/**
* 回调监听
*/
private ScrollPaintCompleteListener listener;
/**
* 上一次滚动的Y值
*/
private int lastScrollY;
/**
* 构造方法
*/
public ScrollPaintView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
// 获取属性
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.ScrollPaintView);
mPaintIvHeight = (int) ta.getDimension(R.styleable.ScrollPaintView_paintScrollHeight, TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP, DEFAULT_PAINT_SCROLL_HEIGHT, getResources().getDisplayMetrics()));
mScrollSpeed = ta.getInteger(R.styleable.ScrollPaintView_scrollSpeed, DEFAULT_SCROLL_SPEED);
partitionNode = ta.getInteger(R.styleable.ScrollPaintView_scrollPartitionNode, DEFAULT_PARTITION_NODE);
mPaintScrollBp = drawableToBitamp(ta.getDrawable(R.styleable.ScrollPaintView_paintScrollSrc));
mPaintScrollTxt = ta.getString(R.styleable.ScrollPaintView_paintScrollTxt);
mPaintScrollTxtColor = ta.getColor(R.styleable.ScrollPaintView_paintScrollTxtColor, Color.BLACK);
mPaintScrollTxtSize = px2sp(ta.getDimensionPixelSize(R.styleable.ScrollPaintView_paintScrollTxtSize,
DEFAULT_PAINT_SCROLL_TXT_SIZE));
ta.recycle();
}
}
看一下创建画轴:
/**
* 创建滚轴
*/
private void makePaintScroll() {
// 如果已经存在,则不再创建
if (null != mPaintScrollImageView || null != mPaintScrollTextView) {
return;
}
// 创建滚轴
mPaintScrollImageView = new ImageView(getContext());
LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
lp.height = mPaintIvHeight;
mPaintScrollImageView.setLayoutParams(lp);
mPaintScrollImageView.setScaleType(ImageView.ScaleType.FIT_XY);
mPaintScrollImageView.setImageBitmap(null == mPaintScrollBp ? makeDefaultScroll() : mPaintScrollBp);
addView(mPaintScrollImageView);
// 创建文字
mPaintScrollTextView = new TextView(getContext());
LayoutParams lpt = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
lpt.height = mPaintIvHeight;
mPaintScrollTextView.setLayoutParams(lpt);
mPaintScrollTextView.setText(null == mPaintScrollTxt ? "" : mPaintScrollTxt);
mPaintScrollTextView.setTextSize(mPaintScrollTxtSize);
mPaintScrollTextView.setTextColor(mPaintScrollTxtColor);
mPaintScrollTextView.setGravity(Gravity.CENTER);
addView(mPaintScrollTextView);
}
/**
* 设置默认的滚轴
*
* @return
*/
private Bitmap makeDefaultScroll() {
Bitmap defaultBp = Bitmap.createBitmap(screenWidth, mPaintIvHeight,
Bitmap.Config.ARGB_8888);
//填充颜色
defaultBp.eraseColor(Color.parseColor("#FF0000"));
return defaultBp;
}
创建了一个画轴ImageView和一个文字TextView作为初始的画轴,如果没有传入画轴的图片,则默认去创建一个画轴.不难理解,
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