android上root权限的代码，工具类还提供在手机上执行指令的方法。PS：并不是所有手机都能root成功，开发项目时尽量不要考虑root，这个代码看看就行。
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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; }} |
原文：http://blog.csdn.net/u014311042/article/details/41984361