现在Android手机root权限可以说是轻松就获取得到的，而关于判断手机是否已经root的方法，你了解吗？如果app有一些特殊功能需要root权限，则需要判断是否root。不知道root是不是意味着手机不安全？说到底还是想一台究竟，你可以学习Android应用开发视频教程。下面介绍两种方法：
方法1：
/**
* @author Kevin Kowalewski
*
*/
public class Root {private static String LOG_TAG = Root.class.getName();
public boolean isDeviceRooted() {
if (checkRootMethod1()){return true;}
if (checkRootMethod2()){return true;}
if (checkRootMethod3()){return true;}
return false;
}public boolean checkRootMethod1(){
String buildTags = android.os.Build.TAGS;if (buildTags != null && buildTags.contains(“test-keys”)) {
return true;
}
return false;
}public boolean checkRootMethod2(){
try {
File file = new File(“/system/app/Superuser.apk”);
if (file.exists()) {
return true;
}
} catch (Exception e) { }return false;
public boolean checkRootMethod3() {
if (new ExecShell().executeCommand(SHELL_CMD.check_su_binary) != null){
return true;
}else{
return false;
}
}
}
/**
* @author Kevin Kowalewski
*
*/
public class ExecShell {
private static String LOG_TAG = ExecShell.class.getName();
public static enum SHELL_CMD {
check_su_binary(new String[] {“/system/xbin/which”,”su”}),
;
String[] command;
SHELL_CMD(String[] command){
this.command = command;
}
}
public ArrayList<String> executeCommand(SHELL_CMD shellCmd){
String line = null;
ArrayList<String> fullResponse = new ArrayList<String>();
Process localProcess = null;
try {
localProcess = Runtime.getRuntime().exec(shellCmd.command);
} catch (Exception e) {
return null;
//e.printStackTrace();
}
BufferedWriter out = new BufferedWriter(new OutputStreamWriter(localProcess.getOutputStream()));
BufferedReader in = new BufferedReader(new InputStreamReader(localProcess.getInputStream()));
try {
while ((line = in.readLine()) != null) {
Log.d(LOG_TAG, “–> Line received: ” + line);
fullResponse.add(line);
}
} catch (Exception e) {
e.printStackTrace();
}
Log.d(LOG_TAG, “–> Full response was: ” + fullResponse);
return fullResponse;
}
}
代码来自stackoverflow，向作者致敬。
方法2：
The RootTools library offers simple methods to check for root:
一个开源项目：http://code.google.com/p/roottools/
RootTools.isRootAvailable()判断是否root
RootTools.isAccessGiven()返回true那么手机已经root并且app也被授予root权限。
String commandToExecute = “su”;
executeShellCommand(commandToExecute);
private boolean executeShellCommand(String command){
Process process = null;
try{
process = Runtime.getRuntime().exec(command);
return true;
} catch (Exception e) {
return false;
} finally{
if(process != null){
try{
process.destroy();
}catch (Exception e) {
}
}
}
}
ps：使用这些方法有可能将手机系统拖的非常慢，当应用多次启动后会创建出很多个僵死的进程耗用内存。
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