根据屏幕大小设置字体

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;

    }
}