android中如何通过代码检测是否有root权限？
android中如何通过代码检测是否有root权限？
-
while
3 票
-
1892
-
andev
3 票
-
5441 -
最佳答案
封装了一个类，代码如下：
- public class ShellCommand {
-
- private Boolean can_su;
-
- public SH sh;
- public SH su;
-
- public ShellCommand() {
- sh = new SH("sh");
- su = new SH("su");
- }
-
- public boolean canSU() {
- return canSU(false);
- }
-
- public boolean canSU(boolean force_check) {
- if (can_su == null || force_check) {
- CommandResult r = su.runWaitFor("id");
- StringBuilder out = new StringBuilder();
-
- if (r.stdout != null)
- out.append(r.stdout).append(" ; ");
- if (r.stderr != null)
- out.append(r.stderr);
-
- can_su = r.success();
- }
- return can_su;
- }
-
- public SH suOrSH() {
- return canSU() ? su : sh;
- }
-
- public class CommandResult {
- public final String stdout;
- public final String stderr;
- public final Integer exit_value;
-
- CommandResult(Integer exit_value_in, String stdout_in, String stderr_in)
- {
- exit_value = exit_value_in;
- stdout = stdout_in;
- stderr = stderr_in;
- }
-
- CommandResult(Integer exit_value_in) {
- this(exit_value_in, null, null);
- }
-
- public boolean success() {
- return exit_value != null && exit_value == 0;
- }
- }
-
- public class SH {
- private String SHELL = "sh";
-
- public SH(String SHELL_in) {
- SHELL = SHELL_in;
- }
-
- public Process run(String s) {
- Process process = null;
- try {
- process = Runtime.getRuntime().exec(SHELL);
- DataOutputStream toProcess = new DataOutputStream(process.getOutputStream());
- toProcess.writeBytes("exec " + s + "\n");
- toProcess.flush();
- } catch(Exception e) {
- process = null;
- }
- return process;
- }
-
- private String getStreamLines(InputStream is) {
- String out = null;
- StringBuffer buffer = null;
- DataInputStream dis = new DataInputStream(is);
-
- try {
- if (dis.available() > 0) {
- buffer = new StringBuffer(dis.readLine());
- while(dis.available() > 0)
- buffer.append("\n").append(dis.readLine());
- }
- dis.close();
- } catch (Exception ex) {
- }
- if (buffer != null)
- out = buffer.toString();
- return out;
- }
-
- public CommandResult runWaitFor(String s) {
- Process process = run(s);
- Integer exit_value = null;
- String stdout = null;
- String stderr = null;
- if (process != null) {
- try {
- exit_value = process.waitFor();
-
- stdout = getStreamLines(process.getInputStream());
- stderr = getStreamLines(process.getErrorStream());
-
- } catch(InterruptedException e) {
- } catch(NullPointerException e) {
- }
- }
- return new CommandResult(exit_value, stdout, stderr);
- }
- }
- }
通过return new ShellCommand().canSU()即可获得。
注意这个方法最好放在异步中做，因为不同的机器检查时间不同。
-
稻草人
8 票
- 1710
-
1、最直接的判断有无root ：判断是否有权限管理。如果已经root，则手机往往会有权限管理器，可用安装需要权限的软件。
2、只要随便写个具有“写入”权限的代码，在Android真机的系统目录里试试就知道，如果“写入”成功，说明具有root权限。
如果非要代码检测，下面代码可以试试
package com.pocketdigi;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import android.app.Activity;
import android.os.Bundle;
public class RootActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
DataInputStream stream;
if(isRooted()){
try {
stream = Terminal("ping -c 2 www.pocketdigi.com");
//其实ping并不需要root权限 ,这里是ping 2次后才停止，所以启动后需要一点时间才会有显示
//你可以自己换成需要root权限的命令试试
String temp;
while((temp=stream.readLine())!=null){
System.out.println(temp);
//循环输出返回值
}
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
public DataInputStream Terminal(String command) throws Exception
{
Process process = Runtime.getRuntime().exec("su");
//执行到这，Superuser会跳出来，选择是否允许获取最高权限
OutputStream outstream = process.getOutputStream();
DataOutputStream DOPS = new DataOutputStream(outstream);
InputStream instream = process.getInputStream();
DataInputStream DIPS = new DataInputStream(instream);
String temp = command + "\n";
//加回车
DOPS.writeBytes(temp);
//执行
DOPS.flush();
//刷新，确保都发送到outputstream
DOPS.writeBytes("exit\n");
//退出
DOPS.flush();
process.waitFor();
return DIPS;
}
public boolean isRooted() {
//检测是否ROOT过
DataInputStream stream;
boolean flag=false;
try {
stream = Terminal("ls /data/");
//目录哪都行，不一定要需要ROOT权限的
if(stream.readLine()!=null)flag=true;
//根据是否有返回来判断是否有root权限
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return flag;
}
}
-
张炎Lior
4 票
-
509 -
使用代码倒真是没试过，不过可以依照linux特性去思考。linux系统下root权限可以使用su命令，android本身也是小型的linux系统，所以可以尝试下面代码试验下：`
public static boolean runRootCommand(String command) {
- Process process = null;
- DataOutputStream os = null;
- try {
- process = Runtime.getRuntime().exec("su");
- os = new DataOutputStream(process.getOutputStream());
- os.writeBytes(command+"\n");
- os.writeBytes("exit\n");
- os.flush();
- process.waitFor();
- } catch (Exception e) {
- Log.d("*** DEBUG ***", "Unexpected error - Here is what I know: "+e.getMessage());
- return false;
- }
- finally {
- try {
- if (os != null) {
- os.close();
- }
- process.destroy();
- } catch (Exception e) {
- // nothing
- }
- }
- return true;
- }
}
`
另外如果不使用代码检测，可以有一个方法，将android设备连接USB调试，待识别设备后输入adb shell,如果出现$表述无root权限，如果出现#则表示有root权限，希望对你有用。
-
davis
1 票
- 1117
-
public static boolean runRootCommand(String command) {
- Process process = null;
- DataOutputStream os = null;
- try {
- process = Runtime.getRuntime().exec("su");
- os = new DataOutputStream(process.getOutputStream());
- os.writeBytes(command+"\n");
- os.writeBytes("exit\n");
- os.flush();
- process.waitFor();
- } catch (Exception e) {
- Log.d("*** DEBUG ***", "Unexpected error - Here is what I know: "+e.getMessage());
- return false;
- }
- finally {
- try {
- if (os != null) {
- os.close();
- }
- process.destroy();
- } catch (Exception e) {
- // nothing
- }
- }
- return true;
- }
}