Android中Path的运用

利用Path可以画出各种复杂的二维图形，写了一个简单的例子，效果如下：

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程序目录结构：

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其中MainActivity代码如下：

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public class MainActivity extends Activity {     /** Called when the activity is first created. */     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(new MyLayout(this));      }    }

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利用自定义的MyLayout填充Activity。MyLayout代码如下：

public class MyLayout extends LinearLayout {    public MyLayout(Context context) {         super(context);         // TODO Auto-generated constructor stub     }    protected void dispatchDraw(Canvas canvas) {        super.dispatchDraw(canvas);         Log.v("tag", ">>>>>>>>>>>>>>>>>>>>>>");         Path mPath = new Path();         mPath.moveTo(20, 150);         mPath.lineTo(60, 200);         mPath.lineTo(100, 350);         mPath.lineTo(200, 60);         mPath.lineTo(140, 160);         mPath.close();        Paint paint = new Paint();        canvas.drawColor(Color.WHITE);        paint.setAntiAlias(true);         paint.setColor(Color.BLACK);         paint.setStyle(Paint.Style.STROKE);        // 画布上用指定画笔绘出路径         canvas.drawPath(mPath, paint);    }}

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其中：

Path mPath = new Path();         mPath.moveTo(20, 150);         mPath.lineTo(60, 200);         mPath.lineTo(100, 350);         mPath.lineTo(200, 60);         mPath.lineTo(140, 160);         mPath.close();

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path用来描述画笔的路径，close方法表示将最后的点和起点封闭起来。

paint.setAntiAlias(true); paint.setColor(Color.BLACK); paint.setStyle(Paint.Style.STROKE);

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定义画笔的类型和风格。

原文地址：http://www.apkbus.com/forum.php?mod=viewthread&tid=18630

本文地址：http://bajiewuneng.iteye.com/blog/1919505