我在我的应用程序中使用地理围栏并基于地理围栏事件(Enter或Exit)我想执行一些操作。地理围栏documentation说,一旦你设置地理围栏,它将自动触发事件,你可以用IntentService捕获这些事件。为此我做了如下的意图服务:
Geo fence transitions intent service.Java
public class GeofenceTransitionsIntentService extends IntentService {
Handler mHandler;
public GeofenceTransitionsIntentService() {
super("GeofenceTransitionsIntentService");
mHandler = new Handler();
}
@Override
public void onCreate() {
super.onCreate();
Log.e("JK-->>","service started!");
}
@Override
protected void onHandleIntent(Intent intent) {
Log.e("JK-->>","onHandel--->>");
GeofencingEvent geofencingEvent = GeofencingEvent.fromIntent(intent);
if (geofencingEvent.hasError()) {
Log.e("JK-->>","geofenceEvent has error!");
return;
}
int geofenceTransitionType = geofencingEvent.getGeofenceTransition();
if (geofenceTransitionType == Geofence.GEOFENCE_TRANSITION_ENTER) {
Log.e("JK-->>","enter!");
mHandler.post(new DisplayToast(this,"Enter"));
} else if (geofenceTransitionType == Geofence.GEOFENCE_TRANSITION_EXIT) {
mHandler.post(new DisplayToast(this,"Exit"));
Log.e("JK-->>","exit");
}
}
public class DisplayToast implements Runnable {
private final Context mContext;
String mText;
public DisplayToast(Context mContext, String text){
this.mContext = mContext;
mText = text;
}
public void run(){
Toast.makeText(mContext, mText, Toast.LENGTH_SHORT).show();
}
}
}
现在,问题是,当应用程序打开时(无论前景或背景)我进入或退出地理围栏它工作正常并向我显示一个toast消息和logcat显示日志但是当我从最近的应用程序中删除应用程序时没有显示toast消息对我或没有日志显示在logcat中。
我试图在谷歌上找到解决方案,但大多数答案建议使用该服务,但如果我没有错,那么IntentService在工作完成后自动停止并在收到任何意图时自动启动。因此,我认为使用IntentService执行此任务更有效。
更新我正在使用以下代码行注册地理围栏。
geofencingClient.addGeofences(getGeofencingRequest(),getGeofencePendingIntent());
在getGeofencePendingIntent()中,我使用以下代码行启动intent服务。
private PendingIntent getGeofencePendingIntent() {
if(geofencePendingIntent != null)
return geofencePendingIntent;
Intent in = new Intent(SetProfileOnlineActivity.this,GeofenceTransitionsIntentService.class);
geofencePendingIntent = PendingIntent.getService(SetProfileOnlineActivity.this,111451,in,PendingIntent.FLAG_UPDATE_CURRENT);
return geofencePendingIntent;
}
此服务将始终运行:
转到项目java - >右键单击 - >新建 - >服务 - >服务名称看守员
watchman.Java
public class watchman extends Service
{
NotificationManager mNotifyManager;
NotificationCompat.Builder mBuilder;
NotificationChannel notificationChannel;
String NOTIFICATION_CHANNEL_ID = "1";
public watchman() { }
@Override
public void onCreate()
{
try
{
mNotifyManager = (NotificationManager) getApplicationContext().getSystemService(NOTIFICATION_SERVICE);
mBuilder = new NotificationCompat.Builder(this, null);
mBuilder.setContentTitle("Insta Promo")
.setContentText("We are ready to help you.")
.setSmallIcon(R.drawable.ic_launcher_background);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
{
notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "My Notifications", NotificationManager.IMPORTANCE_HIGH);
// Configure the notification channel.
notificationChannel.setDescription("Channel description");
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.RED);
notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
notificationChannel.enableVibration(true);
notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
mNotifyManager.createNotificationChannel(notificationChannel);
}
else
{
mBuilder.setContentTitle("Insta Promo")
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setColor(ContextCompat.getColor(this, R.color.colorAccent))
.setVibrate(new long[]{100, 250})
.setLights(Color.YELLOW, 500, 5000)
.setAutoCancel(true);
}
mBuilder.setChannelId(NOTIFICATION_CHANNEL_ID);
mNotifyManager.notify(1, mBuilder.build());
startForeground(1, mBuilder.build());
}
catch(Exception e)
{
Log.d(TAG, "EXCEPTION IN SHOWING NOTIFICATION xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx...\n");
Log.e("MY_APP", "exception", e);
}
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
new Thread(new Runnable()
{
public void run()
{
while (true)
{
try
{
Log.d(TAG, "Thread : Running again...\n");
Thread.sleep(10000);
}
catch (InterruptedException e)
{
Log.d(TAG, "Thread : InterruptedException Error in service...\n");
}
}
}
}).start();
return START_STICKY;
}
@Override
public void onDestroy()
{
super.onDestroy();
}
@Override
public IBinder onBind(Intent intent)
{
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented");
}
}
当您将其创建为服务时,它将在清单文件中自动注册,无需更新清单文件。
从主要活动或从您想要开始的任何地方,它称之为
Log.d(TAG, " Good to Go \n");
Log.d(TAG, "Starting Service from main...\n");
Intent intent = new Intent(MainActivity.this, watchman.class);
startService(intent);
Log.d(TAG, "Main has started the service...\n");
现在你甚至将它从最近删除了...,它将在内存中始终为你运行,要检查它继续关注logcat。希望能帮助到你。它的项目从4.1开始到最新的8.0奥托
用于显示通知我正在使用振动权限,因此也可以为您提供清单文件。
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.rushi.oreo">
<uses-permission android:name="android.permission.VIBRATE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service
android:name=".watchman"
android:enabled="true"
android:exported="true" />
</application>
</manifest>
希望它真的能帮助你或其他人。
但请注意,将服务作为前台会影响手机的电池续航时间。并且将服务作为前景也对用户来说是烦人的,因为它始终显示通知并且不能被关闭。
您可以更好地使用JobScheduler或Firebase JobDispatcher来安排后台工作。
我找到了答案......我的代码没有问题,IntentService也运行正常,但错误在于测试。我在android Oreo运行设备上测试我的应用程序。
在Android oreo谷歌已经更新了他们的政策,在前台他们将发送任意次数的位置更新,但在后台,他们将在一小时内发送位置更新几次。它背后的主要原因是拯救设备的赌博生活。
有关android oreo位置更新的更多信息,您可以查看this文档。