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package
com.linin.utils;
import
java.io.DataInputStream;
import
java.io.DataOutputStream;
import
java.io.IOException;
/**
*
root权限工具类
*
*
@author linin
*
*/
public
class
RootUtil {
private
static
final
String TAG = "linin.root";
private
static
boolean
mHaveRoot = false;
/**
*
判断机器Android是否已经root，即是否获取root权限
*/
public
static
boolean
haveRoot() {
if
(!mHaveRoot) {
int
ret = execRootCmdSilent("echo
test");
//
通过执行测试命令来检测
if
(ret != -1)
{
L.i(TAG,
"have
root!");
mHaveRoot
= true;
}
else
{
L.i(TAG,
"not
root!");
}
}
else
{
L.i(TAG,
"mHaveRoot
= true, have root!");
}
return
mHaveRoot;
}
/**
获取root权限 */
public
static
boolean
root() {
try
{
Runtime.getRuntime().exec(
new
String[] { "/system/bin/su",
"-c",
"chmod
777 /dev/graphics/fb0"
});
}
catch
(IOException e) {
e.printStackTrace();
L.i(TAG,
"root
fail!");
return
false;
}
L.i(TAG,
"root
success!");
return
true;
}
/**
*
执行命令并且输出结果
*/
public
static
String execRootCmd(String cmd) {
String
result = "";
DataOutputStream
dos = null;
DataInputStream
dis = null;
try
{
Process
p = Runtime.getRuntime().exec("su");//
经过Root处理的android系统即有su命令
dos
= new
DataOutputStream(p.getOutputStream());
dis
= new
DataInputStream(p.getInputStream());
L.i(TAG,
cmd);
dos.writeBytes(cmd
+ "\n");
dos.flush();
dos.writeBytes("exit\n");
dos.flush();
String
line = null;
while
((line = dis.readLine()) != null)
{
L.d("result",
line);
result
+= line;
}
p.waitFor();
}
catch
(Exception e) {
e.printStackTrace();
}
finally
{
if
(dos != null)
{
try
{
dos.close();
}
catch
(IOException e) {
e.printStackTrace();
}
}
if
(dis != null)
{
try
{
dis.close();
}
catch
(IOException e) {
e.printStackTrace();
}
}
}
return
result;
}
/**
*
执行命令但不关注结果输出
*/
public
static
int
execRootCmdSilent(String cmd) {
int
result = -1;
DataOutputStream
dos = null;
try
{
Process
p = Runtime.getRuntime().exec("su");
dos
= new
DataOutputStream(p.getOutputStream());
L.i(TAG,
cmd);
dos.writeBytes(cmd
+ "\n");
dos.flush();
dos.writeBytes("exit\n");
dos.flush();
p.waitFor();
result
= p.exitValue();
}
catch
(Exception e) {
e.printStackTrace();
}
finally
{
if
(dos != null)
{
try
{
dos.close();
}
catch
(IOException e) {
e.printStackTrace();
}
}
}
return
result;
}
}
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