跟随手指的小球

Crize_demo\draw_demo\src\main\java\com\ly\draw_demo\DrawView.java

 1 import android.content.Context; 2 import android.graphics.Canvas; 3 import android.graphics.Color; 4 import android.graphics.Paint; 5 import android.view.View; 6  7 public class DrawView extends View { 8  9   public float currentX = 40;10   public float currentY = 50;11 12   public DrawView(Context context) {13     super(context);14   }15 16   @Override17   protected void onDraw(Canvas canvas) {18     super.onDraw(canvas);19     //创建画笔20     Paint paint = new Paint();21     //设置画笔的颜色22     paint.setColor(Color.RED);23     //绘制一个小圆(作为小球)24     canvas.drawCircle(currentX,currentY,15,paint);25   }26 }

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原标题：跟随手指的小球

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