Android PathEffect效果实例源码.zip

package com.zixing.phil.patheffect; 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.PathDashPathEffect.Style; import android.graphics.PathEffect; import android.graphics.SumPathEffect; import android.util.AttributeSet; import android.view.View; public class PathEffectView extends View{ private Paint mPaint; private Paint starPaint; private Path mPath; private Path star; private float phase = 0; public PathEffectView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(); } public PathEffectView(Context context, AttributeSet attrs) { super(context, attrs); init(); } public PathEffectView(Context context) { super(context); init(); } @Override protected void onDraw(Canvas canvas) { canvas.drawColor(Color.WHITE); for(int i=0;i<9;i++){ mPath.moveTo(0, 0+(i*50)); mPath.lineTo(50, 30+(i*50)); mPath.lineTo(100,0+(i*50)); mPath.lineTo(150, 30+(i*50)); mPath.lineTo(200, 0+(i*50)); PathEffect pe = null; switch (i) { case 0: pe = new CornerPathEffect(10); break; case 1: pe = new DashPathEffect(new float[]{10f,3f}, phase); break; case 2: pe = new DiscretePathEffect(5f, 10f); break; case 3: pe = new PathDashPathEffect(star, 20, phase, Style.ROTATE); break; case 4: pe = new PathDashPathEffect(star, 20, phase, Style.MORPH); break; case 5: pe = new PathDashPathEffect(star, 20, phase, Style.TRANSLATE); break; case 6: PathEffect cpeOuter = new PathDashPathEffect(star, 20, phase, Style.MORPH); PathEffect cpeInner = new DiscretePathEffect(5f, 10f); pe = new ComposePathEffect(cpeOuter, cpeInner); break; case 7: PathEffect cpe1 = new PathDashPathEffect(star, 20, phase, Style.MORPH); PathEffect cpe2 = new DiscretePathEffect(5f, 10f); pe = new SumPathEffect(cpe1, cpe2); break; default: break; } mPaint.setPathEffect(pe); canvas.drawPath(mPath, mPaint); mPath.reset(); } phase+=2; invalidate(); } private void init(){ mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(2); mPaint.setColor(Color.RED); mPath = new Path(); starPaint = new Paint(Paint.ANTI_ALIAS_FLAG); starPaint.setStyle(Paint.Style.FILL_AND_STROKE); starPaint.setColor(Color.YELLOW); star(10); } private void star(float length){ star = new Path(); float dis1 = (float)((length/2)/Math.tan((54f/180)*Math.PI)); float dis2 = (float)(length*Math.sin((72f/180)*Math.PI)); float dis3 = (float)(length*Math.cos((72f/180)*Math.PI)); star.moveTo(length/2, 0); star.lineTo(length/2-dis3, dis2); star.lineTo(length, dis1); star.lineTo(0, dis1); star.lineTo(length/2+dis3, dis2); star.lineTo(length/2, 0); } }