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How to get pid of android application without using adb shell?
(2 answers)
Closed 6 years ago.
Is there a way within a java app that's running under Android to determine that app's process ID ("PID")?
The reason I want this is that I am writing an app which reads and processes lines from logcat, and I want to be able to ignore all logcat lines that have been written by this app, itself.
I know I can do this by using a unique tag for my app in all the Log.*() calls and then ignoring logcat lines with this tag, but it seems to me that it would be cleaner if I could simply ignore all logcat lines which have been written by my own app's PID.
I've searched, but I couldn't find anything which explains how to determine the PID of a running Android app, from within that app, itself.
Thanks in advance for any suggestions or pointers to docs.
You're looking for this, I think:
int id = android.os.Process.myPid();
Related
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Android Studio shows wrong file contents
(10 answers)
Closed 1 year ago.
I am working on a project from last 1 month. One day I wrote the code and closed the android studio. After that when I opened it some code was automatically changed and doesn't maked any sense. Like before, a java code of my activity was looking like this-
but now it is looking like this-
Why did this happened. I was working on this project from very long but many of my hard work is ruined. The code automatically changed to something like null null null... as in the screen shot. this only happened to some of my java activity's. Please if anyone know why this happened and how to fix it please tell me.
check in local history, you will be able to get the recent changes there.
adding steps-
right click on file in which you are facing issue.
click on "local history", it will give option to show history.
attaching screenshot for better understanding.
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How to get a list of current open windows/process with Java?
(14 answers)
Closed 6 years ago.
I am currently writing a Java Application, that needs to filter the name of the Program whichs UI is front. Sorry for my bad english.
So let's say the Java App is running in Background and I open Windows -> Games -> Minesweeper then i want the App to only tell me "Active: Minesweeper". Without any additional information. Just the name "Minesweeper"
I already tried using JavaNativeAccess but I'm still unfamiliar with it.
Thanks you all in advance
You might want to look at the following link which might be of help:
How to get a list of current open windows/process with Java?
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Is it possible to run C source code from Java?
(4 answers)
Closed 7 years ago.
I want to make a Java app that uses the Razer Chroma SDK, but the Chroma SDK is in c++
Is there a way I can run c++ code from Java?
I must use Java for what I want to make.
I have almost no experience in c++, but I understand enough to get doing what I need.
EDIT:
This question is slightly different then others, because it is about a specific SDK, not about general c++ libraries. For this library I was able to use a simpler approach then learning to use things like JNI
You probably want to look into using JNI
The easiest way I found, and then one that doesn't require learning stuff like JNI:
Create a console application with commands that fire off what you need
In Java, launch the console application and redirect it's input and output streams so you can send it commands, and log it's output (see 12013910)
Have a command in the console application that you can pass a PID, and have the console application watch for when it closes, and then it will close itself. (This fixes having the console application not being closed if the Java application crashes and doesn't call the closing method(s))
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How to detect if a graphical interface is supported?
(5 answers)
Closed 8 years ago.
Update: as marked duplicate, I just want to mention, this seems like a duplicate, but the answer to the other mentioned question is not completely correct. Instead refer to the accepted answer below.
isHeadless would return unexpected true in certain cases.
Its a bit weird situation, but recently I build a very simple java application which can be run in console/terminal mode or in JavaFX UI mode.
However, then while using it on a remote computer which doesn't have any display attached. I got an error that this JavaFX UI application can't be initiated on systems without display, which is pretty obvious.
To overcome this problem, I have been looking for a robust way of detecting if the system has any display attached and it can initiate a JavaFX application, which has to be a platform independent solution, since it could be Windows or Ubuntu/Linux or Mac system.
Structure of the application:
A Main console app, which depending on input arguments executes internally a console app or UI app.
So that, if any arguments given, run in console mode or if no arguments then run in UI mode.
This is where I want to detect if there is a display available from within my main console app, which then won't even try to run the UI app if display is missing.
Any idea how can we achieve this or suggestion in a proper direction would be great.
I think you could use java.awt.GraphicsEnvironment
GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices();
which will return an array with all the available screens. If this array is empty, there is no monitor.
Edit: About using isHeadless(), you can look at How to determine if GraphicsEnvironment exists
This question already has an answer here:
Closed 10 years ago.
Possible Duplicate:
J2me detecting first start of application
I'm developing a J2ME application and I want to know if it is the first time to run the application in the device to be able to show welcome message to user and else the user will be taken to the main screen directly
How to make so?
A simple solution...
When the user clicks the button to close the welcome message, write out a file to disk. When you start the application the next time, check to see if the file exists - if it does, the user has already seen the welcome screen. If the file doesn't exist, the welcome screen hasn't been shown (ie first run of the application)
Rather than asking a question like this, you should post some ideas, or some code, to show us that you've at least tried to do this yourself first.
When you first run an app, you can display the welcome message & then create any normal file like any .txt. Make your code such that # startup each time it will see if that file is present or not. If present, go to main screen n if not, show welcome message & create the file.
Edit:
Agreed with Doctoror Drive. Much richer way of storing data is with Record Store. Check this.