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權限,則需要判斷是否root。比如一些市場下載完app後自動安裝。
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public class Root {
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private static String LOG_TAG = Root.class.getName();
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public boolean isDeviceRooted() {
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if (checkRootMethod1()){return true;}
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if (checkRootMethod2()){return true;}
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if (checkRootMethod3()){return true;}
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return false;
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}
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public boolean checkRootMethod1(){
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String buildTags = android.os.Build.TAGS;
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if (buildTags != null && buildTags.contains("test-keys")) {
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return true;
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}
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return false;
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}
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public boolean checkRootMethod2(){
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try {
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File file = new File("/system/app/Superuser.apk");
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if (file.exists()) {
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return true;
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}
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} catch (Exception e) { }
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return false;
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}
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public boolean checkRootMethod3() {
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if (new ExecShell().executeCommand(SHELL_CMD.check_su_binary) != null){
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return true;
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}else{
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return false;
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}
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}
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}
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public class ExecShell {
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private static String LOG_TAG = ExecShell.class.getName();
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public static enum SHELL_CMD {
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check_su_binary(new String[] {"/system/xbin/which","su"}),
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;
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String[] command;
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SHELL_CMD(String[] command){
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this.command = command;
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}
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}
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public ArrayList<String> executeCommand(SHELL_CMD shellCmd){
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String line = null;
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ArrayList<String> fullResponse = new ArrayList<String>();
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Process localProcess = null;
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try {
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localProcess = Runtime.getRuntime().exec(shellCmd.command);
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} catch (Exception e) {
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return null;
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}
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BufferedWriter out = new BufferedWriter(new OutputStreamWriter(localProcess.getOutputStream()));
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BufferedReader in = new BufferedReader(new InputStreamReader(localProcess.getInputStream()));
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try {
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while ((line = in.readLine()) != null) {
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Log.d(LOG_TAG, "--> Line received: " + line);
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fullResponse.add(line);
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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Log.d(LOG_TAG, "--> Full response was: " + fullResponse);
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return fullResponse;
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}
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}
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權限。
另外:據那片帖子的一個回貼人說使用
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String commandToExecute = "su";
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executeShellCommand(commandToExecute);
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private boolean executeShellCommand(String command){
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Process process = null;
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try{
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process = Runtime.getRuntime().exec(command);
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return true;
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} catch (Exception e) {
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return false;
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} finally{
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if(process != null){
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try{
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process.destroy();
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}catch (Exception e) {
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}
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}
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}
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}
會引起非常嚴重的性能問題,將手機系統拖的非常慢,當應用多次啓動後會創建出很多個僵死的進程耗用內存。
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: