背景
我想要切换我的选择“应用程序管理器”的应用程序从ActionBarSherlock库的支持库谷歌已经创建的,因为它获得了更多的更新(ActionBarSherlock不再被开发,链接在这里 ),我认为它应该涵盖了很多功能。
问题
一切顺利的话(或者看起来是这样),除了在ActionBarSherlock名为ICSLinearLayout类我用来显示上分隔,现在被称为LinearLayoutICS。
它只是不显示分隔:
注意:您之前问“你为什么不只是使用一个GridView?”, 这里的原因,也是这个 ,如果我曾经想添加标题。
代码
该代码是差不多的,因为我已经用了ActionBarSherlock:
rowLayout=new LinearLayoutICS(_context,null);
rowLayout.setMeasureWithLargestChildEnabled(true);
rowLayout.setShowDividers(LinearLayout.SHOW_DIVIDER_MIDDLE);
rowLayout.setDividerDrawable(_context.getResources().getDrawable(R.drawable.list_divider_holo_dark));
rowLayout.setOrientation(LinearLayout.HORIZONTAL);
... // add views, layout params, etc...
问题
我如何使用这个类,以支持在支持库的所有支持的操作系统版本显示分隔?
什么是错的,我写的代码?
OK,似乎setShowDividers和setDividerDrawable不能使用,因为LinearLayoutICS没有他们。
不仅如此,但它正在使用皮棉没有提醒我。
所以,我结束了与被复制LinearLayoutICS代码(从这里 ,希望它的最新版本)和一些原始的LinearLayout代码,使一些没有工作。 我希望这不会有任何错误。
万岁开源... :)
可悲的是setMeasureWithLargestChildEnabled不适用于旧的API,所以我觉得ActionBarSherlock方式仍的情况下,这就是你希望使用更好的东西。
编辑:setMeasureWithLargestChildEnabled方法不上ActionBarSherlock工作。
下面的代码,对于那些谁希望使用。 我希望未来的图书馆被更新的时候,我会记得再次检查这个问题。
public class LinearLayoutICS extends LinearLayout
{
private Drawable mDivider;
private int mDividerWidth,mDividerHeight;
private int mShowDividers;
private int mDividerPadding;
public LinearLayoutICS(final Context context,final AttributeSet attrs)
{
super(context,attrs);
// the R is from "android.support.v7.appcompat.R" .
final TypedArray a=context.obtainStyledAttributes(attrs,R.styleable.LinearLayoutICS);
mDivider=a.getDrawable(R.styleable.LinearLayoutICS_divider);
if(mDivider!=null)
{
mDividerWidth=mDivider.getIntrinsicWidth();
mDividerHeight=mDivider.getIntrinsicHeight();
}
else mDividerHeight=mDividerWidth=0;
mShowDividers=a.getInt(R.styleable.LinearLayoutICS_showDividers,SHOW_DIVIDER_NONE);
mDividerPadding=a.getDimensionPixelSize(R.styleable.LinearLayoutICS_dividerPadding,0);
a.recycle();
setWillNotDraw(mDivider==null);
}
@Override
protected void onDraw(final Canvas canvas)
{
if(getOrientation()==VERTICAL)
drawDividersVertical(canvas);
else drawDividersHorizontal(canvas);
}
@Override
protected void measureChildWithMargins(final View child,final int parentWidthMeasureSpec,final int widthUsed,final int parentHeightMeasureSpec,final int heightUsed)
{
if(mDivider!=null)
{
final int childIndex=indexOfChild(child);
final int count=getChildCount();
final LayoutParams params=(LayoutParams)child.getLayoutParams();
// To display the dividers in-between the child views, we modify their margins
// to create space.
if(getOrientation()==VERTICAL)
{
if(hasDividerBeforeChildAt(childIndex))
params.topMargin=mDividerHeight;
else if(childIndex==count-1&&hasDividerBeforeChildAt(count))
params.bottomMargin=mDividerHeight;
}
else if(hasDividerBeforeChildAt(childIndex))
params.leftMargin=mDividerWidth;
else if(childIndex==count-1&&hasDividerBeforeChildAt(count))
params.rightMargin=mDividerWidth;
}
super.measureChildWithMargins(child,parentWidthMeasureSpec,widthUsed,parentHeightMeasureSpec,heightUsed);
}
void drawDividersVertical(final Canvas canvas)
{
final int count=getChildCount();
for(int i=0;i<count;i++)
{
final View child=getChildAt(i);
if(child!=null&&child.getVisibility()!=GONE&&hasDividerBeforeChildAt(i))
{
final LayoutParams lp=(LayoutParams)child.getLayoutParams();
drawHorizontalDivider(canvas,child.getTop()-lp.topMargin);
}
}
if(hasDividerBeforeChildAt(count))
{
final View child=getChildAt(count-1);
int bottom=0;
if(child==null)
bottom=getHeight()-getPaddingBottom()-mDividerHeight;
else bottom=child.getBottom();
drawHorizontalDivider(canvas,bottom);
}
}
void drawDividersHorizontal(final Canvas canvas)
{
final int count=getChildCount();
for(int i=0;i<count;i++)
{
final View child=getChildAt(i);
if(child!=null&&child.getVisibility()!=GONE&&hasDividerBeforeChildAt(i))
{
final LayoutParams lp=(LayoutParams)child.getLayoutParams();
drawVerticalDivider(canvas,child.getLeft()-lp.leftMargin);
}
}
if(hasDividerBeforeChildAt(count))
{
final View child=getChildAt(count-1);
int right=0;
if(child==null)
right=getWidth()-getPaddingRight()-mDividerWidth;
else right=child.getRight();
drawVerticalDivider(canvas,right);
}
}
void drawHorizontalDivider(final Canvas canvas,final int top)
{
mDivider.setBounds(getPaddingLeft()+mDividerPadding,top,getWidth()-getPaddingRight()-mDividerPadding,top+mDividerHeight);
mDivider.draw(canvas);
}
void drawVerticalDivider(final Canvas canvas,final int left)
{
mDivider.setBounds(left,getPaddingTop()+mDividerPadding,left+mDividerWidth,getHeight()-getPaddingBottom()-mDividerPadding);
mDivider.draw(canvas);
}
/**
* Determines where to position dividers between children.
*
* @param childIndex Index of child to check for preceding divider
* @return true if there should be a divider before the child at childIndex
* @hide Pending API consideration. Currently only used internally by the system.
*/
protected boolean hasDividerBeforeChildAt(final int childIndex)
{
if(childIndex==0)
return (mShowDividers&SHOW_DIVIDER_BEGINNING)!=0;
else if(childIndex==getChildCount())
return (mShowDividers&SHOW_DIVIDER_END)!=0;
else if((mShowDividers&SHOW_DIVIDER_MIDDLE)!=0)
{
boolean hasVisibleViewBefore=false;
for(int i=childIndex-1;i>=0;i--)
if(getChildAt(i).getVisibility()!=GONE)
{
hasVisibleViewBefore=true;
break;
}
return hasVisibleViewBefore;
}
return false;
}
@Override
public int getDividerPadding()
{
return mDividerPadding;
}
@Override
public void setDividerPadding(final int dividerPadding)
{
mDividerPadding=dividerPadding;
}
@Override
public void setShowDividers(final int showDividers)
{
if(mShowDividers!=showDividers)
requestLayout();
mShowDividers=showDividers;
}
@Override
public void setDividerDrawable(final Drawable divider)
{
if(divider==mDivider)
return;
mDivider=divider;
if(divider!=null)
{
mDividerWidth=divider.getIntrinsicWidth();
mDividerHeight=divider.getIntrinsicHeight();
}
else
{
mDividerWidth=0;
mDividerHeight=0;
}
setWillNotDraw(divider==null);
requestLayout();
}
@Override
public Drawable getDividerDrawable()
{
return mDivider;
}
}