argic for android實現比例尺，沒有相關圖層Api,所以介面顯示只能自己實現，以下是計算方法：

public void getScaleText(double scale) {
    scale /= 100;//轉成釐米：米
    String formatStr = null;
    if(scale >= 1000){
        scale /= 1000;
        formatStr = "%1$.1f公里";
    }else if(scale >= 1 ){
        formatStr = "%1$.1f米";
    }else if(scale
 
 >= 0.1){
        scale *= 10;
        formatStr = "%1$.1f分米";
    }else{
        scale *= 100;
        formatStr = "%1$.1f釐米";
    }   
    return String.format(formatStr, (float)scale);
}