Add space in adb command

Question

I want to execute "adb" command using Java. I tried out as follow:

Process p = Runtime.getRuntime().exec(new String[]{"cmd","/c","adb devices"});

But, I get following error p.getErrorStream():

'adb' is not recognized as an internal or external command,operable program or batch file.

Is there any problem of space between "adb devices"?

How to add space in command?

Answer 1

The problem is not the space, but the fact that adb is not found (because it's not on the path).

Do one of those two things:

• make sure that the command is executed at the place where adb.exe resides or
• modify PATH (for that command) in a way that adb.exe is in a directory mentioned in PATH.

While both of those are possible with Runtime.exec(), I'd suggest using ProcessBuilder, because it has a much nicer/easier API.

For example to modify the path where the command is executed do this:

ProcessBuilder pb = new ProcessBuilder("cmd","/c","adb devices");
pb.directory(new File("c:\\path\\to\\android\\platform-tools\\");
pb.start();

Answer 2

Most probably problem is in your %PATH% ( or lack thereof ) - it seems that it separated arguments properly. YO may try to use absolute path to adb executable