

???

[devemux86]

@victorlysak To use the library in the apps you can follow the integration guide.

(ANDROID_HOME is only needed if you want to build the library)

[victorlysak]

thank you.

so, i've read the integration

and in my andr. studio, build.gradle i have:

    implementation 'com.github.mapsforge.vtm:vtm:0.25.0'
    implementation 'com.github.mapsforge.vtm:vtm-themes:0.25.0'
    implementation 'com.github.mapsforge.vtm:vtm-jts:0.25.0'

    implementation 'com.github.mapsforge.vtm:vtm-android:0.25.0'
    runtimeOnly 'com.github.mapsforge.vtm:vtm-android:0.25.0:natives-armeabi-v7a'
    runtimeOnly 'com.github.mapsforge.vtm:vtm-android:0.25.0:natives-arm64-v8a'
    runtimeOnly 'com.github.mapsforge.vtm:vtm-android:0.25.0:natives-x86'
    runtimeOnly 'com.github.mapsforge.vtm:vtm-android:0.25.0:natives-x86_64'

    implementation 'org.locationtech.jts:jts-core:1.20.0'

after sync
when i'm trying to:

import org.oscim.theme.InternalRenderTheme - unresolved
import org.oscim.theme.VtmThemes - unresolved
import org.mapsforge.vtm.datasource.MapFileTileSource  - unresolved
import org.mapsforge.vtm.layer.renderer.VectorLayer  - unresolved
import org.mapsforge.vtm.reader.XmlRenderTheme  - unresolved

.vtm. does not exist ???

then, in the following function when i try to display maps in the app:

fun initMapDisplay() {
        if (isMapDisplayInitializedAndReady) return

        vtmMap = mapView.map()

        // Delay theme + layer setup until the renderer is ready
        mapView.post {
            try {
                // SAFEST: start with built-in default theme
                val theme = AssetsRenderTheme(
                    context.assets,
                    "vtm/",        // folder inside assets
                    "default.xml" // the file we just created
                )
                vtmMap.setTheme(theme)

                // now load your .map files, layers, location, etc.
                loadLayers()

                isMapDisplayInitializedAndReady = true
                mapReadyCallback(true)
            } catch (e: Exception) {
                Log.e(TAG, "initMapDisplay error", e)
                isMapDisplayInitializedAndReady = false
                mapReadyCallback(false)
            }
        }
    }

no maps are displayed and logcat gives:

unknown attribute in element caption 1 : text-size = 14
 E  No vector layers set
 E  initMapDisplay error
    java.lang.IllegalStateException
    	at org.oscim.map.Map.setTheme(Map.java:222)
    	at org.oscim.map.Map.setTheme(Map.java:198)
    	at org.oscim.map.Map.setTheme(Map.java:189)

when i comment

//       vtmMap.setTheme(theme)

exception is not thrown but no maps displayed even though logcat shows that they all are loaded

Loaded map: austria.map
 I  Loaded map: belgium.map
 I  Loaded map: centro.map
 I  Loaded map: czech-republic.map
 I  Loaded map: denmark.map
 I  Loaded map: france.map
 I  Loaded map: germany.map
 I  Loaded map: great-britain.map
 I  Loaded map: liechtenstein.map
 I  Loaded map: luxembourg.map
 I  Loaded map: monaco.map
 I  Loaded map: netherlands.map
 I  Loaded map: nord-est.map
 I  Loaded map: nord-ovest.map
 I  Loaded map: switzerland.map
 D  eglMakeCurrent: 0x78c4bacfedc0: ver 3 1 (tinfo 0x78c4bacd4ae0)
 W  Points are too far apart 4.000000
 W  Points are too far apart 4.000000
 E  no theme is set
 E  no theme is set
 E  no theme is set
 E  no theme is set

does anyone know how to make this stuff work.

ps. if i want to use my local maps in cruiser android, where should i put the .map files ?

thank you

[devemux86]

InternalRenderTheme

@victorlysak There is no such class in VTM.
You need to clear your code and use the latest versions of the libraries.

Maps can be placed anywhere and can be read as files or streams (scoped storage).
See also the GettingStarted example.

[victorlysak]

latest is 0.25.0

so why doesn't cruiser app display any maps on my android screen ?

[devemux86]

why doesn't Cruiser app display any maps on my android screen ?

@victorlysak Offline maps?

Use app's download manager with menu "Map | Offline maps" to download them.

[victorlysak]

if dm gets the .map from internet, where does it put it? what location on disk? my .map files are very customised to remove all the rubbish i don't need. so i need to know what location cruiser is looking for when loading the .map ?

[devemux86]

@victorlysak

i need to know what location cruiser is looking for when loading the .map ?

You can select the storage in "Settings | Application | Advanced | Storage folder".
First enable the "Settings | Application | Extended settings".

You can also open external map files in Cruiser.
Enable the "Settings | Application | Advanced | Extended menu" and use the menu "Map | External maps".