android su 執行 命令

 執行單行命令：

/**
     * 執行Android命令
     *
     * @param cmd 命令
     */
    public static String execSuCmd(String cmd) {
        String out = "";
        Process process = null;
        DataOutputStream os = null;
        DataInputStream is = null;
        try {
            process = Runtime.getRuntime().exec("su");
            os = new DataOutputStream(process.getOutputStream());
            os.writeBytes(cmd + "\n");
            os.writeBytes("exit\n");
            os.flush();
            int aa = process.waitFor();
            is = new DataInputStream(process.getInputStream());
            byte[] buffer = new byte[is.available()];
            is.read(buffer);
            out = new String(buffer);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (os != null) {
                    os.close();
                }
                if (is != null) {
                    is.close();
                }
                if (process != null) {
                    process.destroy();
                }

            } catch (Exception e) {
            }
        }
        return out;
    }

多行命令： 

ArrayList<String> commandList = new ArrayList<String>();
commandList.add("reboot");
ExecuteAsRoot executeAsRoot = new ExecuteAsRoot(commandList);
executeAsRoot.execute();

public class ExecuteAsRoot extends AExecuteAsRoot {
    ArrayList<String> list;

    public ExecuteAsRoot(ArrayList<String> list) {
        this.list = list;
    }

    @Override
    protected ArrayList<String> getCommandsToExecute() {
        return list;
    }
}

public abstract class AExecuteAsRoot {
    public static boolean canRunRootCommands() {
        boolean retval = false;
        Process suProcess;

        try {
            suProcess = Runtime.getRuntime().exec("su");

            DataOutputStream os = new DataOutputStream(suProcess.getOutputStream());
            DataInputStream osRes = new DataInputStream(suProcess.getInputStream());

            if (null != os && null != osRes) {
                // Getting the id of the current user to check if this is root
                os.writeBytes("id\n");
                os.flush();

                String currUid = osRes.readLine();
                boolean exitSu = false;
                if (null == currUid) {
                    retval = false;
                    exitSu = false;
                    Log.d("ROOT", "Can't get root access or denied by user");
                } else if (true == currUid.contains("uid=0")) {
                    retval = true;
                    exitSu = true;
                    Log.d("ROOT", "Root access granted");
                } else {
                    retval = false;
                    exitSu = true;
                    Log.d("ROOT", "Root access rejected: " + currUid);
                }

                if (exitSu) {
                    os.writeBytes("exit\n");
                    os.flush();
                }
            }
        } catch (Exception e) {
            // Can't get root !
            // Probably broken pipe exception on trying to write to output
            // stream after su failed, meaning that the device is not rooted

            retval = false;
            Log.d("ROOT",
                    "Root access rejected [" + e.getClass().getName() + "] : " + e.getMessage());
        }

        return retval;
    }

    public final boolean execute() {
        boolean retval = false;

        try {
            ArrayList<String> commands = getCommandsToExecute();
            if (null != commands && commands.size() > 0) {
                Process process = Runtime.getRuntime().exec("su");

                DataOutputStream os = new DataOutputStream(process.getOutputStream());

                for (String currCommand : commands) {
                    os.writeBytes(currCommand + "\n");
                    os.flush();
                }

                os.writeBytes("exit\n");
                os.flush();

                BufferedReader reader = new BufferedReader(new InputStreamReader(
                        process.getInputStream()));
                int read;
                char[] buffer = new char[4096];
                StringBuffer output = new StringBuffer();
                while ((read = reader.read(buffer)) > 0) {
                    output.append(buffer, 0, read);
                }
                reader.close();

                try {
                    int suProcessRetval = process.waitFor();
                    if (255 != suProcessRetval) {
                        retval = true;
                    } else {
                        retval = false;
                    }
                    System.out.println("BBBB: " + output.toString());
                } catch (Exception ex) {
                    //Log.e("Error executing root action", ex);
                }
            }
        } catch (IOException ex) {
            Log.w("ROOT", "Can't get root access", ex);
        } catch (SecurityException ex) {
            Log.w("ROOT", "Can't get root access", ex);
        } catch (Exception ex) {
            Log.w("ROOT", "Error executing internal operation", ex);
        }

        return retval;
    }

    protected abstract ArrayList<String> getCommandsToExecute();
}