Questions tagged as 'android'

Tagged questions
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Open PDF stored in external directory from android studio

Through JSON I get some PDFs that I found on base 64 and I keep them in the following way: OutputStream out = new FileOutputStream(Environment.getExternalStorageDirectory().toString() + "/documentosConsumerTemporal/pdfConsumer_" + oNombreDocum...
asked by 11.08.2017 / 18:17
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Android Studio Surface View with buttons

I have a sprite that moves when the Boolean is true and stops when it is false. This I want to activate with a button that I have in the Main activity. The problem is that when I press it the application stops. What am I doing wrong? What wou...
asked by 19.07.2017 / 03:40
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Is there a Play Store Intent that is launched when an app is installed?

I want to know if there is any Intent that Play Store click every time an application is installed correctly, I have seen that there is a call INSTALL_REFER but this is for campaigns and analytics, basically what I'm looking for is to...
asked by 22.07.2017 / 07:24
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Update "compile" in Android Studio

I'm starting with the creation of android applications, I had previously entered a course where we made applications for android, try to open one of the exercises to practice more but when I opened it I found errors of Gradle , this compil...
asked by 31.07.2017 / 04:59
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Error React native - React Navigation

I have this problem when I want to install React Navigation on Windows with npm Then when I import the component import {StackNavigator} from 'react-navigator' When emulating in android I get the following error     
asked by 30.07.2017 / 02:17
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How to get an item from an ArrayList?

The problem I have is trying to recover a item of a ArrayList that I filled with data from Mysql , because when I try to get it with the get() it tells me the following:    java.lang.NullPointerException: Attempt to invo...
asked by 06.03.2018 / 00:09
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Check Sqlite column and modify the data

I have a Sqlite : public class SqliteDatabase extends SQLiteOpenHelper { private static final int DATABASE_VERSION = 1; private static final String DATABASE_NAME = "DB_NOTAS"; private static final String TABLE_NOTAS = "NOTAS...
asked by 29.06.2017 / 21:04
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Obtain the time and minute values of a TimePickerDialog for use in another method

I have a button that when pressed it executes this method: private void mostrarHora(final TextView t) { final TimePickerDialog timePickerDialog = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {...
asked by 05.03.2018 / 04:07
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Problem when loading audio with Android Studio

I'm doing a metronome and the problem I have is the following. I was using a 1 second sound file to make the metronome sound. The problem comes when the rhythm of the metronome exceeds 60 beats per second, because being the audio of 1 second can...
asked by 01.07.2017 / 20:15
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How to read mp3 files from memory?

How do I read the mp3 files in the memory? will play the files in the raw folder, but I do not know how to read the ones that the user has on his android ... I have created these variables Context context = this; ListView lista;...
asked by 23.06.2017 / 07:35