Android 关闭应用程序时保持位置服务活动
我有一个服务，当用户更改其位置时发送通知。这项服务工作正常，但当用户关闭应用程序时，问题就出现了，因为服务也关闭了 即使应用程序关闭，我如何使服务仍然有效？ 我的服务是：Android 关闭应用程序时保持位置服务活动,android,location,android-service,Android,Location,Android Service,我有一个服务，当用户更改其位置时发送通知。这项服务工作正常，但当用户关闭应用程序时，问题就出现了，因为服务也关闭了 即使应用程序关闭，我如何使服务仍然有效？ 我的服务是： public class LocationService extends Service implements LocationListener { public final static int MINUTE = 1000 * 60; boolean isGPSEnabled = false; b
public class LocationService extends Service implements LocationListener {
public final static int MINUTE = 1000 * 60;
boolean isGPSEnabled = false;
boolean isNetworkEnabled = false;
boolean canGetLocation = false;
Location location; // location
double latitude = 0; // latitude
double longitude = 0; // longitude
String provider;
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10;
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1 * MINUTE;
// Declaring a Location Manager
protected LocationManager locationManager;
// Binder given to clients
private final IBinder mBinder = new LocalBinder();
/**
* Class used for the client Binder. Because we know this service always
* runs in the same process as its clients, we don't need to deal with IPC.
*/
public class LocalBinder extends Binder {
public LocationService getService() {
// Return this instance of LocalService so clients can call public
// methods
return LocationService.this;
}
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
public Location getLocation() {
try {
locationManager = (LocationManager) getBaseContext().getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled. DEFAULT COORDINATES
} else {
this.canGetLocation = true;
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES,
this);
Log.d("Network", "Network Enabled");
if (locationManager != null) {
location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES,
this);
Log.d("GPS", "GPS Enabled");
if (locationManager != null) {
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
Log.i("LOCATION", "Latitude: " + latitude + "- Longitude: " + longitude);
return location;
}
@Override
public void onLocationChanged(Location arg0) {
NotificationManager mNotificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
Intent intent = null;
intent = new Intent(this, CompleteSurveyActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this).setSmallIcon(R.drawable.ic_launcher).setAutoCancel(true)
.setContentIntent(contentIntent).setContentTitle(this.getString(R.string.app_name)).setContentText("text");
// mBuilder.setContentIntent(contentIntent);
mNotificationManager.notify((int) System.currentTimeMillis() % Integer.MAX_VALUE, mBuilder.build());
double longitude = location.getLongitude();
double latitude = location.getLatitude();
Log.i("LOCATION", "Latitude: " + latitude + "- Longitude: " + longitude);
}
@Override
public void onProviderDisabled(String arg0) {
}
@Override
public void onProviderEnabled(String arg0) {
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
}
}
public class MyActivity extends Activity {
LocationService mService;
boolean mBound = false;
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className, IBinder service) {
// We've bound to LocalService, cast the IBinder and get
// LocalService instance
LocalBinder binder = (LocalBinder) service;
mService = binder.getService();
mBound = true;
}
@Override
public void onServiceDisconnected(ComponentName arg0) {
mBound = false;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_activity);
exampleButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
initService();
}
});
}
public void initService() {
if (mBound)
mService.getLocation();
}
@Override
protected void onStart() {
super.onStart();
// Bind to LocalService
Intent intent = new Intent(this, LocationService.class);
bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
}
@Override
protected void onStop() {
super.onStop();
// Unbind from the service
if (mBound) {
unbindService(mConnection);
mBound = false;
}
}
}
public class LocationService extends Service implements LocationListener {
public final static int MINUTE = 1000 * 60;
boolean isGPSEnabled = false;
boolean isNetworkEnabled = false;
boolean canGetLocation = false;
Location location; // location
double latitude = 0; // latitude
double longitude = 0; // longitude
String provider;
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10;
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1 * MINUTE;
// Declaring a Location Manager
protected LocationManager locationManager;
// Binder given to clients
private final IBinder mBinder = new LocalBinder();
/**
* Class used for the client Binder. Because we know this service always
* runs in the same process as its clients, we don't need to deal with IPC.
*/
public class LocalBinder extends Binder {
public LocationService getService() {
// Return this instance of LocalService so clients can call public
// methods
return LocationService.this;
}
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
public Location getLocation() {
try {
locationManager = (LocationManager) getBaseContext().getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled. DEFAULT COORDINATES
} else {
this.canGetLocation = true;
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES,
this);
Log.d("Network", "Network Enabled");
if (locationManager != null) {
location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES,
this);
Log.d("GPS", "GPS Enabled");
if (locationManager != null) {
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
Log.i("LOCATION", "Latitude: " + latitude + "- Longitude: " + longitude);
return location;
}
@Override
public void onLocationChanged(Location arg0) {
NotificationManager mNotificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
Intent intent = null;
intent = new Intent(this, CompleteSurveyActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this).setSmallIcon(R.drawable.ic_launcher).setAutoCancel(true)
.setContentIntent(contentIntent).setContentTitle(this.getString(R.string.app_name)).setContentText("text");
// mBuilder.setContentIntent(contentIntent);
mNotificationManager.notify((int) System.currentTimeMillis() % Integer.MAX_VALUE, mBuilder.build());
double longitude = location.getLongitude();
double latitude = location.getLatitude();
Log.i("LOCATION", "Latitude: " + latitude + "- Longitude: " + longitude);
}
@Override
public void onProviderDisabled(String arg0) {
}
@Override
public void onProviderEnabled(String arg0) {
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
}
}
public class MyActivity extends Activity {
LocationService mService;
boolean mBound = false;
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className, IBinder service) {
// We've bound to LocalService, cast the IBinder and get
// LocalService instance
LocalBinder binder = (LocalBinder) service;
mService = binder.getService();
mBound = true;
}
@Override
public void onServiceDisconnected(ComponentName arg0) {
mBound = false;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_activity);
exampleButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
initService();
}
});
}
public void initService() {
if (mBound)
mService.getLocation();
}
@Override
protected void onStart() {
super.onStart();
// Bind to LocalService
Intent intent = new Intent(this, LocationService.class);
bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
}
@Override
protected void onStop() {
super.onStop();
// Unbind from the service
if (mBound) {
unbindService(mConnection);
mBound = false;
}
}
}
<service android:name=".LocationService" android:enabled="true"></service>
有两种Android服务：启动和绑定。您需要使用第一个（已启动的服务）。 显示了如何使用它，下面有一个很好的生命周期图 您不需要使用
bindService（）startService（）startService（）startForegroundService（）如果你想
Android操作系统再次选择你的服务，那么就启动Sticky Service
。与@sven menschner所说的相反，我认为一个未绑定的Service
正是你所需要的，因为绑定的服务受到绑定/解除绑定机制的约束，这会杀死你的服务。这就是我要做的：
在清单文件中，定义服务：
<service
android:name=".YourService"
android:enabled="true"
android:exported="true"
android:description="@string/my_service_desc"
android:label="@string/my_infinite_service">
<intent-filter>
<action android:name="com.yourproject.name.LONGRUNSERVICE" />
</intent-filter>
</service>
最后一步是定义服务
初始化。注意onBind（）
方法。由于您不希望它被绑定，只需返回null
。应该是这样的：
public class MyService extends Service {
@Override
public IBinder onBind(Intent intent) {
// This won't be a bound service, so simply return null
return null;
}
@Override
public void onCreate() {
// This will be called when your Service is created for the first time
// Just do any operations you need in this method.
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return super.onStartCommand(intent, flags, startId);
}
}
现在，即使您关闭主活动
，您的服务也将运行。只剩下一步：要帮助您的服务
没有完成，请将其作为前台服务运行（在您的服务中这样做）。这将基本上在状态栏中创建一个通知图标。这并不意味着您的主要活动也在运行（这就是为什么您不希望绑定服务），因为活动和服务具有不同的生命周期。为了帮助该服务运行这么长时间，请尝试将堆保持在尽可能低的水平，以避免Android将其扼杀
还有一点值得称赞：您无法测试该服务是否仍在运行，从而终止DVM。如果你杀死了DVM，你将杀死所有的东西，从而也杀死了服务 哦，不！我的意思是对的，但写错了。当然，已启动（或未绑定）的服务是正确的。把第一句的顺序搞乱了。。。然而，从我的回答的其余部分可以看出我的意图；）你能给我们提供无界服务的新代码吗@sanyUse FusedLocationProviderClient and Broadcast with pending intent check示例教程