实现后台持续定位网上资料很多，大部分都是关于服务保活的！但有时不一定是服务挂了，而是GPS模块休眠了；下面是我的定位服务类
acquireWakeLock() 方法是设置CPU不休眠防止GPS休眠了
startForeground(notification_id, buildNotification()) 设置为前台服务在8.0下不被杀死
setAppBackgroundPlayer() 后台播放无声音乐保活服务
此外我还加了1像素保活机制，这个代码我就不贴了，网上自己搜下!
public class LocationService extends Service implements AMapLocationListener {
// // 定位相关
// private LocationClient mLocClient;
// //
private int msgId = -1;
private PowerManager.WakeLock wakeLock = null;
//声明AMapLocationClient类对象
private AMapLocationClient mLocationClient = null;
private AMapLocationClientOption locationOption;
private final int INTERVAL_ACTION_PATROL_FREQUENCY = 1000;
private final int INTERVAL_ACTION_FAST_LOCATION = 1000*3;//如果速度过快，改为3秒定一次
private AMapLocation location = null;
private int mInterval;
//android 8.0后台定位权限
private static final String NOTIFICATION_CHANNEL_NAME = "BG_LOCTION";
private NotificationManager notificationManager = null;
boolean isCreateChannel = false;
public static long mLocationMs = 0;
public static long mUploadStampMs = 0;
private List<LatLng> latLngPool = new ArrayList<>();//存连续定位五个点
@Override
public void onCreate() {
super.onCreate();
startForeground(12123, buildNotification());
mInterval = PreferenceUtils.getInterval();
initGaoDe();
}
private void initGaoDe() {
//初始化定位
mLocationClient = new AMapLocationClient(getApplicationContext());
//设置定位回调监听
mLocationClient.setLocationListener(this);
locationOption = new AMapLocationClientOption();
/**
* 设置定位场景，目前支持三种场景（签到、出行、运动，默认无场景）
*/
// locationOption.setLocationPurpose(AMapLocationClientOption.AMapLocationPurpose.Sport);
//设置定位模式为AMapLocationMode.Device_Sensors，仅设备模式。
locationOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);
locationOption.setOnceLocation(false);
//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。
// option.setOnceLocationLatest(true);
//设置定位间隔,单位毫秒,默认为2000ms，最低1000ms。
locationOption.setInterval(1000*mInterval);
//设置是否返回地址信息（默认返回地址信息）
locationOption.setNeedAddress(true);
//设置是否允许模拟位置,默认为true，允许模拟位置
locationOption.setMockEnable(true);
locationOption.setGpsFirst(true);
//单位是毫秒，默认30000毫秒，建议超时时间不要低于8000毫秒。
locationOption.setHttpTimeOut(50000);
//关闭缓存机制
locationOption.setLocationCacheEnable(false);
if (null != mLocationClient && mInterval != 0) {
mLocationClient.setLocationOption(locationOption);
//设置场景模式后最好调用一次stop，再调用start以保证场景模式生效
mLocationClient.stopLocation();
mLocationClient.startLocation();
}
}
//
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (intent != null) {
msgId = intent.getIntExtra("msgId", -1);
}
flags = START_STICKY;
setAppBackgroundPlayer();
acquireWakeLock();
// 刷新定位
if (mLocationClient != null && mLocationClient.isStarted()) {
mLocationClient.startLocation();
}
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onLocationChanged(AMapLocation loc) {
if (null != loc) {
if (loc.getErrorCode() == 0) {
/**
*
*做点位上传或者保存操作
*/
}
}
}
/**
* 获取时间
*
* @return
*/
public String getTime() {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss ");
Date curDate = new Date(System.currentTimeMillis());//获取当前时间
String str = formatter.format(curDate);
return str;
}
@Override
public void onDestroy() {
super.onDestroy();
releaseWakeLock();
if (mLocationClient != null) {
mLocationClient.unRegisterLocationListener(this);
mLocationClient.stopLocation();//停止定位后，本地定位服务并不会被销毁
mLocationClient.onDestroy();//销毁定位客户端，同时销毁本地定位服务。
}
pausePlayer();
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
/**
* PARTIAL_WAKE_LOCK:保持CPU 运转，屏幕和键盘灯有可能是关闭的。
* SCREEN_DIM_WAKE_LOCK：保持CPU 运转，允许保持屏幕显示但有可能是灰的，允许关闭键盘灯
* SCREEN_BRIGHT_WAKE_LOCK：保持CPU 运转，允许保持屏幕高亮显示，允许关闭键盘灯
* FULL_WAKE_LOCK：保持CPU 运转，保持屏幕高亮显示，键盘灯也保持亮度
* ACQUIRE_CAUSES_WAKEUP：强制使屏幕亮起，这种锁主要针对一些必须通知用户的操作.
* ON_AFTER_RELEASE：当锁被释放时，保持屏幕亮起一段时间
*/
private void acquireWakeLock() {
if (null == wakeLock) {
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK
| PowerManager.ON_AFTER_RELEASE, getClass()
.getCanonicalName());
if (null != wakeLock) {
// Log.i(TAG, "call acquireWakeLock");
Log.d("33333", "call acquireWakeLock");
wakeLock.acquire();
}
}
}
private Notification buildNotification() {
Notification.Builder builder = null;
Notification notification = null;
if (android.os.Build.VERSION.SDK_INT >= 26) {
//Android O上对Notification进行了修改，如果设置的targetSDKVersion>=26建议使用此种方式创建通知栏
if (null == notificationManager) {
notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
}
String channelId = getPackageName();
if (!isCreateChannel) {
NotificationChannel notificationChannel = new NotificationChannel(channelId,
NOTIFICATION_CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);
notificationChannel.enableLights(false);//是否在桌面icon右上角展示小圆点
notificationChannel.setLightColor(Color.BLUE); //小圆点颜色
notificationChannel.setShowBadge(true); //是否在久按桌面图标时显示此渠道的通知
notificationManager.createNotificationChannel(notificationChannel);
isCreateChannel = true;
}
builder = new Notification.Builder(getApplicationContext(), channelId);
} else {
builder = new Notification.Builder(getApplicationContext());
}
builder.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("后台定位服务")
.setContentText("")
.setWhen(System.currentTimeMillis());
if (android.os.Build.VERSION.SDK_INT >= 16) {
notification = builder.build();
} else {
return builder.getNotification();
}
return notification;
}
// 释放设备电源锁
private void releaseWakeLock() {
if (null != wakeLock && wakeLock.isHeld()) {
Log.d("33333", "call releaseWakeLock");
// Log.i(TAG, "call releaseWakeLock");
wakeLock.release();
wakeLock = null;
}
}
/**
* 设置应用进入后台，播放音频来进行cpu不休眠，进行应用保活
*/
private void setAppBackgroundPlayer() {
MediaPlayerUtils.getInstance().playerMusic("no_notice.mp3", true);
}
private void pausePlayer() {
MediaPlayerUtils.getInstance().destoryPlayer();
}
}
