I am using a Service for performing some task, which should run only if the app is in background, moreover the service runs for sometime and after sometime, it gets destroyed. Earlier this was working completely fine, but don't know where i am doing wrong.
Here is the code of my Service:
public class MyService extends Service {
Context context;
public static final String TAG = MyService.class.getSimpleName();
public MyService(Context applicationContext) {
super();
context = applicationContext;
Log.i("myservice", "here service created!");
}
public MyService() {
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d(TAG, "[onCreateService]");
super.onStartCommand(intent, flags, startId);
// Code
registerOverlayReceiver();
context = this;
return START_STICKY;
}
#Override
public void onDestroy() {
super.onDestroy();
unregisterOverlayReceiver();
Log.i("EXIT", "ondestroy!");
}
#Override
public void onTaskRemoved(Intent rootIntent) {
super.onTaskRemoved(rootIntent);
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
private void unregisterOverlayReceiver() {
if (myReceiver != null) {
unregisterReceiver(myReceiver);
}
}
private static final String ACTION_DEBUG = "abc.action.DEBUG";
private void registerOverlayReceiver() {
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_SCREEN_ON);
filter.addAction(ACTION_DEBUG);
registerReceiver(myReceiver, filter);
}
private BroadcastReceiver myReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
Log.d(TAG, "[onReceive]" + action);
if (action.equals(Intent.ACTION_SCREEN_ON)) {
showMyActivity();
} else if (action.equals(ACTION_DEBUG)) {
showMyActivity();
}
}
};
private void showMyActivity() {
Intent intent = new Intent();
intent.setClass(this, MyActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
}
I have debugged but couldn't find out the problem for the same.
Anybody who came across anything like this can help me out.
Related
I want to convert Java code to C# but facing problem to do so
public class MyService extends Service {
static final String CONNECTIVITY_CHANGE_ACTION = "android.net.conn.CONNECTIVITY_CHANGE";
NotificationManager manager ;
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
// Let it continue running until it is stopped.
Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
IntentFilter filter = new IntentFilter();
filter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
BroadcastReceiver receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (CONNECTIVITY_CHANGE_ACTION.equals(action)) {
//check internet connection
if (!ConnectionHelper.isConnectedOrConnecting(context)) {
if (context != null) {
boolean show = false;
if (ConnectionHelper.lastNoConnectionTs == -1) {//first time
show = true;
ConnectionHelper.lastNoConnectionTs = System.currentTimeMillis();
} else {
if (System.currentTimeMillis() - ConnectionHelper.lastNoConnectionTs > 1000) {
show = true;
ConnectionHelper.lastNoConnectionTs = System.currentTimeMillis();
}
}
if (show && ConnectionHelper.isOnline) {
ConnectionHelper.isOnline = false;
Log.i("NETWORK123","Connection lost");
//manager.cancelAll();
}
}
} else {
Log.i("NETWORK123","Connected");
showNotifications("APP" , "It is working");
// Perform your actions here
ConnectionHelper.isOnline = true;
}
}
}
};
registerReceiver(receiver,filter);
return START_STICKY;
}
#Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show();
}
}
This part I am not getting which coming in middle of code
BroadcastReceiver receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent)
{
}
};
You probably want to see a more comprehensive answer for this to see how the given suggestions all fits together:
public class MyService : Service
{
internal const string CONNECTIVITY_CHANGE_ACTION = "android.net.conn.CONNECTIVITY_CHANGE";
internal NotificationManager manager;
public override IBinder onBind(Intent intent)
{
return null;
}
public override int onStartCommand(Intent intent, int flags, int startId)
{
// Let it continue running until it is stopped.
Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show();
IntentFilter filter = new IntentFilter();
filter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
BroadcastReceiver receiver = new BroadcastReceiverAnonymousInnerClass();
registerReceiver(receiver,filter);
return START_STICKY;
}
private class BroadcastReceiverAnonymousInnerClass : BroadcastReceiver
{
public override void onReceive(Context context, Intent intent)
{
string action = intent.Action;
if (CONNECTIVITY_CHANGE_ACTION.Equals(action))
{
//check internet connection
if (!ConnectionHelper.isConnectedOrConnecting(context))
{
if (context != null)
{
bool show = false;
if (ConnectionHelper.lastNoConnectionTs == -1)
{ //first time
show = true;
ConnectionHelper.lastNoConnectionTs = DateTimeHelper.CurrentUnixTimeMillis();
}
else
{
if (DateTimeHelper.CurrentUnixTimeMillis() - ConnectionHelper.lastNoConnectionTs > 1000)
{
show = true;
ConnectionHelper.lastNoConnectionTs = DateTimeHelper.CurrentUnixTimeMillis();
}
}
if (show && ConnectionHelper.isOnline)
{
ConnectionHelper.isOnline = false;
Log.i("NETWORK123","Connection lost");
//manager.cancelAll();
}
}
}
else
{
Log.i("NETWORK123","Connected");
showNotifications("APP", "It is working");
// Perform your actions here
ConnectionHelper.isOnline = true;
}
}
}
}
public override void onDestroy()
{
base.onDestroy();
Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show();
}
}
internal static class DateTimeHelper
{
private static readonly System.DateTime Jan1st1970 = new System.DateTime(1970, 1, 1, 0, 0, 0, System.DateTimeKind.Utc);
public static long CurrentUnixTimeMillis()
{
return (long)(System.DateTime.UtcNow - Jan1st1970).TotalMilliseconds;
}
}
I think you would do something like this
var receiver = new MyReceiver();
public class MyReceiver : BroadcastReceiver
{
public override void onReceive(Context context, Intent intent)
{
}
}
Since C# does not allow anonymous classes you will have to explicitly create it and then pass the data that you need there from this class.
[BroadcastReceiver(Enabled = true, Exported = false)]
public class SampleReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
// Do stuff here.
}
}
Then use it like:
var receiver = new SampleReceiver();
I am having an activity and on Launching the activity through Intent from one of my service, onCreate(), onPause() and onResume() is called.
I am not very sure where i am doing wrong, i have removed all the code, just the basic function codes are available, and also i have removed all the codes which were opening that particular activity, still the behaviour is same.
I am including the simplest code i am using
ActivityClass.java
public class ActivityClass extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
System.out.println("TEST : onCreate");
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_lockscreen);
ButterKnife.bind(this);
}
#Override
protected void onPause() {
System.out.println("TEST : onPause");
super.onPause();
}
#Override
protected void onDestroy() {
System.out.println("TEST : onDestroy");
super.onDestroy();
}
}
Service class
public class OverlayService extends Service {
Context context;
public static final String TAG = OverlayService.class.getSimpleName();
public OverlayService(Context applicationContext) {
super();
context = applicationContext;
}
public OverlayService() {
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d(TAG, "[onCreateService]");
super.onStartCommand(intent, flags, startId);
KeyguardManager myKM = (KeyguardManager) getApplicationContext().getSystemService(Context.KEYGUARD_SERVICE);
if(myKM.inKeyguardRestrictedInputMode()) {
//it is locked
showOverlayActivity();
} else {
//it is not locked
}
registerOverlayReceiver();
context = this;
return START_STICKY;
}
#Override
public void onDestroy() {
super.onDestroy();
unregisterOverlayReceiver();
Log.i("EXIT", "ondestroy!");
}
#Override
public void onTaskRemoved(Intent rootIntent) {
super.onTaskRemoved(rootIntent);
Intent broadcastIntent = new Intent("ac.in.ActivityRecognition.RestartSensor");
sendBroadcast(broadcastIntent);
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
private void unregisterOverlayReceiver() {
if (overlayReceiver != null) {
unregisterReceiver(overlayReceiver);
}
}
private static final String ACTION_DEBUG = "kunal.lockoverlay.action.DEBUG";
private void registerOverlayReceiver() {
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_SCREEN_ON);
filter.addAction(ACTION_DEBUG);
registerReceiver(overlayReceiver, filter);
}
private BroadcastReceiver overlayReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
Log.d(TAG, "[onReceive]" + action);
if (action.equals(Intent.ACTION_SCREEN_ON)) {
// ACTON_SCREEN_ON
showOverlayActivity();
} else if (action.equals(ACTION_DEBUG)) {
showOverlayActivity();
}
}
};
private void showOverlayActivity() {
Intent intent = new Intent();
intent.setClass(this, ActivityClass.class);
intent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
}
Can someone point some of the possible reasons for this behaviour or could identify where i am doing wrong?
Well everything will be called regardless, you have defined it in your ClassName.java file.
You override the method and define it in your class to perform certain action/function when that is called.
For eg.,
You could use onResume to clear an arraylist and add updated elements to arraylist (OR) dismiss all notifications from your app on moving to that activity, say
#Override
public void onResume() {
super.onResume();
calendarList.clear();
//dismiss all notifications here
NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
if (notificationManager!=null)
notificationManager.cancelAll();
}
OR eg., onDestroy to destroy the bluetooth service,
#Override
public void onDestroy() {
super.onDestroy();
if (mBluetoothService != null) {
mBluetoothService.stop();
}
}
Hope that clarifies. Happy coding!
About service class, you should call registerReceiver() or initialize variables in onCreate instead of onStartCommand because onCreate is only called once at the first time of starting service and onStartCommand will be called every time you want to trigger an action to the service by calling startService(Intent).
I use activity recognition api and activity transitions. When I first run the app, the first transition is always the. In this app it's WALKING-ENTER. When I tried with only IN_VEHICLE-ENTER and IN_VEHICLE-EXIT in transitions, it was IN_VEHICLE-ENTER. I thought about ignoring the first transition but a device I've tested on didn't have such a problem. The devices that had these problem were Android 8.1, and the device didn't have the problem was 6.0.
MainActivity extends AppCompatActivity
private static Intent serviceIntent;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int PERMISSION_ALL = 1;
String[] PERMISSIONS = {Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION};
if(!hasPermissions(this, PERMISSIONS)){
ActivityCompat.requestPermissions(this, PERMISSIONS, PERMISSION_ALL);
}
Button button = findViewById(R.id.button);
button.setOnClickListener(
new View.OnClickListener() {
public void onClick(View view) {
serviceIntent = new Intent(MainActivity.this, ServiceS.class);
MainActivity.this.startService(serviceIntent);
}
});
}
public static boolean hasPermissions(Context context, String... permissions) {
if (permissions != null) {
for (String permission : permissions) {
if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
}
return true;
}
ServiceS extends Service
public ServiceS() {
super();
}
public static void locationArrived(Context context, Location location) {
Log.d("hmm: ", location.toString());
}
#SuppressLint("MissingPermission")
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
return super.onStartCommand(intent, flags, startId);
}
#Override
public void onCreate() {
initActivityTransition();
super.onCreate();
}
#Override
public void onDestroy() {
Log.d("hmm: ", "Updates stopped!");
Task task = ActivityRecognition.getClient(this)
.removeActivityTransitionUpdates(activityPendingIntent);
super.onDestroy();
}
// ACTIVITY TRANSITION BLOCK START
private static List<ActivityTransition> transitions = new ArrayList<>();
private static PendingIntent activityPendingIntent;
private static ActivityTransitionRequest transitionRequest;
void initActivityTransition(){
transitions.add(
new ActivityTransition.Builder()
.setActivityType(DetectedActivity.IN_VEHICLE)
.setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_EXIT)
.build());
transitions.add(
new ActivityTransition.Builder()
.setActivityType(DetectedActivity.IN_VEHICLE)
.setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_ENTER)
.build());
transitions.add(
new ActivityTransition.Builder()
.setActivityType(DetectedActivity.WALKING)
.setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_EXIT)
.build());
transitions.add(
new ActivityTransition.Builder()
.setActivityType(DetectedActivity.WALKING)
.setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_ENTER)
.build());
transitions.add(
new ActivityTransition.Builder()
.setActivityType(DetectedActivity.STILL)
.setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_ENTER)
.build());
transitions.add(
new ActivityTransition.Builder()
.setActivityType(DetectedActivity.STILL)
.setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_EXIT)
.build());
Intent activityIntentService = new Intent(this, TransitionReceiver.class);
activityPendingIntent = PendingIntent.getBroadcast(this, 1, activityIntentService, PendingIntent.FLAG_UPDATE_CURRENT);
Log.d("hmm: ","DriveBuddyService - initActivityTransition");
}
static void transitionArrived(final ActivityTransitionEvent event, final Context context){
Log.d("hmm: ", event.toString());
Toast.makeText(context, event.getActivityType() + "-" + event.getTransitionType(), Toast.LENGTH_LONG).show();
}
#Override
public void onStart(Intent intent, int startId) {
if(transitionRequest==null) {
transitionRequest = new ActivityTransitionRequest(transitions);
}
Task task = ActivityRecognition.getClient(this)
.requestActivityTransitionUpdates(transitionRequest, activityPendingIntent);
super.onStart(intent, startId);
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
TransitionReceiver extends BroadcastReceiver.
public void onReceive(final Context context, Intent intent) {
Log.d("hmm: ","DriveBuddyTransitionReceiver - Enter");
if (ActivityTransitionResult.hasResult(intent)) {
ActivityTransitionResult result = ActivityTransitionResult.extractResult(intent);
for (ActivityTransitionEvent event : result.getTransitionEvents()) {
ServiceS.transitionArrived(event, context);
}
}
}
I observed the same thing too. It seems that the last activity is kept in cache or something like that. I saw this happening on Android 7.1 and Android 8.1.
To counter this I check the elapsed time of when the transition happened. I ignore the callback if the transition happened over 30 seconds ago.
This is what my code looks like:
#Override
public void onReceive(Context context, Intent i) {
if (ActivityTransitionResult.hasResult(i)) {
ActivityTransitionResult result = ActivityTransitionResult.extractResult(i);
for (ActivityTransitionEvent event : result.getTransitionEvents()) {
//continue only if the activity happened in the last 30 seconds
//for some reason callbacks are received for old activities when the receiver is registered
if(((SystemClock.elapsedRealtime()-(event.getElapsedRealTimeNanos()/1000000))/1000) <= 30) {
//activity transition is legit. Do stuff here..
}
}
}
}
I've typically seen callbacks arrive 0-10 seconds of them occurring.
I try to send data to server every 15 seconds so i used broadcast receiver and Android service but it did not work any more.I check Internet Connection Every 15 second and when connection is available it send data to server.
Test.java
public class Test extends AppCompatActivity {
private Context context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
this.context = this;
Intent alarm = new Intent(this.context, AlarmReceiver.class);
boolean alarmRunning = (PendingIntent.getBroadcast(this.context, 0, alarm, PendingIntent.FLAG_NO_CREATE) != null);
if(alarmRunning == false) {
PendingIntent pendingIntent = PendingIntent.getBroadcast(this.context, 0, alarm, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime(), 15000, pendingIntent);
}
}
AlarmReceiver.java
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Intent background = new Intent(context, BackgroundService.class);
context.startService(background);
}
}
BackgroundService.java
public class BackgroundService extends Service {
private boolean isRunning;
private Context context;
private Thread backgroundThread;
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
this.context = this;
this.isRunning = false;
this.backgroundThread = new Thread(myTask);
}
private Runnable myTask = new Runnable() {
public void run() {
// Do something here
internet();
System.out.println("call every 15 seconds");
Log.d("Background","Services run every 15 second");
stopSelf();
}
};
#Override
public void onDestroy() {
this.isRunning = false;
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (!this.isRunning) {
this.isRunning = true;
this.backgroundThread.start();
}
return START_STICKY;
}
private void internet() {
Helper hp = new Helper(context);
if (hp.isonline() == true) {
System.out.println("net connect");
} else {
System.out.println("net not available");
}
}
}
}
Manifest.xml
<service android:name=".service.BackgroundService" />
<receiver android:name=".service.AlarmReceiver"></receiver>
hole code return in logcat print message only one time, not every 15 seconds.
I have the following code being executed, I'm running this through a debugger and audioPlayerConnection.service is always null. Why may this be?
The various log calls don't always seem to be executed either (I guess this may have to do with the service being already starte).
Intent intent = new Intent(this, AudioPlayer.class);
AudioPlayerConnection audioPlayerConnection = new AudioPlayerConnection();
startService(intent);
bindService(intent, audioPlayerConnection, Context.BIND_AUTO_CREATE);
AudioPlayerConnection
public class AudioPlayerConnection implements ServiceConnection {
public IBinder service;
#Override
public void onServiceConnected(ComponentName name, IBinder service) {
this.service = service;
Log.d("hmm", "audio service connected!!!");
}
#Override
public void onServiceDisconnected(ComponentName name) {
}
}
AudioPlayer
public class AudioPlayer extends Service {
public ArrayList<MediaPlayer> audioResources = new ArrayList<MediaPlayer>();
public AudioPlayer() {
}
#Override
public int onStartCommand(Intent intent, int flags, int startId)
{
return START_STICKY;
}
#Override
public IBinder onBind(Intent intent) {
Log.d("hmm", "audio service binded!!!");
return new AudioPlayerBinder();
}
public class AudioPlayerBinder extends Binder {
public void stopAll()
{
int i = 0;
for (MediaPlayer mp : audioResources)
{
mp.stop();
mp.release();
audioResources.remove(i);
i++;
}
}
public void add(Integer resourceId, boolean loop)
{
MediaPlayer mp = MediaPlayer.create(null, resourceId);
if (loop)
{
mp.setLooping(true);
audioResources.add(mp);
}
mp.start();
}
}
}
You're declaring audioPlayerService in the local scope where you are calling bindService(). The call to bindService is asynchronous, and onServiceConnected() is not being called before you are (presumably) trying to use audioPlayerConnection as if the Service was already bound.