GridView实现

layoutChildrenView(){
int childrenCount = listData.size();

int singleWidth = (totalWidth - gap * (3 - 1)) / 3;
int singleHeight = singleWidth;

//根据子视图数量上限
ViewGroup.LayoutParams params = getLayoutParams();
params.height = singleHeight * rows + gap * (rows - 1);
setLayoutParams(params);

for (int i = 0; i < childrenCount; i++) {
CustomImageView childrenView = (CustomImageView) getChildAt(i);
childrenView.setImageUrl(((Image) listData.get(i)).getUrl());
int[] position = findPosition(i);
int left = (singleWidth + gap) * position[1];
int top = (singleHeight + gap) * position[0];
int right = left + singleWidth;
int 底部 = 顶部 + singleHeight;

childrenView.layout(左、上、右、下);
}public void setImagesData(List<Image> 列表) {
if (lists == null ||lists.isEmpty()) {
返回;
}
//初始化布置
generateChildrenLayout(lists.size());
//这里做1个重用view的处理
if (listData == null) {
int i = 0;
而 (i < 列表.大小()) {
CustomImageView iv = generateImageView();
addView(iv,generateDefaultLayoutParams());
我++;
}
} 别的 {
int oldViewCount = listData.size();
int newViewCount = list.size();
如果 (oldViewCount > newViewCount) {
removeViews(newViewCount - 1, oldViewCount - newViewCount);
} else if (oldViewCount < newViewCount) {
for (int i = 0; i < newViewCount - oldViewCount; i++) {
CustomImageView iv = generateImageView();
addView(iv,generateDefaultLayoutParams());
}
}
}
listData = 列表；
layoutChildrenView();

1. 包 com.weixinninegridlayout;
3. 导入 android.content.Context;
4. 导入 android.graphics.Color;
5. 导入 android.graphics.drawable.ColorDrawable;
6. 导入 android.util.AttributeSet;
7. 导入 android.view.View;
8. 导入 android.view.ViewGroup;
9. 导入 android.widget.ImageView;
11. 导入 java.util.List;
14. /**
15. * 由 Pan_ 于 2015/2/2 创建。
16. */
17. 公共类 NineGridlayout 扩展 ViewGroup {
19.     /**
20.      * 图片之间的间隔
21.      */
22.     私人 int 差距 = 5;
23.     私有整数列；//
24.     私有整数行；//
25.     私人列表列表数据；
26.     私有整数总宽度；
28.     公共 NineGridlayout（上下文上下文）{
29.         超级（上下文）；
30.     }
32.     公共 NineGridlayout（上下文上下文，AttributeSet attrs）{
33.         超级（上下文，属性）；
34.         ScreenTools screenTools=ScreenTools.instance(getContext());
35.         totalWidth=screenTools.getScreenWidth()-screenTools.dip2px(80);
36.     }
38.     @覆盖
39.     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
40.         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
41.     }
43.     @覆盖
44.     protected void onLayout(boolean 改变，int l，int t，int r，int b) {
46.     }
47.     私有无效 layoutChildrenView(){
48.         int childrenCount = listData.size();
50.         int singleWidth = (totalWidth - gap * (3 - 1)) / 3;
51.         int singleHeight = singleWidth;
53.         //根据子视图数量上限
54.         ViewGroup.LayoutParams params = getLayoutParams();
55.         params.height = singleHeight * rows + gap * (rows - 1);
56.         setLayoutParams(params);
58.         for (int i = 0; i < childrenCount; i++) {
59.             CustomImageView childrenView = (CustomImageView) getChildAt(i);
60.             childrenView.setImageUrl(((Image) listData.get(i)).getUrl());
61.             int[] position = findPosition(i);