将Java类中的iBeacon专业ID传递给Android Studio中的活动

Question

我正在尝试从iBeacon以字符串的形式获取专业ID，并将其传递给名为“ LoginActivity.java”的活动，以便随后可以通过Volley POST将其与登录信息用户名和密码一起传递给我的PHP脚本，脚本将首先检查信标值是否为NULL，如果是，则返回错误，表明信标不在范围内，因此它们无法登录。

到目前为止，我已经获取了Major ID并将其转换为字符串，但是在创建意图“无法解析构造函数”时遇到错误。 我用下面的<<<<ERROR标记了发生错误的行。 （快结束了）。

package com.mcrlogs.pp.test;

/**
 * Created by myuser on 15/01/2017.
 */

import android.app.Application;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.bluetooth.BluetoothClass;
import android.content.Context;
import android.content.Intent;

import com.estimote.sdk.Beacon;
import com.estimote.sdk.BeaconManager;
import com.estimote.sdk.Region;

import java.util.List;
import java.util.UUID;


public class BeaconChecker extends Application {

    private BeaconManager beaconManager;

    public void showNotification(String title, String message) {
        Intent notifyIntent = new Intent(this, MainActivity.class);
        notifyIntent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivities(this, 0,
                new Intent[] { notifyIntent }, PendingIntent.FLAG_UPDATE_CURRENT);
        Notification notification = new Notification.Builder(this)
                .setSmallIcon(R.mipmap.security)
                .setContentTitle(title)
                .setContentText(message)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .build();
        notification.defaults |= Notification.DEFAULT_SOUND;
        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(1, notification);
    }

    @Override
    public void onCreate() {
        super.onCreate();

        beaconManager = new BeaconManager(getApplicationContext());

        beaconManager.connect(new BeaconManager.ServiceReadyCallback() {
            @Override
            public void onServiceReady() {
                beaconManager.startMonitoring(new Region(
                        "monitored region",
                        UUID.fromString("B9407F30-F5F8-466E-AFF9-25556B57FE6D"),
                        null, null));
            }
        });

        beaconManager.setMonitoringListener(new BeaconManager.MonitoringListener() {
            @Override
            public void onEnteredRegion(Region region, List<Beacon> list) {
                String iBeaconID = convertIBeaconIDToString(list.get(0).getMajor());
                System.out.println(iBeaconID);
                showNotification(
                        "MCR Beacon Detected!",
                        "Login enabled.");
            }

            private String convertIBeaconIDToString (int major) {
                String iBeaconID = "";
                iBeaconID = iBeaconID.concat(Integer.toString(major));
                return iBeaconID;
                Intent i = new Intent(this, LoginActivity.class); <<<<ERROR
                i.putExtra("iBeaconID",iBeaconID);
            }

            @Override
            public void onExitedRegion(Region region) {
                // could add an "exit" notification too if you want (-:
            }
        });

    }

}

Answer 1

尝试更改：

Intent i = new Intent(this, LoginActivity.class);

至：

Intent i = new Intent(BeaconChecker.this, LoginActivity.class);

这说明您所引用的this是满足Intent的构造函数要求的Application类。