Android Shell Command Execute Demo

1  Packagecom.android.utils;2 3 4 ImportJava.io.File;5 6 Importjava.io.IOException;7 ImportJava.io.InputStream;8 Importjava.util.ArrayList;9 Importjava.util.List;Ten  One /** A * This class is primarily used to execute Linux shell commands at the Java layer to obtain information under some systems - * The DMESG in this example require some additional permissions to use -  * @authorZENGJF the  */ -  Public classShellExecute { -     /** - * This function is used to execute the Linux shell command +      *  -      * @paramCommand shell commands, support pipeline, redirect +      * @paramDirectory executes commands under the specified directory A      * @returnreturn shell command execution result at      * @throwsIOException throws IOException -      */ -      Public Staticstring Execute (String command, string directory) -             throwsIOException { -          -         //Check the arguments in         if(NULL==command) -             return""; to  +         if(Command.trim (). Equals (""))  -             return""; the          *         if(NULL= = Directory | | Directory.trim (). Equals (""))  $directory = "/";Panax Notoginseng  -String result = "" ;  the  +List<string> Cmds =NewArraylist<string>();  ACmds.add ("sh");  theCmds.add ("-C");  + cmds.add (command); -  $         Try {   $Processbuilder Builder =NewProcessbuilder (CMDS);  -        -             if(Directory! =NULL )   theBuilder.directory (NewFile (directory));  - WuyiBuilder.redirecterrorstream (true) ;  theProcess Process =Builder.start ();  -        Wu             //get the result after the command executes -InputStream is =Process.getinputstream ();  About             byte[] buffer =New byte[1024] ;  $              while(Is.read (buffer)! =-1 ) -result = result +NewString (buffer);  -  - Is.close ();  A}Catch(Exception e) { + E.printstacktrace ();  the         }   -         returnResult.trim ();  $     }   the  the     /** the * This function is used to execute the Linux shell command, the execution directory is specified as: "/" the      *  -      * @paramCommand shell commands, support pipeline, redirect in      * @returnreturn shell command execution result the      * @throwsIOException throws IOException the      */ About      Public StaticString execute (String command)throwsIOException { the  the         //Check the arguments the         if(NULL==command) +             return""; -  the         if(Command.trim (). Equals ("")) Bayi             return""; the  the         returnExecute (Command, "/"); -     }   -      the     /** the * This function is used to determine if there is a pattern string in DMESG, and the execution directory is specified as: "/" the      *  the      * @paramstring that pattern matches grep -      * @returnstrings in pattern are present in TRUE:DMESG <br> the * String in pattern does not exist in FALSE:DMESG the      * @throwsIOException throws IOException the      */94      Public Static BooleanDeviceexist (String pattern)throwsioexception{ the  the         //Check the arguments the         if(NULL==pattern)98             return false; About  -         if(Pattern.trim (). Equals ("")) 101             return false;102 103         returnExecute ("DMESG | grep "+ pattern". Length () > 0;104     } the}

Android Shell Command Execute Demo