How to execute shell scripts in an Android program

In the case of Android applications, it is often necessary to execute shell scripts to quickly implement certain functions;

Executing shell scripts in an Android application saves you a lot of tedious code and avoids unnecessary errors;

For example: When copying a folder, you can execute the CP command in the shell command to achieve the purpose, and in the code to implement the Copy folder, not only need to write a lot of tedious code, but also easy to fall into the recursive loop error;

For example: To get the file system read and write permissions, just to execute a shell script in a sentence mount-o Rw,remount/can be easily done;

For example: Delete a file under a folder, or a class of files, or all the files, only need to execute a shell script in a sentence rm-f * (with * wildcard characters to match) can easily be done;

Another example: Silent installation, only need to execute a shell script in a PM install-r can achieve the purpose;

If these are implemented in code, not only the amount of code increases, but also easy to create a lot of bugs, thankless!

If you can execute the shell script in the Android application to achieve the goal, you can save a lot of code, avoid many easy to make mistakes, simple and efficient, why not?

Here is an example of a tool class that executes shell scripts in an Android app for your reference:

1  Packagecom.example.test; 2   3 ImportJava.io.BufferedReader; 4 ImportJava.io.DataOutputStream; 5 Importjava.io.IOException; 6 ImportJava.io.InputStreamReader; 7   8 ImportAndroid.util.Log; 9   Ten /**  One * Execute Shell Script Tool class A  * @authorMountain -  *  -  */   the  Public classcommandexecution { -    -      Public Static FinalString TAG = "Commandexecution";  -        +      Public Final StaticString command_su = "SU";  -      Public Final StaticString command_sh = "SH";  +      Public Final StaticString command_exit = "exit\n";  A      Public Final StaticString command_line_end = "\ n";  at    -     /**  - * Command Execution Results -      * @authorMountain -      *  -      */   in      Public Static classCommandresult { -          Public intresult =-1;  to          PublicString errormsg;  +          PublicString successmsg;  -     }   the    *     /**  $ * Execute command- singlePanax Notoginseng      * @paramCommand -      * @paramIsRoot the      * @return  +      */   A      Public StaticCommandresult execcommand (String command,BooleanisRoot) {   thestring[] Commands ={command};  +         returnexeccommand (commands, isRoot);  -     }   $    $     /**  - * Execute command-Multiple lines -      * @paramcommands the      * @paramIsRoot -      * @return Wuyi      */   the      Public StaticCommandresult execcommand (string[] commands,BooleanisRoot) {   -Commandresult Commandresult =NewCommandresult ();  Wu         if(Commands = =NULL|| Commands.length = = 0)returnCommandresult;  -Process Process =NULL;  AboutDataOutputStream OS =NULL;  $BufferedReader Successresult =NULL;  -BufferedReader Errorresult =NULL;  -StringBuilder successmsg =NULL;  -StringBuilder errormsg =NULL;  A         Try {   +Process = Runtime.getruntime (). EXEC (isRoot?command_su:command_sh);  theOS =NewDataOutputStream (Process.getoutputstream ());  -              for(String command:commands) { $                 if(Command! =NULL) {   the Os.write (Command.getbytes ());  the os.writebytes (command_line_end);  the Os.flush ();  the                 }   -             }   in os.writebytes (command_exit);  the Os.flush ();  theCommandresult.result =process.waitfor ();  About             //Get error message theSuccessmsg =NewStringBuilder ();  theErrorMsg =NewStringBuilder ();  theSuccessresult =NewBufferedReader (NewInputStreamReader (Process.getinputstream ()));  +Errorresult =NewBufferedReader (NewInputStreamReader (Process.geterrorstream ()));  - String S;  the              while((s = successresult.readline ())! =NULL) Successmsg.append (s); Bayi              while((s = errorresult.readline ())! =NULL) Errormsg.append (s);  theCommandresult.successmsg =successmsg.tostring ();  theCommandresult.errormsg =errormsg.tostring ();  -LOG.I (TAG, Commandresult.result + "|" +commandresult.successmsg -+ " | " +commandresult.errormsg);  the}Catch(IOException e) { theString errmsg =E.getmessage ();  the             if(ErrMsg! =NULL) {   the log.e (TAG, errmsg);  -}Else {   the E.printstacktrace ();  the             }   the}Catch(Exception e) {94String errmsg =E.getmessage ();  the             if(ErrMsg! =NULL) {   the log.e (TAG, errmsg);  the}Else {  98 E.printstacktrace ();  About             }   -}finally {  101             Try {  102                 if(OS! =NULL) Os.close (); 103                 if(Successresult! =NULL) Successresult.close (); 104                 if(Errorresult! =NULL) Errorresult.close ();  the}Catch(IOException e) {106String errmsg =E.getmessage (); 107                 if(ErrMsg! =NULL) {  108 log.e (TAG, errmsg); 109}Else {   the E.printstacktrace (); 111                 }   the             }  113             if(Process! =NULL) Process.destroy ();  the         }   the         returnCommandresult;  the     }  117       118}

How to execute shell scripts in an Android program