有没有办法在android中猜测包名？

Question

在所有包名中，我希望它只显示一个包名，其中包含＆＃34; top20s＆＃34;在里面。

我该怎么做？

// get all installed app package names and guess the package name
        // you are trying to uninstall from apk name.
        List<PackageInfo> packList = getPackageManager()
                .getInstalledPackages(0);
        for (int i = 0; i < packList.size(); i++) {
            PackageInfo packInfo = packList.get(i);
            if ((packInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
                String listAllInstalledPackages = packInfo.applicationInfo
                        .loadLabel(getPackageManager()).toString();
                Toast.makeText(getApplicationContext(),
                        listAllInstalledPackages, Toast.LENGTH_SHORT)
                        .show();