本節主要實現的功能是往地圖上新增一個groundoverlay覆蓋物，用此方式可以實現公園電子導遊，下面先來看一張效果圖吧：

接下來我們還是直接上程式碼：

新建佈局檔案activity_groundoverlay.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.amap.api.maps.MapView
        android:id="@+id/mapView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</LinearLayout>
 

 新建類檔案：GroundOverlayActivity.java

package com.junto.gdmaptest.activity;

import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.Nullable;

import com.amap.api.maps.AMap;
import com.amap.api.maps.CameraUpdateFactory;
import com.amap.api.maps.MapView;
import com.amap.api.maps.model.BitmapDescriptorFactory;
import com.amap.api.maps.model.GroundOverlayOptions;
import com.amap.api.maps.model.LatLng;
import com.amap.api.maps.model.LatLngBounds;
import com.junto.gdmaptest.R;

/**
 * Created by WangJinyong on 2018/10/26.
 * 往地圖上新增一個groundoverlay覆蓋物
 */

public class GroundOverlayActivity extends Activity {

    private MapView mapView;
    private AMap aMap;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_groundoverlay);
        mapView = findViewById(R.id.mapView);
        mapView.onCreate(savedInstanceState);
        initView();
    }

    @Override
    protected void onResume() {
        super.onResume();
        mapView.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        mapView.onPause();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mapView.onDestroy();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        mapView.onSaveInstanceState(outState);
    }

    private void initView(){
        if (aMap == null){
            aMap = mapView.getMap();
            addOverLayToMap();
        }
        aMap.showBuildings(false);
        LatLngBounds latLngBounds = new LatLngBounds(new LatLng(39.935029, 116.384377), new LatLng(39.939577, 116.388331));
        aMap.setMapStatusLimits(latLngBounds);
    }

    //往地圖上新增一個groundoverlay覆蓋物
    private void addOverLayToMap(){
        aMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(39.936713, 116.386475),18));
        LatLngBounds bounds = new LatLngBounds.Builder()//設定顯示在螢幕中的地圖地理範圍,地圖中點顯示為兩個點的中點
                .include(new LatLng(39.935029, 116.384377))
                .include(new LatLng(39.939577, 116.388331)).build();
        aMap.addGroundOverlay(new GroundOverlayOptions()
                .anchor(10.0f, 10.0f)//設定ground覆蓋物的錨點比例，預設為0.5f，水平和垂直方向都居中對齊
                .transparency(0.0f)//設定覆蓋物的透明度，範圍：0.0~1.0
                .zIndex(0)//設定覆蓋物的層次，zIndex值越大越在上層；
                .image(BitmapDescriptorFactory.fromResource(R.mipmap.groundoverlay))//覆蓋物圖片
                .positionFromBounds(bounds));
    }
}
 

在這裡順便把覆蓋物的圖片也附上一張，這個圖片需要根據實際需求設計來做的，在這裡只是為了方便做demo來實現類似效果

 本節到這裡又結束啦，是不很簡單