I'm getting an exception "Failure delivering result ResultInfo". about contact_picker HOT 8 CLOSED

// Copyright 2017 Michael Goderbauer. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package net.goderbauer.flutter.contactpicker;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.provider.ContactsContract;

import java.util.HashMap;

import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
import io.flutter.plugin.common.MethodChannel.Result;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugin.common.PluginRegistry.Registrar;

import static android.app.Activity.RESULT_OK;

public class ContactPickerPlugin implements MethodCallHandler, PluginRegistry.ActivityResultListener {
  public static void registerWith(Registrar registrar) {
    final MethodChannel channel = new MethodChannel(registrar.messenger(), "contact_picker");
    ContactPickerPlugin instance = new ContactPickerPlugin(registrar.activity());
    registrar.addActivityResultListener(instance);
    channel.setMethodCallHandler(instance);
  }

    private ContactPickerPlugin(Activity activity) {
        this.activity = activity;
    }

  private static int PICK_CONTACT = 2015;

  private Activity activity;
  private Result pendingResult = null;

  @Override
  public void onMethodCall(MethodCall call, Result result) {
    if (call.method.equals("selectContact")) {
      if (pendingResult != null) {
        pendingResult.error("multiple_requests", "Cancelled by a second request.", null);
        pendingResult = null;
      }
      pendingResult = result;

      Intent i = new Intent(Intent.ACTION_PICK, ContactsContract.CommonDataKinds.Phone.CONTENT_URI);
      activity.startActivityForResult(i, PICK_CONTACT);
    } else {
      //result.notImplemented();
	 pendingResult = null;
    }
  }

  @Override
  public boolean onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode != PICK_CONTACT) {
      return false;
    }
    if (resultCode != RESULT_OK) {
      pendingResult.success(null);
      pendingResult = null;
    }
    if(pendingResult != null){
    Uri contactUri = data.getData();
    Cursor cursor = activity.getContentResolver().query(contactUri, null, null, null, null);
    cursor.moveToFirst();

    int phoneType = cursor.getInt(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.TYPE));
    String customLabel = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.LABEL));
    String label = (String) ContactsContract.CommonDataKinds.Email.getTypeLabel(activity.getResources(), phoneType, customLabel);
    String number = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
    String fullName = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));

    HashMap<String, Object> phoneNumber = new HashMap<>();
    phoneNumber.put("number", number);
    phoneNumber.put("label", label);

    HashMap<String, Object> contact = new HashMap<>();
    contact.put("fullName", fullName);
    contact.put("phoneNumber", phoneNumber);

    pendingResult.success(contact);
    pendingResult = null;
    return true;
  }
  else{
    pendingResult = null;
    return false;
  }
  }
}

E/AndroidRuntime( 4660): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=2015, result=0, data=null} to activity {nl.boomrang.boomrangapp/nl.boomrang.boomrangapp.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.net.Uri android.content.Intent.getData()' on a null object reference
E/AndroidRuntime( 4660): 	at android.app.ActivityThread.deliverResults(ActivityThread.java:4324)
E/AndroidRuntime( 4660): 	at android.app.ActivityThread.handleSendResult(ActivityThread.java:4367)
E/AndroidRuntime( 4660): 	at android.app.ActivityThread.-wrap19(Unknown Source:0)
E/AndroidRuntime( 4660): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1649)
E/AndroidRuntime( 4660): 	at android.os.Handler.dispatchMessage(Handler.java:105)
E/AndroidRuntime( 4660): 	at android.os.Looper.loop(Looper.java:164)
E/AndroidRuntime( 4660): 	at android.app.ActivityThread.main(ActivityThread.java:6541)
E/AndroidRuntime( 4660): 	at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 4660): 	at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
E/AndroidRuntime( 4660): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
E/AndroidRuntime( 4660): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.net.Uri android.content.Intent.getData()' on a null object reference
E/AndroidRuntime( 4660): 	at net.goderbauer.flutter.contactpicker.ContactPickerPlugin.onActivityResult(ContactPickerPlugin.java:66)
E/AndroidRuntime( 4660): 	at io.flutter.app.FlutterPluginRegistry.onActivityResult(FlutterPluginRegistry.java:184)
E/AndroidRuntime( 4660): 	at io.flutter.app.FlutterActivityDelegate.onActivityResult(FlutterActivityDelegate.java:137)
E/AndroidRuntime( 4660): 	at io.flutter.app.FlutterActivity.onActivityResult(FlutterActivity.java:122)
E/AndroidRuntime( 4660): 	at android.app.Activity.dispatchActivityResult(Activity.java:7235)
E/AndroidRuntime( 4660): 	at android.app.ActivityThread.deliverResults(ActivityThread.java:4320)
E/AndroidRuntime( 4660): 	... 9 more