background 相关问题

背景通常是指容器元素内容背后的呈现 - 通常在网页,Windows窗体或其他UI呈现介质上。

Smart Slider 3 背景视频自动播放问题

我正在尝试通过 Smart Slider 3 插件禁用服务器上托管的 MP4 背景短视频的自动播放功能,以便它们仅在鼠标悬停时播放。不幸的是,尽管尝试了

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iOS 后台计时器

我希望在我的iOS应用程序中,当应用程序在后台运行以及应用程序关闭时启动计时器。计时器必须每 30 分钟检查一次是否有新通知。在计时器中

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尝试使其响应时背景颜色会缩小,我还想在调整大小时将我的项目居中,无法弄清楚

@import url('https://fonts.googleapis.com/css2?family=Raleway:ital,wght@0,100..900;1,100..900&family=Roboto:ital,wght@0,100;0,300;0,400; 0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&

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背景覆盖不适用于 IOS 上的仅一个 div

尽管具有相同的确切样式,但第二个 div 不会在移动设备上显示完整的彩虹渐变图像,我真的不明白为什么。我希望底部框中的渐变是相同的...

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尝试在后台任务 Flutter 中检索时,Workmanager inputData 为空

我在 Flutter 的 Workmanager 中传递和检索 inputData 时遇到问题。我试图在注册任务时发送一些数据(如 id 和日期),但是当我尝试访问

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渐变背景向下?

我的 html 页面顶部有一个渐变背景,我希望它保持在顶部,这样它就不会超出我的导航栏。它一直停留在顶部,直到我放入图像,背景跟随图像......

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当我想按下按钮并下载时,如何使用Python和Selenium在后台自动运行网站(chrome)?

我想在 selenium 的帮助下用 python 创建一个自动化程序,打开一个网站,导航到我按下按钮并下载数据的部分。如果程序没有运行...

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任务调度程序与后台运行的服务

要求 - 我需要每 10 分钟进行一些检查(系统资源、许可、门、注册表项等),然后采取一些操作(例如启动应用程序)。我需要重复这个过程......

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html - 如何使图像保留在背景的特定部分

我有一个背景图像,CSS 中的大小被覆盖,因此它会随着浏览器窗口大小的调整而调整大小。但是当我放置图像时,如何定位它们以使它们保持在某个位置一致......

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具有清晰背景的DialogFragment(未变暗)

我试图让 DialogFragment 的背景完全清晰。 将样式项 android:windowIsFloating 设置为 true (默认), DialogFragment 准确地显示了我的方式...

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React-Native 位置跟踪

当我的 React Native 应用程序在后台运行时,如何启用连续位置跟踪? 我尝试过使用expo-location、Expo TaskManager和react-native-location,但它们都没有

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在Android中以编程方式从drawable创建textview背景

我必须在Android TextView上以编程方式设置背景 我使用下面的代码。它不起作用,而且还给了我 nullpointerexception 错误。 best_deals = (TextView) findViewById(R...

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Flutter - 如何从后台任务播放铃声并让用户能够停止它?

我想在我的 flutter 应用程序在后台时播放铃声,并让用户停止它。 我想在用户选择的特定时间间隔后播放铃声(例如 3 分钟或 58

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即使应用程序终止,是否也可以定期执行功能?

我正在构建一个国家追踪应用程序。用户安装应用程序,通过多个API应用程序获取用户所在国家/地区并将其保存在核心数据中。问题是 BGTask 不可靠。在过去的三天里我...

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背景图像周围的空白

背景图像周围出现空白。 代码如下: .div 类{ 背景:#00b5ff url(../img/cart.png) 不重复; 背景位置:34px 4px; } 这幸福...

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如何在Unity中动态改变字体背景

目前字体阴影的酒红色部分使用轮廓和底纹。我不知道如何完成背景的玫瑰红色部分。如果添加同级图像组件,则需要裁剪

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.NET MAUI 全尺寸背景图像(覆盖元素)

由于 .NET MAUI 是 Xamarin 的继承者,我正在尝试将 Xamarin 布局移植到新的 Maui 版本。 relativelayout 已从毛伊岛删除。我使用relativelayout将GUI定位到...

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在 iOS 上响应本机后台 API 调用

我有一个应用程序,每隔一分钟左右就会对 API 进行递归调用,当应用程序处于活动状态时它工作正常,但在后台时无法工作。 我在 Android 上测试了相同的应用程序,甚至在

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adnroid 中启动后台进程或线程的方式,它将不间断地运行

adnroid 有没有办法启动后台进程或线程, 关闭应用程序后哪个会运行而不停止? 在此过程中,我想放置一个接收器来接收来自其他人的消息...

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我的地理围栏正在工作,但地理围栏过渡对象为空

Android.Manifest.xml Android.Manifest.xml <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" /> <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="32" /> <application android:allowBackup="true" android:dataExtractionRules="@xml/data_extraction_rules" android:fullBackupContent="@xml/backup_rules" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/Theme.Geo" tools:targetApi="31"> <activity android:name=".MainActivity" android:exported="true"> </activity> <uses-library android:name="org.apache.http.legacy" android:required="false" /> <service android:name=".MapsActivity" android:foregroundServiceType="location" /> <!-- Any inner elements would go here. --> <!-- Before you run your application, you need a Google Maps API key. To get one, follow the directions here: https://developers.google.com/maps/documentation/android-sdk/get-api-key Once you have your API key (it starts with "AIza"), define a new property in your project's local.properties file (e.g. MAPS_API_KEY=Aiza...), and replace the "YOUR_API_KEY" string in this file with "${MAPS_API_KEY}". --> <meta-data android:name="com.google.android.geo.API_KEY" android:value="${MAPS_API_KEY}" /> <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" /> <activity android:name=".MapsActivity" android:exported="true" android:label="@string/title_activity_maps"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <receiver android:name=".GeofenceBroadcastReceiver" android:exported="true" android:permission="TODO"> <intent-filter> <action android:name="com.google.android.gms.location.ACTION_GEOFENCE_TRANSITION" /> </intent-filter> </receiver> </application> </manifest> MapsActivity package com.example.geo import android.os.Build import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import androidx.annotation.RequiresApi import com.google.android.gms.maps.CameraUpdateFactory import com.google.android.gms.maps.GoogleMap import com.google.android.gms.maps.OnMapReadyCallback import com.google.android.gms.maps.SupportMapFragment import com.google.android.gms.maps.model.LatLng import com.google.android.gms.maps.model.MarkerOptions import com.example.geo.databinding.ActivityMapsBinding import android.Manifest import android.app.NotificationChannel import android.app.NotificationManager import android.app.PendingIntent import android.content.Intent import android.content.pm.PackageManager import android.graphics.Color import android.location.Location import android.os.Looper import androidx.core.app.ActivityCompat import androidx.core.app.NotificationCompat import androidx.core.content.ContextCompat import com.google.android.gms.common.internal.Constants import com.google.android.gms.location.FusedLocationProviderClient import com.google.android.gms.location.Geofence import com.google.android.gms.location.GeofencingClient import com.google.android.gms.location.GeofencingRequest import com.google.android.gms.location.LocationCallback import com.google.android.gms.location.LocationRequest import com.google.android.gms.location.LocationResult import com.google.android.gms.location.LocationServices import com.google.android.gms.maps.model.CircleOptions import com.google.android.gms.maps.model.Marker const val CHANNEL_ID = "GeoChannel" class MapsActivity : AppCompatActivity(), OnMapReadyCallback { private lateinit var mMap: GoogleMap private lateinit var binding: ActivityMapsBinding private lateinit var geofencingClient: GeofencingClient private val REQUEST_CODE = 0 private val geo_Id = "MyGeofence" private val entry_latitude = 26.267775 private val entry_longitude = 81.505404 private val geoRad = 282F private val expiration_time = 10000000000000 private lateinit var fusedLocationClient: FusedLocationProviderClient private lateinit var locationCallback: LocationCallback private var permissions = arrayOf( Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.POST_NOTIFICATIONS ) private var geofencelist : MutableList<Geofence> = mutableListOf() @RequiresApi(Build.VERSION_CODES.Q) override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = ActivityMapsBinding.inflate(layoutInflater) setContentView(binding.root) //Notification channel if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { // Create the NotificationChannel. val name = "Work" val descriptionText = "geofencing" val importance = NotificationManager.IMPORTANCE_HIGH val mChannel = NotificationChannel(CHANNEL_ID, name, importance) mChannel.description = descriptionText // Register the channel with the system. You can't change the importance // or other notification behaviors after this. val notificationManager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager notificationManager.createNotificationChannel(mChannel) //mChannel. } val textTitle = "You hae checked in " val textContent = "dggdgfdf" // Create an explicit intent for an Activity in your app. val intent = Intent(this, MainActivity::class.java).apply { flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK } val pendingIntent: PendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_IMMUTABLE) // val builder = NotificationCompat.Builder(this, CHANNEL_ID) // .setSmallIcon(R.drawable.notification_icon) // .setContentTitle("My notification") // .setContentText("Hello World!") // .setPriority(NotificationCompat.PRIORITY_DEFAULT) // // Set the intent that fires when the user taps the notification. // .setContentIntent(pendingIntent) // .setAutoCancel(true) //Location fusedLocationClient = LocationServices.getFusedLocationProviderClient(this) //Location permission when { permissions.all { ContextCompat.checkSelfPermission(this, it) == PackageManager.PERMISSION_GRANTED } -> { // Fine and coarse location permissions granted } permissions.any { ActivityCompat.shouldShowRequestPermissionRationale(this, it) } -> { // Show rationale for fine/coarse location // showInContextUI(...) } else -> { // Request fine/coarse location permissions ActivityCompat.requestPermissions(this, permissions, REQUEST_CODE) } } //For background location // if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) { // // Check for background location on API 29+ // ActivityCompat.requestPermissions( // this, // arrayOf(Manifest.permission.ACCESS_BACKGROUND_LOCATION), // REQUEST_CODE // ) // } if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) { if ( ContextCompat.checkSelfPermission( this, Manifest.permission.ACCESS_BACKGROUND_LOCATION ) == PackageManager.PERMISSION_GRANTED ) { // All permissions granted, perform action // performAction(...) } // ActivityCompat.shouldShowRequestPermissionRationale( // this, // Manifest.permission.ACCESS_BACKGROUND_LOCATION // ) -> { // // Show rationale for background location // //showInContextUI(...) else {// Request background location permission ActivityCompat.requestPermissions( this, arrayOf(Manifest.permission.ACCESS_BACKGROUND_LOCATION), REQUEST_CODE ) } } //Geofencing geofencingClient = LocationServices.getGeofencingClient(this) geofencelist.add(Geofence.Builder() // Set the request ID of the geofence. This is a string to identify this // geofence. .setRequestId(geo_Id) // Set the circular region of this geofence. .setCircularRegion( entry_latitude, entry_longitude, geoRad ) // Set the expiration duration of the geofence. This geofence gets automatically // removed after this period of time. .setExpirationDuration(expiration_time) // Set the transition types of interest. Alerts are only generated for these // transition. We track entry and exit transitions in this sample. .setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER or Geofence.GEOFENCE_TRANSITION_EXIT ) .setLoiteringDelay(10000) // Create the geofence. .build()) val geofencePendingIntent: PendingIntent by lazy { val intent = Intent(this, GeofenceBroadcastReceiver::class.java) // intent.action = ACTION_GEOFENCE_EVENT val flags = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) { PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE } else { PendingIntent.FLAG_UPDATE_CURRENT } PendingIntent.getBroadcast(this, 0, intent, flags) } geofencingClient.addGeofences(getGeofencingRequest(), geofencePendingIntent).run { addOnSuccessListener { // Geofences added val fence = LatLng(entry_latitude, entry_longitude) mMap.addMarker(MarkerOptions().position(fence).title("Marker in center")) mMap.moveCamera(CameraUpdateFactory.newLatLng(fence)) val geofenceCircle = mMap.addCircle( CircleOptions() .center(LatLng(entry_latitude, entry_longitude)) .radius(geoRad.toDouble()) .strokeColor(Color.GREEN) .fillColor(Color.argb(64, 0, 125, 0)) ) } addOnFailureListener { // Failed to add geofences // ... } } // Obtain the SupportMapFragment and get notified when the map is ready to be used. val mapFragment = supportFragmentManager .findFragmentById(R.id.map) as SupportMapFragment mapFragment.getMapAsync(this) } /** * Manipulates the map once available. * This callback is triggered when the map is ready to be used. * This is where we can add markers or lines, add listeners or move the camera. In this case, * we just add a marker near Sydney, Australia. * If Google Play services is not installed on the device, the user will be prompted to install * it inside the SupportMapFragment. This method will only be triggered once the user has * installed Google Play services and returned to the app. */ override fun onMapReady(googleMap: GoogleMap) { mMap = googleMap enableMyLocation() // Live location fusedLocationClient = LocationServices.getFusedLocationProviderClient(this) locationCallback = object : LocationCallback() { override fun onLocationResult(locationResult: LocationResult) { for (location in locationResult.locations) { val cur = LatLng(location.latitude, location.longitude) mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(cur,20f)) } } } startLocationUpdates() } override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) { super.onRequestPermissionsResult(requestCode, permissions, grantResults) when (requestCode) { REQUEST_CODE -> { // If request is cancelled, the result arrays are empty. if ((grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED)) { // Permission is granted. Continue the action or workflow // in your app. } else { // Explain to the user that the feature is unavailable because // the feature requires a permission that the user has denied. // At the same time, respect the user's decision. Don't link to // system settings in an effort to convince the user to change // their decision. } return } // Add other 'when' lines to check for other // permissions this app might request. else -> { // Ignore all other requests. } } } private fun getGeofencingRequest(): GeofencingRequest { return GeofencingRequest.Builder().apply { setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER) addGeofences(geofencelist) }.build() } private fun startLocationUpdates() { // ... request location permissions ... val locationRequest = LocationRequest.create().apply { interval = 100// Update interval in milliseconds fastestInterval = 500 priority = LocationRequest.PRIORITY_HIGH_ACCURACY } if (ActivityCompat.checkSelfPermission( this, Manifest.permission.ACCESS_FINE_LOCATION ) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission( this, Manifest.permission.ACCESS_COARSE_LOCATION ) != PackageManager.PERMISSION_GRANTED ) { // TODO: Consider calling // ActivityCompat#requestPermissions // here to request the missing permissions, and then overriding // public void onRequestPermissionsResult(int requestCode, String[] permissions, // int[] grantResults) // to handle the case where the user grants the permission. See the documentation // for ActivityCompat#requestPermissions for more details. return } fusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, Looper.getMainLooper()) } private fun enableMyLocation() { // Check if location permissions are granted if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) { // Enable the blue dot on the map if permissions are granted mMap.isMyLocationEnabled = true } else { // Request location permissions if not granted ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), REQUEST_CODE) } } companion object { internal const val ACTION_GEOFENCE_EVENT = "com.google.android.gms.location.ACTION_GEOFENCE_TRANSITION" } } const val TAGED = "TAGED" GeofenceBroadcastReceiver package com.example.geo import android.content.BroadcastReceiver import android.content.ContentValues.TAG import android.content.Context import android.content.Intent import android.content.pm.PackageManager import android.util.Log import androidx.core.app.ActivityCompat import androidx.core.app.NotificationManagerCompat import com.google.android.gms.location.Geofence import com.google.android.gms.location.GeofenceStatusCodes import com.google.android.gms.location.GeofencingEvent import android.Manifest import androidx.core.app.NotificationCompat import com.example.geo.MapsActivity.Companion.ACTION_GEOFENCE_EVENT class GeofenceBroadcastReceiver : BroadcastReceiver() { override fun onReceive(context: Context?, intent: Intent?) { Log.d(TAGED, "GeofenceBroadcastReceiver triggered") // if (intent != null) { // if (intent.action == ACTION_GEOFENCE_EVENT) { val geofencingEvent = intent?.let { GeofencingEvent.fromIntent(it) } if (geofencingEvent != null && geofencingEvent.hasError()) { val errorMessage = GeofenceStatusCodes.getStatusCodeString(geofencingEvent.errorCode) Log.e(TAGED, "Geofencing error: $errorMessage") return } val geofenceTransition = geofencingEvent?.geofenceTransition Log.d(TAGED, "Geofence transition: $geofenceTransition") if (geofenceTransition == Geofence.GEOFENCE_TRANSITION_ENTER || geofenceTransition == Geofence.GEOFENCE_TRANSITION_EXIT ) { // Get the geofences that were triggered. A single event can trigger multiple geofences. val triggeringGeofences = geofencingEvent.triggeringGeofences // Get the transition details as a String. val geofenceTransitionDetails = triggeringGeofences?.let { getGeofenceTransitionDetails( context!!, geofenceTransition, it ) } // Send notification and log the transition details. if (geofenceTransitionDetails != null) { sendNotification(context!!, geofenceTransitionDetails) } if (geofenceTransitionDetails != null) { Log.i(TAGED, geofenceTransitionDetails) } } else { Log.e(TAGED, "Geofence transition not handled: $geofenceTransition") } // } // } } private fun sendNotification(context:Context, message: String?) { val builder = NotificationCompat.Builder(context, CHANNEL_ID) .setSmallIcon(R.drawable.notification_icon) // Replace with your notification icon .setContentTitle("Geofence Alert") .setContentText(message) .setPriority(NotificationCompat.PRIORITY_HIGH) .setAutoCancel(true) val notificationManager = NotificationManagerCompat.from(context) if (ActivityCompat.checkSelfPermission(context, Manifest.permission.POST_NOTIFICATIONS) != PackageManager.PERMISSION_GRANTED) { // Consider requesting the missing permission here return } val notificationId = 123 // You can use a unique ID for each notification notificationManager.notify(notificationId, builder.build()) } private fun getGeofenceTransitionDetails( context: Context,geofenceTransition: Int, triggeringGeofences: List<Geofence> ): String { val geofenceTransitionString = when (geofenceTransition) { Geofence.GEOFENCE_TRANSITION_ENTER -> "Entered" Geofence.GEOFENCE_TRANSITION_EXIT -> "Exited" Geofence.GEOFENCE_TRANSITION_DWELL -> "Dwell" else -> "Unknown Transition" } // Get the Ids of each geofence that was triggered. val triggeringGeofencesIdsList = mutableListOf<String>() for (geofence in triggeringGeofences) { triggeringGeofencesIdsList.add(geofence.requestId) } val triggeringGeofencesIdsString = triggeringGeofencesIdsList.joinToString(", ") return "Geofence transition: $geofenceTransitionString - $triggeringGeofencesIdsString" } } 我尝试获取日志消息,我收到了这些消息 2024-08-25 23:30:36.829 13719-13719 TAGED                   com.example.geo                      D  GeofenceBroadcastReceiver triggered 2024-08-25 23:30:36.829 13719-13719 TAGED                   com.example.geo                      D  Geofence transition: null 2024-08-25 23:30:36.829 13719-13719 TAGED                   com.example.geo                      E  Geofence transition not handled: null  why I 1。检查意图操作 <receiver android:name=".GeofenceBroadcastReceiver" android:exported="true"> <intent-filter> <action android:name="com.google.android.gms.location.ACTION_GEOFENCE_TRANSITION" /> </intent-filter> </receiver> 在您的 GeofenceBroadcastReceiver 中,检查以下内容: if (intent?.action == "com.google.android.gms.location.ACTION_GEOFENCE_TRANSITION") { // Your geofence processing code here } 2。检查地理围栏事件错误 val geofencingEvent = GeofencingEvent.fromIntent(intent) if (geofencingEvent.hasError()) { val errorMessage = GeofenceStatusCodes.getStatusCodeString(geofencingEvent.errorCode) Log.e(TAGED, "Geofencing error: $errorMessage") return }

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