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android-firebase childEventListener in service
(2 answers)
Android: Firebase realtime database updated when app destroyed
(1 answer)
Closed 10 months ago.
My Arduino-Uno(this chip is not related to this question) sends either one of two values to firebase, 1 or 0, I want it so that every time the value in the database is updated, it gets detected in android studio and it checks if the value updated is one
I don't particularly require a block of code, I just need to know the concept of this part. I want my app to check for the value even if the app is closed, for which which I did find something on stack overflow.
I want my app to check for the value even if the app is closed
That does not seem hard. You can use a Service class and then do the event listener task there. Since you haven't asked for any code, I won't share it.
This is a good post on it
Related
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How to detect walking with Android accelerometer
(5 answers)
Closed 6 years ago.
I am trying to figure out which google API can be used in order to detect whether the user is walking or just standing. Is there any API that requires only sensor values and not GPS?
I'd use step counter if available and fused location otherwise.
Step counter is lightest to use and consume less battery in comparison to fused location.
Even more, step counter allows indoor discovering.
Fused location might be not enough inside buildings and you'd probably have to use another solution like beacons. It gets more complicated here.
You must use FusedLocationProviderApi in Android to get location of device and then fetch speed on the Location object.
If the speed is greater than 0, then you can say user is moving. The speed is in meter/second.
Refer Android Documentation to understand code : https://developers.google.com/android/reference/com/google/android/gms/location/FusedLocationProviderApi
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How to step back in Eclipse debugger?
(6 answers)
Closed 6 years ago.
I have the following doubt about the Eclipse debugger dbugging a Java application.
When it stop on a break point I know that I can go to the next step. But can I also go to the previous one?
The best compromise is "Drop to Frame" (one of the icons in the debugging area), which essentially resets the stack frame and puts you at the top of the method. This won't reset any external side effects, so if some code between the top of the method and your current position changed any properties of an object, you'll have to deal with that.
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Closing Streams in Java
(6 answers)
Closed 6 years ago.
With huge advancements in CUPs able to process mass amounts of information in fractions of seconds, why is it important that I close a file stream?
Remember that not all devices are the same, platforms like mobile(smartphones and tablets) need to be as efficient as possible. Or if the application has a big user base, maybe when 400 people are logged in there wont be that many problems, but what happens when it goes to ~40k? You have to make your code as versatile as possible, always think about scalability.
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Not getting correct value when retrieving current outgoing phone number in android
(1 answer)
Closed 9 years ago.
I am trying to get outgoing call number with intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER), but every time I try it returns null. I did put needed permissions and action in Androidmanifest. Can someone tell me what I am doing wrong or how to retrive number another way?
Ok, I found out what was wrong.
First of all intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER) gives you outgoing number while phone state is idle and turns to "null" while phone status changes to OFF_HOOK.
The easiest way was to save the number before another onRecive happens.
This question already has an answer here:
Closed 10 years ago.
Possible Duplicate:
Android: Redirect outgoing calls
The requirement is to replace newly dialed number with another one. I have captured the ACTION_NEW_OUTGOING_CALL event and used Intent.EXTRA_PHONE_NUMBER to get the current outgoing number and then I have used setResultData inside my class(which extends BroadcastReceiver) to replace the dialed number. Basically code is,
if (Intent.ACTION_NEW_OUTGOING_CALL.equals(action)) {
String phonenbr =
intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
Log.d("OutGoingNum", "phonenbr is " + phonenbr);
if (phonenbr.startsWith("00")) {
setResultData("12345678");
}
}
My code works fine in Android emulator but on the device the code works only on Redial. It doesnt work when you dial the number via dialpad. Please help.
I am guessing that Android won't allow the interception and replacement of a dialed number. It would be far too easy for someone to abuse this.