陶瓷企业 瓷砖地板公司网站建设,如何做营销,wordpress没有远程发布,企业网站建设费用预算Path类可以预先在View上将N个点连成一条路径,然后调用Canvas的drawPath(path,paint)即可沿着路径绘制图形 Android还为路径绘制提供了PathEffect来定义绘制效果,PathEffect包含如下子类 ComposePathEffect CornerPathEffect DashPathEffect DiscretePathEffect Pat… Path类可以预先在View上将N个点连成一条路径,然后调用Canvas的drawPath(path,paint)即可沿着路径绘制图形 Android还为路径绘制提供了PathEffect来定义绘制效果,PathEffect包含如下子类 ComposePathEffect CornerPathEffect DashPathEffect DiscretePathEffect PathDashPathEffect SumPathEffect 下面的示例将会逐一使用上面的绘制效果 package WangLi.Graphics.PathTest; 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 { /** Called when the activity is first created. */ Override public void onCreate(Bundle savedInstanceState) { 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); //创建,并初始化Path path new Path(); path.moveTo(0, 0); for(int i 1; i 15; i) { //生成15个点,随机生成它们的坐标,并将它们连成一条Path path.lineTo(i*20, (float)Math.random()*60); } //初始化七个颜色 colors new int[] { Color.BLACK,Color.BLUE,Color.CYAN, Color.GREEN,Color.MAGENTA,Color.RED,Color.YELLOW }; } protected void onDraw(Canvas canvas) { //将背景填充成白色 canvas.drawColor(Color.WHITE); //-------下面开始初始化7中路径的效果 //使用路径效果 effects[0] null; //使用CornerPathEffect路径效果 effects[1] new CornerPathEffect(10); //初始化DiscretePathEffect effects[2] new DiscretePathEffect(3.0f,5.0f); //初始化DashPathEffect effects[3] new DashPathEffect(new float[]{20,10,5,10},phase); //初始化PathDashPathEffect Path p new Path(); p.addRect(0, 0, 8, 8, Path.Direction.CCW); effects[4] new PathDashPathEffect(p,12,phase,PathDashPathEffect.Style.ROTATE); //初始化PathDashPathEffect effects[5] new ComposePathEffect(effects[2],effects[4]); effects[6] new SumPathEffect(effects[4],effects[3]); //将画布移到8,8处开始绘制 canvas.translate(8, 8); //依次使用7中不同路径效果,7种不同的颜色来绘制路径 for(int i 0; i effects.length; i) { paint.setPathEffect(effects[i]); paint.setColor(colors[i]); canvas.drawPath(path, paint); canvas.translate(0, 60); } //改变phase值,形成动画效果 phase 1; invalidate(); } }
}
效果如下
