直接放方法PS：kotlin中称为function（函数）吧，不管哈哈哈，java是世界上最好的语言，但是还是练习下kotlin。
fun suCmd(cmd: String): String {
var process: Process? = null
var os: DataOutputStream? = null
var ls: DataInputStream? = null
var result: String = ""
try {
process = Runtime.getRuntime().exec("su")
os = DataOutputStream(process.outputStream)
ls = DataInputStream(process.inputStream)
os.writeBytes(cmd + "\n")
os.writeBytes("exit\n")
os.flush()
var line = ls.readLine()
while (line != null) {
result += line
line = ls.readLine()
}
process.waitFor()
} catch (e: Exception) {
Log.e("varenyzc", "Exception: " + e.toString())
} finally {
try {
os?.close()
ls?.close()
process?.destroy()
} catch (e: Exception) {
Log.e("varenyzc", "close stream exception: " + e.toString())
}
}
Log.d("varenyzc", "result: " + result)
return result
}
该方法调用后会返回执行命令的结果，结果以String回传。
通过调用这个方法，可以运行任意的命令，若要获取root权限，调用以下方法即可：
suCmd("chmod 777 $packageCodePath")
