private void addNewItems() {
currentChildCount = getChildCount();
parentLayout = false;
int start = itemIds.size();
int end = Math.min(start + screenMaxColumns * rows * 2, adapter.getCount());
for (int i = start; i < end; i++) {
int left = (i / rows) * (itemWidth + spaceHori);
int top = (i % rows) * (spaceVert + itemHeight);
RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(itemWidth, itemHeight);
rlp.setMargins(left, top, 0, 0);
View child = adapter.getView(i, null, this);
this.addView(child, rlp);
int viewId = child.getId();
if (viewId == -1) {
viewId = TvUtil.buildId();
// 此处硬设置id同时建议开发者不用此范围id
}
child.setId(viewId);
itemIds.put(viewId, i);
bindEventOnChild(child, i);
layoutFlag = true;
}
colCount = itemIds.size() % rows == 0 ? itemIds.size() / rows : itemIds.size() / rows + 1;
}
private void initItems() {
// 避免冲突
if (getChildCount() > 0) {
return;
}
int screenWidth = wm.getDefaultDisplay().getWidth();
int initCols =
screenWidth % rowWidth == 0 ? screenWidth / rowWidth : screenWidth / rowWidth + 1;
int initLength = Math.min(adapter.getCount(), initCols * 2 * rows);
for (int i = 0; i < initLength; i++) {
int left = (i / rows) * (itemWidth + spaceHori);
int top = (i % rows) * (spaceVert + itemHeight);
RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(itemWidth, itemHeight);
if (initLength == 1) {
rlp.setMargins(left, top, 0, paddingTop * 2);
} else {
rlp.setMargins(left, top, 0, 0);
}
View child = adapter.getView(i, null, this);
this.addView(child, rlp);
int viewId = child.getId();
if (viewId == -1) {
viewId = TvUtil.buildId();
// 此处硬设置id同时建议开发者不用此范围id
}
child.setId(viewId);
itemIds.put(viewId, i);
bindEventOnChild(child, i);
layoutFlag = true;
}
colCount = itemIds.size() % rows == 0 ? itemIds.size() / rows : itemIds.size() / rows + 1;
cursor = new ImageView(getContext());
cursorId = TvUtil.buildId();
cursor.setId(cursorId);
cursor.setBackgroundResource(cursorRes);
this.addView(cursor);
cursor.setVisibility(View.INVISIBLE);
if (initFocus) {
View focus = ((ViewGroup) getParent()).findFocus();
if (focus == null) {
View item = getChildAt(0);
if (item != null) {
item.requestFocus();
}
}
}
}
/**
* 设置适配器
*
* @param adapter
*/
public void setAdapter(TvBaseAdapter adapter) {
this.adapter = adapter;
if (adapter != null) {
adapter.registerDataSetObservable(mDataSetObservable);
}
// 清理原先数据
clear();
if (isInit) {
initGridView();
isInit = false;
}
Message msg = handler.obtainMessage();
msg.what = ACTION_INIT_ITEMS;
handler.sendMessageDelayed(msg, DELAY);
}