如何解决 GPS 在后台 android Pie 中自动关闭?
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【中文标题】如何解决 GPS 在后台 android Pie 中自动关闭?【英文标题】:How to resolve GPS turns off automatically in background android Pie? 【发布时间】:2019-10-18 04:33:17 【问题描述】:我正在尝试在 android 中使用 GPS 获取坐标。我成功地获得了前台位置,但是每当我将应用程序置于后台时,GPS 标志就会消失,并且在后台停止定位点。 我使用了不同版本的 android,一些定位点(低于 8.0)和一些不是(Pie)。
如何在 Pie 中继续在后台运行 GPS。我尝试了不同的 SO 答案,但没有得到解决方案。
我正在使用 Service 在后台运行应用程序并使用广播接收器获取坐标。但我在 Pie 版本中没有得分。
这是我的 MainActivity.java
public class MainActivity extends AppCompatActivity
private LocationManager locationManager;
private LocationListener locationListener;
private double latitude, longitude;
BroadcastReceiver broadcastReceiver;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
/*inflating layout*/
riderFirstName = findViewById(R.id.rider_fName);
riderLastName = findViewById(R.id.rider_lName);
riderNote = findViewById(R.id.note);
logout = findViewById(R.id.logout);
if (!runtime_permissions())
Intent i = new Intent(getApplicationContext(), GPS_Service.class);
startService(i);
@Override
protected void onResume()
super.onResume();
if (broadcastReceiver==null)
broadcastReceiver=new BroadcastReceiver()
@Override
public void onReceive(Context context, Intent intent)
double lat = (double) intent.getExtras().get("latitude");
double lng= (double) intent.getExtras().get("longitude");
Log.i("lat", String.valueOf(lat));
Log.i("lang", String.valueOf(lng));
Log.i("lang", String.valueOf(RiderID));
;
registerReceiver(broadcastReceiver, new IntentFilter("location_update"));
@Override
protected void onDestroy()
super.onDestroy();
if (broadcastReceiver!=null)
unregisterReceiver(broadcastReceiver);
private boolean runtime_permissions()
if (Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
requestPermissions(new String[]Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, 100);
return true;
return false;
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == 100)
if (grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED)
Intent i = new Intent(getApplicationContext(), GPS_Service.class);
startService(i);
else
runtime_permissions();
这是我的服务类
public class GPS_Service extends Service
PowerManager.WakeLock wakeLock;
private LocationListener listener;
private LocationManager locationManager;
@Nullable
@Override
public IBinder onBind(Intent intent)
return null;
@SuppressLint("InvalidWakeLockTag")
@Override
public void onCreate()
listener = new LocationListener()
@Override
public void onLocationChanged(Location location)
Intent i = new Intent("location_update");
i.putExtra("latitude", location.getLatitude());
i.putExtra("longitude", location.getLongitude());
sendBroadcast(i);
@Override
public void onStatusChanged(String s, int i, Bundle bundle)
@Override
public void onProviderEnabled(String s)
@Override
public void onProviderDisabled(String s)
Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);
;
locationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
//noinspection MissingPermission
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
return;
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, CommonObjects.DELAY_LOCATION, 0, listener);
@Override
public void onDestroy()
super.onDestroy();
if(locationManager != null)
//noinspection MissingPermission
locationManager.removeUpdates(listener);
这是清单
<!-- my permissions -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
【问题讨论】:
从 Andriod 8 及更高版本开始,来自后台服务的位置更新在一小时内仅收到几次。尝试使用前台服务。 @ShubhamPanchal - 您能否参考或回答前台服务代码?这将是巨大的帮助。我正在尝试但每次都失败了 你可以得到代码here和here。可以参考官方文档here. 【参考方案1】:通过使用startForegroundService()
而不是startService()
,我得到了我的问题的解决方案(在后台获取 GPS 位置),适用于 Oreo (8.0) 及更高版本。
为了实现,我们必须在 Manifest 中添加一个 Foreground 权限,并在 Service 类中添加一个startForeground();
方法,如下所示:
这是我更新后的 MianActivity.java 代码
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
...
if (!runtime_permissions())
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
Intent serviceIntent = new Intent(context, YourService.class);
ContextCompat.startForegroundService(context, serviceIntent );
else
context.startService(new Intent(context, YourService.class));
更新了我的服务类
@SuppressLint("InvalidWakeLockTag")
@Override
public void onCreate()
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
startMyOwnForeground();
else
startForeground(1, new Notification());
...
private void startMyOwnForeground()
String NOTIFICATION_CHANNEL_ID = "com.example.simpleapp";
String channelName = "My Background Service";
NotificationChannel chan = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, NotificationManager.IMPORTANCE_NONE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
chan.setLightColor(Color.BLUE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
assert manager != null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
manager.createNotificationChannel(chan);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
Notification notification = notificationBuilder.setOngoing(true)
.setContentTitle("App is running in background")
.setPriority(NotificationManager.IMPORTANCE_MIN)
.setCategory(Notification.CATEGORY_SERVICE)
.build();
startForeground(2, notification);
更新清单权限
...
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
【讨论】:
我遇到了同样的问题,最近有没有人试过这个来验证它在 2021 年仍然有效? @programmer3 - 这个问题仍然存在。哈哈。实际上,这取决于制造商。大多数厂商不允许任何后台进程因电池消耗而长时间运行,直到应用从省电模式/自动启动中移除。 添加前台服务不足以解决此问题。此外,如果您希望后台服务保持 24/7 全天候运行,您必须通过意图在设置中移动最终用户,以便他可以从 省电模式/自动启动 中删除应用程序。以上是关于如何解决 GPS 在后台 android Pie 中自动关闭?的主要内容,如果未能解决你的问题,请参考以下文章
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