Android自定义之流式布局(android自定义控件入门与实战)

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流式布局，好处就是父类布局可以自动的判断子孩子是不是需要换行，什么时候需要换行，可以做到网页版的标签的效果。今天就是简单的做了自定义的流式布局。

具体效果：原理：其实很简单，Measure Layout。只需要这两个步骤就可以搞定了。完全的手动去Measure Layout。我们看一下代码。解释就在代码里面做注释了，因为使用为知笔记写的博客，&#;式不符合代码&#;式。大家可以看具体的源码。最后又源码下载地址。1.Measure 测量 @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int widthSize = MeasureSpec.getSize(widthMeasureSpec); int widthMode = MeasureSpec.getMode(widthMeasureSpec); int heightSize = MeasureSpec.getSize(heightMeasureSpec); int heightMode = MeasureSpec.getMode(heightMeasureSpec); int lineHeight = 0 ; int lineWidth = 0 ; int width = 0 ; int height = 0 ; int childCount = getChildCount(); Log.i("Test", getPaddingLeft() &#; "==right=" &#;getPaddingRight()); for (int i = 0; i < childCount; i&#;&#;) { View childView = getChildAt(i); measureChild(childView, widthMeasureSpec, heightMeasureSpec); MarginLayoutParams params = (MarginLayoutParams) childView.getLayoutParams(); int childWidth = childView.getMeasuredWidth() &#; params.leftMargin &#; params.rightMargin ; int childHeight = childView.getMeasuredHeight() &#; params.topMargin &#; params.bottomMargin ; if ((lineWidth &#; childWidth ) > widthSize - getPaddingLeft() - getPaddingRight() ) { width = Math.max(width, lineWidth); lineWidth = childWidth ; height &#;= lineHeight ; lineHeight = childHeight; }else { lineWidth &#;= childWidth ; lineHeight = Math.max(lineHeight, childHeight); } if (i == childCount-1) { width = Math.max(width, lineWidth); height &#;= lineHeight ; } } height &#;= getPaddingTop() &#; getPaddingBottom() ; setMeasuredDimension(widthMode == MeasureSpec.EXACTLY?widthSize:width, heightMode == MeasureSpec.EXACTLY?heightSize:height); }2.onLayout 布局 @Override protected void onLayout(boolean a, int l, int t, int r, int b) { childViewList.clear(); int childCount = getChildCount() ; int width = getWidth(); int lineWidth = 0 ; int lineHeight = 0 ; List<View> lineViews = new ArrayList<View>(); for (int i = 0; i < childCount; i&#;&#;) { View childView = getChildAt(i); MarginLayoutParams params = (MarginLayoutParams) childView.getLayoutParams(); int childWidth = childView.getMeasuredWidth() &#; params.leftMargin &#; params.rightMargin ; int childHeight = childView.getMeasuredHeight() &#; params.topMargin &#; params.bottomMargin ; if (lineWidth &#; childWidth > width - getPaddingLeft() - getPaddingRight()) { childViewList.add(lineViews); lineViews = new ArrayList<View>(); if (i == 0 ) { lineHeight &#;= getPaddingTop() ; }else if (i== childCount - 1) { lineHeight &#;= getPaddingBottom() ; } this.lineHeight.add(lineHeight); lineHeight = 0 ; lineWidth = 0 ; } lineWidth &#;= childWidth; lineHeight = Math.max(lineHeight, childHeight) ; lineViews.add(childView); } childViewList.add(lineViews); this.lineHeight.add(lineHeight); int left = getPaddingLeft() ; int top = getPaddingTop(); for (int i = 0; i < childViewList.size(); i&#;&#;) { lineViews = childViewList.get(i); for (int j = 0; j < lineViews.size(); j&#;&#;) { View childView = lineViews.get(j); MarginLayoutParams params = (MarginLayoutParams) childView.getLayoutParams(); int lc = left &#; params.leftMargin ; int tc = top &#; params.topMargin ; int rc = lc &#; childView.getMeasuredWidth() ; int bc = tc &#; childView.getMeasuredHeight() ; childView.layout(lc,tc,rc,bc); left &#;= params.leftMargin &#; childView.getMeasuredWidth() &#; params.rightMargin ; } left = getPaddingLeft() ; top &#;= this.lineHeight.get(i) ; } }代码下载地址：百度网盘：

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android开发步步为营之:解决ScrollView和ListView触摸事件onInterceptTouchEvent相互冲突问题最近项目里面有个需求，一个页面放了一个ScrollView，整个页面可以向上滚动，然后ScrollView里面又嵌套了一个ListView，ListView里面的数据也是可以上下滑

Android开源SlidingMenu的使用 SlidingMenu是Android上的一个侧滑菜单，如下图所示：今天主要记录的是SlidingMenu的使用，我们可以从Github上下载该开源项目，下载地址是：