An Android custom animation inside a view using a bitmap.

CrackerAnimation.java

package com.webile.cracker;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;

public class CrackerAnimationActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.main);
        CrackerView crackerView = new CrackerView(this);
        setContentView(crackerView);
    }
    
    class CrackerView extends View {

    	Paint vertexPaint;
    	int counter;
    	
    	Bitmap fireIcon;
    	//animation velocity = 200px / second.
    	public CrackerView(Context context) {
    		super(context);
    		fireIcon = BitmapFactory.decodeResource(getResources(), R.drawable.fire);
    		vertexPaint = new Paint();
    		vertexPaint.setAntiAlias(true);
    		vertexPaint.setColor(0xFF66009A);
    		vertexPaint.setStyle(Paint.Style.STROKE);
    		vertexPaint.setStrokeJoin(Paint.Join.ROUND);
    		vertexPaint.setStrokeCap(Paint.Cap.ROUND);
    		vertexPaint.setStrokeWidth(2);
    	}

    	@Override
    	protected void onDraw(Canvas canvas) {
    		super.onDraw(canvas);

    		int endX = 400 - 8*counter;
    		canvas.drawLine(100, 100, endX, 100, vertexPaint);
    		canvas.drawBitmap(fireIcon, endX-6, 100-12, null);
    		if(endX > 100)
    		mHandler.postDelayed(new Runnable() {
    			
    			@Override
    			public void run() {
    				// TODO Auto-generated method stub
    				counter++;
    				invalidate();
    			}
    		}, 1000/25);
    	}
    	Handler mHandler = new Handler();
    	
    	/**
    	 * Invoke this method to animate the line.
    	 */
    	public void lightCracker() {
    		
    		counter = 0;
    		invalidate();
    	}
    	
    	private class Line {
    		int startX, startY;
    		int endX, endY;
    		
    		
    	}
    }
}