Android判断包名对应的APP是否存在

    protected boolean isAppExist(String pkgName) {
        ApplicationInfo info;
        try {
            info = getPackageManager().getApplicationInfo(pkgName, 0);
        }
        catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
            info = null;
        }

        return info != null;
    }