@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int widthmode = MeasureSpec.getMode(widthMeasureSpec);
int widthsize = MeasureSpec.getSize(widthMeasureSpec);
int heightmode = MeasureSpec.getMode(heightMeasureSpec);
int heightsize = MeasureSpec.getSize(heightMeasureSpec);
if (widthmode == MeasureSpec.AT_MOST && heightmode == MeasureSpec.AT_MOST) {
setMeasuredDimension(
(int) mTextSize * text.length() + getPaddingLeft() + getPaddingRight(),
(int) mTextSize
+ getPaddingTop()
+ getPaddingBottom()
+ DensityUtil.px2dip(mContext, 300));
} else if (widthmode == MeasureSpec.AT_MOST) {
setMeasuredDimension(
(int) mTextSize * text.length() + getPaddingLeft() + getPaddingRight(), heightsize);
} else if (heightmode == MeasureSpec.AT_MOST) {
setMeasuredDimension(
widthsize,
(int) mTextSize
+ getPaddingTop()
+ getPaddingBottom()
+ DensityUtil.px2dip(mContext, 300));
}
}
private void PlayAnimator() {
if (i < text.length()) {
mPath.moveTo(0, 0); // 起点
mPath.quadTo(
(mTextSize * i) / 2, 0, mTextSize * i, mTextSize + DensityUtil.px2dip(mContext, 300));
mPathMeasure = new PathMeasure(mPath, false);
animator = ValueAnimator.ofFloat(0, mPathMeasure.getLength());
animator.addUpdateListener(
new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
float value = (Float) animation.getAnimatedValue();
mPathMeasure.getPosTan(value, mCurrentPosition, null);
postInvalidate();
}
});
mPath.close();
animator.setDuration(1500);
animator.setRepeatMode(ValueAnimator.RESTART);
animator.setInterpolator(new LinearInterpolator());
animator.start();
animator.addListener(
new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animator) {}
@Override
public void onAnimationEnd(Animator animator) {
// 每一个动画执行完成后记录最后一个坐标点
Point point = new Point();
point.x = (int) mCurrentPosition[0];
point.y = (int) mCurrentPosition[1];
endloc.put(i, point);
i++;
if (i >= text.length()) { // 当i大于7的时候置为零方便下次循环
i = 0;
endloc.clear(); // 清空集合，从新来过
}
mPath.reset();
PlayAnimator();
}
@Override
public void onAnimationCancel(Animator animator) {}
@Override
public void onAnimationRepeat(Animator animator) {}
});
}
}
public ParabolicTextView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContext = context.getApplicationContext();
TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.JumpTextView);
color = typedArray.getColor(R.styleable.JumpTextView_textColor, Color.BLACK);
text = typedArray.getString(R.styleable.JumpTextView_text);
if (text == null) {
text = "Hello word";
}
mTextSize = typedArray.getFloat(R.styleable.JumpTextView_textSize, 40);
mTextSize = DensityUtil.px2dip(mContext, mTextSize);
typedArray.recycle();
init();
}