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如何从方法通道中检索字符串列表

flutter android

Yeahia2508 · 技术社区 · 6 年前

 new MethodChannel(getFlutterView(), CHANNEL).setMethodCallHandler(
        new MethodChannel.MethodCallHandler() {
          @Override
          public void onMethodCall(MethodCall call, MethodChannel.Result result) {
            if (call.method.equals("getContacts")) {
              contacts = getContactList();

              if (contacts != null) {
                result.success(contacts);
              } else {
                result.error("UNAVAILABLE", "not avilable", null);
              }
            } else {
              result.notImplemented();
            }
          }
        });

颤振时:

final Iterable result = await platform.invokeMethod('getContacts');
  contactNumber = result.toList();

但我没有从弗利特那里得到任何回应。如何从原生android检索到flutter的电话号码?

2 回复 | 直到 6 年前

Gregga17 6 年前

我是这样做的。

Android本机代码(带字符串的发送列表):

new MethodChannel(getFlutterView(), CHANNEL).setMethodCallHandler(
            new MethodCallHandler() {
                @Override
                public void onMethodCall(MethodCall call, Result result) {
                    if (call.method.equals("samples.flutter.io/contact")) {
                        final List<String> list = new ArrayList<>();
                        list.add("Phone number 1");
                        list.add("Phone number 2");
                        list.add("Phone number 3");

                        result.success(list);
                    } else {
                        result.notImplemented();
                    }
                }
            }
    );

颤振代码:

List<dynamic> phoneNumbersList = <dynamic>[];

Future<List<String>> _getList() async {
   phoneNumbersList = await methodChannel.invokeMethod('samples.flutter.io/contact');
   print(phoneNumberList[0]);
   return phoneNumberList;
}

Yeahia2508 6 年前

我用另一种简单的方法解决了我的问题。也许对其他人有帮助。

package com.y34h1a.test;
import android.database.Cursor;
import android.os.Bundle;
import io.flutter.app.FlutterActivity;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugins.GeneratedPluginRegistrant;
import android.provider.ContactsContract;

public class MainActivity extends FlutterActivity {

  private static final String CHANNEL = "samples.flutter.io/contact";
  String phoneNumbers = "";

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

      new MethodChannel(getFlutterView(), CHANNEL).setMethodCallHandler(
              new MethodChannel.MethodCallHandler() {
                  @Override
                  public void onMethodCall(MethodCall call, MethodChannel.Result result) {
                      if (call.method.equals("getContacts")) {
                          phoneNumbers = getPhoneNumbers();

                          if (phoneNumbers != null) {
                              result.success(phoneNumbers);
                          } else {
                              result.error("UNAVAILABLE", "Contacts not found", null);
                          }
                      } else {
                          result.notImplemented();
                      }
                  }
              });
  }

  String getPhoneNumbers(){

      Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null,null, null);
      while (phones.moveToNext())
      {
          String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

          if (phoneNumber != null)
            phoneNumbers = phoneNumbers + phoneNumber + ",";

      }
      return phoneNumbers;
  }
}

颤振代码:

static const platform = const MethodChannel('samples.flutter.io/contact');

final String result = await platform.invokeMethod('getContacts');
List<String> phoneNumbers = result.split(",");