add marker on map using mapsforge

[arra...@gmail.com]

hello, im newbie in android dev. now, i want build some map app using mapsforge. i just following this step https://github.com/mapsforge/mapsforge/blob/master/docs/Getting-Started-Android-App.md and now i want to add marker on LatLong. can anyone help me or explain how to show it ? sorry for may bad english

[Emux]

You can study mapsforge-samples-android collection of Mapsforge examples which show how to use its API in various cases.

Specifically for overlays (like markers) the related example is OverlayMapViewer.

--
Emux

[Emux]

On 07/03/2017 09:07 πμ, arra...@gmail.com wrote:

thanks for answer for my question. can i ask you another question ? now i want to add button on my activity_main.xml but program read file.map and when i add button it didn't show. how can i add button and show it on map ?

See in mapsforge-samples-android the layouts mapviewer.xml or rotatemapviewer.xml.

Essentially you can handle map view as any other Android view and place it in various layouts.

--
Emux

[arra...@gmail.com]

when i add 

<org.mapsforge.map.android.view.MapView
	android:id="@+id/mapView"
	android:layout_width="fill_parent"
	android:layout_height="fill_parent" />

on my main.xml it show rendering problems the classes could not be instantiated

[Emux]

Are you sure all needed Mapsforge dependencies are in your classpath?

--
Emux

[arra...@gmail.com]

i added library and build path to my project but it still same

[Emux]

When you mentioned rendering problems I assumed running the app on a device or emulator.

What image shows is trying to draw the map view in the visual user interface builder of a developer IDE.
So that's an harmless issue only for the layout designer.
It does not prevent creating a layout or running the application and it does not mean that the classes are not visible for the code.

Is the application working?

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Emux

[arra...@gmail.com]

application run well but main.xml mentioned rendering problems 

[arra...@gmail.com]

i think it doesn't matter if the app run well.
 
but how limit the map so there's no grey area appear on my app when i scroll  down/up

[Emux]

On 08/03/2017 10:02 πμ, arra...@gmail.com wrote:

but how limit the map so there's no grey area appear on my app when i scroll  down/up

I don't know your code or layout implementation.

Please check or run mapsforge-samples-android to see how all that can work.

--
Emux

[arra...@gmail.com]

i mean how can i limit the map by bounding box on my app. which class i should study on mapsforge-samples-android ?

[Emux]

Do you want to limit the map view space on screen, like make it occupying part of the screen?
You can have a look at DualMapViewer example.

Or you want to limit map bounds while panning the map?

mapView.getModel().mapViewPosition.setMapLimit(BoundingBox);

--
Emux

[arra...@gmail.com]

yes i want to limit the map  view space on screen. so, only my map appear. on screen and there's no blank space or grey space like picture that i send.

[Emux]

On 08/03/2017 11:48 πμ, arra...@gmail.com wrote:

yes i want to limit the map  view space on screen. so, only my map appear. on screen and there's no blank space or grey space like picture that i send.

Then you need to play with regular Android layout rules for hosting properly the view, like we do here.

--
Emux

[arra...@gmail.com]

what about limit map bounds? what should i do with 

mapView.getModel().mapViewPosition.setMapLimit(BoundingBox);

[Emux]

You can pass a BoundingBox class with the coordinates you want the map pan to stop.

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Emux

[Emux]

I pushed some internal changes in Mapsforge.

Android MapView should not have issues now in IDE layout designers.

You'd need to use the latest snapshot build (see guide) for that.

(Don't forget to clean / rebuild for the changes to take effect)

--
Emux

[arra...@gmail.com]

it still mentioned rendering probloms on my case

[Emux]

Have you used Mapsforge SNAPSHOT builds?

And it's important to clean / rebuild the project.

Probably you have to force Gradle to check for latest snapshot, like mentioned in the guide.

BTW mapsforge-samples-android work fine in layout designer.

--
Emux

[arra...@gmail.com]

 try to follow  guide but when i add "compile 'org.mapsforge:mapsforge-core:master-SNAPSHOT'" on my gradle.app and sync it mentioned "gradle project sync failed" .  

[Emux]

Have you made the above steps in the guide?

Like adding the extra repository?

--
Emux

[arra...@gmail.com]

can you give me explanation how to used Mapsforge SNAPSHOT builds ? 

[arra...@gmail.com]

yes, i added extra repository on my gradle, i try to follow integration guide but still same

[Emux]

Can you post here your build.gradle?

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Emux

[arra...@gmail.com]

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "25.0.2"

    defaultConfig {
        applicationId "com.example.ismile05.maps"
        minSdkVersion 15
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile files('libs/mapsforge-core-0.7.0.jar')
    compile files('libs/mapsforge-map-android-0.7.0.jar')
    compile files('libs/mapsforge-map-0.7.0.jar')
    compile files('libs/mapsforge-themes-0.7.0.jar')
    compile files('libs/mapsforge-map-reader-0.7.0.jar')
    compile files('libs/androidsvg-1.2.2-beta-1.jar')
    compile files('libs/mapsforge-map-android-extras-0.7.0.jar')
    compile files('mapsforge-map-android-0.7.0.jar')
    compile files('libs/vtm-0.7.0.jar')
    compile files('libs/vtm-android-0.7.0.jar')
    compile files('libs/vtm-android-0.7.0-natives-armeabi.jar')
    compile files('libs/vtm-android-0.7.0-natives-armeabi-v7a.jar')
    compile files('libs/vtm-android-0.7.0-natives-x86.jar')
    compile files('libs/mapsforge-map-android-master-20170308.105247-91.jar')
}

[arra...@gmail.com]

where should i put SNAPSHOT builds on my gradle?

[Emux]

- Where is the extra repository defined?

- Better not mix Mapsforge and VTM together, they're two different frameworks

- One declaration per library is needed, e.g. there are 3 map-android jars

- To use snapshots you need to remove the jars and use the statements in the guide replacing [CURRENT-VERSION] with master-SNAPSHOT

--
Emux

[Emux]

Could you try removing all jars in "libs" sub-folder and replacing the dependencies section with the following:

repositories {
    maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }

}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:21.0.3'

    compile 'org.mapsforge:mapsforge-core:master-SNAPSHOT'
    compile 'org.mapsforge:mapsforge-map:master-SNAPSHOT'
    compile 'org.mapsforge:mapsforge-map-reader:master-SNAPSHOT'
    compile 'org.mapsforge:mapsforge-themes:master-SNAPSHOT'
    compile 'net.sf.kxml:kxml2:2.3.0'

    compile 'org.mapsforge:mapsforge-map-android:master-SNAPSHOT'
    compile 'com.caverock:androidsvg:1.2.2-beta-1'
}

--
Emux

[arra...@gmail.com]

thank you very much emux!   so, we don't use jars in libs folder ?

[Emux]

Usually it's more convenient to avoid jars and it makes app maintenance far more easier, just need to change string versions instead of replacing files.

So if going that way you can empty the libs folder completely.

--
Emux

[arra...@gmail.com]

hmm thank you for your exlpanation. 

I'm developing a route search application using search algorithms such as greedy or Djikstra. Can I apply the algorithm to application?

[Emux]

What do you mean?

Using Mapsforge map files for routing is not possible.
You'd need a routing library like GraphHopper.

--
Emux

[arra...@gmail.com]

i mean, i want to build map and navigation application. 

[arra...@gmail.com]

so, can we integrate with graphhoper for routing ?

[Emux]

On 14/03/2017 07:23 πμ, arra...@gmail.com wrote:

so, can we integrate with graphhoper for routing ?

Certainly, you can check GraphHopper Android sample using Mapsforge for map view and overlay the route.

--
Emux

[Emux]

For GraphHopper specific questions you could ask in its forum providing also more details for any issue, like the logcat with exceptions, etc.

--
Emux

[arra...@gmail.com]

Hi Emux, how can i remove markers from layer?

[Emux]

You can see the various methods of Layers class, like:

mapView.getLayerManager().getLayers().remove ...

--
Emux

[arra...@gmail.com]

can you please give me an example or show me Layers class? 

[Emux]

Layers class can be seen in repository here.

Examples of overlays are many in mapsforge-samples-android (which is recommended to study), like OverlayMapViewer or LongPressAction.

--
Emux

[arra...@gmail.com]

i'm sorry but i realy don't understand how to use it.

i have code to add marker : 

Marker markerHydrant = Utils.createMarker(this, R.drawable.marker_hydrant,new LatLong(cn.getLatitude(),cn.getLongitude()));
layers.add(markerHydrant);

and this code on onStart()
LocationMarker(mapView.getLayerManager().getLayers());

now, i want to remove these marker.

[Emux]

You can use layers.remove(markerHydrant);

--
Emux

[arra...@gmail.com]

hi emux, i trying to draw a line on my map. but when i add other line, its connect to the first one. i want to make it separate. so there's is 2 diferent line

[Emux]

If you want to overlay separate lines why don't you use different Polyline layers, each with its own set of coordinates.

--
Emux

[arra...@gmail.com]

okey, but if i want to use one polyline layer is it possible?

[Emux]

No as current implementation of Polyline layer handles a single line, not a collection of lines.

That would need a new "Polylines" implementation, not a bad idea, if you want can create an issue for that.

--
Emux

[arra...@gmail.com]

hi emux, i have some marker on my map. i want make it show different information using alertdialog for each marker. can you please give me a idea ?

[Emux]

The OverlayMapViewer has the examples for how to use the marker tap and long press events.

You need the markers to include also any extra information, e.g. extend the Marker class and add title or description fields.

--
Emux

[arra...@gmail.com]

hi emux, can i add traffic layer from google map api to my map?

[Emux]

Adding custom raster tile sources in Mapsforge is easy, just need to create their implementation, e.g. OpenStreetMapMapnik.

But Google Maps terms of service mean to use their maps only inside their map library?

--
Emux

[arra...@gmail.com]

sorry, can you explain what openstreetmapmapnik is ? 

[Emux]

It's a class defining the properties of an online bitmap tile source.

In the specific example the OpenStreetMap "Standard" bitmap layer.

Can be used with Mapsforge as seen in DownloadLayerViewer example in mapsforge-samples-android.

Better don't be confused with it, if you need to define custom tile sources, an easier way can be seen in DownloadCustomLayerViewer example.

--
Emux

[arra...@gmail.com]

so, using openstreetmapmapnink we can upload our costum layer and using it online ? 

[Emux]

If you have a web server to host your custom made layer's tiles, you could write then a tile source (like in above links) and load it to Mapsforge.

--
Emux

[arra...@gmail.com]

hi emux, how to get lat long when i tap the map or make a marker by tapping ?

[Emux]

You can check OverlayMapViewer sample which has Mapsforge overlay examples with touch events too.

--
Emux

[arra...@gmail.com]

I mean, when i click whereever on my map, i can get that lat long. not tapable marker

[Emux]

Then you need to add the touch listener to the map tile layer, e.g. see LongPressAction example.

--
Emux

[arra...@gmail.com]

i've add LongPreesAction code but why there's error on tileCache.get(0) ? when i try to running the app using tileCache it show exception java.lang.IllegalArgumentException: tileCache must not be null 

[Emux]

It depends on how you use the Mapsforge library in your project (need to provide a cache).

You can either check how the above example works (study its code) or use your own implementation (like in getting started guide).

--
Emux

[arra...@gmail.com]

hi emux, i want to make my marker look like moving following changes of LatLong. how can i make it look like moving ? 

[Emux]

You can use Marker.setLatLong to change its coordinates and then do:

mapView.getLayerManager().redrawLayers();

--
Emux

[arra...@gmail.com]

hi emux, how can i make my location marker move followed gps on mapsforge ? i use handler to handle coordinate changes. 

[Emux]

You can check LocationOverlayMapViewer in Mapsforge samples, it enables the follow location mode.

--
Emux

[arra...@gmail.com]

i've follow LocationOverlayMapView samples but my location marker not appear

[Emux]

You need to study the sample and the used MyLocationOverlay, comparing with your implementation.

The sample works, so check how you have integrated it.

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Emux