Android调用高德地图定位的方法

在App中使用地图定位十分常见，购物功能的可以直接定位当前位置，发动态功能可以定位当前位置发出，社交功能可以定位周边用户等等。这里我使用高德地图定位当前位置并显示地址和经纬度。

github代码传送门

先上效果图：

实现步骤：

1. 创建应用获取key：

接入第三方无一例外，去高德地图官网注册账号并创建应用。填入包名和keystore的Sha1。

创建应用

获取Sha1，输入命令keytool -v -list -keystore keystore文件路径，我在这里通过控制台获取调试版的：

进入.android目录

cd .android

输入命令获取

keytool -v -list -keystore debug.keystore

过程截图：

创建完成获取Key：

2. 接入SDK

添加定位库

compile 'com.amap.api:location:latest.integration'

添加2D地图库

compile 'com.amap.api:map2d:latest.integration'

添加地图权限：

 <uses-permission android:name="android.permission.INTERNET" />
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
 <uses-permission android:name="android.permission.READ_PHONE_STATE" />
 <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
 <uses-permission android:name="android.permission.CHANGE_CONFIGURATION" />
 <uses-permission android:name="android.permission.WAKE_LOCK" />
 <uses-permission android:name="android.permission.WRITE_SETTINGS" />

在<application></application>中设置地图key

  <meta-data
   android:name="com.amap.api.v2.apikey"
   android:value="57b811b21061501ee320e171568f0dac" />

3. 代码实现（带每一步功能注释）：

实现思路：创建MapView显示地图；设置定位定位监听，设置定位参数，在activate激活后启动定位；在定位回调中获取经纬度，在将地图移动到定位位置，在该经纬度上添加覆盖图标。详细代码如下：

地图控件：

  <com.amap.api.maps2d.MapView
    android:id="@+id/mapview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

定位类AmapActivity完整代码：

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.amap.api.location.AMapLocation;
import com.amap.api.maps2d.AMap;
import com.amap.api.maps2d.CameraUpdateFactory;
import com.amap.api.maps2d.LocationSource;
import com.amap.api.maps2d.MapView;
import com.amap.api.maps2d.model.LatLng;

public class AmapActivity extends AppCompatActivity implements LocationSource {
  private MapView mapView;
  private AMap aMap;
  private LocationSource.OnLocationChangedListener mListener = null;//定位监听器
  private LocationUtil locationUtil;

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

    mapView = (MapView) findViewById(R.id.mapview);
    mapView.onCreate(savedInstanceState);

    init();
  }

  private void init() {
    if(aMap == null){
      aMap = mapView.getMap();
    }

    setLocationCallBack();

    //设置定位监听
    aMap.setLocationSource(this);
    //设置缩放级别
    aMap.moveCamera(CameraUpdateFactory.zoomTo(15));
    //显示定位层并可触发，默认false
    aMap.setMyLocationEnabled(true);
  }

  private void setLocationCallBack(){
    locationUtil = new LocationUtil();
    locationUtil.setLocationCallBack(new LocationUtil.ILocationCallBack() {
      @Override
      public void callBack(String str,double lat,double lgt,AMapLocation aMapLocation) {

        //根据获取的经纬度，将地图移动到定位位置
        aMap.moveCamera(CameraUpdateFactory.changeLatLng(new LatLng(lat,lgt)));
        mListener.onLocationChanged(aMapLocation);
        //添加定位图标
        aMap.addMarker(locationUtil.getMarkerOption(str,lat,lgt));
      }
    });
  }

  //定位激活回调
  @Override
  public void activate(OnLocationChangedListener onLocationChangedListener) {
    mListener = onLocationChangedListener;

    locationUtil.startLocate(getApplicationContext());
  }

  @Override
  public void deactivate() {
    mListener = null;
  }

  @Override
  protected void onPause() {
    super.onPause();
    //暂停地图的绘制
    mapView.onPause();
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    //销毁地图
    mapView.onDestroy();
  }

  @Override
  protected void onResume() {
    super.onResume();
    //重新绘制加载地图
    mapView.onResume();
  }

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

定位参数设置和定位回调LocationUtil类完整代码：

import android.content.Context;
import android.util.Log;
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.maps2d.model.BitmapDescriptorFactory;
import com.amap.api.maps2d.model.LatLng;
import com.amap.api.maps2d.model.MarkerOptions;

/**
 * Created by libo on 2018/2/2.
 */

public class LocationUtil implements AMapLocationListener {
  private AMapLocationClient aMapLocationClient;
  private AMapLocationClientOption clientOption;
  private ILocationCallBack callBack;

  public void startLocate(Context context){
    aMapLocationClient = new AMapLocationClient(context);

    //设置监听回调
    aMapLocationClient.setLocationListener(this);

    //初始化定位参数
    clientOption = new AMapLocationClientOption();
    clientOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Battery_Saving);
    clientOption.setNeedAddress(true);
    clientOption.setOnceLocation(false);
    //设置是否强制刷新WIFI，默认为强制刷新
    clientOption.setWifiActiveScan(true);
    //设置是否允许模拟位置,默认为false，不允许模拟位置
    clientOption.setMockEnable(false);
    //设置定位间隔
    clientOption.setInterval(2000);
    aMapLocationClient.setLocationOption(clientOption);

    aMapLocationClient.startLocation();
  }

  //完成定位回调
  @Override
  public void onLocationChanged(AMapLocation aMapLocation) {
    if(aMapLocation != null){
      if(aMapLocation.getErrorCode() == 0){
        //定位成功完成回调
        String country = aMapLocation.getCountry();
        String province = aMapLocation.getProvince();
        String city = aMapLocation.getCity();
        String district = aMapLocation.getDistrict();
        String street = aMapLocation.getStreet();
        double lat = aMapLocation.getLatitude();
        double lgt = aMapLocation.getLongitude();

        callBack.callBack(country + province + city + district + street,lat,lgt,aMapLocation);
      }else{
        //显示错误信息ErrCode是错误码，errInfo是错误信息，详见错误码表。
        Log.e("AmapError", "location Error, ErrCode:"
            + aMapLocation.getErrorCode() + ", errInfo:"
            + aMapLocation.getErrorInfo());
      }
    }
  }

  /**
   * 自定义图标
   * @return
   */
  public MarkerOptions getMarkerOption(String str,double lat,double lgt){
    MarkerOptions markerOptions = new MarkerOptions();
    markerOptions.icon(BitmapDescriptorFactory.fromResource(R.mipmap.position));
    markerOptions.position(new LatLng(lat,lgt));
    markerOptions.title(str);
    markerOptions.snippet("纬度:" + lat + "  经度:" + lgt);
    markerOptions.period(100);

    return markerOptions;
  }

  public interface ILocationCallBack{
    void callBack(String str,double lat,double lgt,AMapLocation aMapLocation);
  }

  public void setLocationCallBack(ILocationCallBack callBack){
    this.callBack = callBack;
  }

}

错误情况检查：

1. Key是否配置错误
2. 在onCreate中调用mapView.onCreate(savedInstanceState);
3. mapView.onPause()、mapView.onDestroy()、mapView.onResume()、mapView.onSaveInstanceState(outState)是否都已调用且不写错
4. aMap.setMyLocationEnabled(true)设置显示定位层并可触发
5. 手机是否开启定位

好了，调用地图的基本功能完成，更高级的功能还包括Poi检索，附近搜索，路线规划，后续会继续完善该功能。以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。

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