Android 代码执行shell指令

Android 执行shell指令

方式一：此方式如果执行的代码带echo开头，会没有作用。可能是echo这个指令会被优先执行。

public static void executeCommand(String command) {

Runtime mRuntime = Runtime.getRuntime();

try {

//Process中封装了返回的结果和执行错误的结果

Process mProcess = mRuntime.exec(command);

BufferedReader mReader = new BufferedReader(new InputStreamReader(mProcess.getInputStream()));

StringBuffer mRespBuff = new StringBuffer();

char[] buff = new char[1024];

int ch = 0;

while ((ch = mReader.read(buff)) != -1) {

mRespBuff.append(buff, 0, ch);

}

mReader.close();

System.out.print(mRespBuff.toString());

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

方式二：可以执行echo开头或者ping 开头的shell指令代码

Runtime mRuntime = Runtime.getRuntime();

mRuntime.exec(new String[] {"/bin/sh", "-c", "echo 1 > /sys/class/sensor_class/accel_calibration"});

一个工具类：

public class ShellUtils {
private static final String TAG = "ShellUtils";

public static final String COMMAND_SU = "su";
public static final String COMMAND_SH = "sh";
public static final String COMMAND_EXIT = "exitn";
public static final String COMMAND_LINE_END = "n";

private ShellUtils() {
throw new AssertionError();
}

/**
* 查看是否有了root权限
*
* @return
*/
public static boolean checkRootPermission() {
return execCommand("echo root", true, false).result == 0;
}

/**
* 执行shell命令，默认返回结果
*
* @param command
* command
* @param isRoot
* need root permission
* @return
* @see ShellUtils#execCommand(String[], boolean, boolean)
*/
public static CommandResult execCommand(String command, boolean isRoot) {
return execCommand(new String[] { command }, isRoot, true);
}

/**
* 执行shell命令，默认返回结果
*
* @param commands
* command list
* @param isRoot
* need root permission
* @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);
}

/**
* 执行shell命令，默认返回结果
*
* @param commands
* command array
* @param isRoot
* need root permission
* @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
* need root permission
* @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
* need root permission
* @param isNeedResultMsg
* result
* @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
* need root permission
* @param isNeedResultMsg
* result
* @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());
}

/**
* 运行结果
* <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>
*
* @author <a href="http://www.trinea.cn" target="_blank">Trinea</a>
* 2013-5-16
*/
public static class CommandResult {
/** 运行结果 **/
public int result;
/** 运行成功结果 **/
public String successMsg;
/** 运行失败结果 **/
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;
}
}
}