高德热力图

1.高德开发指南：http://lbs.amap.com/api/android-sdk/guide/draw-on-map/draw-heatmap/

2.开发指南代码：

private MapView mMapView;
    private AMap mAMap;
    private static final int[] ALT_HEATMAP_GRADIENT_COLORS = {
            Color.argb(0, 0, 255, 255),
            Color.argb(255 / 3 * 2, 0, 255, 0),
            Color.rgb(125, 191, 0),
            Color.rgb(185, 71, 0),
            Color.rgb(255, 0, 0)
            };
 
    public static final float[] ALT_HEATMAP_GRADIENT_START_POINTS = { 0.0f,
            0.10f, 0.20f, 0.60f, 1.0f };
 
    public static final Gradient ALT_HEATMAP_GRADIENT = new Gradient(
            ALT_HEATMAP_GRADIENT_COLORS, ALT_HEATMAP_GRADIENT_START_POINTS);
 
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.heatmap_activity);
        mMapView = (MapView) findViewById(R.id.map);
        mMapView.onCreate(savedInstanceState);
        mAMap = mMapView.getMap();
        initDataAndHeatMap();
    }
 
    private void initDataAndHeatMap() {
        LatLng[] latlngs = new LatLng[500];
        double x = 39.904979;
        double y = 116.40964;
  
        for (int i = 0; i < 500; i++) {
            double x_ = 0;
            double y_ = 0;
            x_ = Math.random() * 0.5 - 0.25;
            y_ = Math.random() * 0.5 - 0.25;
            latlngs[i] = new LatLng(x + x_, y + y_);
        }
        HeatmapTileProvider heatmapTileProvider = new HeatmapTileProvider.Builder()
                .data(Arrays.asList(latlngs)).gradient(ALT_HEATMAP_GRADIENT)
 
                .build();
        mAMap.addTileOverlay(new TileOverlayOptions().tileProvider(heatmapTileProvider));
  
    }

3：布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/bai"
    tools:context="myapplication.com.myapp.activity.Detail_Activity">
<com.amap.api.maps.MapView
    android:id="@+id/mapview"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

</com.amap.api.maps.MapView>

</RelativeLayout>

4.下载定位和百度地图开发包文档。这里一共有arm适配arm64—v8a和armeabi。复制到bin下并在gradle加入代码

  sourceSets{
        main{
            jniLibs.srcDirs=['libs']
        }
    }

5.然后在activity中间加入开发指南的代码就可以看到如图：

6.但是在测试时发现在华为荣耀4A上显示不出地图又加入

并把armeabi里面的so文件复制到armeabi-v7a中，运行则可以正常显示地图。