本文地址:http://blog.youkuaiyun.com/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。