java - Delphi xe5 exec root命令转换

Question

我试图隐藏Runtime和 Process将 shell 命令发送到 root 手机我不明白为什么我有段错误。在互联网上我发现 Java 代码如下:

Runtime.getRuntime().exec(new String[]{"/system/bin/su","-c","reboot now"});` for reboot of the phone or `Runtime.getRuntime().exec("su");

用于 linux root 权限。

我试图在转换后只发送带有函数的“su”命令，但我想我错了......我认为一个可能的问题可能是从 java 类型转换的 Jstring 数组。

unit Androidapi.JNI.Root;

interface
    procedure AskRoot;
implementation
   uses  System.SysUtils,
  Androidapi.JNIBridge,
  Androidapi.JNI.GraphicsContentViewText,
  Androidapi.JNI.JavaTypes,
  FMX.Helpers.Android;

 type
  JProcess = interface;
  JRuntime = interface;
 //----------------------------------JProcess----------------------
  JProcessClass = interface(JObjectClass)
  ['{7BFD2CCB-89B6-4382-A00B-A7B5BB0BC7C9}']

  end;
  [JavaSignature('java/lang/Process')]
  JProcess = interface(JObject)
  ['{476414FD-570F-4EDF-B678-A2FE459EA6EB}']
    {Methods}
    procedure destroy; cdecl;
    function exitValue:integer;cdecl;
    function getErrorStream:JInputStream; cdecl;
    function getInputStream:JOutputStream; cdecl;
    function waitFor:integer;cdecl;
  end;
  TJProcess = class(TJavaGenericImport<JProcessClass, JProcess>) end;
  //----------------------------------Jruntime----------------------
  JRuntimeClass = interface(JObjectClass)
    ['{3F2E949D-E97C-4AD8-B5B9-19CB0A6A29F3}']
    {costant}
  end;
  [JavaSignature('java/lang/Runtime')]
  JRuntime = interface(JObject)
  ['{C097A7EC-677B-4BCB-A4BD-7227160750A5}']
       {Methods}
      procedure addShutdownHook(hook:JThread);cdecl;
      function availableProcessors:integer; cdecl;
      function exec(progArray,envp:array of JString):Jprocess; overload;
      function exec(progArray:Jstring; envp:array of JString;directory:JFile):Jprocess; overload;
      function exec(progArray,envp:array of JString;directory:JFile):Jprocess; overload;
      function exec(prog:JString;envp:array of JString):Jprocess;  cdecl; overload;
      function exec(progArray:array of JString):Jprocess; overload;
      function exec(prog:JString):Jprocess;  cdecl; overload;
      procedure Exit(code:Integer);cdecl;
      function freeMemory:LongInt;cdecl;
      procedure gc; cdecl;
      function getLocalizedInputStream(stream:JInputStream):JInputStream; cdecl;
      function getLocalizedOutputStream(stream:JOutputStream):JOutputStream; cdecl;
      function getRuntime:JRuntime;cdecl;
      procedure halt(code:Integer);cdecl;
      procedure load(pathName:JString);cdecl;
      procedure loadLibrary(libName:JString); cdecl;
      function maxMemory:LongInt;cdecl;
      function RemoveShutdownHook(hook:JThread):Boolean;cdecl;
      procedure runFinalization;cdecl;
      procedure runFinalizersOnExit(run:Boolean);cdecl;
      function totalMemory:LongInt;cdecl;
      procedure traceInstructions(enable:Boolean);cdecl;
      procedure traceMethodCalls(enable:Boolean); cdecl;
  end;
  TJRuntime = class(TJavaGenericImport<JRuntimeClass, JRuntime>) end;

  procedure AskRoot;
  var root:JRuntime;
  begin
    root.getRuntime.exec(StringToJString('su'));
  end;
end.

Answer 1

您的几个 exec 覆盖未标记为 cdecl。

这无济于事 - 堆栈会变得困惑并可能导致段错误。

但是你调用的那个被标记为cdecl。

另一方面，您正在调用尚未初始化的 root 对象/接口(interface)引用的方法。这种操作肯定会给您带来段错误。

getRuntime 看起来是 Runtime 类的类方法，因此您输入了错误的接口(interface)。当你把它移到正确的位置时，我想像这样的事情可能会做到:

TJRuntime.JavaClass.getRuntime.exec(StringToJString('su'));