ColinTreeMath.java

package cn.colintree.aix.ColinTreeMath;

import android.content.Context;
import android.util.Log;
import com.google.appinventor.components.annotations.*;
import com.google.appinventor.components.common.*;
import com.google.appinventor.components.runtime.*;
import com.google.appinventor.components.runtime.util.*;

@DesignerComponent(version = ColinTreeMath.VERSION,
    description = "by ColinTree at http://aix.colintree.cn",
    category = ComponentCategory.EXTENSION,
    nonVisible = true,
    iconName = "images/extension.png")

@SimpleObject(external = true)

public class ColinTreeMath extends AndroidNonvisibleComponent implements Component {
    public static final int VERSION = 2;
    private ComponentContainer container;
    private Context context;
    private static final String LOG_TAG = "ColinTreeMath";
    public ColinTreeMath(ComponentContainer container) {
        super(container.$form());
        this.container = container;
        context = (Context) container.$context();
        Log.d(LOG_TAG, "ColinTreeMath Created");
    }
    
    // Max - Zui Da Shu
    @SimpleFunction(description = "Find the max number in the list, return min double if the list is empty. Also, please make sure there are all number in the list")
    public double Max(YailList list) {
    	Object[] lst = list.toArray();
    	double tmp, max = Double.MIN_VALUE;
    	for (int i = 0; i < list.size(); i++) {
    		tmp = new Double(lst[i].toString());
    		if (max < tmp) max = tmp;
    	}
    	return max;
    }
    // Min - Zui Xiao Shu
    @SimpleFunction(description = "Find the min number in the list, return max double if the list is empty. Also, please make sure there are all number in the list")
    public double Min(YailList list) {
    	Object[] lst = list.toArray();
    	double tmp, min = Double.MAX_VALUE;
    	for (int i = 0; i < list.size(); i++) {
    		tmp = new Double(lst[i].toString());
    		if (min > tmp) min = tmp;
    	}
    	return min;
    }
    // Average - Ping Jun
    @SimpleFunction(description = "Return the average of the numbers in the list. Please make sure there are all number in the list")
    public double Average(YailList list) {
    	Object[] lst = list.toArray();
    	double tmp, tot = 0;
    	for (int i = 0; i < list.size(); i++) {
    		tmp = new Double(lst[i].toString());
    		tot += tmp;
    	}
    	return tot / list.size();
    }
    // Bubble Sort in ascending order - Sheng Xu Mao Pao
    @SimpleFunction(description = "(Sheng Xu Pai Xu - Mao Pao Pai Xu) Sort the number in the list in ascending order. Please make sure there are all number in the list")
    public YailList SortAscend(YailList list) {
    	Object[] rst = new Object[list.size()], lst=list.toArray();
    	double[] forSort = new double[list.size()];
    	double tmp;
    	for (int i = 0; i < list.size(); i++) {
    		forSort[i] = new Double(lst[i].toString());
    	}
    	for (int i = 0; i < list.size() - 1; i++) {
    		for (int j = i + 1; j < list.size(); j++) {
    			if (forSort[i] > forSort[j]) {
    				tmp = forSort[i];
    				forSort[i] = forSort[j];
    				forSort[j] = tmp;
    			}
    		}
    	}
    	for (int i = 0; i < list.size(); i++) {
    		rst[i] = forSort[i];
    	}
    	return YailList.makeList(rst);
    }
    // Sort in descending order - Jiang Xu Mao Pao
    @SimpleFunction(description = "(Jiang Xu Pai Xu - Mao Pao Pai Xu) Sort the number in the list in decending order. Please make sure there are all number in the list")
    public YailList SortDecend(YailList list) {
    	Object[] rst = new Object[list.size()], lst = list.toArray();
    	double[] forSort = new double[list.size()];
    	double tmp;
    	for (int i = 0; i < list.size(); i++) {
    		forSort[i] = new Double(lst[i].toString());
    	}
    	for (int i = 0; i < list.size() - 1; i++) {
    		for (int j = i + 1; j < list.size(); j++) {
    			if (forSort[i] < forSort[j]) {
    				tmp = forSort[i];
    				forSort[i] = forSort[j];
    				forSort[j] = tmp;
    			}
    		}
    	}
    	for (int i = 0; i < list.size(); i++) {
    		rst[i] = forSort[i];
    	}
    	return YailList.makeList(rst);
    }
    //greatest common divisor - Zui Da Gong Yue Shu
    @SimpleFunction(description = "(Zui Da Gong Yue Shu)Return the greatest common divisor, auto-round down into integer if it is not")
    public int GCD(int number1, int number2) {
    	if (number1 == number2) {
    		return number1;
    	}
    	if (number1 < number2) {
    		return GCD(number2, number1);
    	} else {
    		if ((number1 % 2 == 0) && (number2 % 2 == 0)) {
    			return GCD(number1 >> 1, number2 >> 1) << 1;
    		} else if ((number1 % 2 == 0) && (number2 % 2 != 0)) {
    			return GCD(number1 >> 1, number2);
    		} else if ((number1 % 2 != 0) && (number2 % 2 == 0)) {
    			return GCD(number1, number2 >> 1);
    		} else {
    			return GCD(number2, number1 - number2);
    		}
    	}
    	// return number2 ? gcd(b, a % b) : a;    //from qq1139855151 He Bei Shi Jia Zhuang Chen
    }
    //Least common multiple - Zui Xiao Gong Bei Shu
    @SimpleFunction(description = "(Zui Xiao Gong Bei Shu)Return the least common multiple, auto-round down into integer if it is not")
    public int LCM(int number1, int number2) {
    	int gcd = GCD(number1, number2);
    	return number1 * number2 / gcd;
    }
    //Power - Qiu Mi
    @SimpleFunction(description = "(Qiu Mi: number^n)Return number^n")
    public double Power(double number, double n) {
    	double tmp, y = 1;
    	n = Math.floor(n);
    	while (true) {
    		tmp = n % 2;
    		n = Math.floor(n / 2);
    		if (tmp == 1)
    			y = y * number;
    		if (n == 0)
    			break;
    		number = number * number;
    	}
    	return y;
    }
    //Pi - π
    @SimpleFunction(description = "(π)Return pi")
    public double Pi() {
    	return Math.PI;
    }
    //e - e
    @SimpleFunction(description = "(e)Return Natural logarithm e")
    public double e() {
    	return Math.E;
    }
    //Cube root (Li Fang Gen)
    @SimpleFunction(description = "(Li Fang Gen)Return 3√num")
    public double CbRt(double number) {
    	return Math.cbrt(number);
    }
    //log10
    @SimpleFunction(description = "Return Log 10,number")
    public double Log10(double number) {
    	return Math.log10(number);
    }
    //1/√num
    @SimpleFunction(description = "Return 1/√num")
    public double ROTSR(double number) {
    	return 1 / Math.sqrt(number);
    }
    //sqrt(number1^2 +number2^2)
    @SimpleFunction(description = "Return sqrt(number1^2 +number2^2)")
    public double hypot(double number1, double number2) {
    	return Math.hypot(number1, number2);
    }
    //Prime number (Zhi Shu)
    @SimpleFunction(description = "Return true if number is prime number")
    public boolean Prime(int number) {
    	if (number == 2)
    		return true;
    	else if (number % 2 == 0)
    		return false;
    	else for (int i = 3; i <= Math.sqrt(number); i += 2)
    		if (number % i == 0)
    			return false;
    	return true;
    }
}