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src/MainActivity.java
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package com.example.sixaunyi;
import static androidx.constraintlayout.motion.utils.Oscillator.TAG;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.Manifest;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.nfc.Tag;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
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.AMapUtils;
import com.amap.api.maps.LocationSource;
import com.amap.api.maps.MapView;
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;
import com.amap.api.services.core.AMapException;
import com.amap.api.services.core.LatLonPoint;
import com.amap.api.services.core.PoiItem;
import com.amap.api.services.geocoder.GeocodeResult;
import com.amap.api.services.geocoder.GeocodeSearch;
import com.amap.api.services.geocoder.RegeocodeAddress;
import com.amap.api.services.geocoder.RegeocodeQuery;
import com.amap.api.services.geocoder.RegeocodeResult;
import com.amap.api.services.poisearch.PoiResult;
import com.amap.api.services.poisearch.PoiSearch;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import java.util.ArrayList;
import java.util.List;
import pub.devrel.easypermissions.AfterPermissionGranted;
import pub.devrel.easypermissions.EasyPermissions;
public class MainActivity extends AppCompatActivity implements AMapLocationListener, LocationSource,
AMap.OnMapLongClickListener, GeocodeSearch.OnGeocodeSearchListener, AMap.OnMarkerDragListener,
AMap.OnMarkerClickListener{
//请求权限码
private static final int REQUEST_PERMISSIONS = 9527;
//声明AMapLocationClient类对象
public AMapLocationClient mLocationClient = null;
//声明AMapLocationClientOption对象
public AMapLocationClientOption mLocationOption = null;
private MapView mapView = null;
private String city;
private LatLng Current_latlng;
//地图控制器*********非常重要！！！！！！
private AMap aMap = null;
//位置更改监听
private LocationSource.OnLocationChangedListener mListener;
//地理编码搜索
private GeocodeSearch geocodeSearch;
//解析成功标识码
private static final int PARSE_SUCCESS_CODE = 1000;
//POI查询对象
private PoiSearch.Query query;
//POI搜索对象
private PoiSearch poiSearch;
//城市码
private String cityCode = null;
//浮动按钮
private FloatingActionButton fabPOI;
//浮动按钮 清空地图标点
private FloatingActionButton ClearMarker_btn;
//浮动按钮 更换活动
private FloatingActionButton ChangeAct_btn;
//标点列表
private List<Marker> markerList = new ArrayList<>();
//标识参数类
private MarkerOptions markerOption = new MarkerOptions();
@SuppressLint("MissingInflatedId")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fabPOI = findViewById(R.id.fab_poi);
ClearMarker_btn = findViewById(R.id.clearMarker_btn);
ChangeAct_btn = findViewById(R.id.change_btn);
ChangeAct_btn.show();
//tvContent = findViewById(R.id.tv_content);
/*初始化定位,需要在检查版本之前
*因为配置好之后才能启动定位，否则会报错
*/
initLocation();
//初始化地图
initMap(savedInstanceState);
//检查安卓版本
checkingAndroidVersion();
}
/**
* 检查Android版本
*/
private void checkingAndroidVersion() {
//Android6.0及以上先获取权限再定位
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
requestPermission();
}
//Android6.0以下直接定位
else {
//直接定位
mLocationClient.startLocation();
}
}
/**
* 动态请求权限
*/
@AfterPermissionGranted(REQUEST_PERMISSIONS)
private void requestPermission() {
String[] permissions = {
Manifest.permission.ACCESS_COARSE_LOCATION,
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.READ_PHONE_STATE,
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
if (EasyPermissions.hasPermissions(this, permissions)) {
//有权限
//******
Log.d(TAG, "已获得权限，可以定位啦！");
showMsg("已获得权限，可以定位啦！");
//开始定位
mLocationClient.startLocation();
} else {
//false 无权限
EasyPermissions.requestPermissions(this, "需要权限", REQUEST_PERMISSIONS, permissions);
}
}
//提示框显示文本
private void showMsg(String msg) {
Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
}
/**
* 请求权限结果
* @param requestCode
* @param permissions
* @param grantResults
*/
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
//设置请求到的权限结果
EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
}
/******** 初始化定位 *******/
private void initLocation() {
//初始化定位
try {
mLocationClient = new AMapLocationClient(getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
if (mLocationClient != null) {
//设置定位回调监听
mLocationClient.setLocationListener(this);
//初始化AMapLocationClientOption对象
mLocationOption = new AMapLocationClientOption();
//设置定位模式为AMapLocationMode.Hight_Accuracy，高精度模式。
mLocationOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);
//获取最近3s内精度最高的一次定位结果：
//设置setOnceLocationLatest(boolean b)接口为true，启动定位时SDK会返回最近3s内精度最高的一次定位结果。如果设置其为true，setOnceLocation(boolean b)接口也会被设置为true，反之不会，默认为false。
mLocationOption.setOnceLocationLatest(true);
//设置是否返回地址信息（默认返回地址信息）
mLocationOption.setNeedAddress(true);
//设置定位请求超时时间，单位是毫秒，默认30000毫秒，建议超时时间不要低于8000毫秒。
mLocationOption.setHttpTimeOut(20000);
//关闭缓存机制，高精度定位会产生缓存。
mLocationOption.setLocationCacheEnable(false);
//给定位客户端对象设置定位参数
mLocationClient.setLocationOption(mLocationOption);
}
}
/**
* 初始化地图
* @param savedInstanceState
*/
private void initMap(Bundle savedInstanceState) {
//因为mapView为null，所以要加上这个括号，不可常规的mapView.findViewById
mapView = (MapView) findViewById(R.id.map_view);
//在activity执行onCreate时执行mMapView.onCreate(savedInstanceState)，创建地图
mapView.onCreate(savedInstanceState);
//初始化地图控制器对象
aMap = mapView.getMap();
// 设置定位监听
aMap.setLocationSource(this);
// 设置为true表示显示定位层并可触发定位，false表示隐藏定位层并不可触发定位，默认是false
aMap.setMyLocationEnabled(true);
//设置地图标志点击事件
aMap.setOnMarkerClickListener(this);
//设置地图标志拖拽事件
aMap.setOnMarkerDragListener(this);
//开启室内地图
//aMap.showIndoorMap(true);
//设置地图长按事件
aMap.setOnMapLongClickListener(this);
//构造 GeocodeSearch 对象
try {
geocodeSearch = new GeocodeSearch(this);
} catch (AMapException e) {
e.printStackTrace();
}
//设置监听
geocodeSearch.setOnGeocodeSearchListener(this);
}
/**
* 激活定位
*/
@Override
public void activate(OnLocationChangedListener onLocationChangedListener) {
mListener = onLocationChangedListener;
if (mLocationClient == null) {
mLocationClient.startLocation();//启动定位
}
}
/**
* 停止定位
*/
@Override
public void deactivate() {
mListener = null;
if (mLocationClient != null) {
mLocationClient.stopLocation();
mLocationClient.onDestroy();
}
mLocationClient = null;
}
@Override
public void onLocationChanged(AMapLocation aMapLocation) {
if (aMapLocation != null) {
//定位成功
if (aMapLocation.getErrorCode() == 0) {
//地址
String address = aMapLocation.getAddress();
//城市赋值
city = aMapLocation.getCity();
//当前位置经纬度坐标
Current_latlng = new LatLng(aMapLocation.getLatitude(), aMapLocation.getLongitude());
//获取纬度
double latitude = aMapLocation.getLatitude();
//获取经度
double longitude = aMapLocation.getLongitude();
Log.d("MainActivity", aMapLocation.getCity());
showMsg(address);
//停止定位后，本地定位服务并不会被销毁
mLocationClient.stopLocation();
if (mListener != null) {
// 显示系统图标
mListener.onLocationChanged(aMapLocation);
}
//显示浮动按钮
fabPOI.show();
//赋值
cityCode = aMapLocation.getCityCode();
}
else {
//定位失败时，可通过ErrCode（错误码）信息来确定失败的原因，errInfo是错误信息，详见错误码表。
Log.e("AmapError", "location Error, ErrCode:"
+ aMapLocation.getErrorCode() + ", errInfo:"
+ aMapLocation.getErrorInfo());
}
}
}
/***********************Activity相关函数，其中添加了保证mapView与activity同步相关函数******************/
@Override
protected void onResume() {
super.onResume();
//在activity执行onResume时执行mMapView.onResume ()，重新绘制加载地图
mapView.onResume();
}
@Override
protected void onPause() {
super.onPause();
//在activity执行onPause时执行mMapView.onPause ()，暂停地图的绘制
mapView.onPause();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
//在activity执行onSaveInstanceState时执行mMapView.onSaveInstanceState (outState)，保存地图当前的状态
mapView.onSaveInstanceState(outState);
}
@Override
protected void onDestroy() {
super.onDestroy();
//销毁定位客户端，同时销毁本地定位服务。
if (mLocationClient != null) {
mLocationClient.onDestroy();
}
//在activity执行onDestroy时执行mMapView.onDestroy()，销毁地图
mapView.onDestroy();
}
/******************************************************************/
/* * * 长按地图响应函数 * * */
//LatLng 为高德地图包自带的存储坐标对象
@Override
public void onMapLongClick(LatLng latLng) {
float distance = AMapUtils.calculateLineDistance(Current_latlng,latLng);
//showMsg("长按了地图，经度："+latLng.longitude+"，纬度："+latLng.latitude);
showMsg("直线距离："+distance+"米");
//坐标转地址
latlonToAddress(latLng);
//添加标点
addMarker(latLng);
}
/**
* 添加地图标点
* @param latLng
*/
private void addMarker(LatLng latLng) {
//显示浮动按钮
ClearMarker_btn.show();
//添加标点
Marker marker = aMap.addMarker(markerOption
.position(latLng)
.draggable(true)
//标点图标
.icon(BitmapDescriptorFactory.
fromBitmap(BitmapFactory.decodeResource(getResources(),R.drawable.img)))
//备注
.title("路径点")
.snippet("距离：")
);
marker.showInfoWindow();
markerList.add(marker);
}
/**
* 清空地图Marker
* @param view
*/
public void clearAllMarker(View view) {
if (markerList != null && markerList.size()>0){
for (Marker markerItem : markerList) {
markerItem.remove();
}
}
ClearMarker_btn.hide();
}
public void changeAct(View view) {
Intent intent = new Intent(MainActivity.this, VideoActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
startActivity(intent);
}
/**
* Marker点击事件
*
* @param marker
* @return
*/
@Override
public boolean onMarkerClick(Marker marker) {
Log.d(TAG,"点击了标点");
//显示InfoWindow
/*
if (!marker.isInfoWindowShown()) {
//显示
marker.showInfoWindow();
} else {
//隐藏
marker.hideInfoWindow();
}
*/
return true;
}
/**
* 开始拖动
* @param marker
*/
@Override
public void onMarkerDragStart(Marker marker) {
Log.d(TAG,"开始拖动");
}
/**
* 拖动中
* @param marker
*/
@Override
public void onMarkerDrag(Marker marker) {
Log.d(TAG,"拖动中");
}
/**
* 拖动完成
* @param marker
*/
@Override
public void onMarkerDragEnd(Marker marker) {
Log.d(TAG,"拖动完成");
}
/* * * 通过坐标获取地址 * * *
*
* @param latLng
*/
private void latlonToAddress(LatLng latLng) {
//位置点 通过经纬度进行构建
LatLonPoint latLonPoint = new LatLonPoint(latLng.latitude, latLng.longitude);
//逆编码查询 第一个参数表示一个Latlng，第二参数表示范围多少米，第三个参数表示是火系坐标系还是GPS原生坐标系
RegeocodeQuery query = new RegeocodeQuery(latLonPoint, 20, GeocodeSearch.AMAP);
//异步获取地址信息
geocodeSearch.getFromLocationAsyn(query);
}
/*****************************坐标转地址****************************
* @param regeocodeResult
* @param rCode
*/
@Override
public void onRegeocodeSearched(RegeocodeResult regeocodeResult, int rCode) {
if(rCode == PARSE_SUCCESS_CODE){
RegeocodeAddress regeocodeAddress = regeocodeResult.getRegeocodeAddress();
//显示解析后的地址
showMsg("地址："+regeocodeAddress.getFormatAddress());
}else {
showMsg("获取地址失败");
}
}
@Override
public void onGeocodeSearched(GeocodeResult geocodeResult, int i) {
}
/*
@Override
public void onPoiSearched(PoiResult poiResult, int i) {
//解析result获取POI信息
//获取POI组数列表
ArrayList<PoiItem> poiItems = poiResult.getPois();
for (PoiItem poiItem : poiItems) {
Log.d("MainActivity", " Title：" + poiItem.getTitle() + " Snippet：" + poiItem.getSnippet());
}
}*/
/*
@Override
public void (PoiItem poiItem, int i) {
}*/
}
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