网上关于"获取未安装的APK图标"的文章满天飞,但都是转帖,运行后的效果却是获取到Android的默认小机器人图标.那个暴寒.... ? 现提供解决方法如下,废话不说,上效果图,见代码: ? 本方法需要使用到Java反射的知识,具体请参考: http://java.sun.com/developer/technicalArticles/ALT/Reflection/index.html 借鉴的Android源码出处: XXoo这个链接好长ooXX
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/** * 获取未安装的apk信息 * * @param ctx * @param apkPath * @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("文件路径不正确"); 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(); 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; }?
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转自：http://blog.csdn.net/sodino/archive/2011/03/01/6215224.aspx