Android程序执行shell脚本

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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！

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;
}}