Android(安卓)代码执行Linux Shell小记

引言

Android系统是基于Linux内核运行的，而做为一名Linux粉，不在Android上面运行一下Linux Shell怎么行呢？
最近发现了一个很好的Android Shell工具代码，在这里分享一下。

Shell核心代码

import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.util.List;/** * ShellUtils * <ul> * <strong>Check root</strong> * <li>{@link ShellUtils#checkRootPermission()}</li> * </ul> * <ul> * <strong>Execte command</strong> * <li>{@link ShellUtils#execCommand(String, boolean)}</li> * <li>{@link ShellUtils#execCommand(String, boolean, boolean)}</li> * <li>{@link ShellUtils#execCommand(List, boolean)}</li> * <li>{@link ShellUtils#execCommand(List, boolean, boolean)}</li> * <li>{@link ShellUtils#execCommand(String[], boolean)}</li> * <li>{@link ShellUtils#execCommand(String[], boolean, boolean)}</li> * </ul> */public class ShellUtils {    public static final String COMMAND_SU       = "su";    public static final String COMMAND_SH       = "sh";    public static final String COMMAND_EXIT     = "exit\n";    public static final String COMMAND_LINE_END = "\n";    private ShellUtils() {        throw new AssertionError();    }    /** * check whether has root permission * * @return */    public static boolean checkRootPermission() {        return execCommand("echo root", true, false).result == 0;    }    /** * execute shell command, default return result msg * * @param command command * @param isRoot whether need to run with root * @return * @see ShellUtils#execCommand(String[], boolean, boolean) */    public static CommandResult execCommand(String command, boolean isRoot) {        return execCommand(new String[] {command}, isRoot, true);    }    /** * execute shell commands, default return result msg * * @param commands command list * @param isRoot whether need to run with root * @return * @see ShellUtils#execCommand(String[], boolean, boolean) */    public static CommandResult execCommand(List<String> commands, boolean isRoot) {        return execCommand(commands == null ? null : commands.toArray(new String[] {}), isRoot, true);    }    /** * execute shell commands, default return result msg * * @param commands command array * @param isRoot whether need to run with root * @return * @see ShellUtils#execCommand(String[], boolean, boolean) */    public static CommandResult execCommand(String[] commands, boolean isRoot) {        return execCommand(commands, isRoot, true);    }    /** * execute shell command * * @param command command * @param isRoot whether need to run with root * @param isNeedResultMsg whether need result msg * @return * @see ShellUtils#execCommand(String[], boolean, boolean) */    public static CommandResult execCommand(String command, boolean isRoot, boolean isNeedResultMsg) {        return execCommand(new String[] {command}, isRoot, isNeedResultMsg);    }    /** * execute shell commands * * @param commands command list * @param isRoot whether need to run with root * @param isNeedResultMsg whether need result msg * @return * @see ShellUtils#execCommand(String[], boolean, boolean) */    public static CommandResult execCommand(List<String> commands, boolean isRoot, boolean isNeedResultMsg) {        return execCommand(commands == null ? null : commands.toArray(new String[] {}), isRoot, isNeedResultMsg);    }    /** * execute shell commands * * @param commands command array * @param isRoot whether need to run with root * @param isNeedResultMsg whether need result msg * @return <ul> * <li>if isNeedResultMsg is false, {@link CommandResult#successMsg} is null and * {@link CommandResult#errorMsg} is null.</li> * <li>if {@link CommandResult#result} is -1, there maybe some excepiton.</li> * </ul> */    public static CommandResult execCommand(String[] commands, boolean isRoot, boolean isNeedResultMsg) {        int result = -1;        if (commands == null || commands.length == 0) {            return new CommandResult(result, null, null);        }        Process process = null;        BufferedReader successResult = null;        BufferedReader errorResult = null;        StringBuilder successMsg = null;        StringBuilder errorMsg = null;        DataOutputStream os = null;        try {            process = Runtime.getRuntime().exec(isRoot ? COMMAND_SU : COMMAND_SH);            os = new DataOutputStream(process.getOutputStream());            for (String command : commands) {                if (command == null) {                    continue;                }                // donnot use os.writeBytes(commmand), avoid chinese charset error                os.write(command.getBytes());                os.writeBytes(COMMAND_LINE_END);                os.flush();            }            os.writeBytes(COMMAND_EXIT);            os.flush();            result = process.waitFor();            // get command result            if (isNeedResultMsg) {                successMsg = new StringBuilder();                errorMsg = new StringBuilder();                successResult = new BufferedReader(new InputStreamReader(process.getInputStream()));                errorResult = new BufferedReader(new InputStreamReader(process.getErrorStream()));                String s;                while ((s = successResult.readLine()) != null) {                    successMsg.append(s);                }                while ((s = errorResult.readLine()) != null) {                    errorMsg.append(s);                }            }        } catch (IOException e) {            e.printStackTrace();        } catch (Exception e) {            e.printStackTrace();        } finally {            try {                if (os != null) {                    os.close();                }                if (successResult != null) {                    successResult.close();                }                if (errorResult != null) {                    errorResult.close();                }            } catch (IOException e) {                e.printStackTrace();            }            if (process != null) {                process.destroy();            }        }        return new CommandResult(result, successMsg == null ? null : successMsg.toString(), errorMsg == null ? null                : errorMsg.toString());    }    /** * result of command * <ul> * <li>{@link CommandResult#result} means result of command, 0 means normal, else means error, same to excute in * linux shell</li> * <li>{@link CommandResult#successMsg} means success message of command result</li> * <li>{@link CommandResult#errorMsg} means error message of command result</li> * </ul> */    public static class CommandResult {        /** result of command **/        public int    result;        /** success message of command result **/        public String successMsg;        /** error message of command result **/        public String errorMsg;        public CommandResult(int result) {            this.result = result;        }        public CommandResult(int result, String successMsg, String errorMsg) {            this.result = result;            this.successMsg = successMsg;            this.errorMsg = errorMsg;        }    }}

ShellUtils代码引用自：Trinea

小实例

是否root

public Boolean isRooted(){    CommandResult cmdResult = ShellUtils.execCommand("su", true);    if (cmdResult.errorMsg.equals("Permission denied") || cmdResult.result != 0) {        return false;    }else{        return true;    }}

复制文件

String[] commands = new String[] { "mount -o rw,remount /system", "cp /mnt/sdcard/xx.apk /system/app/" };public boolean copyFile(String[] cmdText){    CommandResult cmdResult = ShellUtils.execCommand(cmdText, true);    if (cmdResult.errorMsg.equals("Permission denied") || cmdResult.result != 0) {        return false;    }else{        return true;    }}

我暂时就举这两个例子，只要你会Shell，什么操作都是可以的。

博客名称：王乐平博客

博客地址：http://blog.lepingde.com

CSDN博客地址：http://blog.csdn.net/lecepin

引言

Shell核心代码

小实例

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