i'm watching a tutorial about developing a chat Application in android and i have faced a problem in importing a class called 'MessagingService.java',
this class developed by google Inc, i searched many times and i couldn't find it.
You need to get the project source from git.
Read the section titled Import Samples from GitHub. That will tell you how to get a local copy of a sample project into Android Studio that you can play around with.
There is also a download link in the upper right hand corner of the page you referenced that will download the project to your machine.
Related
I have a problem running my project on Android Studio. I am working on an Android project that has a native Java library inside it. It was running fine all the time. But suddenly when I open Android Studio, I find this error:
There is also an error in the .gradle of the project:
It says that URI is not registered.
When Android Studio is started, I find this message:
It seems that there is something wrong in Java configuration, but I can't find out what is the problem?
It was running fine all the time
Not on Android, it wasn't.
It seems that there is something wrong in Java configuration
No. You are using classes that are not part of the Android SDK.
The java Swing and AWT API are not part of the Android SDK and thus aren't including with it. You must find an Android equivalent image library to use in your app. There are few good ones around just depends on what functionality you need to have available to you in you app. Try searching Picasso and or Volley. Picasso is very popular and well known. it has a lot of feature including networking functionality for loading images from the web. The Volley library isn't an image library but an networking library that contains some predefined classes for loading images over the internet.
So this just happened to me. I'm not 100% on the details of how I got it working again, but its roughly this (on my Mac):
Quit Android Studio
I went to ~/Library/Application%20Support/ and deleted the AndroidStudio3.2 directory
I relaunched Android Studio and I got some warning dialog about plugins not existing.
Chose the button that is something about reinstalling or fixing (or whatever isn't deleting or ignoring)
Another dialog comes up. There are a bunch of plugins that are in red. Deselect all the red ones. Then reselect all those ones that were previously red.
Android Studio asks you something and if you want to restart Android Studio. Pick the thing that includes restarting.
And once Android Studio restarts, chose to rebuild your project, and then it worked.
Good Luck and I hope this works for you too.
I am new to android and java development although I am an expert with IPTV and I have made the biggest Greek and Cyprus IPTV but since there is a lack of Greek IPTV android apps I decided to make one application.I found IPTVCore on playstore which is made by the developer of the IPTV app.In the description it has a link on an app that uses iptv core github
I downloaded the zip changed the icons and renamed the files. In MainActivity.java I removed the first comments and added my playlist url and changed package name.
I have android studio and eclipse with android addons.
How to make it an apk?
If you mean to simply be able to load it onto a devices to test then both Eclipse and Studio will allow you do this when you elect 'Run' and have a device attached via the USB (with USB debugging enabled). This will actually install the apk on your device so you can test it.
If you mean actually making the apk available for others (via the play store for example) then you should look and the Android publishing documentation:
http://developer.android.com/tools/publishing/publishing_overview.html
In very broad terms, you develop the app, build it, test it etc and then when it is ready for release you build it for release (remove all debug code, test data etc), sign the app, and release it via a marketplace like Play Store, or avi email or your own web site.
One important thing to remember is to version the app properly - the is important for all the obvious reasons (users or support wanting to know the version) but also because the marketplace update mechanisms may use it to check what versions can be updated etc.
Update - answering the question in the comment below:
There are two approaches suggested in the Readme file with the project:
To build you custom IPTV app you can do one of the following:
Clone iptv.example project, change app name, launcher icon, and
package name.
Blockquote
Create new Android project with empty activity and use
the code from MainActivity.java
The second one might actually be simpler for you if you know how to create a simple Android project - just do that and then replace the MainActivity code in the newly created project with the code in the MainActivity file (the only java source file) in the githib project you have downloaded.
I am trying to get time from an Internet Time Server. And I found that android.net.SntpClient is a good solution that I could use.
But my Android SDK (Android API 19) does not contain that class. I downloaded the "Sources for Android SDK" via SDK Manager and the source code contains the SntpClient.java (source file for class android.net.SntpClient)
Please view the images links I uploaded. (sorry, I dont have enough reputation for images right here)
The android SDK:
https://scontent-a-sea.xx.fbcdn.net/hphotos-xpa1/v/t1.0-9/s720x720/1888504_897281990284152_2310291065247680835_n.jpg?oh=989c5f49848a8914d77bb0d4aac8897d&oe=54F8E9D6
The sources:
https://scontent-a-sea.xx.fbcdn.net/hphotos-xpa1/v/t1.0-9/s720x720/10659310_897281993617485_1823842706987095742_n.jpg?oh=27ee6a075967731dc7265352c22002cd&oe=54DCBB73
Could anyone tell me why this file is not compiled? If I want to use this class, I have to explain to my boss why android SDK doesn't contain it.
Thanks a lot
Google has chosen not to make all public classes available as part of the SDK. Visibility is controlled by the #hide comment tag as described here.
I'm not sure why they chose to hide SntpClient particularly, but provided you respect the terms of the Apache license you can copy the source into your application without much modification.
Where does the OS saves the screenshots it takes of the recent apps? I have searched for the finding the directory location but couldn't find any info. I have also looked through Android source code and found that Google is calling toggleRecentApps() using handler but couldn't reverse engineer the code further.
Does anybody knows the location/directory of the screenshots of Recent apps?
Regards
I am really sorry to ask such a bland and stupid question, but I am having the greatest of frustrations with trying to load the Google Maps project library into my project resources.
I have downloaded all the tools and necessities needed from the SDK to get Google Maps.
However, whenever I try to load the Google Maps library, I get 2 errors.
The first is that for some reason,
the Class known as FragmentActivity is missing. I have no idea what
it is or where to find it to get things going with an Android project.
The second distinct problem is that the console shoots off the following message:
"google_maps] Unable to resolve target 'android-16'"
Although I have a fairly strong idea of what this means, I don't quite know how to troubleshoot so that the library is built towards the desired API level.
I do apologize as I am new to Android and absolutely love the platform, but this one really has me dumbfounded. Any and all information and suggestions is always most appreciated.
Thanks and once again, sorry for asking something so silly.
Well for the first question:
FragmentActivity is part of the google-support-v4 library and designed for application that are developed to SDK < 11 for supporting fragments. So you didn't added the referencing of this library to you project.
you can get a better idea of the imports you need to make and how to make them by reading this
blog post I wrote on Google Map API V2:
Google Map API V2 guide
about your second question, you probably trying to run this project against an API level you didn't downloaded from the SDK Manager, you have two options:
downloaded the needed API package from the SDK Manager.
right click on your project -> Properties -> Android -> change the project build target to a target that you have its API level downloaded.
Try this answer, Generate Google Map key for android - step by step.
Or take a look to this very helpful step by step tutorial. I struggle for 3 days with the maps stuff, but that tutorial showed me the light.