android在apk中获取root权限,并执行命
来源:互联网 发布:专供淘宝买不到的东西 编辑:程序博客网 时间:2024/06/05 14:23
http://www.2cto.com/kf/201210/159834.html
在apk中,有时候需要root权限,例如通过apk更新系统库等system的文件等,避免升级固件,或者在apk中需要直接访问某些设备等。下面是在apk中获取root权限的方法,前提是设备已经root过了。
关键点在于下面这句,通过执行su产生一个具有root权限的进程:
Process p = Runtime.getRuntime().exec("su");
然后,在向这个进程的写入要执行的命令,即可达到以root权限执行命令:
dos = new DataOutputStream(p.getOutputStream());
dos.writeBytes(cmd + "\n");
dos.flush();
或者用下面的方式:
Runtime.getRuntime().exec(new String[]{"/system/bin/su","-c", cmd});
经过测试,以root权限执行命令,只在真机上测试成功,在模拟器上没有成功过。
第一次运行时,会出现请求root权限的界面,选中记住,并允许:
测试程序界面,如果已经root,界面中可以显示出/system分区对应的设备节点:
主要文件:RootCmd.java
[java]
package org.ckl.root;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import android.util.Log;
public final class RootCmd {
private static final String TAG = "RootCmd";
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) {
Log.i(TAG, "have root!");
mHaveRoot = true;
} else {
Log.i(TAG, "not root!");
}
} else {
Log.i(TAG, "mHaveRoot = true, have root!");
}
return mHaveRoot;
}
// 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());
Log.i(TAG, cmd);
dos.writeBytes(cmd + "\n");
dos.flush();
dos.writeBytes("exit\n");
dos.flush();
String line = null;
while ((line = dis.readLine()) != null) {
Log.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());
Log.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;
}
}
相关文件:SystemPartition.java,获取/system分区设备节点,并支持重新mount /system为可读写:
[java]
package org.ckl.root;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import android.util.Log;
public class SystemPartition {
private static final String TAG = "SystemMount";
private static String TMP_PATH = "/sdcard/mount.txt";
private static String mMountPiont = null;
private static boolean mWriteable = false;
private SystemPartition() {
Log.i(TAG, "new SystemMount()");
}
private static class SystemPartitionHolder {
private static SystemPartition instance = new SystemPartition();
}
public SystemPartition getInstance() {
return SystemPartitionHolder.instance;
}
public static String getSystemMountPiont() {
DataInputStream dis = null;
if (mMountPiont == null) {
try {
RootCmd.execRootCmd("mount > " + TMP_PATH);
// Runtime.getRuntime().exec("mount > " + TMP_PATH);
dis = new DataInputStream(new FileInputStream(TMP_PATH));
String line = null;
int index = -1;
while ( (line = dis.readLine()) != null ) {
index = line.indexOf(" /system ");
if (index > 0) {
mMountPiont = line.substring(0, index);
if (line.indexOf(" rw") > 0) {
mWriteable = true;
Log.i(TAG, "/system is writeable !");
} else {
mWriteable = false;
Log.i(TAG, "/system is readonly !");
}
break;
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (dis != null) {
try {
dis.close();
} catch (IOException e1) {
e1.printStackTrace();
}
dis = null;
}
File f = new File(TMP_PATH);
if (f.exists()) {
f.delete();
}
}
}
if (mMountPiont != null) {
Log.i(TAG, "/system mount piont: " + mMountPiont);
} else {
Log.i(TAG, "get /system mount piont failed !!!");
}
return mMountPiont;
}
public static boolean isWriteable() {
mMountPiont = null;
getSystemMountPiont();
return mWriteable;
}
public static void remountSystem(boolean writeable) {
String cmd = null;
getSystemMountPiont();
if (mMountPiont != null && RootCmd.haveRoot()) {
if (writeable) {
cmd = "mount -o remount,rw " + mMountPiont + " /system";
} else {
cmd = "mount -o remount,ro " + mMountPiont + " /system";
}
RootCmd.execRootCmdSilent(cmd);
isWriteable();
}
}
}
- android在apk中获取root权限,并执行命
- android在apk中获取root权限,并执行命令
- android在apk中获取root权限,并执行命令
- android在apk中获取root权限,并执行命令
- android在apk中获取root权限,并执行命令
- android在apk中获取root权限,并执行命令
- android在apk中获取root权限,并执行命令(改变文件权读写限)
- android apk获取root权限
- 怎样使android apk 获取root权限
- 怎样使Android apk 获取root权限
- 怎样使android apk 获取root权限
- android apk获取root权限执行相应的操作 demo调试
- 在代码中设置获取root权限
- Android中Root权限获取(1)
- Android 获取root权限
- Android 获取root权限
- android 获取root权限
- Android获取root权限
- Lua标准库-输入输出处理(input and output facilities)
- LinQ从零开始---初体验
- 由气象站引出的观察者模式 C++实现
- NAND Flash和NOR Flash的区别
- java中新建文件夹
- android在apk中获取root权限,并执行命
- ps 太极八卦图的制作
- Mac OS X10.10_xcode6.1_ios8.1环境下,编译lame静态库libmp3lame.a,支持arm64 armv7s x86_64 i386 armv7指令集
- c++的closure闭包学习
- nginx
- [转]select、poll、epoll的比较
- 安卓模拟器错误记录
- 非阻塞socket编程问题小结
- 给手机安装sqlite3