高德地图八：手机定位和GPS定位
高德地图八：手机定位和GPS定位
代码实现：
layout/activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="match_parent"><LinearLayoutandroid:orientation="horizontal"android:layout_width="match_parent"android:layout_height="wrap_content"android:gravity="center_horizontal"><TextViewandroid:text="经度："android:layout_width="wrap_content"android:layout_height="wrap_content"/><!-- 定义输入经度值的文本框 --><EditTextandroid:id="@+id/lng"android:text="113.395563"android:inputType="numberDecimal"android:layout_width="100dp"android:layout_height="wrap_content" /><TextViewandroid:text="纬度："android:layout_width="wrap_content"android:layout_height="wrap_content"android:paddingLeft="8dp" /><!-- 定义输入纬度值的文本框 --><EditTextandroid:id="@+id/lat"android:text="23.126222"android:inputType="numberDecimal"android:layout_width="100dp"android:layout_height="wrap_content" /><Buttonandroid:id="@+id/loc"android:text="定位"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_weight="4" /></LinearLayout><LinearLayoutandroid:orientation="horizontal"android:layout_width="match_parent"android:layout_height="wrap_content"android:gravity="center_horizontal"><!-- 定义选择定位方式的单选按钮组 --><RadioGroupandroid:id="@+id/rg"android:orientation="horizontal"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_weight="1"><RadioButtonandroid:text="手机定位"android:id="@+id/manual"android:checked="true"android:layout_width="wrap_content"android:layout_height="wrap_content"/><RadioButtonandroid:text="GPS定位"android:id="@+id/gps"android:layout_width="wrap_content"android:layout_height="wrap_content"/></RadioGroup></LinearLayout><!-- 使用高德地图的提供的MapView --><com.amap.api.maps.MapViewandroid:id="@+id/map"android:layout_width="match_parent"android:layout_height="match_parent" />
</LinearLayout>
com/example/administrator/MainActivity.java
package com.example.administrator;import android.app.Activity;
import android.content.Context;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.view.View;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.TextView;
import android.widget.Toast;import com.amap.api.maps.AMap;
import com.amap.api.maps.CameraUpdate;
import com.amap.api.maps.CameraUpdateFactory;
import com.amap.api.maps.MapView;
import com.amap.api.maps.model.BitmapDescriptor;
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 java.util.ArrayList;public class MainActivity extends Activity {private MapView mapView;private AMap aMap;private LocationManager locationManager;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);mapView = (MapView) findViewById(R.id.map);// 必须回调MapView的onCreate()方法mapView.onCreate(savedInstanceState);init();RadioButton rb = (RadioButton) findViewById(R.id.gps);// 为GPS单选按钮设置监听器rb.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// 如果该单选框已经被勾选if (isChecked) {// 通过监听器监听GPS提供的定位信息的改变if (ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {// TODO: Consider calling// ActivityCompat#requestPermissions// here to request the missing permissions, and then overriding// public void onRequestPermissionsResult(int requestCode, String[] permissions,// int[] grantResults)// to handle the case where the user grants the permission. See the documentation// for ActivityCompat#requestPermissions for more details.return;}locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 300, 8, new LocationListener() {@Overridepublic void onLocationChanged(Location loc) {// 使用GPS提供的定位信息来更新位置updatePosition(loc);}@Overridepublic void onStatusChanged(String provider, int status, Bundle extras) {}@Overridepublic void onProviderEnabled(String provider) {// 使用GPS提供的定位信息来更新位置if (ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {// TODO: Consider calling// ActivityCompat#requestPermissions// here to request the missing permissions, and then overriding// public void onRequestPermissionsResult(int requestCode, String[] permissions,// int[] grantResults)// to handle the case where the user grants the permission. See the documentation// for ActivityCompat#requestPermissions for more details.return;}updatePosition(locationManager.getLastKnownLocation(provider));}@Overridepublic void onProviderDisabled(String provider) {}});}}});Button bn = (Button) findViewById(R.id.loc);final TextView latTv = (TextView) findViewById(R.id.lat);final TextView lngTv = (TextView) findViewById(R.id.lng);bn.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// 获取用户输入的经度、纬度值String lng = lngTv.getEditableText().toString().trim();String lat = latTv.getEditableText().toString().trim();if (lng.equals("") || lat.equals("")) {Toast.makeText(MainActivity.this, "请输入有效的经度、纬度!", Toast.LENGTH_SHORT).show();} else {// 设置根据用户输入的地址定位((RadioButton) findViewById(R.id.manual)).setChecked(true);double dLng = Double.parseDouble(lng);double dLat = Double.parseDouble(lat);// 将用户输入的经、纬度封装成LatLngLatLng pos = new LatLng(dLat, dLng); // ①// 创建一个设置经纬度的CameraUpdateCameraUpdate cu = CameraUpdateFactory.changeLatLng(pos); // ②// 更新地图的显示区域aMap.moveCamera(cu); // ③// 创建MarkerOptions对象MarkerOptions markerOptions = new MarkerOptions();// 设置MarkerOptions的添加位置markerOptions.position(pos);// 设置MarkerOptions的标题markerOptions.title("疯狂软件教育中心");// 设置MarkerOptions的摘录信息markerOptions.snippet("专业的Java、iOS培训中心");// 设置MarkerOptions的图标markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));markerOptions.draggable(true);// 添加MarkerOptions（实际上就是添加Marker）Marker marker = aMap.addMarker(markerOptions);marker.showInfoWindow(); // 设置默认显示信息窗// 创建MarkerOptions、并设置它的各种属性MarkerOptions markerOptions1 = new MarkerOptions();markerOptions1.position(new LatLng(dLat + 0.001, dLng))// 设置标题.title("疯狂软件教育中心学生食堂").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)).draggable(true);// 使用集合封装多个图标，这样可为MarkerOptions设置多个图标ArrayList<BitmapDescriptor> giflist = new ArrayList<>();giflist.add(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE));giflist.add(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));giflist.add(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW));// 在创建一个MarkerOptions、并设置它的各种属性MarkerOptions markerOptions2 = new MarkerOptions().position(new LatLng(dLat - 0.001, dLng))// 为MarkerOptions设置多个图标.icons(giflist).title("疯狂软件教育中心学生宿舍").draggable(true)// 设置图标的切换频率.period(10);// 使用ArrayList封装多个MarkerOptions，即可一次添加多个MarkerArrayList<MarkerOptions> optionList = new ArrayList<>();optionList.add(markerOptions1);optionList.add(markerOptions2);// 批量添加多个MarkeraMap.addMarkers(optionList, true);}}});}private void updatePosition(Location location) {LatLng pos = new LatLng(location.getLatitude(), location.getLongitude());// 创建一个设置经纬度的CameraUpdateCameraUpdate cu = CameraUpdateFactory.changeLatLng(pos);// 更新地图的显示区域aMap.moveCamera(cu);// 清除所有Marker等覆盖物aMap.clear();// 创建一个MarkerOptions对象MarkerOptions markerOptions = new MarkerOptions();markerOptions.position(pos);// 设置MarkerOptions使用自定义图标markerOptions.icon(BitmapDescriptorFactory.fromResource(R.drawable.car));markerOptions.draggable(true);// 添加MarkerOptions（实际上是添加Marker）Marker marker = aMap.addMarker(markerOptions);}// 初始化AMap对象private void init() {if (aMap == null) {aMap = mapView.getMap();// 创建一个设置放大级别的CameraUpdateCameraUpdate cu = CameraUpdateFactory.zoomTo(15);// 设置地图的默认放大级别aMap.moveCamera(cu);// 创建一个更改地图倾斜度的CameraUpdateCameraUpdate tiltUpdate = CameraUpdateFactory.changeTilt(30);// 改变地图的倾斜度aMap.moveCamera(tiltUpdate);}}@Overrideprotected void onResume() {super.onResume();// 必须回调MapView的onResume()方法mapView.onResume();}@Overrideprotected void onPause() {super.onPause();// 必须回调MapView的onPause()方法mapView.onPause();}@Overrideprotected void onSaveInstanceState(Bundle outState) {super.onSaveInstanceState(outState);// 必须回调MapView的onSaveInstanceState()方法mapView.onSaveInstanceState(outState);}@Overrideprotected void onDestroy() {super.onDestroy();// 必须回调MapView的onDestroy()方法mapView.onDestroy();}
}
