Android ＰＡＴＨ類動態繪製

package com.wcs; import android.R.color; import android.app.Activity; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.ComposePathEffect; import android.graphics.CornerPathEffect; import android.graphics.DashPathEffect; import android.graphics.DiscretePathEffect; import android.graphics.Paint; import android.graphics.Path; import android.graphics.PathDashPathEffect; import android.graphics.PathEffect; import android.graphics.SumPathEffect; import android.os.Bundle; import android.view.View; public class PathTest extends Activity {     @Override     protected void onCreate(Bundle savedInstanceState) {         // TODO Auto-generated method stub         super.onCreate(savedInstanceState);         setContentView(new MyView(this));     }     class MyView extends View {         float phase;         PathEffect[] effects = new PathEffect[7];         int[] colors;         private Paint paint;         Path path;         public MyView(Context context) {             super(context);             paint = new Paint();             paint.setStyle(Paint.Style.STROKE);             paint.setStrokeWidth(4);             path = new Path();             path.moveTo(0, 0);             for (int i = 1; i <= 15; i++) {                 path.lineTo(i * 20, (float) Math.random() * 60);             }             colors = new int[] { Color.BLACK, Color.BLUE, Color.CYAN,                     Color.GREEN, Color.MAGENTA, Color.RED, Color.YELLOW };         }         @Override         protected void onDraw(Canvas canvas) {             canvas.drawColor(Color.WHITE);             effects[0]=null;             effects[1]=new CornerPathEffect(10);             effects[2]=new DiscretePathEffect(3.0f, 5.0f);             effects[3]=new DashPathEffect(new float[]{20,10,5,10}, phase);             Path p=new Path();             p.addRect(0, 0,8,8,Path.Direction.CCW);             effects[4]=new PathDashPathEffect(p, 12, phase,PathDashPathEffect.Style.ROTATE);             effects[5]=new ComposePathEffect(effects[2], effects[4]);             effects[6]=new SumPathEffect(effects[4], effects[3]);             canvas.translate(8, 8);             for(int i=0;i<effects.length;i++){                 paint.setPathEffect(effects[i]);                 paint.setColor(colors[i]);                 canvas.drawPath(path,paint);                 canvas.translate(0, 60);                 phase+=1;                 invalidate();             }                     }     } }