使用Google Play服务更新后台位置...
在后台每5分钟成功更新一次位置信息。
但是，也许并不奇怪，如果重启设备，则更新停止。
是否可以在手机重启后继续进行后台位置更新...如果是，怎么做？
如果有帮助，这里是现有代码：
import android.os.Bundle;
import java.util.ArrayList;
public class GPSTracker extends Service implements
GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener {
protected static final String TAG = "Location...";
private Context mContext = this;
/**
* Tracks the status of the location updates request.
*/
public static Boolean mRequestingLocationUpdates;
/**
* Time when the location was updated represented as a String.
*/
protected String mLastUpdateTime;
/**
* Provides the entry point to Google Play services.
*/
protected GoogleApiClient mGoogleApiClient;
/**
* Stores parameters for requests to the FusedLocationProviderApi.
*/
protected LocationRequest mLocationRequest;
/**
* Represents a geographical location.
*/
protected Location mCurrentLocation;
public static boolean isEnded = false;
@Override
public void onCreate() {
super.onCreate();
buildGoogleApiClient();
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d("LOC", "Service init...");
isEnded = false;
mRequestingLocationUpdates = false;
mLastUpdateTime = "";
// buildGoogleApiClient();
if (mGoogleApiClient.isConnected() && mRequestingLocationUpdates) {
startLocationUpdates();
}
return START_STICKY;
}
@Override
public void onConnected(Bundle bundle) {
startLocationUpdates();
}
@Override
public void onConnectionSuspended(int i) {
// The connection to Google Play services was lost for some reason. We call connect() to
// attempt to re-establish the connection.
Log.i(TAG, "Connection suspended==");
mGoogleApiClient.connect();
}
@Override
public void onLocationChanged(Location location) {
mCurrentLocation = location;
mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
double latitude = location.getLatitude();
double longitude = location.getLongitude();
StringBuilder stringBuilder = new StringBuilder();
StringBuilder latlong = stringBuilder.append(latitude + "," + longitude);
Calendar cal = Calendar.getInstance();
String zone = TimeZone.getDefault().getDisplayName(false, android.icu.util.TimeZone.SHORT);
SimpleDateFormat formatter = new SimpleDateFormat("dd-MMM 'at' h:mm a");
Date date = new Date();
String localtime = (formatter.format(date)).toString();
Date myDate = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTimeZone(TimeZone.getTimeZone("UTC"));
calendar.setTime(myDate);
date = calendar.getTime();
SimpleDateFormat dateFormatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss zz");
dateFormatter.setTimeZone(TimeZone.getTimeZone("UTC"));
String utc = dateFormatter.format(date);
// DateFormat df = DateFormat.getTimeInstance();
// df.setTimeZone(TimeZone.getTimeZone("gmt"));
// String gmtTime = df.format(new Date());
String model = Build.MODEL;
String reqString = Build.VERSION.RELEASE
+ " " + Build.VERSION_CODES.class.getFields()[android.os.Build.VERSION.SDK_INT].getName();
// Date currentTime = Calendar.getInstance().getTime();
// String localtime = currentTime.toString();
PreferencesClass preferencesClass = new PreferencesClass(mContext);
String id = preferencesClass.getFingerPrint();
Data data = null;
try {
JSONObject jsonObject = new JSONObject();
jsonObject.put("userId", id);
jsonObject.put("latLon", latlong);
jsonObject.put("timeZone", zone);
jsonObject.put("localTime", localtime);
jsonObject.put("osVersion", reqString);
jsonObject.put("phoneModel", model);
jsonObject.put("utcTime", utc);
data = new Data();
data.setData(jsonObject.toString());
if (data != null) {
if (Utility.isConnectingToInternet(mContext)) {
// boolean isChecked = preferencesClass.getIsChecked();
// if (isChecked){
LocationWebServiceMgr locationWebServiceMgr = new LocationWebServiceMgr();
locationWebServiceMgr.Location(data, new CallBackInterface() {
@Override
public void onResponse(ArrayList<Object> objects, ResponseMetaData responseMetaData) {
Log.d(TAG, "onResponse: Succesfully added the location to server");
// Toast.makeText(getApplicationContext(), "added to server", Toast.LENGTH_LONG).show();
}
@Override
public void onFailure(ResponseMetaData t) {
}
});
// } else {
// Log.d("serverCall", "Location Permission not available ");
// }
} else {
Log.e("serverCall", "Network not available");
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
// Refer to the javadoc for ConnectionResult to see what error codes might be returned in
// onConnectionFailed.
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + connectionResult.getErrorCode());
}
/**
* Builds a GoogleApiClient. Uses the {@code #addApi} method to request the
* LocationServices API.
*/
protected synchronized void buildGoogleApiClient() {
Log.i(TAG, "Building GoogleApiClient===");
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
createLocationRequest();
}
/**
* Sets up the location request. Android has two location request settings:
* {@code ACCESS_COARSE_LOCATION} and {@code ACCESS_FINE_LOCATION}. These settings control
* the accuracy of the current location. This sample uses ACCESS_FINE_LOCATION, as defined in
* the AndroidManifest.xml.
* <p/>
* When the ACCESS_FINE_LOCATION setting is specified, combined with a fast update
* interval (5 seconds), the Fused Location Provider API returns location updates that are
* accurate to within a few feet.
* <p/>
* These settings are appropriate for mapping applications that show real-time location
* updates.
*/
protected void createLocationRequest() {
mGoogleApiClient.connect();
mLocationRequest = new LocationRequest();
// Sets the desired interval for active location updates. This interval is
// inexact. You may not receive updates at all if no location sources are available, or
// you may receive them slower than requested. You may also receive updates faster than
// requested if other applications are requesting location at a faster interval.
mLocationRequest.setInterval(Constants.UPDATE_INTERVAL_IN_MILLISECONDS);
// Sets the fastest rate for active location updates. This interval is exact, and your
// application will never receive updates faster than this value.
mLocationRequest.setFastestInterval(Constants.FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
// mLocationRequest.setSmallestDisplacement(Constants.DISPLACEMENT);
//mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
/**
* Requests location updates from the FusedLocationApi.
*/
protected void startLocationUpdates() {
if (!mRequestingLocationUpdates) {
mRequestingLocationUpdates = true;
// The final argument to {@code requestLocationUpdates()} is a LocationListener
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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;
}
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
Log.i(TAG, " startLocationUpdates===");
isEnded = true;
}
}
}
答案 0 :(得分：0)
我处理如下，它对你有帮助
<强> RestartReceiver：
public class RestartReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
try {
//started service for update the location of userx
LocationsUpdateRequest.createLocationRequest(context);
//updated in my preference because I need to send data to server if user signed in app only
} catch (Exception e) {
LogUtils.crashlytics(e);
}
}
}
<强> ShutdownReceiver：
public class ShutdownReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
try {
//stop the service when phone is shotdown
LocationsUpdateRequest.getPendingIntent(context).cancel();
//reset flag in preference
} catch (Exception e) {
}
}
}
清单：
<receiver android:name=".services.ShutdownReceiver">
<intent-filter>
<action android:name="android.intent.action.ACTION_SHUTDOWN" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.QUICKBOOT_POWEROFF" />
</intent-filter>
</receiver>
<receiver android:name=".services.RestartReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>