android 通過PackageInfo擷取ActivityInfo

// 擷取PackageManagerPackageManager pm = getPackageManager();// 擷取PackageInfo。PackageManager.GET_UNINSTALLED_PACKAGES與PackageManager.GET_ACTIVITIES好像不能同時使用，會報錯。 List<PackageInfo> pkgs=pm.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);// 下面代碼擷取不到對應的ActivityInfo,actInfo總是null,//ActivityInfo[] actInfo = pkgs.get(0).activities;//這樣就能擷取ActivityInfo了，之後可以獲得Activity的nameActivityInfo[] actInfo = getPackageManager().getPackageInfo(pkgs.get(0).packageName, PackageManager.GET_ACTIVITIES).activities;// 擷取PackageManagerPackageManager pm = getPackageManager();// 擷取PackageInfo。PackageManager.GET_UNINSTALLED_PACKAGES與PackageManager.GET_ACTIVITIES好像不能同時使用，會報錯。 List<PackageInfo> pkgs=pm.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);// 下面代碼擷取不到對應的ActivityInfo,actInfo總是null,//ActivityInfo[] actInfo = pkgs.get(0).activities;//這樣就能擷取ActivityInfo了，之後可以獲得Activity的nameActivityInfo[] actInfo = getPackageManager().getPackageInfo(pkgs.get(0).packageName, PackageManager.GET_ACTIVITIES).activities;