Simple Droid App that shows FPS and is a starter to Making a game

package simpleProjects.FPSTest;

import android.app.Activity;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.os.Bundle;

import android.view.View;

public class FPSTestActivity extends Activity {

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        //setContentView(R.layout.main);

        Panel pnl = new Panel(this);

        setContentView(pnl);     

       

    }

    

    class Panel extends View {

        

        // Processing handles fps pinning, but we

        // report fps on our own just to be sure.

        

        /** FPS that we want to achieve */

        final static float targetFPS = 60.0f;

        /** Number of frames to average over when computing real FPS */

        final int fpsAverageCount = 10; 

        /** Array of timings */

        long[] nanos;

        /** When we started the nanotimer */

        long nanoStart; //

        

        /** Number of frames since we started this example. */

        long frameCount = 0;          

        

        Paint _paint = new Paint();

        

        public Panel(Context context) {

            super(context);

        /* Set up the timers for FPS reporting */

        nanos = new long[fpsAverageCount];

        long nanosPerFrameGuess = (long)(1000000000.0 / targetFPS);

        nanos[fpsAverageCount-1] = System.nanoTime();

        for (int i=fpsAverageCount-2; i>=0; --i) {

        nanos[i] = nanos[i+1] - nanosPerFrameGuess;

        }

        nanoStart = System.nanoTime();

       

        _paint = new Paint();

    _paint.setTextSize(14F);

    _paint.setStyle(Paint.Style.FILL);

    _paint.setColor(0xFFDDDDDD);

   

   

    this.setFocusable(true);

    this.requestFocus();

        }

        

 

        @Override

        public void onDraw(Canvas canvas) {

        this.requestFocus();

            canvas.drawColor(Color.BLACK);

    for (int i=0; i<fpsAverageCount-1; ++i) {

    nanos[i] = nanos[i+1];

    }

    nanos[fpsAverageCount-1] = System.nanoTime();

    float averagedFPS = (float) ( (fpsAverageCount-1) * 1000000000.0 / (nanos[fpsAverageCount-1]-nanos[0]));

    ++frameCount;

    float totalFPS = (float) (frameCount * 1000000000 / (1.0*(System.nanoTime()-nanoStart)));

   

    canvas.drawText( "Average FPS ("+fpsAverageCount+" frames): "+averagedFPS, 10, 400, _paint);

    this.invalidate();            

        } //end onDraw

    }//end Panel class

    

}