How to extends ResourceProxy interface in osmdroid?

Question

yea, i know, another thread about changing icons in osmdroid. But there isn't any good explanation available !

I made lot of research and it is a frequently asked topic. Why not make a clear answer at this point for all user who need to specify their own resources ?

All stuff available is to "Have a look at ResourceProxy.java" or "Pass the bitmap to constructor". No way, it doesn't work for me, I don't even know how a simple interface could find my drawable in my res folder ! I tried to pass some .PNG files with the same names as osmdroid (like "person.png") but when I run the app I have still the default resource.

Can someone explain clearly how to write "our own ResourceProxy" step by step ? Not brievely like that because I followed the steps and didn't manage to success.

I know that osmdroid was fixed recently in github but the .aar is older than the fix. Here you can find the Resource Proxy class.

spy · Accepted Answer · 2015-10-18T13:07:58.610

When you create in an instance of the MapView, you need to pass in a reference to a implementation of "ResourceProxy". By default, it loads the "DefaultResourceProxyImpl". To override, create a new class that extends DefaultResourceProxyImpl and then you can override getBitmap and getDrawable. There is actually is an example that overrides the DefaultResourceProxyImpl here:

https://github.com/osmdroid/osmdroid/blob/master/OpenStreetMapViewer/src/main/java/org/osmdroid/ResourceProxyImpl.java

Just for you, I'm working on including such an example with the osmdroid example app. It's going to look something like this

 public class CustomResourceProxy extends DefaultResourceProxyImpl {

      private final Context mContext;
      public CustomResourceProxy(Context pContext) {
           super(pContext);
        mContext = pContext;
      }

      @Override
    public Bitmap getBitmap(final bitmap pResId) {
        switch (pResId){
                case person:
                     //your image goes here!!!
                     return BitmapFactory.decodeResource(mContext.getResources(),org.osmdroid.example.R.drawable.sfgpuci);

           }
           return super.getBitmap(pResId);
    }

    @Override
    public Drawable getDrawable(final bitmap pResId) {
        switch (pResId){
                case person:
                     //your image goes here!!!
                     return mContext.getResources().getDrawable(org.osmdroid.example.R.drawable.sfgpuci);
           }
           return super.getDrawable(pResId);
    }

 }

Edit: done See https://github.com/osmdroid/osmdroid/blob/master/OpenStreetMapViewer/src/main/java/org/osmdroid/CustomResourceProxy.java

Edit: Edit: Wiki updated, see https://github.com/osmdroid/osmdroid/wiki/How-to-use-the-osmdroid-library

How to extends ResourceProxy interface in osmdroid?

1 Answers1