Android--根据子控件的大小自动换行的ViewGroup，android--viewgroup

Android--根据子控件的大小自动换行的ViewGroup，android--viewgroup

1、自定义ViewGroup

  1 /**
  2  * Created by Administrator on 2016/2/26.
  3  *
  4  * --------自动换行的ViewGroup-----------
  5  */
  6 public class LineWrapLayout extends ViewGroup {
  7     private static final boolean DEBUG = true;
  8     private static final String TAG = "AutoLineFeedLayout";
  9 
 10     /**
 11      * 左间距
 12      */
 13     private int paddingLeft = 10;
 14     /**
 15      * 右间距
 16      */
 17     private int paddingRight = 10;
 18     /**
 19      *
 20      */
 21     private int paddingTop = 10;
 22     /**
 23      *
 24      */
 25     private int paddingBottom = 10;
 26 
 27     /**
 28      * 水平方向间距
 29      */
 30     private int horizontalSpace = 10;
 31     /**
 32      * 行间距
 33      */
 34     private int verticalSpace = 5;
 35 
 36 
 37     private List<Integer> listX;
 38     private List<Integer> listY;
 39 
 40     public LineWrapLayout(Context context) {
 41         super(context);
 42 
 43     }
 44     public LineWrapLayout(Context context, AttributeSet attrs) {
 45         super(context, attrs);
 46         init(attrs);
 47     }
 48 
 49     public LineWrapLayout(Context context, AttributeSet attrs, int defStyle) {
 50         super(context, attrs, defStyle);
 51         init(attrs);
 52     }
 53 
 54 
 55     @Override
 56     protected void onLayout(boolean changed, int l, int t, int r, int b) {
 57         if(DEBUG) Log.d(TAG, "--- onLayout changed :" + changed + " l :" + l + ",t :" + t + ",r :" + r + ",b :" + b);
 58         int count = getChildCount();
 59         int width = getWidth();
 60         Log.i(TAG, "宽度 :"+width);
 61 
 62 
 63         int startOffsetX = paddingLeft;// 横坐标开始
 64         int startOffsety = 0;//纵坐标开始
 65         int rowCount = 1;
 66 
 67         int preEndOffsetX = startOffsetX;
 68 
 69         for (int i = 0; i < count; i++) {
 70             final View childView = getChildAt(i);
 71 
 72             int w = childView.getMeasuredWidth();
 73             int h = childView.getMeasuredHeight();
 74 
 75             int x = listX.get(i);
 76             int y = listY.get(i);
 77 
 78             // 布局子控件
 79             childView.layout(x, y, x + w, y + h);
 80         }
 81     }
 82     @Override
 83     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 84         if(DEBUG) Log.v(TAG, "--- onMeasure()");
 85 
 86         int count = getChildCount();
 87         int width = measureWidth(widthMeasureSpec);
 88         Log.i(TAG, "宽度 :"+width);
 89 
 90 
 91         int startOffsetX = paddingLeft;// 横坐标开始
 92         int startOffsety = 0+paddingTop;//纵坐标开始
 93         int rowCount = 1;
 94 
 95         int preEndOffsetX = startOffsetX;
 96 
 97         listX.clear();
 98         listY.clear();
 99         for (int i = 0; i < count; i++) {
100             Log.v(TAG, "----");
101             final View childView = getChildAt(i);
102             // 设置子空间Child的宽高
103             childView.measure(0,0);
104             /* 获取子控件Child的宽高 */
105             int childWidth = childView.getMeasuredWidth();
106             int childHeight = childView.getMeasuredHeight();
107             Log.v(TAG, "childWidth :"+childWidth+" childHeight :"+childHeight);
108             preEndOffsetX = startOffsetX + childWidth /*+ CHILD_MARGIN*/;
109             //TODO [yaojian]margin属性？
110             if (preEndOffsetX > width - paddingRight ) {
111                 if (startOffsetX > paddingLeft) {
112                     /* 换行  */
113                     startOffsetX = paddingLeft;
114                     startOffsety += childHeight+verticalSpace;
115                     rowCount++;
116                 }
117             }
118             Log.d(TAG, "measure child :"+startOffsetX+", "+startOffsety+", "+preEndOffsetX+", "+(startOffsety+childHeight));
119             listX.add(startOffsetX);
120             listY.