android判斷手機是否root

標籤：手機系統   stackoverflow   開源項目   

關於判斷手機是否已經root的方法。如果app有一些特殊功能需要root許可權，則需要判斷是否root。比如一些市場下載完app後自動安裝。

/** * @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;    }}

代碼來自stackoverflow，向作者致敬。

方法2：

The RootTools library offers simple methods to check for root:

一個開源項目：http://code.google.com/p/roottools/

RootTools.isRootAvailable()判斷是否root

RootTools.isAccessGiven()返回true那麼手機已經root並且app也被授予root許可權。

另外：據那片文章的一個回貼人說使用

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) {            }        }    }}

會引起非常嚴重的效能問題，將手機系統拖的非常慢，當應用多次啟動後會建立出很多個僵死的進程耗用記憶體。
參考http://stackoverflow.com/questions/1101380/determine-if-running-on-a-rooted-device

To sum up; I have no advice for you to determine if device is rooted or not. But if I were you I would not use Runtime.getRuntime().exec().

By the way; RootTools.isRootAvailable() causes same problem.
The RootTools library offers simple methods to check for root: