问Android get进程连续输出

EN

try {
            Process chmod = Runtime.getRuntime().exec("getevent -lt /dev/input/event1");

            BufferedReader reader = new BufferedReader(new InputStreamReader(chmod.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();
            chmod.waitFor();
            String outputString =  output.toString();
            Log.d("output", outputString);
        } catch (IOException e) {
            throw new RuntimeException(e);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }