技术转载：android抽屉SlidingDrawer——wrap_content非全屏

转自：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)：

 

                                                                                

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。