Hello all….
This is a simple example showing how to sort a string array which is a arraylist in android.
we sort the array using the “Collections” class in android.
Here is a simple example
package com.coderzheaven.pack;import java.util.ArrayList;import java.util.Arrays;import java.util.Collections;import java.util.Comparator;import android.app.Activity;import android.os.Bundle;public class SortingStringsDemo extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ArrayList<String> my_array = new ArrayList<String>(); //Add elements to Arraylist my_array.add("CoderzHeaven"); my_array.add("Google"); my_array.add("Android"); my_array.add("apple"); my_array.add("android"); my_array.add("Microsoft"); my_array.add("Samsung"); //sorting function Collections.sort(my_array); //display elements of ArrayList System.out.println("ArrayList elements after sorting in ascending order : "); System.out.println(Arrays.toString(my_array.toArray())); System.out.println("ArrayList elements Comparing - ignorecase"); IgnoreCaseComparator icc = new IgnoreCaseComparator(); java.util.Collections.sort(my_array,icc); Collections.sort(my_array); System.out.println(Arrays.toString(my_array.toArray())); System.out.println("Reversing the ArrayList"); Collections.sort(my_array, Collections.reverseOrder()); System.out.println(Arrays.toString(my_array.toArray())); } class IgnoreCaseComparator implements Comparator<String> { public int compare(String strA, String strB) { return strA.compareToIgnoreCase(strB); } }} |
Take a look at the LogCat for the output.
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