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开发工具：Delphi XE7
测试手机：华为荣耀X1
}
unit Unit1;
interface
uses
System.SysUtils, System.Types, System.UITypes, System.Classes,
System.Variants,
FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMX.StdCtrls,
FMX.Layouts, FMX.Memo;
type
TForm1 = class(TForm)
Panel1: TPanel;
Memo1: TMemo;
Panel2: TPanel;
Button1: TButton;
Button2: TButton;
Memo2: TMemo;
Button3: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure FormResize(Sender: TObject);
private
{ Private declarations }
// 重新设置button按钮
procedure ResetButton;
public
{ Public declarations }
end;
var
Form1: TForm1;
const
// 演示用的JSON
jsonString = '{"name":"张三", "other":["中国","程序员"]}';
implementation
{$R *.fmx}
uses
System.json; // Dephi自带的JSON单元
procedure TForm1.Button1Click(Sender: TObject);
var
JSONObject: TJSONObject; // JSON类
i: Integer; // 循环变量
temp: string; // 临时使用变量
jsonArray: TJSONArray; // JSON数组变量
begin
if Trim(Memo1.Text) = '' then
begin
ShowMessage('要解析数据不能为空！');
end
else
begin
JSONObject := nil;
try
{ 从字符串生成JSON }
JSONObject := TJSONObject.ParseJSONValue(Trim(Memo1.Text)) as TJSONObject;
if JSONObject.Count > 0 then
begin
{ 1,遍历JSON数据 }
Memo2.Lines.Add('遍历JSON数据：' + #13#10);
Memo2.Lines.Add('JSON数据数量：' + IntToStr(JSONObject.Count));
for i := 0 to JSONObject.Count - 1 do
begin
if i = 0 then
begin
temp := JSONObject.Get(i).ToString + #13#10;;
end
else
begin
temp := temp + JSONObject.Get(i).ToString + #13#10;
end;
end;
{ output the JSON to console as String }
Memo2.Lines.Add(temp);
Memo2.Lines.Add('------------------------------');
{ 2,按元素解析JSON数据 }
Memo2.Lines.Add('按元素解析JSON数据：' + #13#10);
temp := 'name = ' + JSONObject.Values['name'].ToString + #13#10;
Memo2.Lines.Add(temp);
// json数组
jsonArray := TJSONArray(JSONObject.GetValue('other'));;
if jsonArray.Count > 0 then
begin
// 得到JSON数组字符串
temp := 'other = ' + JSONObject.GetValue('other').ToString + #13#10;
// 循环取得JSON数组中每个元素
for i := 0 to jsonArray.Size - 1 do
begin
temp := temp + IntToStr(i + 1) + ' : ' + jsonArray.Items[i]
.Value + #13#10;
end;
end;
Memo2.Lines.Add(temp);
end
else
begin
temp := '没有数据！';
Memo2.Lines.Add(temp);
end;
finally
JSONObject.Free;
end;
end;
end;
// 清空显示数据
procedure TForm1.Button2Click(Sender: TObject);
begin
Memo1.Text := '';
Memo2.Text := '';
end;
// 设置要解析的JSON数据
procedure TForm1.Button3Click(Sender: TObject);
begin
Memo1.Text := jsonString;
end;
// 设置要解析的JSON数据
procedure TForm1.FormCreate(Sender: TObject);
begin
Memo1.Text := jsonString;
end;
procedure TForm1.FormResize(Sender: TObject);
begin
// 重新设置button按钮
self.ResetButton;
end;
// 重新设置button按钮
procedure TForm1.ResetButton;
var
buttonWidth: Integer;
begin
buttonWidth := self.Width div 3;
Button1.Width := buttonWidth;
Button2.Width := butt |