Android程序中如何执行shell脚本

原文链接： https://blog.csdn.net/sowhat_Ah/article/details/43228621

在做Android应用时，经常需要执行shell脚本，以快速实现某些功能；

在Android应用程序中执行shell脚本可以省去一大堆繁琐的代码，还可以避免不必要的错误；

比如：拷贝文件夹时，可以执行shell命令中的 cp 命令达到目的；而在代码中实现拷贝文件夹时，不仅需要编写一大堆繁琐的代码，还容易陷入递归死循环的错误中；

比如：获取文件系统的读写权限，只需要执行shell脚本中一句 mount -o rw,remount / 就能轻松搞定；

比如：删除文件夹下某一个文件、或者某一类文件、或者全部文件，只需要执行shell脚本中的一句 rm -f (利用通配符进行匹配) 就能轻松搞定；

再比如：静默安装时，只需要执行shell脚本中一句 pm install -r 便可达到目的；
如果这些都用代码来实现，不仅代码量增加，还容易造成很多bug，吃力不讨好！

如果能在android应用中执行shell脚本来达到目的，可以省去一大堆代码，避免很多易犯的错误，简洁高效，何乐而不为呢？！

下面给出一个在Android应用中执行shell脚本的工具类的示例，供大家参考：

package com.example.test; import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader; import android.util.Log; /** * 执行shell脚本工具类 * @author Mountain * */public class CommandExecution { public static final String TAG = "CommandExecution";public final static String COMMAND_SU       = "su";public final static String COMMAND_SH       = "sh";public final static String COMMAND_EXIT     = "exit\n";public final static String COMMAND_LINE_END = "\n"; /** * Command执行结果 * @author Mountain * */public static class CommandResult {public int result = -1;public String errorMsg;public String successMsg;} /** * 执行命令—单条 * @param command * @param isRoot * @return */public static CommandResult execCommand(String command, boolean isRoot) {String[] commands = {command};return execCommand(commands, isRoot);} /** * 执行命令-多条 * @param commands * @param isRoot * @return */public static CommandResult execCommand(String[] commands, boolean isRoot) {CommandResult commandResult = new CommandResult();if (commands == null || commands.length == 0) return commandResult;Process process = null;DataOutputStream os = null;BufferedReader successResult = null;BufferedReader errorResult = null;StringBuilder successMsg = null;StringBuilder errorMsg = null;try {process = Runtime.getRuntime().exec(isRoot ? COMMAND_SU : COMMAND_SH);os = new DataOutputStream(process.getOutputStream());for (String command : commands) {if (command != null) {os.write(command.getBytes());os.writeBytes(COMMAND_LINE_END);os.flush();}}os.writeBytes(COMMAND_EXIT);os.flush();commandResult.result = process.waitFor();//获取错误信息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);commandResult.successMsg = successMsg.toString();commandResult.errorMsg = errorMsg.toString();Log.i(TAG, commandResult.result + " | " + commandResult.successMsg+ " | " + commandResult.errorMsg);} catch (IOException e) {String errmsg = e.getMessage();if (errmsg != null) {Log.e(TAG, errmsg);} else {e.printStackTrace();}} catch (Exception e) {String errmsg = e.getMessage();if (errmsg != null) {Log.e(TAG, errmsg);} else {e.printStackTrace();}} finally {try {if (os != null) os.close();if (successResult != null) successResult.close();if (errorResult != null) errorResult.close();} catch (IOException e) {String errmsg = e.getMessage();if (errmsg != null) {Log.e(TAG, errmsg);} else {e.printStackTrace();}}if (process != null) process.destroy();}return commandResult;}}

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