Home > Android Runtime > Android Runtime Exec Background

Android Runtime Exec Background

Why does the javac process never complete?Why Runtime.exec() hangsThe JDK's Javadoc documentation provides the answer to this question:Because some native platforms only provide limited buffer size for standard input and output If i run Runtime.getRuntime().exec("ps ") in this very case a ndk-compiled mplayer port, after a random period of time, the command never returns. I am curerntly working with the ProcessBuilder to run a batch process for file conversion (50K records per batch) on a Windows XP machine. asked 5 years ago viewed 3630 times active 3 years ago Blog Stack Overflow Podcast #97 - Where did you get that hat?! his comment is here

For now, I don't have the time to change my program, your solutions works fine for now. More methods are missing in class SystemCommandExecutor : getStandardOutputFromCommand() getStandardInputFromCommand() Kind regards, Ulrich. Between different user accounts, which folders are "shared" and which are personal? in a shell. http://stackoverflow.com/questions/7331124/process-p-runtime-getruntime-exec-is-running-even-when-i-uninstall-the-app

I have one query,,,, Suppose i want to execute 'ls' command for a specific directory on linux. Pls help me for this. Here's an excerpt from my script: $exec $options & echo pid:$!: I expect the pid to be echoed right away, but it's not.

What's New? For example, to execute a process that is external to the Java VM, we use the exec() method. SCJP 1.4 - SCJP 6 - SCWCD 5 - OCEEJBD 6 - OCEJPAD 6 How To Ask Questions How To Answer Questions Sg Ramkumar Greenhorn Posts: 5 posted 6 years But you don't need it anyway, because all processes launched with Runtime.exec are placed in the background anyway.

Using flags vs. Two commands! See the * GNU Lesser Public License for more details. * You should have received a copy of the GNU Lesser Public License * along with this program. One command at a time.) and then print the outcome of sort. 2.

What I was looking for is somewhat different: execute 'grep -e file.txt', catch the stream. He just tried to solve it via writing app, but his question isn't about it at all. –janot Aug 12 '14 at 6:44 add a comment| 1 Answer 1 active oldest What you do with the output of the command executed is entirely up to you and the application you're creating. (Note: There is also a getOutputStream() method that you can use Here's what I've got now: package com.mycompany.myapp; import android.app.*; import android.os.*; import android.view.*; import android.widget.*; import java.io.*; public class MainActivity extends Activity { /** Called when the activity is first created.

I do manipulations on files. http://www.java-forums.org/new-java/17044-run-command-background-useing-runtime.html Also, there are differences between these classes and the classes shared in this article, so please be careful to keep them separate, or keep a copy of each, as they aren't I'd suggest IllegalArgumentException. hello alvin, thanks for such really nice article, it helps me a lot.

Dear engineers: Please build friendly robots Anyone who has read science fiction can tell you that killer robots are a problem. this content If i run it on a separate thread, i get the same behaviour, of course not blocking the main app thread. The first part is easy: Make sure your Perl script is executable (i.e., do a "chmod +x" on your script), and make sure it runs just fine from the command line. Since I am having a lot of trouble making people understand this concept, it wouldn't surprise me if it weren't possible.

Update request using table alias Is improving a simple algorithm without beating the state of the art still publishable? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed java system shell runtime run java exec java execute exec command bufferedreader Java exec: How to execute a system command pipeline in Java Perl “exec”: How to execute system commands A weblink Well, I'm trying to run JAR command for creating Java ARchive from Java code.

other than those warnings, good luck! :) Reply Add new comment Your name Email The content of this field is kept private and will not be shown publicly. Then you use the getInputStream() and getErrorStream() methods of the Process object to read the normal output of the command, and the error output of the command. I have asked a lot of people, and they all come up with the solution you showed above.

Business...

As soon as Java gets hold of the first line of output of the grep command, manipulate it and send it to the next shell command. android shell background pid android-scripting share|improve this question edited Mar 9 '14 at 20:32 asked Mar 7 '14 at 0:46 MidnightJava 739416 add a comment| 1 Answer 1 active oldest votes done"); OutputStream stdin = pr.getOutputStream(); String carriageReturn = "\n"; stdin.write(carriageReturn.getBytes() ); stdin.flush(); stdin.close(); BufferedReader input = new BufferedReader(new InputStreamReader(pr.getInputStream())); String line=null; while((line=input.readLine()) != null) { // System.out.println(line); } int exitVal = There are two parts to your answer.

Posted By asdfg (9 replies) 12-17-2016, 06:15 PM in New To Java String Variable Issue In loop Posted By vknehra10 (2 replies) 12-17-2016, 06:40 AM in New To Java htmlunitdriver missing In our first example, we will attempt to execute the Java compiler (javac.exe):Listing 4.1 BadExecJavac.java import java.util.*; import java.io.*; public class BadExecJavac { public static void main(String args[]) { try { if you have your Java web app running in a JVM, just add this line of code to a JSP you can hit (put it inside of some PRE tags), and check over here One odd thing i noticed that (not sure if its the cause of the result of the problem) is when the exec is not working, by issuing a ps in adb

Am I doing it wrong, or does Android just not support this? Reply With Quote 03-17-2009,09:48 AM #6 itaipee Member Join Date Dec 2008 Posts 99 Rep Power 0 very well First the listener: public class DoubleClickOnList extends MouseAdapter { public void mouseClicked(MouseEvent android process exec execution share|improve this question edited Apr 18 '13 at 22:00 imz -- Ivan Zakharyaschev 2,56942572 asked Dec 4 '11 at 16:27 Viorel 613 add a comment| 1 Answer There is a way to do that with another Drupal module, but I haven't experimented with that module yet.)     Reply Submitted by alvin on April 29, 2010 - 1:50pm Permalink

To run the LogCat command in my Service I have used the below code: Process p = Runtime.getRuntime().exec("logcat -v time -f /mnt/sdcard/log.txt &"); The above code is running in background and You might get away without handling stderr this time but at some point in this project or the next it will jump up and bite you. Learn more about this here. Reply With Quote 03-16-2009,09:09 AM #3 itaipee Member Join Date Dec 2008 Posts 99 Rep Power 0 First , well, I tried "tcsh nedit a1.txt &" - and yet, the &

Daconta How-To When Runtime.exec() won't Navigate yourself around pitfalls related to the Runtime.exec() method JavaWorld | Dec 29, 2000 12:00 AM PT Email a friend To Use commas to separate multiple