Example usage for java.lang Math round

Introduction

In this page you can find the example usage for java.lang Math round.

Prototype

public static long round(double a)

Source Link

Document

Returns the closest long to the argument, with ties rounding to positive infinity.

Usage

From source file:Main.java

public static double pxToDp(Context context, double px) {
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    double dp = Math.round(px / (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
    return dp;//  www  .  j ava 2  s. com
}

From source file:Main.java

public static double dpToPx(Context context, double dp) {
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    double px = Math.round(dp * (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
    return px;//from w  ww .  j  av a 2  s.  co  m
}

From source file:Main.java

public static Double round(double value, int precision) {
    int scale = (int) Math.pow(10, precision);
    return (double) Math.round(value * scale) / scale;
}

From source file:Main.java

private static boolean checkNum(int num) {
    boolean needsAn = false;

    // eight, eleven, eighty and eighteen
    if (num == 11 || num == 18 || num == 8 || (num >= 80 && num < 90)) {
        needsAn = true;// w w w .java 2s .  co m

    } else if (num > 1000) {
        num = Math.round(num / 1000);
        needsAn = checkNum(num);
    }

    return needsAn;
}

From source file:Main.java

public static double round(double amount) {
    return (Math.round(amount * 100.0D) / 100.0D);
}

From source file:Main.java

public static double round(double value, int places) {
    if (places < 0) {
        throw new IllegalArgumentException();
    }/*from w  w  w.  ja va2 s.com*/

    long factor = (long) Math.pow(10, places);
    value = value * factor;
    long tmp = Math.round(value);
    return (double) tmp / factor;
}

From source file:Main.java

public static int dpToPx(Context mContext, int dp) {
    if (mContext == null) {
        return 0;
    }//from w  w w  .  j  a v a 2s .  c  o m
    DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
    int px = Math.round(dp * (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
    return px;
}

From source file:Main.java

/**
 * Converts a size value in dp scale into pixel scale.
 *//*from ww  w  .j ava2 s . c o  m*/
public static int dpToPx(Context context, int dp) {
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    int px = Math.round(dp * (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
    return px;
}

From source file:Main.java

/**
 * Converts a size value in pixel scale into dp scale.
 *//*from  w  ww  .  ja  v a 2  s  . co m*/
public static int pxToDp(Context context, int px) {
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    int dp = Math.round(px / (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
    return dp;
}

From source file:Main.java

public static int scalePow2(int height, int width) {
    int scale = 1;
    int size = Math.max(height, width);
    if (size > IMAGE_MAX_SIZE) {
        scale = (int) Math.pow(2, (int) Math.round(Math.log(IMAGE_MAX_SIZE / (double) size) / Math.log(0.5)));
    }//from  ww  w.  j  a v  a  2s .  c o m
    return scale;
}