public static int adjustFontSize(int screenWidth, int screenHeight){
    
    if (screenWidth <= 240) {     // 240X320 屏幕
      
      return 10;

    }else if (screenWidth <= 320){  // 320X480 屏幕

      return 14;

    }else if (screenWidth <= 480){  // 480X800 或 480X854 屏幕

      return 24;

    }else if (screenWidth <= 540){  // 540X960 屏幕 

      return 26;
      
    }else if(screenWidth <= 800){ // 800X1280 屏幕 

      return 30;
      
    }else{              // 大于 800X1280

      return 30;
      
    }
  }