delphi for android 获取手机号

uses
  System.SysUtils,System.Types,System.UITypes,System.Classes,System.Variants,
  FMX.Types,FMX.Controls,FMX.Forms,FMX.Graphics,FMX.Dialogs,Androidapi.JNI.GraphicsContentViewText,
   Androidapi.JNIBridge,  Androidapi.JNI.Telephony,Androidapi.JNI.JavaTypes,
    FMX.Helpers.Android,FMX.StdCtrls;

type
  TForm1 = class(TForm)
    btn1: TButton;
    lbl1: TLabel;
    procedure btn1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  TelephonyManager: JTelephonyManager;
  TelephonyServiceNative: JObject;

implementation

{$R *.fmx}

procedure TForm1.btn1Click(Sender: TObject);
begin
  TelephonyServiceNative := SharedActivityContext.getSystemService
    (TJContext.JavaClass.TELEPHONY_SERVICE);
  if Assigned(TelephonyServiceNative) then
    TelephonyManager := TJTelephonyManager.Wrap
      ((TelephonyServiceNative as ILocalObject).GetobjectID);
  lbl1.Text:=JStringToString(TelephonyManager.getLine1Number);//取得手机号

end;