android从未安装的apk文件里获取信息(包信息，资源信息)

今天药忘吃喽~ 2022-05-20 03:00 243阅读 0赞

原文:[http://www.cnblogs.com/jayceli/archive/2012/04/12/2444255.html][http_www.cnblogs.com_jayceli_archive_2012_04_12_2444255.html]

下面从一个未安装的android的apk文件获取apk信息

/** 
     * 获取未安装的apk信息 
     *  
     * @param ctx Context
     * @param apkPath apk路径，可以放在SD卡
     * @return 
     */  
     public static AppInfoData getApkFileInfo(Context ctx, String apkPath) 
     {  
         System.out.println(apkPath);  
         File apkFile = new File(apkPath);  
         if (!apkFile.exists() || !apkPath.toLowerCase().endsWith(".apk"))
         {  
             System.out.println("file path is not correct");  
             return null;  
         }  
         
         AppInfoData appInfoData;  
         String PATH_PackageParser = "android.content.pm.PackageParser";  
         String PATH_AssetManager = "android.content.res.AssetManager";  
         try
         {  
             //反射得到pkgParserCls对象并实例化,有参数  
             Class<?> pkgParserCls = Class.forName(PATH_PackageParser);  
             Class<?>[] typeArgs = {String.class};  
             Constructor<?> pkgParserCt = pkgParserCls.getConstructor(typeArgs);  
             Object[] valueArgs = {apkPath};  
             Object pkgParser = pkgParserCt.newInstance(valueArgs);  
             
             //从pkgParserCls类得到parsePackage方法  
             DisplayMetrics metrics = new DisplayMetrics();  
             metrics.setToDefaults();//这个是与显示有关的, 这边使用默认  
             typeArgs = new Class<?>[]{File.class,String.class,  
             DisplayMetrics.class,int.class};  
             Method pkgParser_parsePackageMtd = pkgParserCls.getDeclaredMethod("parsePackage", typeArgs);  
             
             valueArgs=new Object[]{new File(apkPath),apkPath,metrics,0};  
             
             //执行pkgParser_parsePackageMtd方法并返回  
             Object pkgParserPkg = pkgParser_parsePackageMtd.invoke(pkgParser, valueArgs);  
             
             //从返回的对象得到名为"applicationInfo"的字段对象   
             if (pkgParserPkg==null)
             {  
                 return null;  
             }  
             Field appInfoFld = pkgParserPkg.getClass().getDeclaredField("applicationInfo");  
             
             //从对象"pkgParserPkg"得到字段"appInfoFld"的值  
             if (appInfoFld.get(pkgParserPkg)==null)
             {  
                 return null;  
             }  
             ApplicationInfo info = (ApplicationInfo) appInfoFld.get(pkgParserPkg);     
             
             //反射得到assetMagCls对象并实例化,无参  
             Class<?> assetMagCls = Class.forName(PATH_AssetManager);     
             Object assetMag = assetMagCls.newInstance();  
             //从assetMagCls类得到addAssetPath方法  
             typeArgs = new Class[1];  
             typeArgs[0] = String.class;  
             Method assetMag_addAssetPathMtd = assetMagCls.getDeclaredMethod("addAssetPath", typeArgs);  
             valueArgs = new Object[1];  
             valueArgs[0] = apkPath;  
             //执行assetMag_addAssetPathMtd方法  
             assetMag_addAssetPathMtd.invoke(assetMag, valueArgs);  
             
             //得到Resources对象并实例化,有参数  
             Resources res = ctx.getResources();  
             typeArgs = new Class[3];  
             typeArgs[0] = assetMag.getClass();  
             typeArgs[1] = res.getDisplayMetrics().getClass();  
             typeArgs[2] = res.getConfiguration().getClass();  
             Constructor<Resources> resCt = Resources.class.getConstructor(typeArgs);  
             valueArgs = new Object[3];  
             valueArgs[0] = assetMag;  
             valueArgs[1] = res.getDisplayMetrics();  
             valueArgs[2] = res.getConfiguration();  
             //这个是重点
             //得到Resource对象后可以有很多用处
             res = (Resources) resCt.newInstance(valueArgs);  
             
             // 读取apk文件的信息  
             appInfoData = new AppInfoData();  
             if (info!=null)
             {  
                 if (info.icon != 0) 
                 {
                     // 图片存在，则读取相关信息  
                     Drawable icon = res.getDrawable(info.icon);// 图标  
                     appInfoData.setAppicon(icon);  
                 }  
                 if (info.labelRes != 0) 
                 {  
                     String neme = (String) res.getText(info.labelRes);// 名字  
                     appInfoData.setAppname(neme);  
                 }else 
                 {  
                     String apkName=apkFile.getName();  
                     appInfoData.setAppname(apkName.substring(0,apkName.lastIndexOf(".")));  
                 }  
                 String pkgName = info.packageName;// 包名     
                 appInfoData.setApppackage(pkgName);  
             }
             else 
             {  
                 return null;  
             }     
             PackageManager pm = ctx.getPackageManager();  
             PackageInfo packageInfo = pm.getPackageArchiveInfo(apkPath, PackageManager.GET_ACTIVITIES);  
             if (packageInfo != null)
             {  
                 appInfoData.setAppversion(packageInfo.versionName);//版本号  
                 appInfoData.setAppversionCode(packageInfo.versionCode+"");//版本码  
             }  
             return appInfoData;  
         } catch (Exception e)
         {   
             e.printStackTrace();  
         }  
         return null;  
     }

[http_www.cnblogs.com_jayceli_archive_2012_04_12_2444255.html]: http://www.cnblogs.com/jayceli/archive/2012/04/12/2444255.html