一、需求是这样的：滑动到哪一页就在家一页的数据，避免预加载二、由于使用setOffScreenLimit无效解决办法：
<span style="color:#ff6666;">注意：setUserVisibleHint，使用这个方法来完成切换到哪一页才加载哪一页</span>/**
*
*
* @author Administrator
*
*/
public class GestateKnowledgeBabyTabFragment extends TabBaseFragment implements LmbRequestCallBack {
/** tab对应的帮的数据源 */
private GestateBabyDataItem babyDataItem;
/** tab对应帮分类Id */
private int babyTabId;
/** 缓存当前fragment显示的view，用以当销毁view但fragment没销毁时的回复 */
private View cacheFragmentView;
/** 当前fragment是否是可见的 */
private boolean isFragmentVisible;
/** 是否已经加载了view,若已经加载了，不会再执行 */
private boolean isPrepared;
/**
*
* @Description :
* @author:zhongwr
* @param :babyTabId tab对应的id,不能为空
* @param :categoryBangList 如果不为空则数据已经加载过，不用再次请求，如果为空，表示数据没请求过，则请求网络获取数据
* @return :void
*/
public static GestateKnowledgeBabyTabFragment newInstance(int babyTabId, GestateBabyDataItem babyDataItem) {
GestateKnowledgeBabyTabFragment bangFragment = new GestateKnowledgeBabyTabFragment();
Bundle argsBundle = new Bundle();
argsBundle.putInt("babyTabId", babyTabId);
argsBundle.putSerializable("babyDataItem", babyDataItem);
bangFragment.setArguments(argsBundle);
return bangFragment;
}
/**
* isVisibleToUser:true:表示该UI可以被当前用户可见;false:表示不可见 是在oncreateView之前执行
*
*<span style="color:#ff0000;"> 执行顺序，用于预加载时，不会执行，第二次执行可见时，由于不会执行oncreateView，所以用此来加载第二次获取 setUserVisibleHint false--setUserVisibleHint
* true--onAttach--onCreate--onCreateView--onActivityCreated--onResume()</span>
*/
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
// 直接使用isVisibleToUser不准确
isFragmentVisible = getUserVisibleHint();
// 第一次加载fragment(由于是viewpager可能是预加载，导致isFragmentVisible=false不可见)并执行此方法时，
// mactivity==null,当滑动选中，此时activity已经赋值，并且isFragmentVisible=true,再次执行这方法时不会执行oncreateView
if (null != activity && isFragmentVisible && !isPrepared) {
onCreateContentView(LayoutInflater.from(activity), null);
}
}
@Override
public View onCreateViewComplete(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Logcat.dLog("isFragmentVisible = " + isFragmentVisible);
Logcat.dLog("babyTabId = " + babyTabId);
if (null == cacheFragmentView && isFragmentVisible) {
isPrepared = true;
View view = cacheFragmentView = inflater.inflate(R.layout.gestate_baby_knowledge_fragment, null);
activity = getActivity();
initView(view);
initListener();
initData();
}
return cacheFragmentView;
}
private void initView(View view) {
}
/**
*
* @description 更新数据
* @author zhongwr
* @update 2015-11-28 下午6:17:49
*/
private void updateViewData(GestateBabyDataItem babyDataItem) {
if (null != babyDataItem) {
setClickToReloadGone();
if (null != babyDataItem.bbchange_data && !Tools.isEmpty(babyDataItem.bbchange_data.title)) {
llBabyChangeParent.setVisibility(View.VISIBLE);
tvBabyChangeContent.setText(babyDataItem.bbchange_data.text);
tvBabyChangeTitle.setText(babyDataItem.bbchange_data.title);
} else {
llBabyChangeParent.setVisibility(View.GONE);
}
// 营养提醒
if (null != babyDataItem.nutrition_data && !Tools.isEmpty(babyDataItem.nutrition_data.title)) {
llNutritionParent.setVisibility(View.VISIBLE);
tvNutritionContent.setText(babyDataItem.nutrition_data.text);
tvNutritionTitle.setText(babyDataItem.nutrition_data.title);
} else {
llNutritionParent.setVisibility(View.GONE);
}
if (null != babyDataItem.early_data && !Tools.isEmpty(babyDataItem.early_data.title)) {
llEarlyParent.setVisibility(View.VISIBLE);
tvEarlyContent.setText(Html.fromHtml(babyDataItem.early_data.text));
tvEarlyTitle.setText(babyDataItem.early_data.title);
setViewOnClickListener(llEarlyParent, babyDataItem.early_data.id);
} else {
llEarlyParent.setVisibility(View.GONE);
}
if (null != babyDataItem.month_data && !Tools.isEmpty(babyDataItem.month_data.title)) {
llConfinementParent.setVisibility(View.VISIBLE);
tvConfinementTitle.setText(babyDataItem.month_data.title);
tvConfinementContentTitle.setText(babyDataItem.month_data.small_title);
tvConfinementContent.setText(Html.fromHtml(babyDataItem.month_data.text));
imageLoader.displayImage(babyDataItem.month_data.pic, ivConfinementHeadPic, options565);
setViewOnClickListener(llConfinementParent, babyDataItem.month_data.id);
} else {
llConfinementParent.setVisibility(View.GONE);
}
// 推荐阅读
if (null != babyDataItem.tuijian_data && !Tools.isEmpty(babyDataItem.tuijian_data.title)) {
llRecommendedParent.setVisibility(View.VISIBLE);
tvRecommendedTitle.setText(babyDataItem.tuijian_data.title);
tvRecommendedContentTitle.setText(babyDataItem.tuijian_data.small_title);
tvRecommendedContent.setText(Html.fromHtml(babyDataItem.tuijian_data.text));
setBigImageView(babyDataItem.tuijian_data.pic, ivRecommendedPic);
setViewOnClickListener(llRecommendedParent, babyDataItem.tuijian_data.id);
} else {
llRecommendedParent.setVisibility(View.GONE);
}
if (null != babyDataItem.expert_data && !Tools.isEmpty(babyDataItem.expert_data.title)) {
llExpertParent.setVisibility(View.VISIBLE);
tvExpertTitle.setText(babyDataItem.expert_data.title);
tvExpertContentTitle.setText(babyDataItem.expert_data.small_title);
tvExpertContent.setText(babyDataItem.expert_data.text);
imageLoader.displayImage(babyDataItem.expert_data.pic, ivExpertHeadPic, options565);
setViewOnClickListener(llExpertParent, babyDataItem.expert_data.id);
} else {
llExpertParent.setVisibility(View.GONE);
}
if (null != babyDataItem.expert_video_data && !Tools.isEmpty(babyDataItem.expert_video_data.title)) {
llVideoParent.setVisibility(View.VISIBLE);
tvVideoTitle.setText(babyDataItem.expert_video_data.title);
tvVideoContent.setText(babyDataItem.expert_video_data.small_title);
setBigImageView(babyDataItem.expert_video_data.pic, ivVideoPic);
setViewOnClickListener(ivVideoPlay, babyDataItem.expert_video_data.id);
} else {
llVideoParent.setVisibility(View.GONE);
}
addTagView(babyDataItem.tag_data, flowLayoutTag);
} else {
setLoadDataEmpty();
}
}
/***
*
* @description
* @author zhongwr
* @update 2015-11-30 下午6:09:53
*/
private void setViewOnClickListener(View view, final String id) {
view.setTag(id);
view.setOnClickListener(clickViewJumpListener);
}
private OnClickListener clickViewJumpListener = new OnClickListener() {
@Override
public void onClick(View v) {
String id = (String) v.getTag();
}
};
/**
*
* @description 设置tag标签
* @author zhongwr
* @update 2015-11-12 下午6:18:07
*/
private void addTagView(GestateBabyTagContainerItem containerItem, FlowLayout flowLayoutTag) {
if (null == containerItem || Tools.isEmpty(containerItem.title) || Tools.isListEmpty(containerItem.list)) {
llTagParent.setVisibility(View.GONE);
return;
}
List<GestateBabyTagItem> tagList = containerItem.list;
flowLayoutTag.removeAllViews();
llTagParent.setVisibility(View.VISIBLE);
tvTagTitle.setText(containerItem.title);
TextView bt = null;
int padding = Tools.dip2px(activity, 12);
GestateBabyTagItem tagItem;
for (int i = 0; i < tagList.size(); i++) {
tagItem = tagList.get(i);
bt = new TextView(activity);
bt.setText(tagItem.small_title != null ? tagItem.small_title : "未知");
bt.setTextColor(getResources().getColor(R.color.red1));
bt.setGravity(Gravity.CENTER);
bt.setBackgroundResource(R.drawable.preg_tag_bg);
bt.setTextSize(13);
bt.setPadding(padding, 0, padding, 0);
bt.setTag(tagItem);
final String tagId = tagItem.id;
final String title = tagItem.small_title;
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
KnowledgeLabelDetailActivity.startKnowledgeLabelDetailAct(activity, tagId, title, "1", null);
}
});
flowLayoutTag.addView(bt);
}
}
private void initListener() {
setReloadListener(new Reload() {// 出错重新加载
@Override
public void OnReloadClick(View view) {
requestBabyKnowledgeData();
}
});
}
private void initData() {
Bundle argsBundle = getArguments();
if (null != argsBundle) {
babyTabId = argsBundle.getInt("babyTabId", 1);
babyDataItem = (GestateBabyDataItem) argsBundle.getSerializable("babyDataItem");
}
if (null == babyDataItem) {
requestBabyKnowledgeData();
} else {
updateViewData(babyDataItem);
}
}
}/**
* 各类tab通用一个Basefragment ： 比如 各类tab： 功能： 出错机制处理
*
* @author Administrator
*
*/
public abstract class TabBaseFragment extends BaseFragment {
public ClickScreenToReload clickToReload;
private FrameLayout mViewContainer;
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
this.activity = activity;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (null == mViewContainer) {
View view = inflater.inflate(R.layout.mam_base_main, null);
mViewContainer = (FrameLayout) view.findViewById(R.id.base_container);
}
onCreateContentView(inflater, savedInstanceState);
return mViewContainer;
}
public void onCreateContentView(LayoutInflater inflater, Bundle savedInstanceState) {
if (null != mViewContainer) {
mViewContainer.removeAllViews();
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT);
clickToReload = new ClickScreenToReload(activity);
clickToReload.setVisibility(View.GONE);
View viewContent = onCreateViewComplete(inflater, mViewContainer, savedInstanceState);
if (null != viewContent) {
mViewContainer.addView(viewContent, lp);
}
mViewContainer.addView(clickToReload, lp);
}
}
@Override
public void onDestroyView() {
super.onDestroyView();
ViewGroup parent = (ViewGroup) mViewContainer.getParent();
if (null != parent) {// 必须先清除父布局中的child，否则会报错“当前父布局已经有了一个child，不能再添加”
mViewContainer.removeAllViewsInLayout();
parent.removeView(mViewContainer);
}
}
/***
*
* @description 创建view
* @author zhongwr
* @update 2015-11-4 下午5:27:36
*/
public abstract View onCreateViewComplete(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState);
/**
*
* @description 设置网络不可见，点击重新加载
* @author zhongwr
* @update 2015-11-4 下午5:07:12
*/
protected void setReloadVisiable() {
clickToReload.setVisibility(View.VISIBLE);
clickToReload.setloadfail();
}
/**
*
* @description 设置加载数据为空
* @author zhongwr
* @update 2015-11-4 下午5:07:12
*/
protected void setLoadDataEmpty() {
clickToReload.setVisibility(View.VISIBLE);
clickToReload.setloadEmpty();
}
/**
*
* @description 设置正在加载
* @author zhongwr
* @update 2015-11-4 下午5:08:29
*/
protected void setLoadingVisiable() {
clickToReload.setVisibility(View.VISIBLE);
clickToReload.setLoading();
}
/**
*
* @description 隐藏这个出错界面
* @author zhongwr
* @update 2015-11-4 下午5:09:24
*/
protected void setClickToReloadGone() {
clickToReload.setVisibility(View.GONE);
}
/**
*
* @description 重新加载的监听器
* @author zhongwr
* @update 2015-11-4 下午5:32:44
*/
protected void setReloadListener(Reload reloadListener) {
clickToReload.setReloadClick(reloadListener);
}
/** 屏幕的三分之一 */
private int screenWidthThirdOne = Tools.getScreenSize(activity).x / 3;
/**
*
* @description 适配图片大图：图片布局除了间距显示宽度充满整个屏幕
* @author zhongwr
* @update 2015-11-13 上午11:32:08
*/
protected void setBigImageView(String picUrl, final ImageView ivPic) {
imageLoader.displayImage(picUrl, ivPic, options565, new SimpleImageLoadingListener() {
@Override
public void onLoadingComplete(String imageUri, final View view, final Bitmap loadedImage) {
if (null != loadedImage) {// 设置成背景，清除src否则重叠
ivPic.post(new Runnable() {
@Override
public void run() {
int ivMeasureWidth = ivPic.getMeasuredWidth();
LayoutParams params = ivPic.getLayoutParams();
int bmWidth = loadedImage.getWidth();
if (bmWidth < screenWidthThirdOne) {// 处理小图
params.height = LayoutParams.WRAP_CONTENT;
params.width = bmWidth;
} else if (ivMeasureWidth > 0) {
// 按原图的比例缩放
params.height = ivMeasureWidth * loadedImage.getHeight() / bmWidth;
params.width = ivMeasureWidth;
}
ivPic.setBackgroundDrawable(null);
ivPic.setImageDrawable(new BitmapDrawable(loadedImage));
}
});
} else {
ivPic.setImageDrawable(null);// 设置成背景，清除src否则重叠
ivPic.setBackgroundResource(R.drawable.default_user_head);
}
}
@Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
ivPic.setImageDrawable(null);// 设置成背景，清除src否则重叠
ivPic.setBackgroundResource(R.drawable.default_user_head);
}
});
}
}
本文章为转载内容，我们尊重原作者对文章享有的著作权。如有内容错误或侵权问题，欢迎原作者联系我们进行内容更正或删除文章。
