Listview中的奇怪字符
我有一个Android项目的Listview文本自动高度代码。高度固定,一切正常。当我激活此代码时Listview中的奇怪字符,listview,delphi,height,firemonkey,Listview,Delphi,Height,Firemonkey,我有一个Android项目的Listview文本自动高度代码。高度固定,一切正常。当我激活此代码时LText.Height:=ListView1.getItemTextHeight(LText)+10自动高度可以正常工作,但在粗体上会出现奇怪的字符,有时还会出现“不允许重复”错误消息。 在Windows中工作很好,但在Android上我有这个 for i := 0 to FDMemTable1.RecordCount -1 do begin UName :=
LText.Height:=ListView1.getItemTextHeight(LText)+10代码>自动高度可以正常工作,但在粗体上会出现奇怪的字符,有时还会出现“不允许重复”错误消息。
在Windows中工作很好,但在Android上我有这个
for i := 0 to FDMemTable1.RecordCount -1 do
begin
UName := (FDMemTable1.FieldByName('username').Value);
Descr := (FDMemTable1.FieldByName('descr').Value);
Ext := (FDMemTable1.FieldByName('ext').Value);
Url := (FDMemTable1.FieldByName('vurl').Value);
FCanUpdate := False;
LItem := ListView1.Items.Add;
LItem.Data['UName'] := UName;
LItem.Data['Descr'] := Descr;
LItem.Data['Ext'] := Ext;
LItem.Data['Url'] := Url;
FCanUpdate := True;
LItem.Adapter.ResetView(LItem);
FDMemTable1.Next;
end;
ListView1.EndUpdate;
end;
procedure TForm7.ListView1UpdatingObjects(const Sender: TObject;
const AItem: TListViewItem; var AHandled: Boolean);
var
h: integer;
LText: TListItemText;
begin
h := 2;
LText := AItem.Objects.FindObjectT<TListItemText>('UName_text');
if LText = nil then
begin
LText := TListItemText.Create(AItem);
LText.Name := 'UName_text';
LText.PlaceOffset.X := 18;
LText.PlaceOffset.Y := h;
LText.TextColor := TAlphaColorRec.Black;
LText.TextAlign := TTextAlign.Leading;
LText.TextVertAlign := TTextAlign.Leading;
LText.Font.Size := 14;
LText.Font.Style := [TFontStyle.fsBold];
end;
LText.Width := (Sender as TListView).Width - 18;
LText.Text := AItem.Data['UName'].AsString;
LText.Height := 22;
h := Round(h + LText.Height +7);
if AItem.Data['Descr'].AsString <> '' then
begin
LText := AItem.Objects.FindObjectT<TListItemText>('Descr_text');
if LText = nil then
begin
LText := TListItemText.Create(AItem);
LText.Name := 'Descr_text';
LText.PlaceOffset.X := 18;
LText.PlaceOffset.Y := h;
LText.TextColor := TAlphaColorRec.Black;
LText.TextAlign := TTextAlign.Leading;
LText.TextVertAlign := TTextAlign.Leading;
LText.WordWrap := True;
LText.Font.Size := 13;
LText.Font.Style := [];
end;
LText.Width := (Sender as TListView).Width - 20;
LText.Text := AItem.Data['Descr'].AsString;
// LText.Height := ListView1.getItemTextHeight(LText)+10;
LText.Height := 30;
h := Round(h + LText.Height + 5);
end;
AItem.Height := h;
AHandled := True;
end;
i:=0到FDMemTable1.RecordCount-1 do的
开始
UName:=(FDMemTable1.FieldByName('username').Value);
Descr:=(FDMemTable1.FieldByName('Descr').Value);
Ext:=(FDMemTable1.FieldByName('Ext').Value);
Url:=(FDMemTable1.FieldByName('vurl').Value);
FCanUpdate:=假;
LItem:=ListView1.Items.Add;
文字数据['UName']:=UName;
文字数据['Descr']:=Descr;
文字数据['Ext']:=Ext;
文字数据['Url']:=Url;
FCanUpdate:=真;
LItem.Adapter.ResetView(LItem);
表1.下一步;
结束;
ListView1.EndUpdate;
结束;
过程TForm7.ListView1更新对象(常量发送方:ToObject;
常量AItem:TListViewItem;变量AHandled:Boolean);
变量
h:整数;
LText:TListItemText;
开始
h:=2;
LText:=AItem.Objects.findobject('UName_text');
如果LText=nil,则
开始
LText:=TListItemText.Create(AItem);
LText.Name:=“UName_text”;
LText.PlaceOffset.X:=18;
LText.PlaceOffset.Y:=h;
LText.TextColor:=TAlphaColorRec.Black;
LText.TextAlign:=TTEXTAIGN.Leading;
LText.TextVertAlign:=TTextAlign.Leading;
LText.Font.Size:=14;
LText.Font.Style:=[TFontStyle.fsBold];
结束;
LText.WITH:=(发送方作为TListView)。宽度-18;
LText.Text:=AItem.Data['UName'].AsString;
L文字高度:=22;
h:=圆形(h+L文本高度+7);
如果AItem.Data['Descr'].AsString'',则
开始
LText:=AItem.Objects.findobject('Descr_text');
如果LText=nil,则
开始
LText:=TListItemText.Create(AItem);
LText.Name:=“描述文字”;
LText.PlaceOffset.X:=18;
LText.PlaceOffset.Y:=h;
LText.TextColor:=TAlphaColorRec.Black;
LText.TextAlign:=TTEXTAIGN.Leading;
LText.TextVertAlign:=TTextAlign.Leading;
LText.WordWrap:=True;
LText.Font.Size:=13;
LText.Font.Style:=[];
结束;
LText.Width:=(发送方作为TListView)。宽度-20;
LText.Text:=AItem.Data['Descr'].AsString;
//LText.Height:=ListView1.getItemTextHeight(LText)+10;
L文字高度:=30;
h:=圆形(h+LText.高度+5);
结束;
AItem.高度:=h;
a处理:=正确;
结束;
我手机上的截图。
这有什么问题?我发现这段代码有问题。
我将此过程称为TThread.CreateAnonymousThread。
当我去掉这个时,一切都很好。我发布了正确的代码,用代码创建ListView项目(在本例中,从url创建2个文本和1个图像)
procedure TForm9.LVC;
var
i, TLikes, LVIHeight, ImgH, ImgW: integer;
UName, Descr, Ext, ThumbUrl, Url: UnicodeString;
LItem : TListViewItem;
begin
RESTRequest1.Execute;
FDMemTable1.First;
for i := 0 to FDMemTable1.RecordCount -1 do
begin
UName := FDMemTable1.FieldByName('username').Value;
Descr := FDMemTable1.FieldByName('descr').Value;
Ext := FDMemTable1.FieldByName('ext').Value;
ThumbUrl := FDMemTable1.FieldByName('image_url').Value;
Url := FDMemTable1.FieldByName('vurl').Value;
TLikes := FDMemTable1.FieldByName('TotalLikes').Value;
if FDMemTable1.FieldByName('imgh').Value <> '' then
begin
ImgH := StrToInt(FDMemTable1.FieldByName('imgh').Value);
ImgW := StrToInt(FDMemTable1.FieldByName('imgw').Value);
LVIHeight := round((ListView1.Width / ImgW) * ImgH);
end
else
begin
ImgH := 0;
ImgW := 0;
LVIHeight := 0;
end;
ListView1.BeginUpdate;
FCanUpdate := False;
LItem := ListView1.Items.Add;
LItem.Data['UName'] := UName;
LItem.Data['Descr'] := Descr;
LItem.Data['Ext'] := Ext;
LItem.Data['ThumbUrl'] := ThumbUrl;
LItem.Data['Url'] := Url;
LItem.Data['Likes'] := TLikes;
LItem.Data['ImgH'] := ImgH;
LItem.Data['ImgW'] := ImgW;
LItem.Data['LVIHeight'] := LVIHeight;
FCanUpdate := True;
LItem.Adapter.ResetView(LItem);
ListView1.EndUpdate;
FDMemTable1.Next;
end;
end;
procedure TForm9.FormCreate(Sender: TObject);
begin
FCanUpdate := True;
end;
procedure TForm9.FormShow(Sender: TObject);
begin
LVC;
end;
procedure TForm9.ListView1UpdatingObjects(const Sender: TObject;
const AItem: TListViewItem; var AHandled: Boolean);
var
h: integer;
LText: TListItemText;
LImage: TListItemImage;
LImageURL: String;
foto : TBitmap;
begin
if not FCanUpdate then
Exit;
h := 2;
LText := AItem.Objects.FindObjectT<TListItemText>('UName_text');
if LText = nil then
begin
LText := TListItemText.Create(AItem);
LText.Name := 'UName_text';
LText.PlaceOffset.X := 18;
LText.PlaceOffset.Y := h;
LText.TextColor := TAlphaColorRec.Black;
LText.TextAlign := TTextAlign.Leading;
LText.TextVertAlign := TTextAlign.Leading;
LText.Font.Size := 14;
LText.Font.Style := [TFontStyle.fsBold];
end;
LText.Width := (Sender as TListView).Width - 18;
LText.Text := AItem.Data['UName'].AsString;
LText.Height := 22;
h := Round(h + LText.Height +7);
if AItem.Data['ThumbUrl'].AsString <> '' then
begin
LImage := AItem.Objects.FindObjectT<TListItemImage>('MImage');
if LImage = nil then
begin
LImage := TListItemImage.Create(AItem);
LImage.Name := 'MImage';
LImage.Bitmap:=Nil;
LImage.Align := TListitemalign.Leading;
LImage.VertAlign := TListItemAlign.Leading;
LImage.ScalingMode := TImageScalingMode.StretchWithAspect;
LImage.PlaceOffset.X := 0;
LImage.PlaceOffset.Y := h;
LImage.Bitmap := TBitmap.Create;
LImage.OwnsBitmap := True;
LImage.Visible := True;
end;
LImage.Width := ListView1.Width;
LImage.Height := AItem.Data['LVIHeight'].AsInteger;
LImageURL := AItem.Data['ThumbUrl'].AsString;
TThread.CreateAnonymousThread(
procedure
begin
foto := TBitmap.Create;
fnLoadImgFromUrl(LImageURL, foto);
LImage.OwnsBitmap := True;
LImage.Bitmap := foto;
end).Start;
h := Round(h + LImage.Height + 5);
end;
if AItem.Data['Descr'].AsString <> '' then
begin
LText := AItem.Objects.FindObjectT<TListItemText>('Descr_text');
if LText = nil then
begin
LText := TListItemText.Create(AItem);
LText.Name := 'Descr_text';
LText.PlaceOffset.X := 18;
LText.PlaceOffset.Y := h;
LText.TextColor := TAlphaColorRec.Black;
LText.TextAlign := TTextAlign.Leading;
LText.TextVertAlign := TTextAlign.Leading;
LText.WordWrap := True;
LText.Font.Size := 13;
LText.Font.Style := [];
end;
LText.Width := (Sender as TListView).Width - 20;
LText.Text := AItem.Data['Descr'].AsString;
LText.Height := ListView1.getItemTextHeight(LText)+10;
h := Round(h + LText.Height + 5);
end;
AItem.Height := h;
AHandled := True;
end;
程序TForm9.LVC;
变量
i、 TLikes、LVIHeight、ImgH、ImgW:整数;
UName,Descr,Ext,ThumbUrl,Url:unicodesting;
LItem:TListViewItem;
开始
RESTRequest1.执行;
表1.第一;
对于i:=0到FDMemTable1.RecordCount-1 do
开始
UName:=FDMemTable1.FieldByName('username')。值;
Descr:=FDMemTable1.FieldByName('Descr')。值;
Ext:=FDMemTable1.FieldByName('Ext')。值;
ThumbUrl:=FDMemTable1.FieldByName('image_url')。值;
Url:=FDMemTable1.FieldByName('vurl')。值;
TLikes:=FDMemTable1.FieldByName('totalikes')。值;
如果FDMemTable1.FieldByName('imgh')。值为“”,则
开始
ImgH:=stroint(FDMemTable1.FieldByName('ImgH').Value);
ImgW:=stroint(FDMemTable1.FieldByName('ImgW').Value);
LVIHeight:=圆形((ListView1.Width/ImgW)*ImgH);
结束
其他的
开始
ImgH:=0;
ImgW:=0;
LVIHeight:=0;
结束;
ListView1.BeginUpdate;
FCanUpdate:=假;
LItem:=ListView1.Items.Add;
文字数据['UName']:=UName;
文字数据['Descr']:=Descr;
文字数据['Ext']:=Ext;
LItem.Data['ThumbUrl']:=ThumbUrl;
文字数据['Url']:=Url;
文字数据['Likes']:=TLikes;
文字数据['ImgH']:=ImgH;
文字数据['ImgW']:=ImgW;
文字数据['LVIHeight']:=LVIHeight;
FCanUpdate:=真;
LItem.Adapter.ResetView(LItem);
ListView1.EndUpdate;
表1.下一步;
结束;
结束;
过程TForm9.FormCreate(发送方:TObject);
开始
FCanUpdate:=真;
结束;
程序TForm9.FormShow(发送方:ToObject);
开始
LVC;
结束;
过程TForm9.ListView1更新对象(常量发送方:ToObject;
常量AItem:TListViewItem;变量AHandled:Boolean);
变量
h:整数;
LText:TListItemText;
LImage:tlistitemage;
LImageURL:String;
foto:TBitmap;
开始
如果没有FCA更新,则
出口
h:=2;
LText:=AItem.Objects.findobject('UName_text');
如果LText=nil,则
开始
LText:=TListItemText.Create(AItem);
LText.Name:=“UName_text”;
LText.PlaceOffset.X:=18;
LText.PlaceOffset.Y:=h;
LText.TextColor:=TAlphaColorRec.Black;
LText.TextAlign:=TTEXTAIGN.Leading;
LText.TextVertAlign:=TTextAlign.Leading;
LText.Font.Size:=14;
LText.Font.Style:=[TFontStyle.fsBold];
结束;
LText.WITH:=(发送方作为TListView)。宽度-18;
LText.Text:=AItem.Data['UName'].AsString;
L文字高度:=22;
h:=圆形(h+L文本高度+7);
如果AItem.Data['ThumbUrl'].AsString'',则
开始
LImage:=AItem.Objects.findobject('MImage');
如果LImage=nil,则
开始
LImage:=TListItemImage.Create(AItem);
LImage.Name:=“MImage”;
位图:=Nil;
LImage.Align:=TListitemalign.Leading;
LImage.VertAlign:=TListItemAlign.Leading;
LImage.ScalingMode:=TImageScalingMode.StretchWithAspect;
LImage.PlaceOffset.X:=0;
LImage.PlaceOffset.Y:=h;
LImage.Bitmap:=TBitmap.Create;
LImage.OwnsBitmap:=真;
LImage.Visible:=真;
E