地理围栏未触发

Posted 2023-04-14

【中文标题】地理围栏未触发

【英文标题】：Geofence not triggering

【发布时间】：2016-01-01 10:55:34

【问题描述】：

我正在尝试在我的 APP 上实现Geofence，但问题是当我在我标记的地方时没有触发。

我所做的是从Place Picker 设置Latitude 和Longitude。

我得到的值很好，因为我把它放在 google maps 上，而且这个地方是正确的，因为我读过很多答案，人们从 lat/long 设置了错误的值 em>。

我有两个课程：GeofenceSingleton.class 和 GeofenceTransitionsIntentService。

GeofenceSingleton.class 看起来像：

public class GeofenceSingleton implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, ResultCallback<Status> 

private GoogleApiClient googleApiClient;
private static GeofenceSingleton _singleInstance;
private static Context appContext;
private static final String ERR_MSG = "Application Context is not set!! " +
        "Please call GeofenceSngleton.init() with proper application context";
private PendingIntent mGeofencePendingIntent;
private static ArrayList<Geofence> mGeofenceList;


private GeofenceSingleton() 
    if (appContext == null)
        throw new IllegalStateException(ERR_MSG);

    this.googleApiClient = new GoogleApiClient.Builder(this.appContext)
            .addApi(LocationServices.API)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .build();
    this.googleApiClient.connect();
    mGeofenceList = new ArrayList<Geofence>();


/**
 * @param applicationContext
 */
public static void init(Context applicationContext) 
    appContext = applicationContext;


public static GeofenceSingleton getInstance() 
    if (_singleInstance == null)
        synchronized (GeofenceSingleton.class) 
            if (_singleInstance == null)
                _singleInstance = new GeofenceSingleton();
        
    return _singleInstance;


@Override
public void onConnected(Bundle bundle) 



@Override
public void onConnectionSuspended(int i) 



@Override
public void onConnectionFailed(ConnectionResult connectionResult) 



public void addGeofence(Location location, String uid) 
    mGeofenceList.add(new Geofence.Builder()
            .setRequestId(uid)
            .setCircularRegion(
                    location.getLatitude(),
                    location.getLongitude(),
                    500
            )
            .setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER)
            .setExpirationDuration(1000000)
            .build());


private GeofencingRequest getGeofencingRequest() 
    GeofencingRequest.Builder builder = new GeofencingRequest.Builder();
    builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER);
    builder.addGeofences(mGeofenceList);
    return builder.build();


private PendingIntent getGeofencePendingIntent() 
     // Reuse the PendingIntent if we already have it.
    if (mGeofencePendingIntent != null) 
        return mGeofencePendingIntent;
    
    Intent intent = new Intent(appContext, GeofenceSingleton.class);
    // We use FLAG_UPDATE_CURRENT so that we get the same pending intent back when calling
    // addGeofences() and removeGeofences().
    return PendingIntent.getService(appContext, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);


public void startGeofencing() 
    if (!googleApiClient.isConnected()) 
        Toast.makeText(appContext, "API client not connected", Toast.LENGTH_SHORT).show();
        return;
    

    LocationServices.GeofencingApi.addGeofences(
            googleApiClient,
     // The GeofenceRequest object.
            getGeofencingRequest(),
    // A pending intent that that is reused when calling removeGeofences(). This
    // pending intent is used to generate an intent when a matched geofence
    // transition is observed.
            getGeofencePendingIntent()
    ).setResultCallback(this); // Result processed in onResult().
    Toast.makeText(appContext,"Geofencing started", Toast.LENGTH_LONG).show();




public void removeGeofence()
    LocationServices.GeofencingApi.removeGeofences(
            googleApiClient,
// This is the same pending intent that was used in addGeofences().
            getGeofencePendingIntent()
    );


@Override
public void onResult(Status status) 
    if (status.isSuccess()) 
// Update state and save in shared preferences.

        Toast.makeText(
                appContext,
                "YO",
                Toast.LENGTH_SHORT
        ).show();
     else 
        Toast.makeText(
                appContext,
                "NOO",
                Toast.LENGTH_SHORT
        ).show();
    

还有GeofenceTransitionsIntentService

public class GeofenceTransitionsIntentService extends IntentService 

private static final String TAG = "Geofence-Service";
private Handler handler;
SharedPreferences sp;
SharedPreferences.Editor editor;
String EmailName, MessageEmail;
Context mContext;
Boolean EmailSent = false;

public GeofenceTransitionsIntentService() 
    super(TAG);


@Override
public void onCreate() 
    super.onCreate();
    this.mContext = this;
    sp = PreferenceManager.getDefaultSharedPreferences(this);
    handler = new Handler();


@Override
protected void onHandleIntent(Intent intent) 

    final GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent);
    if (geofencingEvent.hasError()) 
        Log.e(TAG, "Error in geofencing event");
        return;
    

      // Get the transition type.
    final int geofenceTransition = geofencingEvent.getGeofenceTransition();

      // Test that the reported transition was of interest.
    if (geofenceTransition == 1) 

        handler.post(new Runnable() 
            @Override
            public void run() 
                Toast.makeText(getApplicationContext(), "Entered", Toast.LENGTH_SHORT).show();
                sendNotification();
            
        );
        Log.i(TAG, "Entered");


    

    else 
        // Log the error.
        handler.post(new Runnable() 
            @Override
            public void run() 
                Toast.makeText(getApplicationContext(), "Sorry you are out", Toast.LENGTH_SHORT).show();
            
        );
        Log.e(TAG, String.valueOf(geofenceTransition));
    



private void sendNotification() 
    Toast.makeText(GeofenceTransitionsIntentService.this, "HEEEEEEEY I'M IN", Toast.LENGTH_SHORT).show();

在我的MainActivity 我有这个：

GeofenceSingleton.init(this); //If I don't call this the class doesn't work
this.geofenceSingleton = GeofenceSingleton.getInstance();

然后我如下构建一个Geofence：

Location geofence = new Location("");
geofence.setLatitude(Double.parseDouble(latitude));
geofence.setLongitude(Double.parseDouble(longitude));
geofenceSingleton.addGeofence(geofence, GeofenceKey);
geofenceSingleton.startGeofencing();

注意事项

我在manifest.xml 上添加了<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

我将service 声明为<service android:name=".GeofenceTransitionsIntentService"/>

我在build.gradle 上添加了这一行：compile 'com.google.android.gms:play-services:7.8.0'

它只显示Toast.makeText(appContext,"YO",Toast.LENGTH_SHORT).show();那是因为状态是成功，并且还显示Toast.makeText(appContext,"Geofencing started", Toast.LENGTH_LONG).show();意味着它已经开始了。

问题

为什么我的IntentService 从来没有被调用过？

我在我家的Lat/Long 上测试了它，既然我在上面，它应该被触发，不是吗？

【问题讨论】：

成功了吗？顺便说一句，我用这 3 个文件创建了一个新项目，然后尝试执行它并且它有效，所以我也会为你工作。

也许您没有“进入”该区域，这就是没有事件的原因。创建地理围栏时，您就在里面。为了在您创建区域并且您已经在里面时触发它，您需要这样设置它：builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER);

【参考方案1】：

它永远不会起作用，因为你正在做的是

Intent intent = new Intent(appContext, GeofenceSingleton.class);

将意图传递给 GeofenceSingleton ？

你需要做的是

Intent intent = new Intent(appContext, GeofenceTransitionsIntentService.class);

【讨论】：

@Skizo-ozᴉʞS 我可以收到 ENTER NOTIFICATION 但 EXIT NOTIFICATION 没有被解雇

@Skizo-ozᴉʞS 另外，当我给出的半径小于 25 米时，我没有收到 ENTER NOTIFICATION 任何想法为什么它不起作用？？？

退出通知不会触发，因为您有 setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER) 您还需要添加 GEOFENCE_TRANSITION_ENTER 以获得退出转换

【参考方案2】：

如果您的 Intent 已经使用正确的类构建（请参阅 varunkr's answer），您还需要确保该服务也包含在您的 AndroidManifest.xml 中。

<application
    ...

    <service android:name=".GeofencingTransitionIntentService" />

【参考方案3】：

确保您的服务和广播接收在清单中启用了这些属性。

  android:enabled="true"
  android:exported="true"

【讨论】：

导出它不需要分配权限吗？

【参考方案4】：

正如我已经回答 here 一样，Geofence API 类似于被动位置接收器，即当您需要 Geofence 工作时，您必须同时从 LocationServices.FusedLocationApi.requestLocationUpdates 请求坐标。