Android使用自定义view在指定时间内匀速画一条直线的实例代码

本文讲述了Android使用自定义view在指定时间内匀速画一条直线的实例代码。分享给大家供大家参考，具体如下：

1.效果图：

2.自定义view实现

public class UniformLine extends View {
 private int x, y, nextX, nextY, incrementY, incrementX;
 public UniformLine(Context context) {
 super(context);
 }
 public UniformLine(Context context, int x, int y, int nextX, int nextY) {
 super(context);
 this.x = x;
 this.y = y;
 this.nextX = nextX;
 this.nextY = nextY;
 init();
 }
 private void init() {
 p = new Paint();
 p.setColor(Color.WHITE);
 p.setAntiAlias(true);
 p.setStrokeWidth(4.0f); 

 ValueAnimator valueAnimatorX = ValueAnimator.ofFloat(x, nextX);
 valueAnimatorX.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
  @Override
  public void onAnimationUpdate(ValueAnimator animation) {
  incrementX = Math.round((Float) animation.getAnimatedValue());
  invalidate();
  }
 });
 ValueAnimator valueAnimatorY = ValueAnimator.ofInt(y, nextY);
 valueAnimatorY.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
  @Override
  public void onAnimationUpdate(ValueAnimator animation) {
  incrementY = (int) animation.getAnimatedValue();
  invalidate();
  }
 });
 AnimatorSet animatorSet = new AnimatorSet();
 LinearInterpolator ll = new LinearInterpolator();
 animatorSet.setInterpolator(ll);//匀速
 animatorSet.setDuration(2000);
 animatorSet.playTogether(valueAnimatorX, valueAnimatorY);
 animatorSet.start();
 }
 Paint p;
 @Override
 protected void onDraw(Canvas canvas) {
 super.onDraw(canvas);
 canvas.drawLine(Util.Div(Math.round(x)), Util.Div(Math.round(y)),
  Util.Div(Math.round(incrementX)), Util.Div(Math.round(incrementY)), p);// 斜线
 }
}

3.调用

uniformLine = new UniformLine(mContext, 300, 500, 600, 200);
addView(uniformLine);

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对我们的支持。