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
代码语言：javascript复制cd .android输入命令获取
代码语言：javascript复制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
代码语言：javascript复制compile 'com.amap.api:location:latest.integration'添加2D地图库
代码语言：javascript复制compile 'com.amap.api:map2d:latest.integration'添加地图权限：
代码语言：javascript复制 <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
代码语言：javascript复制 <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：
代码语言：javascript复制 <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：
代码语言：javascript复制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：
代码语言：javascript复制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：
- Key是否配置错误
- 在onCreate中调用mapView.onCreate(savedInstanceState);
- mapView.onPause()、mapView.onDestroy()、mapView.onResume()、mapView.onSaveInstanceState(outState)是否都已调用且不写错
- aMap.setMyLocationEnabled(true)设置显示定位层并可触发
- 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。
