i am in real trouble here. Trying to get lat and lon with a background service every 3 sec but i am only able to get some data written when i click send lat and lon in extended controls of the emulator , so both phone and emulator are not working. Here is my code below, it would be awesome if someone could help me. Thanks!
Service
public class GPSService extends Service {
private static final String TAG = "GpsService";
private LocationListener locationListener;
private LocationManager locationManager;
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
locationListener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
Intent i = new Intent("location_update");
i.putExtra("latExtra",location.getLatitude());
i.putExtra("lonExtra",location.getLongitude());
sendBroadcast(i);
Log.i(TAG, "onLocationChanged: extras lat lon"+location.getLatitude()+" "+location.getLongitude());
}
#Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
#Override
public void onProviderEnabled(String s) {
}
#Override
public void onProviderDisabled(String s) {
Log.i(TAG, "onProviderDisabled: DISABLED");
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);
Criteria c = new Criteria();
String provider =locationManager.getBestProvider(c,true);
Log.i(TAG, "onCreate: bestProvider "+provider);
//noinspection MissingPermission
locationManager.requestLocationUpdates(provider,2000,0,locationListener);
}
#Override
public void onDestroy() {
super.onDestroy();
if (locationManager != null){
Log.i(TAG, "onDestroy: Location manager nije null i brisem");
//noinspection MissingPermission
locationManager.removeUpdates(locationListener);
}
}
}
MainActivity
private final String TAG = "Main";
...
BroadcastReceiver broadcastReciever;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//setStatusBarTranslucent(false);
if(!runtimePermisions()){
startLocationUpdate();}
...
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//stopService();
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
//REQUEST PERMISSION
Log.i(TAG, "onClick: NO PERMISION");
} else {
Log.i(TAG, "onClick: got permision");
}
...
}
public void startLocationUpdate(){
Intent i = new Intent(this,GPSService.class);
startService(i);
Log.i(TAG, "startLocationUpdate: Pokrenuo sam service");
}
#Override
protected void onResume() {
super.onResume();
if (broadcastReciever == null){
broadcastReciever = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
lat = (Double) intent.getExtras().get("latExtra");
lon = (Double) intent.getExtras().get("lonExtra");
Log.i(TAG, "onReceive: lat lon "+lat+" "+lon);
}
};
}
registerReceiver(broadcastReciever,new IntentFilter("location_update"));
}
#Override
protected void onDestroy() {
super.onDestroy();
if (broadcastReciever!=null){
unregisterReceiver(broadcastReciever);
}
}
#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){
startLocationUpdate();
}else{
runtimePermisions();}
}
}
private boolean runtimePermisions() {
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_COARSE_LOCATION,
Manifest.permission.ACCESS_FINE_LOCATION,
},100);
return true;
}
return false;
}
MANIFEST
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.digiart.yoweather">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SettingsActivity"
android:theme="#style/SettingsTheme"></activity>
<service android:name=".Gps.GPSService"/>
</application>
</manifest>
Again... Any help would be great! THANKS :D
As K. Sopheak said, it can take a while to get the location. From the documentation:
It may take a while to receive the first location update. If an immediate location is required, applications may use the getLastKnownLocation(String) method.
So, you could try getting the last known location using getLastKnownLocation(String) when the service is started and, assuming it exists, broadcast it in the same way you would a location update. Bear in mind, though, that the last known location could be out of date. Depending on what you're using the location for this may or may not be acceptable.
Also, as an aside, a couple of thoughts:
You said 3 seconds, but the code uses 2,000 milliseconds - was that just a typo?
The frequency of location updates is a minimum time - you are not guaranteed to get updates that often. As per the documentation:
The location update interval can be controlled using the minTime parameter. The elapsed time between location updates will never be less than minTime, although it can be more depending on the Location Provider implementation and the update interval requested by other applications.
Is there any particular reason you need location updates at such a high frequency? Obtaining a location can be battery intensive, particularly given that you are requesting FINE as well as COARSE location permissions, so requesting it so frequently could place an enormous drain on device battery life. This is particularly so given that the code is running in a service and will therefore continue to run even when the application is in the background or the user is in an activity which does not require location data. Again, from the documentation:
Choosing a sensible value for minTime is important to conserve battery life. Each location update requires power from GPS, WIFI, Cell and other radios. Select a minTime value as high as possible while still providing a reasonable user experience. If your application is not in the foreground and showing location to the user then your application should avoid using an active provider (such as NETWORK_PROVIDER or GPS_PROVIDER), but if you insist then select a minTime of 5 * 60 * 1000 (5 minutes) or greater. If your application is in the foreground and showing location to the user then it is appropriate to select a faster update interval.
Google recommends using the Google Play services location APIs instead of the Android framework location APIs:
The Google Play services location APIs are preferred over the Android framework location APIs (android.location) as a way of adding location awareness to your app. If you are currently using the Android framework location APIs, you are strongly encouraged to switch to the Google Play services location APIs as soon as possible.
Related
The addProximityAlert call stopped triggering alerts on Android 11 devices.
I call the addProximityAlert for the special locations (calculated for the user location) from the Application.onCreate method or whenever the ACCESS_FINE_LOCATION permission is granted using the following code:
mLocationManager = (LocationManager) mApplicationContext.getSystemService(Context.LOCATION_SERVICE);
if (mLocationManager != null) {
final Criteria criteria = new Criteria();
//criteria.setAccuracy(Criteria.ACCURACY_COARSE);
criteria.setAccuracy(Criteria.ACCURACY_FINE);
String provider = mLocationManager.getBestProvider(criteria, true);
if (!TextUtils.isEmpty(provider)) {
mLocationUpdatelistener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
subscribeForProximityAlert(location);
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onProviderDisabled(String provider) {
}
};
final Location lastKnownLocation = mLocationManager.getLastKnownLocation(provider);
if (lastKnownLocation == null) {
try {
mLocationManager.requestSingleUpdate(criteria, mLocationUpdatelistener, Looper.getMainLooper());
} catch (Throwable e) {
e.printStackTrace();
}
} else {
subscribeForProximityAlert(lastKnownLocation);
}
}
}
The subscribeForProximityAlert function is as follows (it is called actually after the successful single location update - I've checked that):
void subscribeForProximityAlert(Location location) {
String id;
double lat;
double lng;
long radius;
// ... compute the params above using the location
final Intent intent = new Intent(ACTION_FILTER);
intent.putExtra("_id", id);
intent.putExtra("_lat", lat);
intent.putExtra("_lng", lng);
intent.putExtra("_rad", radius);
final PendingIntent pendingIntent = PendingIntent.getBroadcast(mApplicationContext, i, intent, 0);
mPendingIntents.add(pendingIntent);
mLocationManager.addProximityAlert(
lat,
lng,
(float) radius,
24 * 60 * 60 * 1000,
pendingIntent
);
}
The ACTION_FILTER is the com.example.appname.ProximityAlert exactly the value I use in manifest to subscribe for the Proximity Alert broadcasts (com.example.appname is the package name of the app):
<application>
<receiver android:name="com.example.appname.ProximityAlertBroadcastReceiver">
<intent-filter>
<action android:name="com.example.appname.ProximityAlert" />
</intent-filter>
</receiver>
</application>
The ProximityAlertBroadcastReceiver can be as simple as:
public class ProximityAlertBroadcastReceiver extends BroadcastReceiver {
public ProximityAlertBroadcastReceiver() {
}
#Override
public void onReceive(Context context, Intent intent) {
}
}
its onReceive method is never called on Android 11 devices (checked with Lod.d and Toast.makeText...show() calls). Not when the app is running, not when it's in background. Not when I'm already in the radius of specified point, not when I'm entering/exiting.
Tried to add the android.permission.ACCESS_BACKGROUND_LOCATION permission to the manifest (nothing about it in the LocationManager.addProximityAlerts docs anyway) and grant the permission in system settings for the app, but it didn't help.
Also tried to reduce the targetSdkVersion from 30 to 28, but it didn't help.
The problem happened because of the implicit intent for the broadcast receiver, which is prohibited for the app targeting Android 8+ (SDK version 26):
https://developer.android.com/about/versions/oreo/background#broadcasts
After changing the
final Intent intent = new Intent(ACTION_FILTER);
to
final Intent intent = new Intent(mApplicationContext, ProximityAlertBroadcastReceiver.class);
I started to receive the broadcasts.
UPDATE: There's a bug in recent Android versions (11, 12, maybe others) which makes Geofences unresponsive on some devices and completely non-working on other devices if no app is actively requesting location at the moment:
https://issuetracker.google.com/issues/218335535
addProximityAlert creates a geofence under the hood, so it's affected too.
I have a LocationActivity that gets the GPS location from the Google API. I need to use this data in my MainActivity. I am using startActivityForResult to accomplish this, but my LocationActivity never executes and my app crashes when I try to access the data.
Here is are some relevant snippets from MainActivity.java:
public void onUpdateClick(View v) { //button click handler which starts the process
Intent i = new Intent(MainActivity.this, LocationActivity.class);
startActivityForResult(i, GPS_DATA_REQUEST);
byte[] data = latitude.getBytes(); //app crashes here because latitude is null
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == GPS_DATA_REQUEST) {
if(resultCode == Activity.RESULT_OK){
latitude=data.getStringExtra("latitude");
}
}
}
And here are relevant snippets from LocationActivity.java:
#Override
public void onConnected(Bundle bundle) {
mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest,this);
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
if (mLastLocation != null) {
latitude = String.valueOf(mLastLocation.getLatitude());
}
Intent returnIntent = new Intent();
returnIntent.putExtra("latitude",latitude);
setResult(LocationActivity.RESULT_OK, returnIntent);
finish();
}
And my Android Manifest:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/label_broadcast">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".LocationActivity">
</activity>
</application>
I have referred to many threads and the Android activity/intent documentation but have not been able to solve this. Any help/suggestions would be appreciated. I have tried to provide only the relevant information. Thanks!
Move the code in LocationActivity from onConnected to onStart. startActivityForResult invokes the onStart lifecycle method.
You cant used
byte[] data = latitude.getBytes();
At time of activity start latitude will be null
Update your code with this.
public void onUpdateClick(View v) { //button click handler which starts the process
Intent i = new Intent(MainActivity.this, LocationActivity.class);
startActivityForResult(i, GPS_DATA_REQUEST);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == GPS_DATA_REQUEST) {
if(resultCode == Activity.RESULT_OK){
latitude=data.getStringExtra("latitude");
byte[] data = latitude.getBytes();
}
}
}
It not looks good.. Once it is connected to location service it looks like you finish second activity.. Then it will kill your second activity and again resumes your first activity. Here, you need to change logic in LocationActivity
You can try change LocationActivity.java
Intent returnIntent = new Intent(LocationActivity.this,MainActivity.class);
returnIntent.putExtra("latitude",latitude);
setResult(LocationActivity.RESULT_OK, returnIntent);
Problem is on LocationActivity class on line
setResult(LocationActivity.RESULT_OK, returnIntent);
Actually you need
setResult(GPS_DATA_REQUEST, returnIntent);
You can try this. I hope you will get you solution.
MainActivity.java
public void onUpdateClick(View v) { //button click handler which starts the process
Intent i = new Intent(MainActivity.this, LocationActivity.class);
startActivityForResult(i, GPS_DATA_REQUEST);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == GPS_DATA_REQUEST) {
if(resultCode == Activity.RESULT_OK){
latitude=data.getStringExtra("latitude");
if(latitude != null)
byte[] data = latitude.getBytes();
else
//do request again for latitude.
}
}
}
You need to set result in you LocationActivity.java
Intent returnIntent = new Intent(LocationActivity.this, MainActivity.class);
returnIntent.putExtra("latitude",latitude);
setResult(RESULT_OK, returnIntent);
I had the same problem.
Then I realized that I've initialized and declared my views before the second activity's OnCreate method is invoked. Putting declaration into OnCreate as shown below solved the problem.
public class Activity2 extends AppCompatActivity{
// View declaration, put your views here
TextView mTextViewExample;
EditText mEditTextExample;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity2);
setTitle(R.string.title_activity2);
// View initialization, put your views here
mTextViewExample = (TextView) findViewById(R.id.textViewExample);
mEditTextExample = (EditText) findViewById(R.id.editTextExample);
}
}
Actually I'm building an application which requires user's location. But I'm getting SERVICE_VERSION_UPDATE_REQUIRED error. Following are my MainActivity.java and AndroidManifest.xml files:
MainActivity.java
TextView lat, lon;
private static final String TAG = MainActivity.class.getSimpleName();
private FusedLocationProviderApi locationProvider = LocationServices.FusedLocationApi;
private GoogleApiClient googleApiClient;
private LocationRequest locationRequest;
private double latitude, longitude;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lat = (TextView) findViewById(R.id.lat);
lon = (TextView) findViewById(R.id.lon);
if (googleApiClient == null) {
googleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
}
locationRequest = new LocationRequest();
locationRequest.setInterval(10000);
locationRequest.setFastestInterval(1000);
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
#Override
public void onConnected(#Nullable Bundle bundle) {
requestLocationUpdates();
}
private void requestLocationUpdates() {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.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(googleApiClient, locationRequest, this);
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
Log.d(TAG, connectionResult.toString());
}
#Override
public void onLocationChanged(Location location) {
latitude = location.getLatitude();
longitude = location.getLongitude();
lat.setText("Latitude: " + String.valueOf(latitude));
lon.setText("Longitude: " + String.valueOf(longitude));
}
#Override
protected void onStart() {
super.onStart();
googleApiClient.connect();
}
#Override
protected void onResume() {
super.onResume();
if (googleApiClient.isConnected()) {
requestLocationUpdates();
}
}
#Override
protected void onPause() {
super.onPause();
LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient, this);
}
#Override
protected void onStop() {
super.onStop();
googleApiClient.disconnect();
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.harshil.location">
<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" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Here is what logcat says:
D/MainActivity: ConnectionResult{statusCode=SERVICE_VERSION_UPDATE_REQUIRED, resolution=null, message=null}
So, How to get through this problem?
I solved my problem by changing following line [in build.gradle] from:
compile 'com.google.android.gms:play-services:10.0.1'
to:
compile 'com.google.android.gms:play-services:9.8.0'
So, the problem is I am using higher version of Google Play Service for development than that installed on my device or emulator.
I came to my solution as follow:
1. I checked to update Google Play Service on my device but it says it is up-to-date.
2. I checked in App Manager to see the version of it, and I came to know that it is actually at 9.8.77. So I changed play-service version from 10.0.1 to 9.8.0.
Now, I am out of this problem.
Thank you.
Download the the google play store in your mobile and check it .for me i was not installed google play store in my mobile now i installed google play store ,its working fine.
I am developing an App to check Wifi points.
I am getting error "java.lang.SecurityException: Need ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION permission to get scan results" at wifiManager.getScanResults() even though I already declared those permissions.
main activity
public class MainActivity extends AppCompatActivity {
WifiManager wifiManager;
String[] wifis;
WifiReceiver wifiReceiver;
ListView wifiListView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
wifiListView = (ListView) findViewById(R.id.wifi_list);
wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
wifiReceiver = new WifiReceiver();
wifiManager.startScan();
}
protected void onPause() {
unregisterReceiver(wifiReceiver);
super.onPause();
}
protected void onResume() {
registerReceiver(wifiReceiver, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
super.onResume();
}
private class WifiReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
List<ScanResult> wifiScanList = wifiManager.getScanResults();
wifis = new String[wifiScanList.size()];
for (int i = 0; i < wifiScanList.size(); i++) {
wifis[i] = wifiScanList.get(i).toString();
}
wifiListView.setAdapter(new ArrayAdapter<>(getApplicationContext(), android.R.layout.simple_list_item_1, wifis));
}
}
manifest
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.sample">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
I am on SDK 6.0
I observed similar question, but solution does not apply since I already declared permission.
Anyone know what might be problem? Thank you.
In Android M, you need to ask for the permission which is defined as dangerous in PermissionModel to the user before start using each time, it as such:
private boolean mayRequestLocation() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
return true;
}
if (checkSelfPermission(ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
return true;
}
if (shouldShowRequestPermissionRationale(ACCESS_FINE_LOCATION)) {
Snackbar.make(mView, R.string.permission_rationale, Snackbar.LENGTH_INDEFINITE)
.setAction(android.R.string.ok, new View.OnClickListener() {
#Override
#TargetApi(Build.VERSION_CODES.M)
public void onClick(View v) {
requestPermissions(new String[]{ACCESS_FINE_LOCATION}, REQUEST_FINE_LOCATION);
}
});
} else {
requestPermissions(new String[]{ACCESS_FINE_LOCATION}, REQUEST_FINE_LOCATION);
}
return false;
}
Add this to your Activity:
private static final int REQUEST_FINE_LOCATION=0
and load it during runtime with:
loadPermissions(Manifest.permission.ACCESS_FINE_LOCATION,REQUEST_FINE_LOCATION);
To evaluate the results of your permission request, you can override onRequestPermissionsResult method:
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case REQUEST_FINE_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// The requested permission is granted.
}
else{
// The user disallowed the requested permission.
}
return;
}
}
MADAO is right: you should turn on GPS to get the WIFI access point list.
But I'm not sure about PEERS_MAC_ADDRESS. If you look at the source code (line 957):
/**
* Return the results of the most recent access point scan, in the form of
* a list of {#link ScanResult} objects.
* #return the list of results
*/
public List<ScanResult> getScanResults(String callingPackage) {
enforceAccessPermission();
int userId = UserHandle.getCallingUserId();
int uid = Binder.getCallingUid();
boolean canReadPeerMacAddresses = checkPeersMacAddress();
boolean isActiveNetworkScorer =
NetworkScorerAppManager.isCallerActiveScorer(mContext, uid);
boolean hasInteractUsersFull = checkInteractAcrossUsersFull();
long ident = Binder.clearCallingIdentity();
try {
if (!canReadPeerMacAddresses && !isActiveNetworkScorer
&& !isLocationEnabled()) {
return new ArrayList<ScanResult>();
}
if (!canReadPeerMacAddresses && !isActiveNetworkScorer
&& !checkCallerCanAccessScanResults(callingPackage, uid)) {
return new ArrayList<ScanResult>();
}
if (mAppOps.noteOp(AppOpsManager.OP_WIFI_SCAN, uid, callingPackage)
!= AppOpsManager.MODE_ALLOWED) {
return new ArrayList<ScanResult>();
}
if (!isCurrentProfile(userId) && !hasInteractUsersFull) {
return new ArrayList<ScanResult>();
}
return mWifiStateMachine.syncGetScanResultsList();
} finally {
Binder.restoreCallingIdentity(ident);
}
}
The first if is checking canReadPeerMacAddresses which the code for checkPeersMacAddress() is:
/**
* Returns true if the caller holds PEERS_MAC_ADDRESS.
*/
private boolean checkPeersMacAddress() {
return mContext.checkCallingOrSelfPermission(
android.Manifest.permission.PEERS_MAC_ADDRESS) == PackageManager.PERMISSION_GRANTED;
}
If you add the permission you can bypass if (!canReadPeerMacAddresses && !isActiveNetworkScorer && !isLocationEnabled()) {. I've tested but I cannot get WIFI MAC list by just using the permission and disabling location.
ACCESS_FINE_LOCATION or ACCESS_COARSE_LOCATION is necessary. To get a valid result, you also have to turn on GPS or get a PEERS_MAC_ADDRESS permission like Setting.
Hi i am trying to get the device location using the Location api in android using the device network or wifi connection. However it doesnt seem to get the latt or longitude.
i have created a location provider and manager, and registered a location listener.
i then
launched
locationManagaer.requestLocationUpdates(locationProvide.getName(),TIME_INTERVAL, DISTANCE, this);
and from that point on, the app doesnt retrieve new location changes at all. what am i missing?
here is my userLocation Code
public class UserLocation implements LocationListener{
public static final int UPDATE_LATT = 0;
private static final int TIME_INTERVAL = 1000;
private static final int DISTANCE = 10;
private LocationManager locationManagaer;
private LocationProvider locationProvide;
private Handler mHandler;
public UserLocation(Context context, Handler handler){
locationManagaer = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
locationProvide = locationManagaer.getProvider(LocationManager.NETWORK_PROVIDER);
mHandler = handler;
}
public void startSearchLocation(){
Log.d("", "sart location search");
locationManagaer.requestLocationUpdates(locationProvide.getName(),TIME_INTERVAL, DISTANCE, this);
}
#Override
public void onLocationChanged(Location location) {
Log.d("", "location update on " + location.getLongitude());
Message.obtain(mHandler,UPDATE_LATT, new Position(location.getLongitude(), location.getLatitude()));
}
#Override
public void onProviderDisabled(String provider) {
Log.d("", "onProviderDisabled");
}
#Override
public void onProviderEnabled(String provider) {
Log.d("", "onProviderEnabled");
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.d("", "onStatusChanged");
}
}
here is my activity that uses this class to setup and listen for new locations
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mHandler = new Handler() {
#Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
position = (Position) msg.obj;
Toast.makeText(
getApplicationContext(),
position.getLattitude() + " " + position.getLongetude(),
Toast.LENGTH_LONG).show();
}
};
userLocation = new UserLocation(this, mHandler);
initializeViews();
userLocation.startSearchLocation();
}
Here is my position POJO
public class Position {
private double longetude;
private double lattitude;
public Position(){
}
public Position(double longetude, double lattitude){
}
public double getLongetude() {
return longetude;
}
public void setLongetude(double longetude) {
this.longetude = longetude;
}
public double getLattitude() {
return lattitude;
}
public void setLattitude(double lattitude) {
this.lattitude = lattitude;
}
}
Here is part of my manifest file
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.jr.haliotest.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
Logcat:
03-23 20:19:14.309: D/(16992): sart location search
03-23 20:19:14.384: E/(16992): file /data/data/com.nvidia.NvCPLSvc/files/driverlist.txt: not found!
03-23 20:19:14.384: I/(16992): Attempting to load EGL implementation /system/lib//egl/libEGL_tegra_impl
03-23 20:19:14.449: I/(16992): Loaded EGL implementation /system/lib//egl/libEGL_tegra_impl
03-23 20:19:14.514: I/(16992): Loading GLESv2 implementation /system/lib//egl/libGLESv2_tegra_impl
Testing on a htc one x thats rooted if that helps. wifi is on and god signal
If you are within a building then it is probably that your device is not able to connect to a GPS Provider. I would suggest if you move to a more open space so that you can get a signal.
One hint that if the device is connected to receive a gps signal. The sign of the gps will stop blinking and will become solid.
I would start by checking if your phones location services are enabled and maybe try rebooting. Also try using "GPS" instead of "network" to see if the problem is related to your network not providing location info.
From my experience wifi networks will sometimes simply not provide location info. I'm not sure if that's also true for cell networks, but I suspect there is no guarantee.