用画笔画了一个简单的箭头

MyView.java

package com.example.huangxingli.testpath;

import android.content.Context;
import android.graphics.Canvas;

import android.graphics.Paint;
import android.graphics.Path;

import android.util.AttributeSet;
import android.view.View;

/**
 * Created by huangxingli on 2015/4/3.
 */
public class MyView extends View {


    private Paint mPaint;
    public MyView(Context context) {
        super(context);
        mPaint = new Paint();
    }

    public MyView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mPaint=new Paint();
    }

    public MyView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mPaint=new Paint();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
       // canvas.translate(getPaddingLeft(), getPaddingTop() - getPaddingBottom());
        canvas.drawPath(makeArrow(), mPaint);
    }

    private static Path makeArrow() {
        Path path=new Path();
        path.moveTo(100,500);
        path.lineTo(300,500);
        path.lineTo(300,450);
        path.lineTo(473,550);
        path.lineTo(300,650);
        path.lineTo(300,600);
        path.lineTo(100,600);
        path.lineTo(100,500);
        path.close();
        return path;
    }
}