android抽屉SlidingDrawer——wrap_content非全屏
16lz
2021-01-26
本文地址:http://blog.csdn.net/you_and_me12/article/details/7327030
SlidingDrawer的用法比较多,就不说明了。
如果设置了属性layout_height="wrap_content"是不起作用的,在原来的SlidingDrawer中的onMeasure()方法使得layout_height一直都是fill_parent,但是使用layout_height="固定高度"也是可以!
以下重写SlidingDrawer,实现如下效果图(右图效果):
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贴代码
/** * 使得SlidingDrawer在屏幕低端,而不会填满整个屏幕 * @author akai 2012-03-06 */public class WrapSlidingDrawer extends SlidingDrawer { private boolean mVertical; private int mTopOffset; public WrapSlidingDrawer(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); int orientation = attrs.getAttributeIntValue("android", "orientation", ORIENTATION_VERTICAL); mTopOffset = attrs.getAttributeIntValue("android", "topOffset", 0); mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL); } public WrapSlidingDrawer(Context context, AttributeSet attrs) { super(context, attrs); int orientation = attrs.getAttributeIntValue("android", "orientation", ORIENTATION_VERTICAL); mTopOffset = attrs.getAttributeIntValue("android", "topOffset", 0); mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec); int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec); int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); final View handle = getHandle(); final View content = getContent(); measureChild(handle, widthMeasureSpec, heightMeasureSpec); if (mVertical) { int height = heightSpecSize - handle.getMeasuredHeight() - mTopOffset; content.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(height, heightSpecMode)); heightSpecSize = handle.getMeasuredHeight() + mTopOffset + content.getMeasuredHeight(); widthSpecSize = content.getMeasuredWidth(); if (handle.getMeasuredWidth() > widthSpecSize) widthSpecSize = handle.getMeasuredWidth(); } else { int width = widthSpecSize - handle.getMeasuredWidth() - mTopOffset; getContent().measure(MeasureSpec.makeMeasureSpec(width, widthSpecMode), heightMeasureSpec); widthSpecSize = handle.getMeasuredWidth() + mTopOffset + content.getMeasuredWidth(); heightSpecSize = content.getMeasuredHeight(); if (handle.getMeasuredHeight() > heightSpecSize) heightSpecSize = handle.getMeasuredHeight(); } setMeasuredDimension(widthSpecSize, heightSpecSize); }}
注释:本代码可以直接使用,不需修改,使用是把原来的<SlidingDrawer>标签修改为<packageName.WrapSlidingDrawer>即可。
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