将 iBeacon Main ID 从 Java Class 传递到 Android Studio 中的活动

Question

我正在尝试从 iBeacon 获取主要 ID 作为字符串并将其传递给名为"LoginActivity.java"的活动，以便我可以通过 Volley POST 将其传递给我的 PHP 脚本以及登录信息用户名和密码，脚本将首先检查信标值是否为 NULL，如果是这样，则返回信标不在范围内的错误，因此他们无法登录.

到目前为止，我已经获得了主要 ID 并将其转换为字符串，但在创建意图"无法解析构造函数"时出现错误。我在下面用<<<<ERROR标记了我收到错误的行。（快要结束了）。

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);

自：

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

这阐明了您引用的this是满足构造函数对Intent的要求的Application类。