如何在 Android 中的 MapView 上覆盖 GLSurfaceView? [英] How to overlay GLSurfaceView over a MapView in Android?

问题描述

我想在 android 中创建一个简单的基于地图的应用程序，我可以在其中显示我当前的位置.我想在 MapView 上覆盖 GLSurfaceView，而不是在 MapView 上覆盖一个简单的图像来表示位置.但我不知道如何实现这一点.有没有办法做到这一点?请任何知道解决方案的人帮助我.

I want to create a simple Map based application in android ,where i can display my current position.Instead of overlaying a simple Image on the MapView to represent the position, i want to overlay the GLSurfaceView on the MapView. But i don't know how to achieve this. Is there any way to do that?. Please anybody knows the solution help me.

推荐答案

在查看文档并意识到 MapView extends ViewGroup 之前，我遇到了类似的问题，因此覆盖 GlSurfaceView 实际上最终变得非常简单.

I was stuck on a similar problem until I looked at the documentation and realized that MapView extends ViewGroup, so overlaying a GlSurfaceView actually ends up being pretty trivial.

MapView.addView(...) 和 MapView.LayoutParams 允许您做一些非常有用的事情，例如在特定位置放置 ViewGeoPoint 在地图上.

MapView.addView(...) and MapView.LayoutParams allow you to some pretty useful things like place a View at a specific GeoPoint on the map.

更多文档:https://developers.google.com/maps/documentation/android/reference/com/google/android/maps/MapView.LayoutParams.html

这就是我所做的:

@Override
protected void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mapview);

    MapView map_view = (MapView) findViewById(R.id.map_view);

    CustomGlView gl_view = new CustomGlView(this);

    // This is where the action happens.
    map_view.addView(gl_view, new MapView.LayoutParams(
            MapView.LayoutParams.FILL_PARENT, 
            MapView.LayoutParams.FILL_PARENT, 
            0,0, 
            MapView.LayoutParams.TOP_LEFT
            )
        );
}

此外，还可以按照上述解决方案的规定进行操作.我对 GlSurfaceView 进行了子分类，所以我的看起来略有不同:

Plus also do what the solution above states. I sub-classed GlSurfaceView, so mine looks slightly different:

public CustomGlView(Context context) {
    super(context);
    YourCustomGlRenderer renderer = new YourCustomGlRenderer();
    setEGLConfigChooser(8, 8, 8, 8, 16, 0);
    setRenderer(renderer);
    getHolder().setFormat(PixelFormat.TRANSLUCENT);

    // Have to do this or else 
    // GlSurfaceView wont be transparent.
    setZOrderOnTop(true);  
}

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