Simple kotlin app under android studio that makes a loadURL to a local address:-
The function often fails, probably due to local net latency with:
Web Page not available
The web page at http://192.168.1.144/apikey/webcam could not be loaded because:
net: ERR_ADDRESS_UNREACHABLE
I have
android:usesCleartextTraffic="true"
<uses-permission android:name="android.permission.INTERNET"/>
in the manifest, and the loadurl often is fine
In order to capture the error and provide a message an
onReceivedError()
action is used.
It never fires
Is the syntax of the onReceivedError correct? It refers to WebView rather than my instance myWebview (which causes a reference error), and I've moved the scope around to no effect.
The Android Studio comment says that the function is never used. A big hint, but I can't see which scope to place it in.
I've copied this from other examples.
I'd really welcome some help please
Robin
}
}
The function often fails, probably due to local net latency with:
Web Page not available
The web page at http://192.168.1.144/apikey/webcam could not be loaded because:
net: ERR_ADDRESS_UNREACHABLE
I have
android:usesCleartextTraffic="true"
<uses-permission android:name="android.permission.INTERNET"/>
in the manifest, and the loadurl often is fine
In order to capture the error and provide a message an
onReceivedError()
action is used.
It never fires
Is the syntax of the onReceivedError correct? It refers to WebView rather than my instance myWebview (which causes a reference error), and I've moved the scope around to no effect.
The Android Studio comment says that the function is never used. A big hint, but I can't see which scope to place it in.
I've copied this from other examples.
I'd really welcome some help please
Robin
Code:
package com.example.lilaccottagebell
import android.app.NotificationChannel
import android.app.NotificationManager
import android.os.Build
import android.os.Bundle
import android.webkit.WebResourceError
import android.webkit.WebResourceRequest
import android.webkit.WebView
import android.webkit.WebViewClient
import android.widget.Button
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
// Create the NotificationChannel
val name = getString(R.string.channel_name)
val descriptionText = getString(R.string.channel_description)
val importance = NotificationManager.IMPORTANCE_DEFAULT
val CHANNEL_ID = "only_channel"
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)
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
// Create channel to show notifications.
val channelId = getString(R.string.default_notification_channel_id)
val channelName = getString(R.string.default_notification_channel_name)
val notificationManager = getSystemService(NotificationManager::class.java)
notificationManager?.createNotificationChannel(NotificationChannel(channelId,
channelName, NotificationManager.IMPORTANCE_HIGH))
}
// If a notification message is tapped, any data accompanying the notification
// message is available in the intent extras. In this sample the launcher
// intent is fired when the notification is tapped, so any accompanying data would
// be handled here. If you want a different intent fired, set the click_action
// field of the notification message to the desired intent. The launcher intent
// is used when no click_action is specified.
//
// Handle possible data accompanying notification message.
// [START handle_data_extras]
// [END handle_data_extras]
val myWebView: WebView = findViewById(R.id.webview)
/*myWebView.loadUrl("https://amazon.co.uk")*/
myWebView.webViewClient = WebViewClient()
WebView.setWebContentsDebuggingEnabled(true)
/*5 March 2021*/
myWebView.clearCache(true)
myWebView.loadUrl("http://192.168.1.144/apikey/webcam")
val disable_button: Button = findViewById(R.id.disable)
disable_button.setOnClickListener {
myWebView.loadUrl("http://192.168.1.144/apikey/disable")
}
fun onReceivedError(
view: WebView,
request: WebResourceRequest,
error: WebResourceError
) {
Toast.makeText(this, "Webcam not reachable", Toast.LENGTH_SHORT).show()
}
}
}}
}