Android自定view画圆效果
作者:sunzhi_
这篇文章主要为大家详细介绍了Android自定view画圆效果,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
这是一个自定义view画圆,对于初学自定义view的小伙伴这是一个很好的帮助。
看图
代码:
package sjx.com.custonview; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.support.annotation.Nullable; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.Window; /** * dell 孙劲雄 * 2017/9/1 * 19:57 */ public class Custonm extends View { private float currentX = 40; private float currentY = 50; public Custonm(Context context) { super(context); } public Custonm(Context context, AttributeSet attrs) { super(context, attrs); } public Custonm(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } //测量 @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); } //摆放 @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { super.onLayout(changed, left, top, right, bottom); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); Paint paint=new Paint(); paint.setColor(Color.RED); paint.setStyle(Paint.Style.FILL); paint.setAntiAlias(true); canvas.drawCircle(currentX,currentY,30,paint); } @Override public boolean dispatchTouchEvent(MotionEvent event) { return super.dispatchTouchEvent(event); } @Override public boolean onTouchEvent(MotionEvent event) { currentX=event.getX(); currentY=event.getY(); invalidate(); switch (event.getAction()){ case MotionEvent.ACTION_DOWN: Log.i("sss", "按下"); break; case MotionEvent.ACTION_MOVE: Log.i("sss", "移动"); break; case MotionEvent.ACTION_UP: Log.i("sss", "弹起"); break; } return true; } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。