在作Android應用時,常常須要執行shell腳本,以快速實現某些功能;java
在Android應用程序中執行shell腳本能夠省去一大堆繁瑣的代碼,還能夠避免沒必要要的錯誤;android
好比:拷貝文件夾時,能夠執行shell命令中的 cp 命令達到目的;而在代碼中實現拷貝文件夾時,不只須要編寫一大堆繁瑣的代碼,還容易陷入遞歸死循環的錯誤中;shell
好比:獲取文件系統的讀寫權限,只須要執行shell腳本中一句 mount -o rw,remount / 就能輕鬆搞定;app
好比:刪除文件夾下某一個文件、或者某一類文件、或者所有文件,只須要執行shell腳本中的一句 rm -f *(利用*通配符進行匹配) 就能輕鬆搞定;工具
再好比:靜默安裝時,只須要執行shell腳本中一句 pm install -r 即可達到目的;ui
若是這些都用代碼來實現,不只代碼量增長,還容易形成不少bug,吃力不討好!spa
package com.example.test; import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStreamReader; import android.util.Log; /** * 執行shell腳本工具類 * @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執行結果 * @author Mountain * */ public static class CommandResult { public int result = -1; public String errorMsg; public String successMsg; } /** * 執行命令—單條 * @param command * @param isRoot * @return */ public static CommandResult execCommand(String command, boolean isRoot) { String[] commands = {command}; return execCommand(commands, isRoot); } /** * 執行命令-多條 * @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(); //獲取錯誤信息 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; } }
若是能在android應用中執行shell腳原本達到目的,能夠省去一大堆代碼,避免不少易犯的錯誤,簡潔高效,何樂而不爲呢?!code
下面給出一個在Android應用中執行shell腳本的工具類的示例,供你們參考:blog