视频：善知堂Android   http://www.verycd.com/topics/2915940/

第四集：多线程

讲多线程的技术点

第五集（上）：动态效果

class GameView extends View {        private Paint paint = null;        public GameView(Context context) {            super(context);            paint = new Paint();// 画笔            paint.setColor(Color.RED);            paint.setStrokeWidth(5);// 画笔粗            new MyThread().start();        }        class MyThread extends Thread {            @Override            public void run() {                for(int i=0;i<100;i++) {                    try {                        Thread.sleep(1);                    } catch (InterruptedException e) {                        // TODO Auto-generated catch block                        e.printStackTrace();                    }                    GameView.this.postInvalidate();// 重新绘制                }            }        }        @Override        protected void onDraw(final Canvas canvas) {            super.onDraw(canvas);            canvas.drawLine(0, 0, new Random().nextInt(500),                    new Random().nextInt(500), paint);        }    }

可以随机画一条线。