适配8.0限制后台定位

package com.qu.weibao.demo;import android.app.Activity;
import android.app.Notification;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import com.baidu.location.BDAbstractLocationListener;
import com.baidu.location.BDLocation;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.DotOptions;
import com.baidu.mapapi.map.MapStatus;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.map.MyLocationData;
import com.baidu.mapapi.map.OverlayOptions;
import com.baidu.mapapi.model.LatLng;
import com.qu.waibao.R;/*** 适配Android 8.0限制后台定位的功能，新增允许后台定位的接口，即开启一个前台定位服务*/
public class ForegroundActivity extends Activity {private LocationClient mClient;private MyLocationListener myLocationListener = new MyLocationListener();private MapView mMapView;private BaiduMap mBaiduMap;private Button mForegroundBtn;private NotificationUtils mNotificationUtils;private Notification notification;private boolean isFirstLoc = true;private boolean isEnableLocInForeground = false;@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.foreground);initViews();// 定位初始化mClient = new LocationClient(this);LocationClientOption mOption = new LocationClientOption();mOption.setScanSpan(5000);mOption.setCoorType("bd09ll");mOption.setIsNeedAddress(true);mOption.setOpenGps(true);mClient.setLocOption(mOption);mClient.registerLocationListener(myLocationListener);mClient.start();//设置后台定位//android8.0及以上使用NotificationUtilsif (Build.VERSION.SDK_INT >= 26) {mNotificationUtils = new NotificationUtils(this);Notification.Builder builder2 = mNotificationUtils.getAndroidChannelNotification("适配android 8限制后台定位功能", "正在后台定位");notification = builder2.build();} else {//获取一个Notification构造器Notification.Builder builder = new Notification.Builder(ForegroundActivity.this);Intent nfIntent = new Intent(ForegroundActivity.this, ForegroundActivity.class);builder.setContentIntent(PendingIntent.getActivity(ForegroundActivity.this, 0, nfIntent, 0)) // 设置PendingIntent.setContentTitle("适配android 8限制后台定位功能") // 设置下拉列表里的标题.setSmallIcon(R.drawable.ic_launcher) // 设置状态栏内的小图标.setContentText("正在后台定位") // 设置上下文内容.setWhen(System.currentTimeMillis()); // 设置该通知发生的时间notification = builder.build(); // 获取构建好的Notification}notification.defaults = Notification.DEFAULT_SOUND; //设置为默认的声音}//移除监听@Overrideprotected void onDestroy() {super.onDestroy();mMapView.onDestroy();mMapView = null;mClient.disableLocInForeground(true);mClient.unRegisterLocationListener(myLocationListener);mClient.stop();}//初始化地图private void initViews(){mForegroundBtn = (Button) findViewById(R.id.bt_foreground);mForegroundBtn.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if(isEnableLocInForeground){//关闭后台定位（true：通知栏消失；false：通知栏可手动划除）mClient.disableLocInForeground(true);isEnableLocInForeground = false;mForegroundBtn.setText(R.string.startforeground);} else {//开启后台定位mClient.enableLocInForeground(1, notification);isEnableLocInForeground = true;mForegroundBtn.setText(R.string.stopforeground);}}});mMapView = (MapView) findViewById(R.id.mv_foreground);mBaiduMap = mMapView.getMap();mBaiduMap.setMyLocationEnabled(true);}//定位的回调class  MyLocationListener extends BDAbstractLocationListener {@Overridepublic void onReceiveLocation(BDLocation bdLocation) {if (bdLocation == null || mMapView == null) {return;}MyLocationData locData = new MyLocationData.Builder().accuracy(bdLocation.getRadius())// 此处设置开发者获取到的方向信息，顺时针0-360.direction(bdLocation.getDirection()).latitude(bdLocation.getLatitude()).longitude(bdLocation.getLongitude()).build();// 设置定位数据mBaiduMap.setMyLocationData(locData);//对地图重新处理if (isFirstLoc) {isFirstLoc = false;LatLng ll = new LatLng(bdLocation.getLatitude(),bdLocation.getLongitude());MapStatus.Builder builder = new MapStatus.Builder();builder.target(ll).zoom(15.0f);mBaiduMap.animateMapStatus(MapStatusUpdateFactory.newMapStatus(builder.build()));}//添加定位的覆盖物LatLng point = new LatLng(bdLocation.getLatitude(), bdLocation.getLongitude());OverlayOptions dotOption = new DotOptions().center(point).color(0xAAFF0000);mBaiduMap.addOverlay(dotOption);}}}