public static final String path="/sdcard/mokeelog";
    public static String saveLog() throws IOException
    {
        String filePath=path;
        Runtime runtime=Runtime.getRuntime();
        File file=new File(filePath);
        if(file.exists())
        {
            file.delete();
        }
        file.createNewFile();
        RandomAccessFile raf=new RandomAccessFile(file, "rw");
        raf.seek(raf.length());
        raf.writeBytes("Device:"+android.os.Build.DEVICE);
        raf.writeBytes("\nVersion:"+CommonUtils.getInstalledVersion());
        raf.writeBytes("\n***********************************************************\n");
        raf.close();
        runtime.exec("logcat -d -f "+filePath).destroy();
        return filePath;
    }
    public static String getInstalledVersion() {
        return SystemProperties.get("ro.mk.version");
    }