Questions tagged as 'android-studio'

Tagged questions
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Problem sending SMS message - Android Studio

I need help in a code that I am elaborating, it consists of sending the coordinates by a text message and entering the phone number in an editText, I am a beginner for android studio, the problem is that when I enter the phone in the text and I...
asked by 25.10.2018 / 02:04
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error: can not find symbol method getDownloadUrl ()

Hello I can not find out what the problem is with this error, this is the code snippet that I use: if (task.isSuccessful()) { FriendlyMessage friendlyMessage = new FriendlyMessage(null,...
asked by 08.10.2018 / 15:36
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Error when using length on Android

I'm using length in the grantResult in a conditional, but I'm booting error.     
asked by 10.10.2018 / 21:49
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Doubt about the android studio contact permissions

in my application I am opening an intent to add a new contact this is the code ... Intent intent = new Intent(Intent.ACTION_INSERT); intent.setType(ContactsContract.Contacts.CONTENT_TYPE); intent.putExtra(ContactsContract.Intents....
asked by 16.10.2018 / 18:30
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Problem when starting Android simulator with native react

3 days ago I have the same problem, I install a new application react native:    react-native init project Then in the android studio I start the AVD, I set up a mobile, I start it and I raise the project    react-native run-android...
asked by 05.10.2018 / 12:28
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Record time in android studio

I'm doing a Qr scanner application, I already have the scanner encoded, what I want to do is scan a code, register the current time automatically in which the scanner was made, use sq lite to record data, If someone could help me, I would apprec...
asked by 05.10.2018 / 08:43
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how to show saved data in Firebase database with android studio

Friends I'm doing a project in Firebase database with android and I need to consult and get the last three values saved with the name of "dose" this is the structure in Firebase This is my user.java class public class usuario { private S...
asked by 05.10.2018 / 01:20
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How to create a Bluetooth Service on android?

I am making an application that searches and connects to bluetooth devices My problem is that when I change Activity and return to close the connection my BluetoothSocket returns to NULL and when I call the method for close()...
asked by 08.10.2018 / 23:54
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Images, Buttons, Sounds and Share on Android

Hello, how are you? I tell you I'm a Java student (I'm just starting) and I wanted to try doing an application on Android by following some YouTube tutorials, I managed to do it and now I want to improve it, I find some problems that I'll detail...
asked by 03.10.2018 / 00:02
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setResult () and finish () From RecyclerView Adapter

I make a startActivityForResult () from an activity, and I need that from the activity that the user sent to click on one of the cards that I have in a RecyclerView and once clicked it has to return the value to the previous activity, the proble...
asked by 02.10.2018 / 17:41