ask Permission

program start 시에 필요한 permission 물어보고 받아 내기, 실수로 거부되었을 경우 다시 물어보는 logic 있음

 

refer to myHolyBible.apk

 

askPermission();

    ArrayList<String> permissions = new ArrayList<>();
    private final static int ALL_PERMISSIONS_RESULT = 101;
    ArrayList<String> permissionsToRequest;
    ArrayList<String> permissionsRejected = new ArrayList<>();
    
    private void askPermission() {
        permissions.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
        permissions.add(Manifest.permission.INTERNET);
        permissions.add(Manifest.permission.RECORD_AUDIO);
        permissions.add(Manifest.permission.ACCESS_NETWORK_STATE);
        permissions.add(Manifest.permission.ACCESS_FINE_LOCATION);
        permissions.add(Manifest.permission.CAMERA);
        permissions.add(Manifest.permission.MODIFY_AUDIO_SETTINGS);
        permissionsToRequest = findUnAskedPermissions(permissions);
        if (permissionsToRequest.size() != 0) {
            requestPermissions(permissionsToRequest.toArray(new String[0]),
                    ALL_PERMISSIONS_RESULT);
        }
    }

    private ArrayList findUnAskedPermissions(@NonNull ArrayList<String> wanted) {
        ArrayList <String> result = new ArrayList<String>();
        for (String perm : wanted) if (hasPermission(perm)) result.add(perm);
        return result;
    }
    private boolean hasPermission(@NonNull String permission) {
        return (checkSelfPermission(permission) != PackageManager.PERMISSION_GRANTED);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == ALL_PERMISSIONS_RESULT) {
            for (String perms : permissionsToRequest) {
                if (hasPermission(perms)) {
                    permissionsRejected.add(perms);
                }
            }
            if (permissionsRejected.size() > 0) {
                if (shouldShowRequestPermissionRationale(permissionsRejected.get(0))) {
                    String msg = "These permissions are mandatory for the application. Please allow access.";
                    showDialog(msg);
                }
            }
//            else
//                Toast.makeText(mContext, "Permissions not granted.", Toast.LENGTH_LONG).show();
        }
    }
    private void showDialog(String msg) {
        showMessageOKCancel(msg,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        requestPermissions(permissionsRejected.toArray(
                                new String[0]), ALL_PERMISSIONS_RESULT);
                    }
                });
    }
    private void showMessageOKCancel(String message, DialogInterface.OnClickListener okListener) {
        new AlertDialog.Builder(mActivity)
                .setMessage(message)
                .setPositiveButton("OK", okListener)
                .setNegativeButton("Cancel", null)
                .create()
                .show();
    }