Develop Reference

checkSelfPermission is not working properly

I'm trying to do a quick test app that allow me to turn on a off Bluetooth and I code the listeners for clicks in the buttons. This is the one that turn Bluetooth on:
mOnBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (!mBlueAdapter.isEnabled()) {
showToast("Turning On Bluetooth...");
//intent to on BT
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
//Android Studio force me to do this check.
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
showToast("I'm stuck here");
return;
}
startActivityForResult(intent, REQUEST_ENABLE_BT);
} else {
showToast("Bluetooth is already on");
}
}
});
The thing is that Android Studio force me to add the:
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
showToast("I'm stuck here");
return;
}
check error but even I have all the permissions they asked me in AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.Bluetooth">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
the program always fails the check error and ended up in the "You're stuck message", what is happening here?

Turning bluetooth on and requesting `BLUETOOTH_CONNECT permission is a different thing.
Request permission like BLUETOOTH_CONNECT, see https://developer.android.com/training/permissions/requesting.
Turning bluetooth on
if (bluetoothAdapter?.isEnabled == false) {
val enableBtIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT)
}
If enabling Bluetooth succeeds, your activity receives the RESULT_OK result code in the onActivityResult() callback. If Bluetooth was not enabled due to an error (or the user responded "Deny") then the result code is RESULT_CANCELED.
See Set up Bluetooth for details.

App is not listed in Notification Access settings Android

I am creating an App to access some Notifications, below is my AndroidManifest.xml files. I installed my app but when i go to Notification Access settings of divice, i can't see my app listed in there, can anyone help me with this
<application
android:name=".MyApplication"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme"
tools:ignore="GoogleAppIndexingWarning">
<service
android:name="com.example.myapp.otp.MyService"
android:label="#string/service_name"
android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
<intent-filter>
<action android:name="android.service.
notification.NotificationListenerService" />
</intent-filter>
</service>
</application>
And here is MyService.class :
public class MyService extends NotificationListenerService {
#Override
public void onNotificationPosted(StatusBarNotification sbn) {
Notification mNotification = sbn.getNotification();
if (mNotification != null) {
Bundle extras = mNotification.extras;
Intent intent = new Intent(MainActivity.INTENT_ACTION_NOTIFICATION);
intent.putExtras(extras);
sendBroadcast(intent);
}
}
#Override
public void onNotificationRemoved(StatusBarNotification sbn) {
}
}

Firstly get the run time permission if your are using API above 22
if (Build.VERSION.SDK_INT > 22) {
requestPermissions(new String[]{Manifest.permission
.BIND_NOTIFICATION_LISTENER_SERVICE}, 1001);
}
You will get response in onRequestPermissionsResult for above permission
Then in your activity ask user is your app is allowed to access notification by getting notification listener component
Set<String> listnerSet = NotificationManagerCompat.getEnabledListenerPackages(this);
boolean haveAccess = false;
for (String sd : listnerSet) {
if (sd.equals("your -- package -- name")) {
haveAccess = true;
}
}
if (!haveAccess) {
startActivity(new Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS));
}

Branch.io initSession returns empty referringParams json

Preconditions
1. App starts with LinkActivity, at this point we have no deep link intent, it's ok.
Main activity launched. There we are able to click the deep link.
By clicking on deep link opens LinkActivity, uri is correct, referringParams json is not empty (ok). But...
When we replaying step 2: uri is correct, but the reffering params are empty: "{}"; All other tries are with the same result.
Only when we pausing the app (for example switching to the recent apps menu) and then returning to the app - deep link works as expected, but only at first try. May be some issues with the session close (but in the current version of the sdk it self controls session close)
public class LinkActivity extends AppCompatActivity {
private static final String TAG = LinkActivity.class.getSimpleName();
#Override
protected void onNewIntent(Intent intent) {
setIntent(intent);
}
#Override
protected void onStart() {
super.onStart();
Uri uri = getIntent().getData();
Log.w(TAG, "uri: " + uri);
Branch.getInstance().initSession(new Branch.BranchReferralInitListener() {
#Override
public void onInitFinished(JSONObject referringParams, BranchError error) {
Log.w(TAG, "json: " + referringParams);
startActivity(new Intent(LinkActivity.this, MainActivity.class));
}
}, uri, this);
}
}
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
public class BranchApplication extends Application {
#Override
public void onCreate() {
super.onCreate();
Branch.enableLogging();
Branch.getAutoInstance(this);
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.test.myapp">
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:name=".BranchApplication"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".LinkActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:host="myapp.link"
android:scheme="https" />
</intent-filter>
</activity>
<activity android:name=".MainActivity"/>
<meta-data
android:name="io.branch.sdk.BranchKey"
android:value="#string/branch_io_live_key" />
<meta-data
android:name="io.branch.sdk.BranchKey.test"
android:value="#string/branch_io_test_key" />
<meta-data
android:name="io.branch.sdk.TestMode"
android:value="false" />
</application>
</manifest>
implementation "io.branch.sdk.android:library:2.14.3"
Update:
Even with android:launchMode="singleInstance" for LinkActivity steel reproduces (I don't think this is the case).
Udpate2:
Bhardwaj mentioned that no need to call initSession when we initing Branch via getAutoInstance. But how to get refferingParams from uri in that case?
Update3:
From the Branch.checkIntentForSessionRestart doc:
Check for forced session restart. The Branch session is restarted if
the incoming intent has branch_force_new_session set to true. This is
for supporting opening a deep link path while app is already running
in the foreground. Such as clicking push notification while app in
foreground.
So, My desired behavior is matches this description. But how to force session restart?

You can try as mentioned below :-
Branch.getAutoInstance(this) -> Branch.getAutoInstance(this, true)
Branch.getInstance(context) -> Branch.getInstance()
Do not call initSession when you have getAutoInstance()

if(!initiatedBranchDeepLinks) {
// Configure Branch.io
initiatedBranchDeepLinks = true;
Branch branch = Branch.getInstance();
branch.initSession(new Branch.BranchReferralInitListener(){
#Override
public void onInitFinished(JSONObject referringParams, BranchError error) {
if (error == null) {
// params are the deep linked params associated with the link that the user clicked -> was re-directed to this app
// params will be empty if no data found
// ... insert custom logic here ...
String message = "Branch.io onInitFinished. Params: " + referringParams.toString();
Log.d(TAG, message);
} else {
Log.i(TAG, error.getMessage());
}
}
}, this.getIntent().getData(), this);
}
Here is Branch Test Bed app:
https://github.com/BranchMetrics/android-branch-deep-linking/tree/master/Branch-SDK-TestBed
You can use this as a reference and see what you are doing incorrectly.

This could be caused by your Manifest configuration. In your <activity> tag, you should include android:launchMode="singleTask". See this section of our docs. This may explain why you are receiving the parameters the first time, but not receiving them on a re-open.

Debugging a service Android

I'm trying to debugging a service in Android.
I've already put the line Debug.waitForDebugger(); in this method:
#Override
protected void onHandleIntent(Intent intent)
{
Debug.waitForDebugger();
Utilities.displayAlertDialog("on handle intent", this);
SharedPreferences sp = getSharedPreferences(getString(clyky.cartracker.R.string.sharedPreferencesName), Context.MODE_PRIVATE);
int userID = sp.getInt("id_user", SplashActivity.DEFAULT_USER_ID);
if (userID != SplashActivity.DEFAULT_USER_ID)
{
sendRequest(userID);
}
else
{
stopSelf();
}
}
I've put a breakpoint on line 2 (Utilities.displayAlertDialog("on handle intent", this);, but this breakpoint is never reached.
I'm debugging my app on my device and I'm using Android Studio.
EDIT
This is my entire service class. It retrieves some information from the database and puts all into an ArrayList:
public class RetrieveVehicleListService extends IntentService
{
private static final int NOTIFICATION_ID = 1;
private NotificationManager mNotificationManager;
private NotificationCompat.Builder builder;
private ArrayList<Vehicle> vehicles;
private void parseVehiclesFromMap(ArrayList vehicles)
{
for (int i = 0; i < vehicles.size(); i++)
{
final Vehicle v = new Vehicle();
HashMap vehicleMap = (HashMap) vehicles.get(i);
v.setPlate(vehicleMap.get("plate").toString());
v.setKm(vehicleMap.get("km") == null ? null : Integer.parseInt(vehicleMap.get("km").toString()));
v.setFuelQuantity(Double.parseDouble(vehicleMap.get("fuel_quantity").toString()));
v.setEffectiveFuelEconomy(Double.parseDouble(vehicleMap.get("fuel_economy").toString()));
v.setInsuranceDate(vehicleMap.get("insurance_date") == null ? null : new LocalDate(vehicleMap.get("insurance_date").toString()));
v.setMatriculationDate(new LocalDate(vehicleMap.get("matriculation_date").toString()));
v.setLatitude(vehicleMap.get("latitude") == null ? null : Double.parseDouble(vehicleMap.get("latitude").toString()));
v.setLongitude(vehicleMap.get("longitude") == null ? null : Double.parseDouble(vehicleMap.get("longitude").toString()));
v.setFuelType(FuelType.fromInt(Integer.parseInt(vehicleMap.get("id_fuel").toString())));
this.vehicles.add(v);
}
}
private void sendRequest(int userID)
{
Response.Listener<String> listener = new Response.Listener<String>()
{
#Override
public void onResponse(String response)
{
try
{
HashMap json = new ObjectMapper().readValue(response, HashMap.class);
String errorCode = json.get("error_code").toString();
switch (errorCode)
{
case "0":
parseVehiclesFromMap((ArrayList) json.get("vehicles"));
break;
default:
// TODO gestire
break;
}
}
catch (IOException e)
{
// TODO gestire
e.printStackTrace();
}
}
};
VehicleListRequest request = new VehicleListRequest(String.valueOf(userID), listener, null);
RequestQueue queue = Volley.newRequestQueue(this);
queue.add(request);
}
#Override
protected void onHandleIntent(Intent intent)
{
Debug.waitForDebugger();
Utilities.displayAlertDialog("on handle intent", this);
SharedPreferences sp = getSharedPreferences(getString(clyky.cartracker.R.string.sharedPreferencesName), Context.MODE_PRIVATE);
int userID = sp.getInt("id_user", SplashActivity.DEFAULT_USER_ID);
if (userID != SplashActivity.DEFAULT_USER_ID)
{
sendRequest(userID);
}
else
{
stopSelf();
}
}
public RetrieveVehicleListService()
{
super("RetrieveVehicleList");
vehicles = new ArrayList<>();
}
}
This is my BroadcastReceiver, which runs my RetrieveVehiclesListService when the internet connection is available:
public class NetworkWatcher extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent)
{
ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
Intent retrieveVehicleList = new Intent(context, RetrieveVehicleListService.class);
if (info != null)
{
if (info.isConnected())
{
if (!Utilities.vehicleFileExists(context))
{
context.startService(retrieveVehicleList);
}
}
else
{
context.stopService(retrieveVehicleList);
}
}
}
}
this is my manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest
xmlns:android="http://schemas.android.com/apk/res/android"
package="clyky.cartracker">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<!--
TODO crediti per le icone:
<div>Icons made by Dave Gandy from www.flaticon.com is licensed by CC 3.0 BY</div>
per la freccia in giù che espande il layout nella LoginActivity
<div>Icons made by Dave Gandy from www.flaticon.com is licensed by CC 3.0 BY</div>
per la freccia in su
<div>Icons made by Madebyoliver from www.flaticon.com is licensed by CC 3.0 BY</div>
per il lucchetto
Car rental icon credits
per l'icona della macchina
-->
<application
android:name=".AppGlobal"
android:allowBackup="true"
android:icon="#mipmap/ic_app_icon"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".activities.RegistrationActivity">
</activity>
<activity android:name=".activities.LoginActivity">
</activity>
<activity android:name=".activities.VehicleListActivity">
</activity>
<activity android:name=".activities.VehicleDetailsActivity">
</activity>
<activity android:name=".activities.AddVehicleActivity">
</activity>
<!--
The API key for Google Maps-based APIs is defined as a string resource
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="#string/google_maps_key"/>
<activity
android:name=".activities.SplashActivity"
android:theme="#style/SplashTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity android:name=".activities.MainActivity">
</activity>
<activity android:name=".activities.DrivingLicenseActivity">
</activity>
<receiver
android:name=".services.NetworkWatcher"
android:enabled="true"
android:exported="false">
</receiver>
<service
android:name=".services.RetrieveVehicleListService"
android:exported="false">
</service>
</application>
</manifest>

Connectivity Change Action:
If you want to detect change network connection use:
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
If you want to detect WiFi state Change use:
<action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
Change you receive as per below:
<receiver android:name=".services.NetworkWatcher">
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
</intent-filter>
</receiver>

You should completely remove the <receiver> tag from your AndroidManifest.xml because starting with Nougat (Android 7 API 24) you will not be able to receive connectivity change events in a receiver as stated here, because of new limitations to background services
You could be able to listen to CONNECTIVITY_ACTION only on your Main UI thread while the app is running and in foreground with a programmatically registered BroadCastReceiver, and this could be a good or a bad solution based on your use case.
What i suggest you, it's to read this answer: https://stackoverflow.com/a/39880860/2910520 and choose between one or a combination of the provided solutions:
JobScheduler (API 21 onwards)
GcmNetworkManager (for this to work users need Google Play Services installed)
Evernote has released a library which already switch to the best implementation available for the device, i would suggest you to use this without doing everything from scratch:
https://github.com/evernote/android-job

Android Auto app never calls onGetRoot

I'm developing an audio streaming application for Android and integrating Android Auto. I've been following these two tutorials.
Android Developer Training
PTR Android Blog
Using the Desktop Head Unit, I'm able to select my media app from the media app list, but from there a ProgressBar stays instead of giving way to the "To play something, open the menu at the top left." message seen in the Universal Music Player.
On inspection, it seems that the MediaBrowserServiceCompat's onGetRoot()is never invoked and thus never populating my MediaItemCompat into the Auto app's list.
My manifest contains the following.
<manifest package="com.app.audio"
xmlns:android="http://schemas.android.com/apk/res/android">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.MEDIA_CONTENT_CONTROL"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<application
android:name="com.app.audio.AudioApp"
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme">
<activity
android:name="com.app.audio.presentation.home.HomeActivity"
android:label="#string/app_name"
android:launchMode="singleTop">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity
android:name="com.app.audio.presentation.weather.WeatherActivity"
android:screenOrientation="userPortrait"/>
<activity android:name="com.app.audio.presentation.settings.SettingsActivity"/>
<activity android:name="com.app.audio.presentation.alarm.AlarmActivity"/>
<activity android:name="com.app.audio.presentation.sleep.SleepActivity"/>
<receiver android:name="com.app.audio.audio.AudioIntentReceiver">
<intent-filter>
<action android:name="android.intent.action.MEDIA_BUTTON"/>
<action android:name="android.media.AUDIO_BECOMING_NOISY"/>
</intent-filter>
</receiver>
<receiver android:name="com.app.audio.presentation.alarm.AlarmReceiver"></receiver>
<receiver android:name="com.app.audio.presentation.sleep.SleepReceiver"></receiver>
<service
android:name="com.app.audio.data.service.media.MediaService"
android:exported="true">
<intent-filter>
<action android:name="android.media.browse.MediaBrowserService"/>
</intent-filter>
</service>
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version"/>
<meta-data
android:name="com.google.android.gms.car.application"
android:resource="#xml/automotive_app_desc"/>
<meta-data
android:name="com.google.android.gms.car.notification.SmallIcon"
android:resource="#drawable/ic_launcher"/>
</application>
My automotive_app_desc.xml is very simple, only declaring Media.
<?xml version="1.0" encoding="utf-8"?>
<automotiveApp>
<uses name="media"/>
</automotiveApp>
My MediaService extends MediaBrowserServiceCompat. In the onCreate() I create and set my MediaSessionCompat.
#Override
public void onCreate() {
super.onCreate();
//...
mediaSession = new MediaSessionCompat(
this,
SESSION_TAG,
mediaIntentReceiver,
null
);
mediaSession.setFlags(
MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS |
MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
mediaSession.setCallback(new MediaSessionCompat.Callback() {
#Override
public void onPlay() {
super.onPlay();
play(selectedStream);
}
#Override
public void onPause() {
super.onPause();
pause();
}
#Override
public void onStop() {
super.onStop();
stop();
}
#Override
public void onSkipToNext() {
super.onSkipToNext();
playNextStation();
}
#Override
public void onSkipToPrevious() {
super.onSkipToPrevious();
playPreviousStation();
}
});
mediaSession.setActive(true);
setSessionToken(mediaSession.getSessionToken());
updatePlaybackState(ACTION_STOP);
}
Finally, the two overridden methods from MediaBrowserServiceCompat, of which neither is ever called.
#Nullable
#Override
public BrowserRoot onGetRoot(#NonNull String clientPackageName, int clientUid, #Nullable Bundle rootHints) {
return new BrowserRoot(ROOT_ID, null);
}
#Override
public void onLoadChildren(#NonNull String parentId, #NonNull Result<List<MediaBrowserCompat.MediaItem>> result) {
List<MediaBrowserCompat.MediaItem> items = getMediaItemsById(parentId);
if (items != null) {
result.sendResult(items);
}
}
As far as I can tell, that's everything required to get an Android Auto started, yet when I open the app on my desktop head unit, there is only a ProgressBar greeting me, and when I open the off-screen nav drawer, there's another one. I haven't heard of that state in any material I've read. Is there something I missed?

Ultimately, the issue didn't have anything to do with what I described. The aforementioned MediaService also does other tasks that require a custom Binder. This custom Binder didn't call the onGetRoot() needed for the Head Unit. As a solution, I check the Intent action and return super.onBind() when it's from the MediaBrowserServiceCompat.
#Override
public IBinder onBind(Intent intent) {
if (SERVICE_INTERFACE.equals(intent.getAction())) {
return super.onBind(intent);
}
return new MediaBinder();
}
The SERVICE_INTERFACE is a constant in MediaBrowserServiceCompat.

I'm developing an Android auto but I have some problems in this part of my code, in Onbind method of the service:
public IBinder onBind(Intent arg0) {
Log.i("TAG", "OnBind");
// TODO Auto-generated method stub
if (SERVICE_INTERFACE.equals(arg0.getAction())) {
Log.i("TAG", "SERVICE_INTERFACE");
registerReceiver(receiver, filter);
return super.onBind(arg0);
} else {
Log.i("Musica Service", "musicBind");
return musicBind;}
}
I have other activities bound with my service through a musicBind IBinder, but on the other hand I have set all things to connect my app in Android auto interface but after close my app after disconnect the device from the android auto I can't stop my mediabrowserservice compat. I think it's due to this SERVICE_INTERFACE keeps binded the service. How can I stop or destroy this from the same servicemediabrowserservicecompat?