How to use NumberFormat Class in Android? – Rounding a number in android, formatting, getting decimal values etc in android.

package com.coderzheaven.numberformattest;

import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;
import android.app.Activity;
import android.os.Bundle;
import android. widget. TextView;

public class MainActivity extends Activity {
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    
        TextView tv = new TextView(this);
        tv.setPadding(10, 10, 10, 10);
		NumberFormat numberFormat  = new DecimalFormat("##");
		String str = numberFormat.format(-01234.567);         // -1235
		tv.setText(str + "\n\n");
 
		str = numberFormat.format(00);                 // 0
		tv.append(str + "\n\n");
 
		numberFormat = new DecimalFormat("##00");
		str = numberFormat.format(0);                 // 00
		tv.append(str + "\n\n");
 
		numberFormat = new DecimalFormat(".00");
		str = numberFormat.format(-.4567);             // -.46
		tv.append(str + "\n\n");
 
		numberFormat = new DecimalFormat("0.000");
		str = numberFormat.format(-.34567);             // -0.346
		tv.append(str + "\n\n");
 
		numberFormat = new DecimalFormat("#.######");
		str = numberFormat.format(-012.34567);         // -12.34567
		tv.append(str + "\n\n");
 
		numberFormat = new DecimalFormat("#.000000");
		str = numberFormat.format(-1234.567);         // -1234.567000
		tv.append(str + "\n\n");
		
		numberFormat = new DecimalFormat("#,###,###");
		str = numberFormat.format(-01234567.890);      // -1 234 568
		tv.append(str + "\n\n");
 
		numberFormat = new DecimalFormat("'text'#");
		str = numberFormat.format(+1234.567);         // text1235		
		tv.append(str + "\n\n");
 
		// Exponential notation
		numberFormat = new DecimalFormat("00.00E0");
		str = numberFormat.format(-012345.67);         // -12.35E2		
		tv.append(str + "\n\n");
		
		// 	set locale format
		// FRANCE  locale
		Locale locale = Locale.FRANCE;
		str = NumberFormat.getNumberInstance(locale).format(-123456.789);  // -123 456,789
		tv.append(str + "\n\n");
		
		setContentView(tv);
		
    }
}