Questions tagged as 'android'

Tagged questions
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How to scan WiFi networks on Android

I am having a series of problems that I hope you can solve me. I am very new to Android and I am looking for valid examples to scan WiFi networks with my mobile. In all the examples that I have loaded, the same problem arises, never find any net...
asked by 24.07.2017 / 11:49
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I can not access the data folder of my app from the Andoid Device Monitor [duplicated]

I need to access the "data" folder from the Android Device Monitor, but it does not allow me to open it because I do not have permissions. I have opened the program as administrator and I have changed the android API for the 22 but still does...
asked by 17.08.2017 / 17:19
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Variable problem sharedpreferences

I'm doing an app where I try to create an event, save the date and time in a certain format and then retrieve them. Android Studio tells me    "can not find symbol" as it does not find the variables. I define the variables later, but beca...
asked by 11.07.2017 / 18:34
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Error generating APK Signed (ProGuard)

When generating the signed APK I get the following error in Messages and the APK does not generate me. But if it is not signed it works without problems : Error:Execution failed for task ':app:transformClassesAndResourcesWithProguardForDevR...
asked by 26.07.2017 / 00:18
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How to show a popup window above the call layout in Android 7.0 version

I am developing a kind of contact provider for Android users. The main function is that when the device receives a call (blocked or not blocked), a popup window with some information of the calling contact appears. The problem is that with versi...
asked by 10.07.2017 / 12:16
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I have a problem displaying a ListView in a Fragment

I have a problem trying to show listview in fragment . The listview appears in white, but when I put a break point everything goes perfect. This is the code of my fragment : public class ListRequestFragment extends F...
asked by 09.07.2017 / 08:05
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Upload image to servicor with web service made in php [closed]

I'm making an application for android, and in it I want the user that registers can upload images, when I create a web application in php, the upload of the images I do by placing the image in a folder and the name of the image in the database b...
asked by 16.08.2017 / 21:31
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launch activity from ImageButton

I have the following code: public void BotonAjustes() { View.OnClickListener listSet = new View.OnClickListener() { @Override public void onClick(View view) { Toast.makeText(getApplicationContext...
asked by 20.07.2017 / 17:15
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How to move to a fragment from an activity with android studio

I am developing my application and I arrived at a point where I need to open an activity that has tabs from another activity through a button. It would be something like this: I tried it through intent but I did not get anything,...
asked by 19.07.2017 / 23:26
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Notifications with firebase + php

Hello help what I want is the following I am trying to send a notification to users of an app I know that this is done by means of token but that is my concern I do not want to send them by token I want to send it to all users they have the app...
asked by 05.07.2017 / 21:44