在大多厂商的主板开发中,cmd命令行使用很频繁,那么我们就来看一下,在安卓程序中怎么使用它:
fun execRootCmdSilent(cmd: String?) {
var process: Process? = null
var os: DataOutputStream? = null
var successResult: BufferedReader? = null
var errorResult: BufferedReader? = null
var successMsg: StringBuilder? = null
var errorMsg: StringBuilder? = null
// String cmd = new String("input keyevent 21\n");
val commandResult = ShellUtils.CommandResult(1)
try {
process = Runtime.getRuntime().exec("su")
os = DataOutputStream(process.outputStream)
//环境温度 sht30 p\n 温度mlx90640\n vl53l0x_test\n
os.writeBytes(cmd)
os.writeBytes("exit\n")
os.flush()
os.close()
commandResult.result = process.waitFor()
successMsg = StringBuilder()
errorMsg = StringBuilder()
successResult =
BufferedReader(InputStreamReader(process.inputStream))
errorResult =
BufferedReader(InputStreamReader(process.errorStream))
var s: String?
while (successResult.readLine().also { s = it } != null) successMsg.append(s)
while (errorResult.readLine().also { s = it } != null) errorMsg.append(s)
commandResult.successMsg = successMsg.toString()
commandResult.errorMsg = errorMsg.toString()
Log.e(
"TAG",
commandResult.result.toString() + " | " + commandResult.successMsg + " | " + commandResult.errorMsg
)
} catch (e: Exception) {
val errmsg = e.message
if (errmsg != null) {
Log.i("TAG", errmsg)
} else {
e.printStackTrace()
}
} finally {
try {
os?.close()
successResult?.close()
errorResult?.close()
} catch (e: IOException) {
val errmsg = e.message
if (errmsg != null) {
Log.v("TAG", errmsg)
} else {
e.printStackTrace()
}
}
process?.destroy()
}
}
package com.airiche.singlepointlibrary;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;
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>
*
* @author <a href="http://www.trinea.cn" target="_blank">Trinea</a>
* 2013-5-16
*/
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;
}
}
}
今天我们主要看的方法是execRootCmdSilent(""),你们可以直接使用execRootCmdSilent这个方法,比如我想输出log
execRootCmdSilent("adb shell logcat\n") 就可以输出log内容,但是这个一般不建议使用,log太多了
使用su命令记得权限!