Android实例-IdHTTP下载(并实现自动安装)(XE10+小米2)

相关资料：

1.群号 383675978

2.运行时提示"connection closed gracefully"错误原因与解决 http://www.delphifans.com/InfoView/Article_4588.html

3.编译时提示"[Exec Error] The command ..... exited with code 1."错误原因不明，解决方法删除androidSDK，下载新版本的，引入新版本的SDK。

实例源码：

  1 unit Unit1;
  2 
  3 interface
  4 
  5 uses
  6   System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  7   FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,
  8   FMX.Controls.Presentation, FMX.StdCtrls, FMX.Objects,
  9   System.IOUtils, IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient,
 10   Androidapi.Jni.Net,//TJnet_Uri使用
 11   Androidapi.JNI.JavaTypes, //Jfile使用
 12   Androidapi.JNI.GraphicsContentViewText,//JIntent使用
 13   Androidapi.Helpers,//stringtojstring使用
 14   IdHTTP;//TPath使用
 15 
 16 type
 17   TForm1 = class(TForm)
 18     Label1: TLabel;
 19     ProgressBar1: TProgressBar;
 20     Label2: TLabel;
 21     Button1: TButton;
 22     IdHTTP1: TIdHTTP;
 23     procedure Button1Click(Sender: TObject);
 24     procedure IdHTTP1Work(ASender: TObject; AWorkMode: TWorkMode;
 25       AWorkCount: Int64);
 26     procedure IdHTTP1WorkBegin(ASender: TObject; AWorkMode: TWorkMode;
 27       AWorkCountMax: Int64);
 28     procedure IdHTTP1WorkEnd(ASender: TObject; AWorkMode: TWorkMode);
 29   private
 30     { Private declarations }
 31     isDown:Boolean;
 32     function DownFilePath: string;
 33   public
 34     { Public declarations }
 35   end;
 36 
 37 const
 38   FileName = 'test.apk';
 39 
 40 var
 41   Form1: TForm1;
 42 
 43 implementation
 44 
 45 {$R *.fmx}
 46 {$R *.NmXhdpiPh.fmx ANDROID}
 47 
 48 procedure TForm1.Button1Click(Sender: TObject);
 49 var
 50   sURLPath,sFilePath: string;
 51   oFile: TFileStream;
 52 begin
 53   isDown := True;
 54   sFilePath := DownFilePath + FileName;
 55   if FileExists(sFilePath) then  //判断以前文件是否存在
 56     DeleteFile(sFilePath);
 57 
 58 //  sURLPath:= 'http://bcscdn.baidu.com/netdisk/BaiduYun_7.12.1.apk';//文件下载地址(用百度云测试了)
 59 //  本来想用百度云的，我艹，不知道为什么百度云下载着，就提示“connection closed gracefully”
 60   sURLPath:= 'http://m.down.sandai.net/MobileThunder/Android_5.15.2.3820/XLWXguanwang.apk';//文件下载地址(用百度云测试了)
 61 
 62   oFile := TFileStream.Create(sFilePath, fmCreate);  //文件下载后保存的路径
 63   try
 64     ProgressBar1.Value := 0;
 65     IdHTTP1.Get(sURLPath, oFile);
 66   except
 67   end;
 68   oFile.Free;
 69 end;
 70 
 71 function TForm1.DownFilePath: string;
 72 begin
 73   Result := TPath.GetDownloadsPath + PathDelim;
 74 end;
 75 
 76 procedure TForm1.IdHTTP1Work(ASender: TObject; AWorkMode: TWorkMode;
 77   AWorkCount: Int64);
 78 begin
 79   ProgressBar1.Value := AWorkCount;
 80 end;
 81 
 82 procedure TForm1.IdHTTP1WorkBegin(ASender: TObject; AWorkMode: TWorkMode;
 83   AWorkCountMax: Int64);
 84 begin
 85   ProgressBar1.Value := AWorkCountMax;
 86 end;
 87 
 88 procedure TForm1.IdHTTP1WorkEnd(ASender: TObject; AWorkMode: TWorkMode);
 89 {$IFDEF ANDROID}
 90 Var
 91  oFile: Jfile;
 92  oIntent: JIntent;
 93 {$ENDIF}
 94 begin
 95   {$IFDEF ANDROID}
 96   //下载完成后自动安装
 97   if isDown then
 98   begin
 99     Try
100       oFile := TJfile.JavaClass.init(stringtojstring(DownFilePath), stringtojstring(FileName));
101       oIntent := TJIntent.Create;
102       oIntent.setAction(TJIntent.JavaClass.ACTION_VIEW);
103       oIntent.addFlags(TJIntent.JavaClass.FLAG_ACTIVITY_NEW_TASK);
104       oIntent.setDataAndType(TJnet_Uri.JavaClass.fromFile(oFile), StringToJString('application/vnd.android.package-archive'));
105       SharedActivityContext.startActivity(oIntent);
106     Except
107     End;
108   end;
109   {$ENDIF}
110 end;
111 
112 end.