262.高德地圖的使用

參考文檔：

https://lbs.amap.com/api/android-location-sdk/guide/android-location/getlocation

https://lbs.amap.com/api/android-sdk/guide/draw-on-map/draw-marker

啓動定位服務器

//啓動定位服務器
protected  void doLocation()
{
	//1 創建一個客戶端定位句柄
	_amapLocationClient = new AMapLocationClient(getApplicationContext());

	//2 給客戶端句柄設置一個listenner來處理服務器返回的定位數據
	_amapLocationClient.setLocationListener(new AMapLocationListener() {
		@Override
		public void onLocationChanged(AMapLocation aMapLocation) {
			//onLocationChanged 就是如果服務器給客戶端返回數據，調用的回調函數
			//aMapLocation 就是服務器給客戶端返回的定位數據

			if (aMapLocation != null) {
				//服務器是有響應的

				if(aMapLocation.getErrorCode() == 0) {
					//定位成功，aMapLocation獲取數據
					Log.e("Amap", "location succ address = "+ aMapLocation.getAddress());
					Log.e("Amap", "city = "+ aMapLocation.getCity());
					Log.e("Amap", "longtitude = " + aMapLocation.getLongitude());
					Log.e("Amap", "latitude = " + aMapLocation.getLatitude());

				}
				else {
					//定位失敗，

					Log.e("Amap", "location error, code = "+ aMapLocation.getErrorCode()+
							", info = "+ aMapLocation.getErrorInfo());
				}
			}
		}
	});

	//3 開啓定位服務
	_amapLocationClient.startLocation();
}

向固定的經緯度添加一個標記，添加一個位置的圖片

//向固定的經緯度添加一個標記
    protected void addMarkerToMap(double latitude, double longitude)
    {
        _selfMarker = _amap.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude))
                .icon(BitmapDescriptorFactory.fromBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.location_marker))));
    }

以某個經緯度爲中心來展示地圖

//以某個經緯度爲中心來展示地圖
    protected void moveMap(double latitude, double longtiude)
    {
        LatLng lagLng = new LatLng(latitude, longtiude);

        //移動amap地圖 以之前的縮放比例展示
        _amap.animateCamera(CameraUpdateFactory.newLatLngZoom(lagLng, _amap.getCameraPosition().zoom));
    }

獲取服務器返回的定位數據

//2 給客戶端句柄設置一個listenner來處理服務器返回的定位數據
_amapLocationClient.setLocationListener(new AMapLocationListener() {
	@Override
	public void onLocationChanged(AMapLocation aMapLocation) {
		//onLocationChanged 就是如果服務器給客戶端返回數據，調用的回調函數
		//aMapLocation 就是服務器給客戶端返回的定位數據

		if (aMapLocation != null) {
			//服務器是有響應的

			if(aMapLocation.getErrorCode() == 0) {
				//定位成功，aMapLocation獲取數據
				Log.e("Amap", "location succ address = "+ aMapLocation.getAddress());
				Log.e("Amap", "city = "+ aMapLocation.getCity());
				Log.e("Amap", "longtitude = " + aMapLocation.getLongitude());
				Log.e("Amap", "latitude = " + aMapLocation.getLatitude());

			}
			else {
				//定位失敗，

				Log.e("Amap", "location error, code = "+ aMapLocation.getErrorCode()+
						", info = "+ aMapLocation.getErrorInfo());
			}
		}
	}
});

DriverActivity.java

package com.ldw.hello;

import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import com.amap.api.location.AMapLocation;
import com.amap.api.location.AMapLocationClient;
import com.amap.api.location.AMapLocationClientOption;
import com.amap.api.location.AMapLocationListener;
import com.amap.api.maps.AMap;
import com.amap.api.maps.AMapOptions;
import com.amap.api.maps.CameraUpdateFactory;
import com.amap.api.maps.MapView;
import com.amap.api.maps.UiSettings;
import com.amap.api.maps.model.BitmapDescriptorFactory;
import com.amap.api.maps.model.LatLng;
import com.amap.api.maps.model.Marker;
import com.amap.api.maps.model.MarkerOptions;

public class DriverActivity extends AppCompatActivity {

    //創建一個地圖容器MapView對象
    private MapView _mapView = null;
    //地圖的UISetting對象 給amap設置地圖內嵌控件
    private UiSettings _uiSettings = null;
    //地圖對象
    private AMap _amap = null;

    //定位服務器客戶端句柄
    private AMapLocationClient _amapLocationClient = null;
    //定位服務器客戶端句柄屬性
    private AMapLocationClientOption _amapLocationOption = null;

    //顯示自我位置的圖標
    private Marker _selfMarker = null;



    boolean isAddSelfMarker = false;
    int flag = 0;
    int traffic_flag = 0;


    protected void initUI() {
        //將地圖容器跟MapView控件相關聯
        _mapView = (MapView) findViewById(R.id.DriverMap);

    }

    protected void createMap(Bundle savedInstanceState) {
        //展示地圖容器
        _mapView.onCreate(savedInstanceState);


        //得到amap對象
        _amap = _mapView.getMap();

        //默認顯示實時交通信息
        _amap.setTrafficEnabled(true);


        //得到UISettings
        _uiSettings = _amap.getUiSettings();

        //添加一個指南針控件
        _uiSettings.setCompassEnabled(true);

        //添加一個縮放比例尺
        _uiSettings.setScaleControlsEnabled(true);

        //修改logo位置
        _uiSettings.setLogoPosition(AMapOptions.LOGO_POSITION_BOTTOM_RIGHT);

    }

    //以某個經緯度爲中心來展示地圖
    protected void moveMap(double latitude, double longtiude)
    {
        LatLng lagLng = new LatLng(latitude, longtiude);

        //移動amap地圖 以之前的縮放比例展示
        _amap.animateCamera(CameraUpdateFactory.newLatLngZoom(lagLng, _amap.getCameraPosition().zoom));
    }

    //向固定的經緯度添加一個標記
    protected void addMarkerToMap(double latitude, double longitude)
    {
        _selfMarker = _amap.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude))
                .icon(BitmapDescriptorFactory.fromBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.location_marker))));
    }

    //啓動定位服務器
    protected  void doLocation()
    {
        //1 創建一個客戶端定位句柄
        _amapLocationClient = new AMapLocationClient(getApplicationContext());

        //1.5 給定位客戶端設置一些屬性
        _amapLocationOption = new AMapLocationClientOption();
        //每個5s定位一次
        _amapLocationOption.setInterval(3000);
        //_amapLocationOption.setOnceLocation(true);

        //將option設置給client對象
        _amapLocationClient.setLocationOption(_amapLocationOption);

        //2 給客戶端句柄設置一個listenner來處理服務器返回的定位數據
        _amapLocationClient.setLocationListener(new AMapLocationListener() {
            @Override
            public void onLocationChanged(AMapLocation aMapLocation) {
                //onLocationChanged 就是如果服務器給客戶端返回數據，調用的回調函數
                //aMapLocation 就是服務器給客戶端返回的定位數據

                if (aMapLocation != null) {
                    //服務器是有響應的

                    if(aMapLocation.getErrorCode() == 0) {
                        //定位成功，aMapLocation獲取數據
                        Log.e("Amap", "location succ address = "+ aMapLocation.getAddress());
                        Log.e("Amap", "city = "+ aMapLocation.getCity());
                        Log.e("Amap", "longtitude = " + aMapLocation.getLongitude());
                        Log.e("Amap", "latitude = " + aMapLocation.getLatitude());

                        if (isAddSelfMarker == false) {
                            //在此位置添加一個標記
                            addMarkerToMap(aMapLocation.getLatitude(), aMapLocation.getLongitude());
                            isAddSelfMarker = true;

                            //以自我爲中心展示地圖
                            moveMap(aMapLocation.getLatitude(), aMapLocation.getLongitude());
                        }



                    }
                    else {
                        //定位失敗，

                        Log.e("Amap", "location error, code = "+ aMapLocation.getErrorCode()+
                                ", info = "+ aMapLocation.getErrorInfo());
                    }
                }
            }
        });

        //3 開啓定位服務
        _amapLocationClient.startLocation();
    }

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

        initUI();

        createMap(savedInstanceState);

        doLocation();

    }

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

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

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

        _mapView.onPause();
    }

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

        _mapView.onSaveInstanceState(outState);
    }
}