Question

我正在创建一个函数，用于检索设备的已安装应用程序，应用程序包以及每个应用程序具有的权限。问题是我想将所有这些都放入一个JSON文件中，但我不知道该怎么做，这是我编写的程序，但是它不起作用，请，如果有人知道一些帮助，那就是对我来说很重要！预先感谢。

public static void installedApps(Context context) throws IOException{

    PackageManager pm = context.getPackageManager();
    List<ApplicationInfo> packagelist = pm.getInstalledApplications(PackageManager.GET_META_DATA);

    CharSequence app;
    String pckge;
    String[] permissions;

    for (ApplicationInfo applicationInfo : packagelist){

        app = applicationInfo.loadLabel(context.getPackageManager());
        pckge = applicationInfo.packageName;

        JSONObject json = new JSONObject();

        Log.d("test", "App: "+ applicationInfo.loadLabel(context.getPackageManager()) +", Package: " + applicationInfo.packageName);

        try{
            PackageInfo packageInfo = pm.getPackageInfo(applicationInfo.packageName, PackageManager.GET_PERMISSIONS);

            //Get Permissions
            String[] requestedPermissions = packageInfo.requestedPermissions;

            if(requestedPermissions != null){
                for (int i = 0; i < requestedPermissions.length; i++){

                    Log.d("test", requestedPermissions[i]);

                    permissions = requestedPermissions;

                    JSONArray jsonArray = new JSONArray();

                    try{
                        json.put("app", app);
                        json.put("package", pckge);

                        jsonArray.put(Integer.parseInt("permission"), permissions);


                    }catch (JSONException e) {
                        e.printStackTrace();
                    }


                }
            }
            //primero cargar en un array todos los datos, y pasarlos a un json llamandolos
        }catch (PackageManager.NameNotFoundException e){
            e.printStackTrace();
        }

    }
}

Answer 1

我可能会选择这样的东西：

public static void installedApps(Context context) {
    PackageManager pm = context.getPackageManager();
    List<ApplicationInfo> packagelist = pm.getInstalledApplications(PackageManager.GET_META_DATA);
    JSONObject resp = new JSONObject();

    for (ApplicationInfo applicationInfo : packagelist) {

        CharSequence app = applicationInfo.loadLabel(context.getPackageManager());
        String pckge = applicationInfo.packageName;
        JSONObject json = new JSONObject();

        try {
            //Get Permissions
            PackageInfo packageInfo = pm.getPackageInfo(applicationInfo.packageName, PackageManager.GET_PERMISSIONS);
            String[] requestedPermissions = packageInfo.requestedPermissions;
            if (requestedPermissions != null) {
                json.put("app", app);
                json.put("package", pckge);
                JSONArray jsonArray = new JSONArray();
                for (String requestedPermission : requestedPermissions) {
                    jsonArray.put(requestedPermission);
                }
                json.put("permission", jsonArray);
                resp.put(applicationInfo.name, json); // something to identify each app
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    // return resp.toString() or store in file or whatever you want to do
}

Answer 2

我很确定这行有问题，

permissions = requestedPermissions;

...

jsonArray.put(Integer.parseInt("permission"), permissions);

由于您在顶部定义了permissions数组，因此您将看到最终的requestPermission项经过jsonArray次添加到packageList.size()中。

将permission带入循环。它会解决您的问题。

创建带有数组列表的JSON文件时出现问题

2 个答案: