大家好,又见面了,我是你们的朋友全栈君。
这里使用的SDK为AMap_Location_V2.5.0_20160526.jar
没有接触过高德地图的同学,请参考
加载一张高德地图
1.获取我的位置
package com.pansoft.oilgas.gaodenavigation;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
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 java.text.SimpleDateFormat;
import java.util.Date;
public class QueryCurrentLocationActivity extends AppCompatActivity implements AMapLocationListener {
private AMapLocationClientOption mLocationOption = null;
private AMapLocationClient mLocationClient = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLocationClient = new AMapLocationClient(this);
//初始化定位参数
mLocationOption = new AMapLocationClientOption();
//设置定位监听
mLocationClient.setLocationListener(this);
/*设置定位模式为高精度模式,Battery_Saving为低功耗模式,Device_Sensors是仅设备模式*/
mLocationOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);
//设置定位间隔,单位毫秒,默认为2000ms
mLocationOption.setInterval(2000);
//设置定位参数
mLocationClient.setLocationOption(mLocationOption);
/* 此方法为每隔固定时间会发起一次定位请求,为了减少电量消耗或网络流量消耗,注意设置合适的定位时间的间隔(最小间隔支持为2000ms),并且在合适时间调用stopLocation()方法来取消定位请求,在定位结束后,在合适的生命周期调用onDestroy()方法 在单次定位情况下,定位无论成功与否,都无需调用stopLocation()方法移除请求,定位sdk内部会移除启动定位*/
mLocationClient.startLocation();
}
@Override
public void onLocationChanged(AMapLocation amapLocation) {
if (amapLocation != null) {
if (amapLocation.getErrorCode() == 0) {
//定位成功回调信息,设置相关消息
amapLocation.getLocationType();
//获取当前定位结果来源,如网络定位结果,详见定位类型表
amapLocation.getLatitude();//获取纬度
amapLocation.getLongitude();//获取经度
amapLocation.getAccuracy();//获取精度信息
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = new Date(amapLocation.getTime());
df.format(date);//定位时间
} 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());
}
}
}
}
ok,执行以下!
不好了,缺少定位权限,是没有在AndroidManifest文件中声明定位权限吗?不是,是Android6.0中将用户权限分为普通权限和危险权限,这里定位权限属于危险权限,需要在使用的时候进行动态申请。
对Android6定位权限不熟悉的同学请参考
2.动态申请定位权限
public void requestLocationPermission(){
ActivityCompat.requestPermissions(this,new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},REQ_LOCATION);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if(requestCode==REQ_LOCATION){
if(grantResults!=null&&grantResults.length>0){
if(grantResults[0]== PackageManager.PERMISSION_GRANTED){
mLocationClient.startLocation();
}else{
Toast.makeText(QueryCurrentLocationActivity.this,"缺少定位权限,无法完成定位~",Toast.LENGTH_LONG).show();
}
}
}
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
3.展示获取到的位置数据
定义一个DialogFragment展示数据,不熟悉DialogFragment的同学请参考
AltertDialog在DialogFragment中的使用
package com.pansoft.oilgas.gaodenavigation;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
import com.amap.api.location.AMapLocation;
public class ShowLocationFragment extends DialogFragment {
public static final String KEY_MSG = "location msg";
private AMapLocation currentLocation;
public ShowLocationFragment() {
// Required empty public constructor
}
public static ShowLocationFragment newInstance(AMapLocation currentLocation) {
ShowLocationFragment fragment = new ShowLocationFragment();
Bundle args = new Bundle();
args.putParcelable(KEY_MSG,currentLocation);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
currentLocation =getArguments().getParcelable(KEY_MSG);
}
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder=new AlertDialog.Builder(getActivity());
builder.setTitle("当前位置信息");
builder.setMessage(currentLocation.getCity()+"\n"
+currentLocation.getAddress()+"\n"
+"当前经纬度: "+currentLocation.getLatitude()+","+currentLocation.getLongitude()+"\n"
);
builder.setPositiveButton("知道了", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
}
});
return builder.create();
}
}
在onLocationChange成功获取数据后,调用
ShowLocationFragment showFragment=ShowLocationFragment.newInstance(amapLocation);
showFragment.show(getFragmentManager(),"xxxx");
展示数据
ok,初见成效!
4.在地图上标注我的位置
在原来代码的基础上,添加地图MapView
不熟悉的同学,请参考
加载一张高德地图
在onCreate中添加,获取我的位置的相关部分
// show my location
aMap.setLocationSource(this);
aMap.getUiSettings().setMyLocationButtonEnabled(true);
aMap.setMyLocationEnabled(true);
aMap.setMyLocationType(AMap.LOCATION_TYPE_MAP_FOLLOW);
在QueryCurrentLocationActivity 中实现LocationSource接口
@Override
public void activate(OnLocationChangedListener onLocationChangedListener) {
this.onLocationChangedListener=onLocationChangedListener;
}
@Override
public void deactivate() {
if(mLocationClient!=null){
mLocationClient.stopLocation();
mLocationClient.onDestroy();
}
}
在定位成功后——onLocationChanged内刷新位置
if(onLocationChangedListener!=null){
onLocationChangedListener.onLocationChanged(amapLocation);
}
ok!
5.完整代码
package com.pansoft.oilgas.gaodenavigation;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;
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.LocationSource;
import com.amap.api.maps.MapView;
import java.text.SimpleDateFormat;
import java.util.Date;
public class QueryCurrentLocationActivity extends AppCompatActivity implements AMapLocationListener,LocationSource {
private AMapLocationClientOption mLocationOption = null;
private AMapLocationClient mLocationClient = null;
private final int REQ_LOCATION=0x12;
private MapView mapView;
private AMap aMap;
private OnLocationChangedListener onLocationChangedListener;
@Override
public void activate(OnLocationChangedListener onLocationChangedListener) {
this.onLocationChangedListener=onLocationChangedListener;
}
@Override
public void deactivate() {
if(mLocationClient!=null){
mLocationClient.stopLocation();
mLocationClient.onDestroy();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mapView=new MapView(this);
setContentView(mapView);
aMap=mapView.getMap();
mapView.onCreate(savedInstanceState);
mLocationClient = new AMapLocationClient(this);
//初始化定位参数
mLocationOption = new AMapLocationClientOption();
//设置定位监听
mLocationClient.setLocationListener(this);
//设置定位模式为高精度模式,Battery_Saving为低功耗模式,Device_Sensors是仅设备模式
mLocationOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);
//设置定位间隔,单位毫秒,默认为2000ms
mLocationOption.setInterval(2000);
//设置定位参数
mLocationClient.setLocationOption(mLocationOption);
/* 此方法为每隔固定时间会发起一次定位请求,为了减少电量消耗或网络流量消耗, 注意设置合适的定位时间的间隔(最小间隔支持为2000ms),并且在合适时间调用stopLocation()方法来取消定位请求 在定位结束后,在合适的生命周期调用onDestroy()方法 在单次定位情况下,定位无论成功与否,都无需调用stopLocation()方法移除请求,定位sdk内部会移除 启动定位*/
requestLocationPermission();
}
public void requestLocationPermission(){
ActivityCompat.requestPermissions(this,new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},REQ_LOCATION);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if(requestCode==REQ_LOCATION){
if(grantResults!=null&&grantResults.length>0){
if(grantResults[0]== PackageManager.PERMISSION_GRANTED){
mLocationClient.startLocation();
}else{
Toast.makeText(QueryCurrentLocationActivity.this,"缺少定位权限,无法完成定位~",Toast.LENGTH_LONG).show();
}
}
}
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
@Override
public void onLocationChanged(AMapLocation amapLocation) {
if (amapLocation != null) {
if (amapLocation.getErrorCode() == 0) {
if(onLocationChangedListener!=null){
onLocationChangedListener.onLocationChanged(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());
}
}
}
@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
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
if(mLocationClient!=null){
mLocationClient.stopLocation();
mLocationClient.onDestroy();
}
}
}
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