在我的应用程序中，我有一个 ListView 。当我有多个项目要显示时，一切都完美无缺，但是当我有一个项目要在我的 ListView 中显示时，它显示了一种罕见的行为。
首先:如果单个项目的高度大于窗口高度......它就像一个魅力并且正常工作。(A)
第二:如果单个项目的高度小于窗口高度...有时它会显示项目 (B)，有时不会! (C).
第三:我正在使用支持库中的 SwipeRefreshLayout，当我尝试刷新 ListView 时，如果我在 ListView 中有一个项目...如果它的高度小于窗口高度，它不会向我显示该项目。(C)
我想不出来!!任何人都可以帮助我
我知道这个问题与 SwipeRefreshLayout 或 Listview 的高度有关，因为当我将 marginTop 设置为此 View (作为屏幕高度的一半)时，listview 工作正常。
我的 xml 文件是:
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipe_Container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="0dp"
android:background="#FFedf1f2"
android:paddingLeft="8.5dp"
android:paddingRight="8.5dp"
android:paddingTop="0dp" >
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:divider="@android:color/transparent"
android:dividerHeight="8.5dp"
android:scrollbars="none" >
</ListView>
在 ListView 中显示至少一个项目之前，一切都很好用。但是当我在 ListView 中显示一个项目时，我的 ListView 不显示任何内容:(
为什么？我的错在哪里？我哪里错了？
这是我的适配器的 getView()(扩展的 BaseAdapter - 我剪掉了一些代码行):
public View getView(int position, View convertView, ViewGroup parent) {
Typeface MyriadRegular = Farsi.GetMyriadRegular(mActivity);
Typeface MyriadBold = Farsi.GetMyriadBold(mActivity);
Typeface Yagut = Farsi.GetYagut(mActivity);
Typeface JalalBold = Farsi.GetJalalBold(mActivity);
User_Session = new SessionManagement(mActivity);
View row = convertView;
ViewHolder holder;
mVideo = mData.get(position);
//======================================================================== USER
USERNAME = mVideo.get("USERNAME").toUpperCase();
CHANNEL_NAME = mVideo.get("CHANNEL_NAME");
CHANNEL_ID = mVideo.get("CHANNEL_ID");
USER_ID = mVideo.get("USER_ID");
AVATAR = mVideo.get("AVATAR");
//======================================================================== VIDEO
VIDEO_URL = mVideo.get("VIDEO_URL");
TITLE = mVideo.get("TITLE");
DESCRIPTION = mVideo.get("DESCRIPTION");
BIG_IMAGE = mVideo.get("BIG_IMAGE");
VIEW_CNT = mVideo.get("VIEW_CNT");
COMMENT_CNT = mVideo.get("COMMENT_CNT");
LIKE_CNT = mVideo.get("LIKE_CNT");
LIKE_COUNT = Integer.parseInt(LIKE_CNT);
DISLIKE_CNT = mVideo.get("DISLIKE_CNT");
DISLIKE_COUNT = Integer.parseInt(DISLIKE_CNT);
POST_DATE = mVideo.get("POST_DATE");
DURATION = mVideo.get("DURATION");
CATEGORY_TITLE = mVideo.get("CATEGORY_TITLE");
CATEGORY_ID = mVideo.get("CATEGORY_ID");
VIDEO_ID = mVideo.get("VIDEO_ID");
VIDEO_WEB = mVideo.get("VIDEO_WEB");
LIKE_W_USER = mVideo.get("LIKE_W_USER");
DISLIKE_W_USER = mVideo.get("DISLIKE_W_USER");
Follow_B_USER = mVideo.get("FOLLOW_B_USER");
Like_with_user = Boolean.parseBoolean(LIKE_W_USER);
Dislike_with_user = Boolean.parseBoolean(DISLIKE_W_USER);
FOLLOW_BY_USER = Boolean.parseBoolean(Follow_B_USER);
if(convertView == null) {
row = mInflater.inflate(R.layout.layout_list_row, parent, false);
holder = new ViewHolder(row);
row.setTag(holder);
}else{
row = convertView;
holder = (ViewHolder) row.getTag();
}
holder.user_Avatar.setTag(USER_ID);
holder.user_Name.setTag(USER_ID);
holder.user_Avatar.setOnClickListener(ChannelProfile);
holder.user_Name.setOnClickListener(ChannelProfile);
holder.video_Comment.setTag(position);
holder.video_Like.setTag(R.string.Position, position);
holder.video_Like.setTag(R.string.Video_ID, VIDEO_ID);
holder.video_Dislike.setTag(R.string.Position, position);
holder.video_Dislike.setTag(R.string.Video_ID, VIDEO_ID);
holder.video_Edit.setTag(position);
holder.video_Delete.setTag(position);
holder.video_editText.setTypeface(JalalBold);
holder.video_deleteText.setTypeface(JalalBold);
if (!mNext.equals("NONE")){
if (position >= getCount() - 1){
if(mSwipe != null){
mSwipe.setRefreshing(true);
}
loadmore();
}
}
holder.video_Duration.setTypeface(MyriadBold);
holder.video_Duration.setText(Farsi.Convert(DURATION));
holder.video_Title.setTypeface(Yagut);
holder.video_Title.setText(TITLE);
holder.user_Name.setTypeface(MyriadRegular);
holder.user_Name.setText(CHANNEL_NAME);
holder.video_Description.setTypeface(MyriadRegular);
holder.video_Description.setText(DESCRIPTION);
holder.video_Description.setClickable(true);
holder.video_CategoryTitle.setTypeface(JalalBold);
holder.video_CategoryTitle.setText(CATEGORY_TITLE);
holder.video_ViewCount.setTypeface(JalalBold);
holder.video_ViewCount.setText(VIEW_CNT);
holder.video_CommentCount.setTypeface(JalalBold);
return row;
}
编辑:这是我的 viewHolder 类:
静态类 ViewHolder{
TextView video_Duration;
TextView video_Title;
ExpandableTextView video_Description;
TextView video_CategoryTitle;
TextView video_ViewCount;
TextView video_PostDate;
TextView video_LikeCount;
TextView video_CommentCount;
TextView video_DislikeCount;
TextView video_editText;
TextView video_deleteText;
ImageView video_BigImage;
Button video_Like;
Button video_Dislike;
Button video_Comment;
RelativeLayout video_options;
RelativeLayout video_Edit;
RelativeLayout video_Delete;
//=================================
TextView user_Name;
ImageView user_Avatar;
public ViewHolder(View vi) {
video_Duration = (TextView) vi.findViewById(R.id.video_Duration);
video_Title = (TextView) vi.findViewById(R.id.video_Title);
video_Description = (ExpandableTextView) vi.findViewById(R.id.video_Description);
video_CategoryTitle = (TextView) vi.findViewById(R.id.video_Category_Title);
video_ViewCount = (TextView) vi.findViewById(R.id.video_View_Count);
video_PostDate = (TextView) vi.findViewById(R.id.video_Post_Date);
video_LikeCount = (TextView) vi.findViewById(R.id.video_like_cnt);
video_CommentCount = (TextView) vi.findViewById(R.id.video_Comment_cnt);
video_DislikeCount = (TextView) vi.findViewById(R.id.video_dislike_cnt);
video_editText = (TextView) vi.findViewById(R.id.edit_text);
video_deleteText = (TextView) vi.findViewById(R.id.delete_text);
video_BigImage = (ImageView) vi.findViewById(R.id.video_Image);
video_Like = (Button) vi.findViewById(R.id.video_Like);
video_Dislike = (Button) vi.findViewById(R.id.video_disLike);
video_Comment = (Button) vi.findViewById(R.id.video_Comment);
video_options = (RelativeLayout) vi.findViewById(R.id.videoOptions);
video_Edit = (RelativeLayout) vi.findViewById(R.id.videoEditBtn);
video_Delete = (RelativeLayout) vi.findViewById(R.id.videoDeleteBtn);
user_Name = (TextView) vi.findViewById(R.id.username);
user_Avatar = (ImageView) vi.findViewById(R.id.user_avatar);
}
}
JSON 解析部分(我正在使用 ION 库进行异步网络):
private void initSearch(String tag, boolean refresh){
final boolean ReforNormal = refresh;
URL = Constants.Search_URL+tag;
if(User_Session.isLoggedIn()){
URL = Constants.Search_URL+tag+"&token="+User_TOKEN;
}
System.out.println("URL: "+URL);
if (VideoLoad != null && !VideoLoad.isDone() && !VideoLoad.isCancelled()) return;
VideoLoad = Ion.with(this).load(URL).asJsonObject().setCallback(new FutureCallback<JsonObject>() {
@Override
public void onCompleted(Exception e, JsonObject result) {
if (ReforNormal == true){
mAdapter.clearData();
}
if ( e == null){
System.out.println("RESULT: "+result);
Videos = result.getAsJsonArray("objects");
if(Videos.size() > 0){
for (int i = 0; i < Videos.size(); i++) {
JsonObject Item = Videos.get(i).getAsJsonObject();
//======================================================================== USER
USERNAME = Item.get("username").getAsString();
CHANNEL_NAME = Item.get("channel_name").getAsString();
CHANNEL_ID = Item.get("channel_id").getAsString();
USER_ID = Item.get("user_id").getAsString();
AVATAR = Item.get("avatar").getAsString();
//======================================================================== VIDEO
VIDEO_URL = Item.get("video_url").getAsString();
TITLE = Item.get("title").getAsString();
DESCRIPTION = Item.get("text").getAsString();
BIG_IMAGE = Item.get("image").getAsString();
VIEW_CNT = Item.get("cnt_view").getAsString();
COMMENT_CNT = Item.get("cnt_comment").getAsString();
LIKE_CNT = Item.get("cnt_like").getAsString();
DISLIKE_CNT = Item.get("cnt_dislike").getAsString();
POST_DATE = Item.get("create_time").getAsString();
DURATION = Item.get("duration").getAsString();
CATEGORY_TITLE = Item.get("category_title").getAsString();
CATEGORY_ID = Item.get("category_id").toString();
VIDEO_ID = Item.get("id").getAsString();
VIDEO_WEB = Item.get("web_url").getAsString();
LIKE_W_USER = Item.get("like_with_user").getAsString();
DISLIKE_W_USER = Item.get("dislike_with_user").getAsString();
Follow_B_USER = Item.get("follow_by_user").getAsString();
HashMap<String, String> Items = new HashMap<String, String>();
Items.put("USERNAME", USERNAME);
Items.put("CHANNEL_NAME", CHANNEL_NAME);
Items.put("CHANNEL_ID", CHANNEL_ID);
Items.put("USER_ID", USER_ID);
Items.put("AVATAR", AVATAR);
Items.put("VIDEO_URL", VIDEO_URL);
Items.put("TITLE", TITLE);
Items.put("DESCRIPTION", DESCRIPTION);
Items.put("BIG_IMAGE", BIG_IMAGE);
Items.put("VIEW_CNT", VIEW_CNT);
Items.put("COMMENT_CNT", COMMENT_CNT);
Items.put("LIKE_CNT", LIKE_CNT);
Items.put("DISLIKE_CNT", DISLIKE_CNT);
Items.put("POST_DATE", POST_DATE);
Items.put("DURATION", DURATION);
Items.put("CATEGORY_TITLE", CATEGORY_TITLE);
Items.put("CATEGORY_ID", CATEGORY_ID);
Items.put("VIDEO_ID", VIDEO_ID);
Items.put("VIDEO_WEB", VIDEO_WEB);
Items.put("LIKE_W_USER", LIKE_W_USER);
Items.put("DISLIKE_W_USER", DISLIKE_W_USER);
Items.put("Follow_B_USER", Follow_B_USER);
DATA.add(Items);
}
Page = result.getAsJsonObject("meta");
if(User_Session.isLoggedIn()){
HashMap<String, String> user = User_Session.GetUserDetails();
String User_TOKEN = user.get(SessionManagement.KEY_USERTOKEN);
if(Page.equals("")){
NextPage = "NONE";
}else{
NextPage = Page.get("next").getAsString()+"&token="+User_TOKEN;
}
}else{
if(Page.equals("")){
NextPage = "NONE";
}else{
NextPage = Page.get("next").getAsString();
}
}
mAdapter = new MyCustomAdapter(SearchActivity.this, DATA, NextPage, ParsvidswipeLayout, false, false, "");
list.setAdapter(mAdapter);
mAdapter.notifyDataSetChanged();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
ParsvidswipeLayout.setRefreshing(false);
}
}, 500);
}else{
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
ParsvidswipeLayout.setRefreshing(false);
}
}, 500);
}
}
}
});
}
最佳答案
问题出在您每次都创建 new Adapter 而不是将数据添加到 Adapter
mAdapter = new MyCustomAdapter(SearchActivity.this, DATA, NextPage, ParsvidswipeLayout, false, false, "");
list.setAdapter(mAdapter);
mAdapter.notifyDataSetChanged();
只需使用适配器中的方法 addAll( ) 添加数据即可。完全不需要在每次数据加载时一次又一次地更换适配器。
我在你的代码中只发现了这个问题。
关于android - SwipeRefreshLayout 中的 ListView - 当自定义适配器只有一行要显示时不显示任何内容，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26618054/