Android Runtime Permission

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ...............................
        ...............................

        // Handle run time permission
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (getAllPermission()) {
                proceedAfterPermission();
            }
        } else
            proceedAfterPermission();
    }


    private boolean getAllPermission() {

        int readPhoneState = ContextCompat.checkSelfPermission(mContext, Manifest.permission.READ_PHONE_STATE);
        int readExternalStorage = ContextCompat.checkSelfPermission(mContext, Manifest.permission.READ_EXTERNAL_STORAGE);
        int writeExternalStorage = ContextCompat.checkSelfPermission(mContext, Manifest.permission.WRITE_EXTERNAL_STORAGE);


        List<String> listPermissionsNeeded = new ArrayList<>();

        if (readPhoneState != PackageManager.PERMISSION_GRANTED) {
            listPermissionsNeeded.add(Manifest.permission.READ_PHONE_STATE);
        }

        if (readExternalStorage != PackageManager.PERMISSION_GRANTED) {
            listPermissionsNeeded.add(Manifest.permission.READ_EXTERNAL_STORAGE);
        }

        if (writeExternalStorage != PackageManager.PERMISSION_GRANTED) {
            listPermissionsNeeded.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
        }

        if (!listPermissionsNeeded.isEmpty()) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                requestPermissions(listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), REQUEST_ID_MULTIPLE_PERMISSIONS);
                return false;
            }
        }
        return true;
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == REQUEST_ID_MULTIPLE_PERMISSIONS) {
            //check if all permissions are granted
            boolean allgranted = false;
            for (int grantResult : grantResults) {
                if (grantResult == PackageManager.PERMISSION_GRANTED) {
                    allgranted = true;
                } else {
                    allgranted = false;
                    break;
                }
            }

            if (allgranted) {
                proceedAfterPermission();
            } else {
                AlertDialog.Builder builder = new AlertDialog.Builder(SignInActivity.this);
                builder.setTitle("Need Multiple Permissions");
                builder.setMessage("This app needs Phone and Storage permissions.");
                builder.setPositiveButton("Grant", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                        getAllPermission();
                    }
                });
                builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                        finish();
                    }
                });
                builder.show();
            }
        }
    }

    @SuppressLint({"MissingPermission", "HardwareIds"})
    private void proceedAfterPermission() {

        //Do your suff...
        TelephonyManager mTelephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        assert mTelephonyManager != null;
        deviceImei = mTelephonyManager.getDeviceId();
        Log.e(TAG, "IMEI: " + deviceImei);
    }