onBeacon ServiceConnect method is to detect the beacon. For lollipop version is detecting for nougat and oreo version beacon not detecting:
public void onBeaconServiceConnect() {
RangeNotifier rangeNotifier = new RangeNotifier() {
#Override
public void didRangeBeaconsInRegion(Collection<Beacon> beacons, org.altbeacon.beacon.Region region) {
Log.d(TAG, "in didRangeBeaconsInRegion " + beacons.size());
if (beacons.size() > 0) {
Log.d(TAG, "didRangeBeaconsInRegion called with beacon count: " + beacons.size());
for (Iterator<Beacon> iterator = beacons.iterator();
iterator.hasNext(); ) {
Beacon beacon = iterator.next();
if (beaconlist.size() > 0) {
Log.d(TAG, "List Size :" + beaconlist.size());
for (int i = 0; i < beaconlist.size(); i++) {
Log.d("BeaconList ", beaconlist.get(i));
}
}
if (!beaconlist.contains(beacon.getId1().toString())) {
Log.d(TAG,"In get APi");
getApi(beacon.getId1().toString());
beaconlist.add(beacon.getId1().toString());
Log.d(TAG, "Notify in dead state");
Log.d("Notify in dead state", beacon.getId1().toString());
}
}
}
}
};
try {
Log.d(TAG, "I am in startRangingBeaconsInRegion");
beaconManager.startRangingBeaconsInRegion(new Region("myRangingUniqueId", null, null, null));
beaconManager.addRangeNotifier(rangeNotifier);
} catch (RemoteException e) {
e.printStackTrace();
}
}
This is my code can any one give solution for this issue.
Two things to check:
Have you added COARSE_LOCATION permission to your AndroidManifest.xml and added code to successfully obtain that permission from the user dynamically at runtime?
Do you successfully construct a BeaconManager, call bind(...) and verify you get a callback to onBeaconServiceConnect() before starting ranging? If you do not, you will get a RemoteException when you try to start ranging. It is a good idea to log this exception to LogCat with Log.e(TAG, "Not bound to beacon scanning service")
Related
I'm working on BluetoothLE, I want to see the devices around me in a list with their names, and I want to see the properties, services and characters of a device, but I can't see these devices even though the bluetooth of my phone and headset is turned on, the list always comes up empty.
Here is my sample code:
private GattCharacteristic gattCharacteristic;
private BluetoothLEDevice bluetoothLeDevice;
public List<DeviceInformation> bluetoothLeDevicesList = new List<DeviceInformation>();
public DeviceInformation selectedBluetoothLeDevice = null;
public bool IsScannerActiwe { get; set; }
public bool ButtonPressed { get; set; }
public bool IsConnected { get; set; }
public static string StopStatus = null;
public BluetoothLEAdvertisementWatcher watcher;
private DeviceWatcher deviceWatcher;
public void StartWatcher()
{
try
{
string[] requestedProperties = { "System.Devices.Aep.DeviceAddress", "System.Devices.Aep.IsConnected", "System.Devices.Aep.IsPresent", "System.Devices.Aep.ContainerId", "System.Devices.Aep.DeviceAddress", "System.Devices.Aep.Manufacturer", "System.Devices.Aep.ModelId", "System.Devices.Aep.ProtocolId", "System.Devices.Aep.SignalStrength" };
deviceWatcher =
DeviceInformation.CreateWatcher(
BluetoothLEDevice.GetDeviceSelectorFromPairingState(false),
requestedProperties,
DeviceInformationKind.AssociationEndpoint);
// Register event handlers before starting the watcher.
// Added, Updated and Removed are required to get all nearby devices
deviceWatcher.Added += DeviceWatcher_Added;
deviceWatcher.Updated += DeviceWatcher_Updated;
deviceWatcher.Removed += DeviceWatcher_Removed;
// EnumerationCompleted and Stopped are optional to implement.
deviceWatcher.EnumerationCompleted += DeviceWatcher_EnumerationCompleted;
deviceWatcher.Stopped += DeviceWatcher_Stopped;
// Start the watcher.
deviceWatcher.Start();
}
catch (Exception ex)
{
Console.WriteLine("Exception -> ", ex.Message);
}
}
public List<DeviceInformation> GetBluetoothLEDevicesList()
{
try
{
return bluetoothLeDevicesList;
}
catch (Exception ex)
{
Console.WriteLine("Exception Handled -> GetBluetoothLEDevices: " + ex);
throw ex;
}
}
public List<string> GetBluetoothLEDevices()
{
try
{
return bluetoothLeDevicesList.Select(x => x.Name).ToList();
}
catch (System.Exception ex)
{
Trace.WriteLine("Exception Handled -> GetBluetoothLEDevices: " + ex);
throw ex;
}
}
I started a few new advertisements with my iphone via the nrF Connect application and I can see it on my pc, but I want to put them all in a list and navigate through that list.
This is Test.cs:
class Test
{
static void Main(string[] args)
{
// Since the StartWatcher method is called from within the constructor method,
that method will always run whenever an instance is created.
BLEControllers bLEControllers = new BLEControllers();
var devices = bLEControllers.GetBluetoothLEDevicesList();
foreach (var device in devices)
{
if (device != null)
{
Console.WriteLine(device.Name);
}
Console.WriteLine("empty");
}
//bLEControllers.ConnectDevice(device);
//bLEControllers.ConnectDevice();
Console.Read();
}
}
Whenever I run this code, neither device names nor empty text appears on the console, only the startWatcher function works and ends. Is there any function to list all the devices? And how can I see the supported service and characteristic uuids? is there a way to do this?
For retrieve location i have used GoogleAPIClient with FusedLocationProvider API.
These functions are in onCreate() method.
createLocationRequest();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
gpsChecker();
Full Code
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
public void gpsChecker() {
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(mLocationRequest);
builder.setAlwaysShow(true);
PendingResult<LocationSettingsResult> result =
LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
#Override
public void onResult(LocationSettingsResult result) {
final Status status = result.getStatus();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
// All location settings are satisfied. The client can initialize location
// requests here.
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
// Location settings are not satisfied. But could be fixed by showing the user
// a dialog.
try {
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
status.startResolutionForResult(
AddVisitActivity.this, 1000);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
// Location settings are not satisfied. However, we have no way to fix the
// settings so we won't show the dialog.
break;
}
}
});
}
For run time permissions i did this.
protected void startLocationUpdates() {
if (ActivityCompat.shouldShowRequestPermissionRationale
(AddVisitActivity.this, android.Manifest.permission.ACCESS_FINE_LOCATION)) {
Snackbar.make(findViewById(android.R.id.content),
"Please Grant Permissions",
Snackbar.LENGTH_INDEFINITE).setAction("ENABLE",
new View.OnClickListener() {
#Override
public void onClick(View v) {
if (ActivityCompat.checkSelfPermission(AddVisitActivity.this, android.Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(AddVisitActivity.this,
new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
REQUEST_CODE_LOCATION);
} else {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, AddVisitActivity.this);
Log.d(TAG, "Location update started ...: ");
}
}
}).show();
} else {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
REQUEST_CODE_LOCATION);
} else {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
Log.d(TAG, "Location update started ...: ");
}
}
}
For checking if the GPS enabled or not in setting screen using gpsChecker() with request code 1000 and in onActivityResult() i have done this.
if (requestCode == 1000) {
switch (resultCode) {
case Activity.RESULT_OK:
Log.i(TAG, "User agreed to make required location settings changes.");
startLocationUpdates();
break;
case Activity.RESULT_CANCELED:
Log.i(TAG, "User chose not to make required location settings changes.");
finish();
break;
}
}
While i execute this code in some devices its working and in some device the location request automatically set to Device Only or Battery Saving though i have set mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
Note : Mi Note 4, Vivo V9 Pro, Mi Note 5 Pro and some other device getting the issue
So what should i need to change in my code so will it work proper with the High Accuracy?
Finally solved by changing
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
to
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
and change
private static final long INTERVAL = 1000 * 60 * 60;
private static final long FASTEST_INTERVAL = 1000 * 5;
interval time to 30 minutes and fastest interval to 5 seconds means once get location in 5 seconds after then new location will be get in 30 minutes.
Try this solutin with GPS Provider and make sure that your GPS service is ON.
static final int LOCATION_INTERVAL = 1000;
static final float LOCATION_DISTANCE = 10f;
//put this in onCreate();
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
mprovider = locationManager.getBestProvider(criteria, false);
if (mprovider != null && !mprovider.equals("")) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
Location location = locationManager.getLastKnownLocation(mprovider);
locationManager.requestLocationUpdates(mprovider, LOCATION_INTERVAL, LOCATION_DISTANCE, this);
if (location != null)
onLocationChanged(location);
else
Toast.makeText(getBaseContext(), "No Location Provider Found Check Your Code", Toast.LENGTH_SHORT).show();
}
//put this LocationListener after onCreate();
public LocationListener mLocationListener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
if (location != null) {
Log.e(String.format("%f, %f", location.getLatitude(), location.getLongitude()), "");
Log.e("Location available", "Location available");
locationManager.removeUpdates(mLocationListener);
} else {
Log.e("Location is null", "Location is null");
}
current_latitude = location.getLatitude();
current_longitude = location.getLongitude();
/* LatLng latLng = new LatLng(current_latitude, current_longitude);
points.add(latLng);
redrawLine();*/
Log.e("current_latitude", String.valueOf(current_latitude));
Log.e("current_longitude", String.valueOf(current_longitude));
if (location.hasSpeed()) {
//progressBarCircularIndeterminate.setVisibility(View.GONE);
String speed = String.format(Locale.ENGLISH, "%.0f", location.getSpeed() * 3.6) + "km/h";
SpannableString s = new SpannableString(speed);
s.setSpan(new RelativeSizeSpan(0.25f), s.length() - 4, s.length(), 0);
txt_current_speed.setText(s);
}
}
#Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
#Override
public void onProviderEnabled(String s) {
}
#Override
public void onProviderDisabled(String s) {
}
};
I'm rebuilding a ble app that will commnunicate with a bluetooth device.
The code I found had this odd method called after closing the connection,
bluetoothGatt.disconnect();
which will call the onStateChangeCallback.
The method is this;
private void refreshDeviceCache(final BluetoothGatt gatt) {
int cnt = 0;
boolean success = false;
try {
if (gatt != null) {
final Method refresh = gatt.getClass().getMethod("refresh");
if (refresh != null) {
success = (Boolean) refresh.invoke(gatt);
while (!success && cnt < 100) {
success = (Boolean) refresh.invoke(gatt);
cnt++;
}
Log.e(TAG, "retry refresh : " + cnt + " " + success);
}
}
} catch (Exception e) {
Log.e(TAG, "5", e);
}
}
I can't totally understand what this code will do, but in conclusion, it slows down the connection after the disconnection. It does not slow down the disconnection.
I really can't understand this because after I get the BluetoothProfile.STATE_DISCONNECTED, I will close the bluetoothGatt, and on the broadCastReceiver, unbind the service and close the service itself.
On the connection phase, the service will be recreated.
What line of that code on disconnection may slow down the connection? Please help me out with this.
The latest Android Wear update comes with support for ChannelApi that can be used for sending files to/from wearable or handheld. The problem is I cannot find a single sample of how to use this functionality. The Android samples doesn't include this feature. So if anyone knows how to use the sendFile/receiveFile and can give a quick example here it would be appreciated.
Take a look on this answer to know how to use the Channel API to create the channel between the devices.
After you create the googleClient and retrive the nodeId of the device you want to send the file to, basically you can use the following code on the wearable side:
//opening channel
ChannelApi.OpenChannelResult result = Wearable.ChannelApi.openChannel(googleClient, nodeId, "/mypath").await();
channel = result.getChannel();
//sending file
channel.sendFile(googleClient, Uri.fromFile(file));
Then, on the handheld device:
//receiving the file
#Override
public void onChannelOpened(Channel channel) {
if (channel.getPath().equals("/mypath")) {
file = new File("/sdcard/file.txt");
try {
file.createNewFile();
} catch (IOException e) {
//handle error
}
channel.receiveFile(mGoogleApiClient, Uri.fromFile(file), false);
}
}
//when file is ready
#Override
public void onInputClosed(Channel channel, int i, int i1) {
MainActivity.this.runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(MainActivity.this, "File received!", Toast.LENGTH_SHORT).show();
}
});
}
If you need more information about this, please visit the reference site from Google
This is just an add to the answer: also check your WearableListenerService in androidmanifest. It's intent filter should contain the com.google.android.gms.wearable.CHANNEL_EVENT action.
I have used some code like this with success. Transfers can be fairly slow.
Both the handheld and wearable applications MUST HAVE the same applicationId in their gradle files.
The wearable needs a manifest entry something like this
<service
android:name="com.me.myWearableListenerService"
android:enabled="true"
android:exported="true">
<intent-filter>
<!-- listeners receive events that match the action and data filters -->
<action android:name="com.google.android.gms.wearable.CHANNEL_EVENT"/>
<data android:scheme="wear" android:host="*" android:pathPrefix="/MyAppPath" />
</intent-filter>
</service>
to launch its WearableListenerService when the Handheld sends a file.
private static final String WEARABLE_FILE_COPY = "MyAppPath/FileCopy";
private void copyFileToWearable (final File file, final String nodeId, Context ctx) {
new Thread(new Runnable() {
#Override
public void run() {
final ChannelClient cc = Wearable.getChannelClient(ctx);
ChannelClient.ChannelCallback ccb = new ChannelClient.ChannelCallback() {
#Override
public void onChannelClosed(#NonNull ChannelClient.Channel channel, int i, int i1) {
super.onChannelClosed(channel, i, i1);
Log.d(TAG, "copyFileToWearable " + channel.getNodeId() + " onChannelClosed ");
cc.unregisterChannelCallback(this);
}
#Override
public void onOutputClosed(#NonNull ChannelClient.Channel channel, int i, int i1) {
super.onOutputClosed(channel, i, i1);
Log.d(TAG, "copyFileToWearable " + channel.getNodeId() + " onOutputClosed ");
cc.unregisterChannelCallback(this);
// this is transfer success callback ...
}
};
ChannelClient.Channel c;
Log.d(TAG, "copyFileToWearable transfer file " + file.getName() +
" size:" + file.length()/1000000 + "Mb");
try {
// send the filename to the wearable with the channel open
c = Tasks.await(cc.openChannel(nodeId, WEARABLE_FILE_COPY + "/" + file.getName()));
Log.d(TAG, "copyFileToWearable channel opened to " + nodeId);
Log.d(TAG, "copyFileToWearable register callback");
Tasks.await(cc.registerChannelCallback(c, ccb));
Log.d(TAG, "copyFileToWearable sending file " + file.getName());
Tasks.await(cc.sendFile(c, Uri.fromFile(file)));
// completion is indicated by onOutputClosed
} catch (Exception e) {
Log.w(TAG, "copyFileToWearable exception " + e.getMessage());
cc.unregisterChannelCallback(ccb);
// failure
}
}
}).start();
}
call this from onChannelOpened in a WearableListenerService when c.getPath() starts with WEARABLE_FILE_COPY
private void receiveFileFromHandheld(final ChannelClient.Channel c, File myStorageLocation, Context ctx) {
// filename sent by the handheld is at the end of the path
String[] bits = c.getPath().split("\\/");
// store in a suitable spot
final String receivedFileName = myStorageLocation.getAbsolutePath() + "/" + bits[bits.length-1];
new Thread(new Runnable() {
#Override
public void run() {
final ChannelClient cc = Wearable.getChannelClient(ctx);
ChannelClient.ChannelCallback ccb = new ChannelClient.ChannelCallback() {
boolean mClosed = false;
#Override
public void onChannelClosed(#NonNull ChannelClient.Channel channel, int i, int i1) {
super.onChannelClosed(channel, i, i1);
Log.d(TAG, "receiveFileFromHandheld " + channel.getNodeId() + " onChannelClosed ");
if (!mClosed){
// failure ...
}
}
#Override
public void onInputClosed(#NonNull ChannelClient.Channel channel, int i, int i1) {
super.onInputClosed(channel, i, i1);
Log.d(TAG, "receiveFileFromHandheld " + channel.getNodeId() + " onInputClosed ");
long fs = new File(receivedFileName).length();
Log.d(TAG, "receiveFileFromHandheld got " + receivedFileName +
" size:" + fs / 1000000 + "Mb");
cc.unregisterChannelCallback(this);
mClosed = true;
// success !
}
};
try {
Log.d(TAG, "receiveFileFromHandheld register callback");
Tasks.await(cc.registerChannelCallback(c, ccb));
Log.d(TAG, "receiveFileFromHandheld receiving file " + receivedFileName);
Tasks.await(cc.receiveFile(c, Uri.fromFile(new File(receivedFileName)), false));
// completion is indicated by onInputClosed
} catch (Exception e) {
Log.w(TAG, "receiveFileFromHandheld exception " + e.getMessage());
cc.unregisterChannelCallback(ccb);
// failure ...
}
}
}
).start();
}
I know that there are lot of questions about this but I couldn't figure out the solution from those questions.
I am getting null in a token from GCM. many people have done this using class, but I am doing
this in background thread in same class. It returns null in regId.
OnCreate
if (checkPlayServices()) {
gcm = GoogleCloudMessaging.getInstance(this);
regid = getRegistrationId(context);
if (regid.isEmpty()) {
Log.e(TAG, "registering in background");
registerInBackground();
} else {
Log.e(TAG, "Notification Token : " + regid);
user.setNotificationToken(regid);
}
} else {
MyLog.i(TAG, "No valid Google Play Services APK found.");
}
RegisterInBackgroud() if device is not registered before.
private void registerInBackground() {
new AsyncTask<Void, Void, String>() {
#Override
protected String doInBackground(Void... params) {
String msg = "";
try {
Log.e(TAG, "doing in background");
if (gcm == null) {
gcm = GoogleCloudMessaging.getInstance(context);
}
if(gcm != null)
{
Log.e(TAG, "GCM is not null");
}
regid = gcm.register(SENDER_ID);
Log.e(TAG, "token id:" + regid);
msg = "Device registered, registration ID=" + regid;
storeRegistrationId(context, regid);
} catch (IOException ex) {
msg = "Error :" + ex.getMessage();
}
return msg;
}
}.execute(null, null, null);
}
I tried to log it bug it display null in regId. what could be the problem in this ?
Some how my app id was not working. Recreating app on google console generated a new id which i used in my project and it started working.