Android Open Source - TheNewBoston G F X Surface

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Back to project page TheNewBoston.

License

The source code is released under:

Eclipse Public License - v 1.0 THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES RECI...

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Java Source Code

package com.homelysoft.thenewboston.gfx;
//w w  w  .j  a  va2  s  .  c o m
import javax.vecmath.Point3f;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnTouchListener;

import com.homelysoft.thenewboston.R;

public class GFXSurface extends Activity implements OnTouchListener {

  MySurfaceView mySurfaceView;
  Point3f pos, start, finish, invalidPoint, speed, animate, scale, acce;
  Bitmap ball;
  Paint circlePaint;
  boolean showCursor = false, showBall = false;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mySurfaceView = new MySurfaceView(this);
    mySurfaceView.setOnTouchListener(this);
    setContentView(mySurfaceView);
    pos = new Point3f(0, 0, 0);
    invalidPoint = new Point3f(0, 0, 0);
    start = new Point3f(0, 0, 0);
    finish = new Point3f(0, 0, 0);
    speed = new Point3f(0, 0, 0);
    animate = new Point3f(0, 0, 0);
    scale = new Point3f(0, 0, 0);
    acce = new Point3f(0, 0.1f, 0);
    ball = BitmapFactory.decodeResource(getResources(), R.drawable.b_ball);
    circlePaint = new Paint();
    circlePaint.setColor(Color.GREEN);
  }

  @Override
  protected void onPause() {
    super.onPause();
    mySurfaceView.pause();
  }

  @Override
  protected void onResume() {
    super.onResume();
    mySurfaceView.resume();
  }

  @Override
  public boolean onTouch(View view, MotionEvent event) {
    pos.setX(event.getX());
    pos.setY(event.getY());
    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
      start.set(pos);
      showCursor = true;
      break;
    case MotionEvent.ACTION_UP:
      finish.setX(event.getX());
      finish.setY(event.getY());
      animate.set(pos);
      speed.set(start);
      speed.sub(finish);
      speed.scale(0.05f);
      showCursor = false;
      showBall = true;
      break;
    }
    return true;
  }

  public class MySurfaceView extends SurfaceView implements Runnable {

    SurfaceHolder holder;
    Thread thread = null;
    private boolean isRunning = false;

    public MySurfaceView(Context context) {
      super(context);
      holder = getHolder();
    }

    public void pause() {
      isRunning = false;
      while (true) {
        try {
          thread.join();
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
        break;
      }
      thread = null;
    }

    public void resume() {
      isRunning = true;
      thread = new Thread(this);
      thread.start();

    }

    @Override
    public void run() {
      while (isRunning) {
        if (!holder.getSurface().isValid()) {
          continue;
        }
        Canvas canvas = holder.lockCanvas();
        canvas.drawRGB(02, 200, 200);

        animate.add(speed);
        speed.add(acce);
        if (animate.getY() + ball.getHeight()/2 >= canvas.getHeight()) {
          speed.negate();
        }
        
        if (showCursor) {
          canvas.drawCircle(pos.getX(), pos.getY(), 30, circlePaint);
        }
        if (!pos.equals(invalidPoint)) {
          canvas.drawCircle(start.getX(), start.getY(), 10,
              circlePaint);
          canvas.drawCircle(finish.getX(), finish.getY(), 10,
              circlePaint);
          if (showBall)
            canvas.drawBitmap(ball,
                animate.getX() - ball.getWidth() / 2,
                animate.getY() - ball.getHeight() / 2, null);
        }
        holder.unlockCanvasAndPost(canvas);
        try {
          Thread.sleep(25);
        } catch (InterruptedException e) {
          e.printStackTrace();
        }
      }

    }

  }

}

Java Source Code List