我正在尝试在 Android 中执行这个简单的 unix ls:
cd /data
然后
ls
它应该返回/data 文件夹的所有内容。
我已经编码了:
try {
String line;
Process p = Runtime.getRuntime().exec(new String[] { "ls /data"});
BufferedReader in = new BufferedReader(
new InputStreamReader(p.getInputStream()) );
while ((line = in.readLine()) != null) {
Log.d("debugging", line);
}
in.close();
}
catch (Exception e) {
e.printStackTrace();
}
我现在面临的问题是,我一次只能执行一个命令。例如,如果我写 ls/data
它什么都不返回。看来他不喜欢空格。
如果我只写一个像“ls”这样返回根目录列表的单词,一切正常:
03-19 22:51:59.241: D/debugging(16274): acct
03-19 22:51:59.241: D/debugging(16274): cache
03-19 22:51:59.241: D/debugging(16274): config
03-19 22:51:59.241: D/debugging(16274): crashtag
03-19 22:51:59.241: D/debugging(16274): d
03-19 22:51:59.241: D/debugging(16274): data
03-19 22:51:59.241: D/debugging(16274): default.prop
03-19 22:51:59.241: D/debugging(16274): dev
03-19 22:51:59.241: D/debugging(16274): etc
03-19 22:51:59.241: D/debugging(16274): fstab
03-19 22:51:59.241: D/debugging(16274): init
03-19 22:51:59.241: D/debugging(16274): init.clrdex.sh
03-19 22:51:59.241: D/debugging(16274): init.goldfish.rc
03-19 22:51:59.241: D/debugging(16274): init.hostapd.sh
03-19 22:51:59.241: D/debugging(16274): init.rc
03-19 22:51:59.241: D/debugging(16274): init.semc.rc
03-19 22:51:59.241: D/debugging(16274): init.usbmode.sh
03-19 22:51:59.241: D/debugging(16274): logo.rle
03-19 22:51:59.241: D/debugging(16274): mnt
03-19 22:51:59.241: D/debugging(16274): mr.log
03-19 22:51:59.241: D/debugging(16274): proc
03-19 22:51:59.241: D/debugging(16274): root
03-19 22:51:59.241: D/debugging(16274): sbin
03-19 22:51:59.241: D/debugging(16274): sdcard
03-19 22:51:59.241: D/debugging(16274): sys
03-19 22:51:59.241: D/debugging(16274): system
03-19 22:51:59.241: D/debugging(16274): ueventd.goldfish.rc
03-19 22:51:59.241: D/debugging(16274): ueventd.rc
03-19 22:51:59.241: D/debugging(16274): ueventd.semc.rc
03-19 22:51:59.241: D/debugging(16274): vendor
我已经像有人提到的那样尝试用多个命令填充该数组,但它没有返回任何内容。空白。
{"ls","ls"} //this should return twice ls result.
关于如何在 Android 运行时“连接”命令的任何想法?
最佳答案
我认为你需要 root 访问权限才能执行 ls/data
命令,所以你应该先获取 su shell 然后执行命令,例如:
// run command with su rights and return output of that command(inside su
// shell)
// command = "ls /data"
public static void suOutputExecute(String command) {
try {
int BUFF_LEN = 1024;
Process p = Runtime.getRuntime().exec(new String[] { "su", "-c", "system/bin/sh" });
DataOutputStream stdin = new DataOutputStream(p.getOutputStream());
// from here all commands are executed with su permissions
stdin.writeBytes(command + "\n"); // \n executes the command
InputStream stdout = p.getInputStream();
byte[] buffer = new byte[BUFF_LEN];
int read;
String out = new String();
// while((read=stdout.read(buffer))>0) won't work here
while (true) {
read = stdout.read(buffer);
out += new String(buffer, 0, read);
if (read < BUFF_LEN) {
// we have read everything
break;
}
}
stdout.close();
Log.e("ROOT", out);
p.waitFor();
} catch (Exception e) {
Log.e("ROOT", "Error", e);
}
}
您需要 Root设备。对于模拟器,您仍然需要安装 super 用户。
对于不需要 su 的命令,下面的代码应该可以工作(我现在无法测试它):
public static void shExecute(String[] commands) {
Process shell = null;
DataOutputStream out = null;
BufferedReader in = null;
try {
// Acquire sh
Log.i(LOG_TAG, "Starting exec of sh");
shell = Runtime.getRuntime().exec("sh");//su if needed
out = new DataOutputStream(shell.getOutputStream());
in = new BufferedReader(new InputStreamReader(shell.getInputStream()));
// Executing commands without root rights
Log.i(LOG_TAG, "Executing commands...");
for (String command : commands) {
Log.i(LOG_TAG, "Executing: " + command);
out.writeBytes(command + "\n");
out.flush();
}
out.writeBytes("exit\n");
out.flush();
String line;
StringBuilder sb = new StringBuilder();
while ((line = in.readLine()) != null) {
sb.append(line).append("\n");
}
Log.i(LOG_TAG, sb.toString());
shell.waitFor();
} catch (Exception e) {
Log.e(LOG_TAG, "ShellRoot#shExecute() finished with error", e);
} finally {
try {
if (out != null) {
out.close();
}
if(in != null){
in.close();
}
// shell.destroy();
} catch (Exception e) {
// hopeless
}
}
}
关于java - 在 Runtime exec 上执行多次执行,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15511261/