Android粒子效果 |
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ActivityMain.java [java] view plaincopy public class DrawThread extends Thread { ParticleView pv; SurfaceHolder suraceHolder; boolean isRunning; int sleepSpan = 15; long start = System.nanoTime(); int count = 0; public DrawThread(ParticleView pv, SurfaceHolder suraceHolder) { this.isRunning = true; this.pv = pv; this.suraceHolder = suraceHolder; } @Override public void run() { Canvas canvas = null; while(isRunning){ try{ canvas = suraceHolder.lockCanvas(); synchronized(suraceHolder){ pv.doDraw(canvas); } }catch(Exception e){ e.printStackTrace(); }finally{ if(canvas!=null){ suraceHolder.unlockCanvasAndPost(canvas); } } this.count++; if(count == 20){ count = 0; long tempStamp = System.nanoTime(); //获取当前时间 long span = tempStamp - start; //获取时间间隔 start = tempStamp; //为start重新赋值 double fps = Math.round(100000000000.0/span*20)/100.0;//计算帧速率 pv.fps = "FPS:"+fps;//将计算出的帧速率设置到BallView的相应字符串对象中 } try{ Thread.sleep(sleepSpan);//线程休眠一段时间 } catch(Exception e){ e.printStackTrace();//捕获并打印异常 } } } }
DrawThread.java [java] view plaincopy public class ActivityMain extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); //不显示标题 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); ParticleView lz = new ParticleView(this); setContentView(lz); } }
Particle.java [java] view plaincopy public class Particle { int color; //粒子颜色 int r; //粒子半径 double ver_v; //垂直速度 double hor_v; //水平速度 int startX; //初始X坐标 int startY; //初始Y坐标 int x; //实时X坐标 int y; //实时Y坐标 double startTime; //起始时间 public Particle(int color, int r, double ver_v, double hor_v, int x, int y, double startTime) { super(); this.color = color; this.r = r; this.ver_v = ver_v; this.hor_v = hor_v; this.startX = x; this.startY = y; this.x = x; this.y = y; this.startTime = startTime; } }
ParticleSet.java [java] view plaincopy public class ParticleSet { ArrayList particleSet; public ParticleSet(){ particleSet = new ArrayList(); } public void addParticle(int count,double startTime){ for(int i=0;i |
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