高德地图获取当前屏幕中心点的经纬度

Posted 2020-09-29 mthoutai

公司有个需求就是要随着屏幕的改变而载入附近的商户信息.

那么高德地图获取当前屏幕中心点的经纬度呢?

核心方法:aMap.setOnCameraChangeListener(this);

实现接口:

@Override
public void onCameraChange(CameraPosition position) {
LatLng target = position.target;
System.out.println(target.latitude + "jinjin------" + target.longitude);
}

<span style="font-size:18px;">package com.amap.map2d.demo.basic;
 

import android.app.Activity;
import android.os.Bundle;
import android.util.DisplayMetrics;

import com.amap.api.location.core.GeoPoint;
import com.amap.api.maps2d.AMap;
import com.amap.api.maps2d.AMap.OnCameraChangeListener;
import com.amap.api.maps2d.MapView;
import com.amap.api.maps2d.model.CameraPosition;
import com.amap.api.maps2d.model.LatLng;
import com.amap.map2d.demo.R;
 

/**
 * AMapV1地图中介绍怎样显示一个基本地图
 */
public class BasicMapActivity extends Activity implements OnCameraChangeListener {
	private MapView mapView;
	private AMap aMap;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.basicmap_activity);
		mapView = (MapView) findViewById(R.id.map);
		mapView.onCreate(savedInstanceState);// 此方法必须重写
		
		init();
		
		aMap.setOnCameraChangeListener(this);
	}

	
	
	/**
	 * 初始化AMap对象
	 */
	private void init() {
		if (aMap == null) {
			aMap = mapView.getMap();
		}
	}

	/**
	 * 方法必须重写
	 */
	@Override
	protected void onResume() {
		super.onResume();
		mapView.onResume();
	}

	/**
	 * 方法必须重写
	 */
	@Override
	protected void onPause() {
		super.onPause();
		mapView.onPause();
	}

	/**
	 * 方法必须重写
	 */
	@Override
	protected void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		mapView.onSaveInstanceState(outState);
	}

	/**
	 * 方法必须重写
	 */
	@Override
	protected void onDestroy() {
		super.onDestroy();
		mapView.onDestroy();
	}



	@Override
	public void onCameraChange(CameraPosition position) {
		LatLng target = position.target;
		System.out.println(target.latitude + "jinjin------" + target.longitude);
	}



	@Override
	public void onCameraChangeFinish(CameraPosition position) {
		// TODO Auto-generated method stub
		
	}

}
</span>

结果展示