{*******************************************************}
{                                                       }
{       Helpers for Android                             }
{                                                       }
{       Copyright (C) 2020 KngStr                       }
{                                                       }
{   Some Code from Kastri Free of DelphiWorlds, Thanks  }
{                                                       }
{*******************************************************}

unit ksAndroid.Helpers;

interface

uses
  Androidapi.JNI.GraphicsContentViewText, Androidapi.JNI.App,
  Androidapi.JNI.JavaTypes, Androidapi.JNI.Net;

type
  TAndroidHelperEx = record
  private
    class function GetJActivity: JActivity; static;
    class function GetJContext: JContext; static;
  public
    const
      ICE_CREAM_SANDWICH = 14;
      ICE_CREAM_SANDWICH_MR1 = 15;
      JELLY_BEAN = 16;
      JELLY_BEAN_MR1 = 17;
      JELLY_BEAN_MR2 = 18;
      KITKAT = 19;
      KITKAT_MR1 = 20;
      LOLLIPOP = 21;
      LOLLIPOP_MR1 = 22;
      MARSHMALLOW = 23;
      NOUGAT = 24;
      NOUGAT_MR1 = 25;
      OREO = 26;
      OREO_MR1 = 27;
      PIE = 28;
      Q = 29;
    /// <summary>
    ///   Checks if both build and target are greater or equal to the tested value
    /// </summary>
    class function CheckBuildAndTarget(const AValue: Integer): Boolean; static;
    /// <summary>
    ///   Returns the equivalent of "AndroidClass.class"
    /// </summary>
    class function GetClass(const APackageClassName: string): Jlang_Class; static;
    /// <summary>
    ///   Returns the application default icon ID
    /// </summary>
    class function GetDefaultIconID: Integer; static;
    /// <summary>
    ///   Returns a URI to the notification sound
    /// </summary>
    class function GetDefaultNotificationSound: Jnet_Uri; static;
    /// <summary>
    ///   Returns target Sdk version
    /// </summary>
    class function GetTargetSdkVersion: Integer; static;
    /// <summary>
    ///   Returns installed Sdk version
    /// </summary>
    class function GetBuildSdkVersion: Integer; static;
    /// <summary>
    ///   Returns whether the activity is running foreground
    /// </summary>
    /// <remarks>
    ///   Useful from within a service to determine whether or not the service needs to run in foreground mode
    /// </remarks>
    class function IsActivityForeground: Boolean; static;
    /// <summary>
    ///   Converts file to uri, using FileProvider if target API >= 24
    /// </summary>
    /// <remarks>
    ///   Use this only when accessing files with an "external" URI
    /// </remarks>
    class function UriFromFile(const AFile: JFile): Jnet_Uri; static;
    /// <summary>
    ///   Converts filename to uri, using FileProvider if target API >= 24
    /// </summary>
    /// <remarks>
    ///   Use this only when accessing files with an "external" URI
    /// </remarks>
    class function UriFromFileName(const AFileName: string): Jnet_Uri; static;

    /// <summary>Returns Java Application Context</summary>
    class property Context: JContext read GetJContext;
    /// <summary>Returns Java Application Activity</summary>
    /// <remarks>An exception will be launched if there is no activity, for example a Service</remarks>
    class property Activity: JActivity read GetJActivity;

    /// <summary>Returns Application package name</summary>
    class function GetPackageName: string; static;
  end;

implementation

uses
  Androidapi.Helpers,
  Androidapi.JNI.Os, Androidapi.JNI.Support,
  Androidapi.JNI.Media, Androidapi.JNI.Provider;

{ TAndroidHelperEx }

class function TAndroidHelperEx.CheckBuildAndTarget(const AValue: Integer): Boolean;
begin
  Result := (GetBuildSdkVersion >= AValue) and (GetTargetSdkVersion >= AValue);
end;

class function TAndroidHelperEx.GetBuildSdkVersion: Integer;
begin
   Result := TJBuild_VERSION.JavaClass.SDK_INT;
end;

class function TAndroidHelperEx.GetClass(const APackageClassName: string): Jlang_Class;
begin
  Result := TJLang_Class.JavaClass.forName(StringToJString(APackageClassName), True, TAndroidHelper.Context.getClassLoader);
end;

class function TAndroidHelperEx.GetDefaultIconID: Integer;
begin
  Result := TAndroidHelper.Context.getApplicationInfo.icon;
end;

class function TAndroidHelperEx.GetDefaultNotificationSound: Jnet_Uri;
begin
  Result := TJRingtoneManager.JavaClass.getDefaultUri(TJRingtoneManager.JavaClass.TYPE_NOTIFICATION);
end;

class function TAndroidHelperEx.GetJActivity: JActivity;
begin
  Result :=
{$IF CompilerVersion > 27}
  TAndroidHelper.Activity
{$ELSE}
  SharedActivity
{$ENDIF}
end;

class function TAndroidHelperEx.GetJContext: JContext;
begin
  Result :=
{$IF CompilerVersion > 27}
  TAndroidHelper.Context;
{$ELSE}
  SharedActivityContext;
{$ENDIF}
end;

class function TAndroidHelperEx.GetPackageName: string;
begin
  Result := JStringToString(Context.getPackageName);
end;

class function TAndroidHelperEx.GetTargetSdkVersion: Integer;
var
  LApplicationInfo: JApplicationInfo;
begin
  LApplicationInfo := TAndroidHelper.Context.getPackageManager.getApplicationInfo(TAndroidHelper.Context.getPackageName, 0);
  Result := LApplicationInfo.targetSdkVersion;
end;

class function TAndroidHelperEx.IsActivityForeground: Boolean;
var
  LService: JObject;
  LRunningApps: JList;
  LAppInfo: JActivityManager_RunningAppProcessInfo;
  I: Integer;
begin
  Result := False;
  LService := TAndroidHelper.Context.getSystemService(TJContext.JavaClass.ACTIVITY_SERVICE);
  LRunningApps := TJActivityManager.Wrap(TAndroidHelper.JObjectToID(LService)).getRunningAppProcesses;
  for I := 0 to LRunningApps.size - 1 do
  begin
    LAppInfo := TJActivityManager_RunningAppProcessInfo.Wrap(TAndroidHelper.JObjectToID(LRunningApps.get(I)));
    if LAppInfo.importance = 100 then
    begin
      if LAppInfo.importanceReasonComponent <> nil then
      begin
        if LAppInfo.importanceReasonComponent.getPackageName.equals(TAndroidHelper.Context.getPackageName) then
          Exit(True);
      end
      else if LRunningApps.size = 1 then
        Exit(True);
    end;
  end;
end;

class function TAndroidHelperEx.UriFromFile(const AFile: JFile): Jnet_Uri;
var
  LAuthority: JString;
begin
  if CheckBuildAndTarget(NOUGAT) then
  begin
    LAuthority := StringToJString(JStringToString(TAndroidHelper.Context.getApplicationContext.getPackageName) + '.fileprovider');
    Result := TJFileProvider.JavaClass.getUriForFile(TAndroidHelper.Context, LAuthority, AFile);
  end
  else
    Result := TJnet_uri.JavaClass.fromFile(AFile);
end;

class function TAndroidHelperEx.UriFromFileName(const AFileName: string): Jnet_Uri;
begin
  Result := UriFromFile(TJFile.JavaClass.init(StringToJString(AFileName)));
end;

end.