Application Error Android

iot-dev01 · August 23, 2018, 9:35am

Hi,
What I’ve done:

Created a new ionic app with

$ ionic start AppName blank

Added Android Platform

ionic cordova platform add android@latest

Run build

ionic cordova build android --prod --release

SIgn the APK like explained in the docs

After opening the app at the device I get following error in the android app:

Application Error
net:ERR_CONNECTION_REFUSED(http://localhost:8080/)

Device Logcat say:

08-23 09:17:18.230 4124-4124/io.ionic.starter I/CordovaLog: Changing log level to DEBUG(3)
08-23 09:17:18.230 4124-4124/io.ionic.starter I/CordovaActivity: Apache Cordova native platform version 7.1.1 is starting
08-23 09:17:18.230 4124-4124/io.ionic.starter D/CordovaActivity: CordovaActivity.onCreate()
08-23 09:17:18.240 4124-4124/io.ionic.starter D/IonicWebViewEngine: Ionic Web View Engine Starting Right Up 1...
08-23 09:17:18.260 4124-4124/io.ionic.starter D/SystemWebViewEngine: CordovaWebView is running on device made by: TPV
08-23 09:17:18.260 4124-4124/io.ionic.starter D/PluginManager: init()
08-23 09:17:18.320 4124-4124/io.ionic.starter D/CordovaWebViewImpl: >>> loadUrl(file:///android_asset/www/index.html)
08-23 09:17:18.340 4124-4124/io.ionic.starter D/CordovaActivity: Started the activity.
    Resumed the activity.
08-23 09:17:18.550 100-190/? W/AudioFlinger: write blocked for 443 msecs, 70 delayed writes, thread 0x40f87008
08-23 09:17:18.560 407-420/? I/ActivityManager: Displayed io.ionic.starter/.MainActivity: +338ms
08-23 09:17:18.570 4124-4124/io.ionic.starter D/CordovaWebViewImpl: onPageDidNavigate(file:///android_asset/www/index.html)
08-23 09:17:18.580 4124-4124/io.ionic.starter D/CordovaWebViewImpl: onPageFinished(file:///android_asset/www/index.html)
    onPageDidNavigate(http://localhost:8080/)
08-23 09:17:18.600 4124-4124/io.ionic.starter D/SystemWebViewClient: CordovaWebViewClient.onReceivedError: Error code=-6 Description=net::ERR_CONNECTION_REFUSED URL=http://localhost:8080/
08-23 09:17:18.660 4124-4124/io.ionic.starter D/CordovaWebViewImpl: onPageFinished(http://localhost:8080/)
08-23 09:17:18.660 4124-4124/io.ionic.starter D/SystemWebChromeClient: data:text/html,chromewebdata: Line 12 : Not allowed to load local resource: file:///android_asset/webkit/android-weberror.png
08-23 09:17:18.660 4124-4124/io.ionic.starter I/chromium: [INFO:CONSOLE(12)] "Not allowed to load local resource: file:///android_asset/webkit/android-weberror.png", source: data:text/html,chromewebdata (12)
08-23 09:17:18.710 553-553/? I/[S]IMEService: onBindInput()
    onFinishInput()

Device running Android 4.4.4

My config.xml

<?xml version='1.0' encoding='utf-8'?>
<widget id="io.ionic.starter" version="0.0.1" xmlns="http://www.w3.org/ns/widgets" xmlns:cdv="http://cordova.apache.org/ns/1.0">
    <name>LedStripControl</name>
    <description>An awesome Ionic/Cordova app.</description>
    <author email="hi@ionicframework" href="http://ionicframework.com/">Ionic Framework Team</author>
    <content src="index.html" />
    <access origin="*" />
    <allow-intent href="http://*/*" />
    <allow-intent href="https://*/*" />
    <allow-intent href="tel:*" />
    <allow-intent href="sms:*" />
    <allow-intent href="mailto:*" />
    <allow-intent href="geo:*" />
    <preference name="ScrollEnabled" value="false" />
    <preference name="android-minSdkVersion" value="19" />
    <preference name="BackupWebStorage" value="none" />
    <preference name="SplashMaintainAspectRatio" value="true" />
    <preference name="FadeSplashScreenDuration" value="300" />
    <preference name="SplashShowOnlyFirstTime" value="false" />
    <preference name="SplashScreen" value="screen" />
    <preference name="SplashScreenDelay" value="3000" />
    <platform name="android">
        <allow-intent href="market:*" />
        <icon density="ldpi" src="resources/android/icon/drawable-ldpi-icon.png" />
        <icon density="mdpi" src="resources/android/icon/drawable-mdpi-icon.png" />
        <icon density="hdpi" src="resources/android/icon/drawable-hdpi-icon.png" />
        <icon density="xhdpi" src="resources/android/icon/drawable-xhdpi-icon.png" />
        <icon density="xxhdpi" src="resources/android/icon/drawable-xxhdpi-icon.png" />
        <icon density="xxxhdpi" src="resources/android/icon/drawable-xxxhdpi-icon.png" />
        <splash density="land-ldpi" src="resources/android/splash/drawable-land-ldpi-screen.png" />
        <splash density="land-mdpi" src="resources/android/splash/drawable-land-mdpi-screen.png" />
        <splash density="land-hdpi" src="resources/android/splash/drawable-land-hdpi-screen.png" />
        <splash density="land-xhdpi" src="resources/android/splash/drawable-land-xhdpi-screen.png" />
        <splash density="land-xxhdpi" src="resources/android/splash/drawable-land-xxhdpi-screen.png" />
        <splash density="land-xxxhdpi" src="resources/android/splash/drawable-land-xxxhdpi-screen.png" />
        <splash density="port-ldpi" src="resources/android/splash/drawable-port-ldpi-screen.png" />
        <splash density="port-mdpi" src="resources/android/splash/drawable-port-mdpi-screen.png" />
        <splash density="port-hdpi" src="resources/android/splash/drawable-port-hdpi-screen.png" />
        <splash density="port-xhdpi" src="resources/android/splash/drawable-port-xhdpi-screen.png" />
        <splash density="port-xxhdpi" src="resources/android/splash/drawable-port-xxhdpi-screen.png" />
        <splash density="port-xxxhdpi" src="resources/android/splash/drawable-port-xxxhdpi-screen.png" />
    </platform>
    <platform name="ios">
        <allow-intent href="itms:*" />
        <allow-intent href="itms-apps:*" />
        <icon height="57" src="resources/ios/icon/icon.png" width="57" />
        <icon height="114" src="resources/ios/icon/icon@2x.png" width="114" />
        <icon height="40" src="resources/ios/icon/icon-40.png" width="40" />
        <icon height="80" src="resources/ios/icon/icon-40@2x.png" width="80" />
        <icon height="120" src="resources/ios/icon/icon-40@3x.png" width="120" />
        <icon height="50" src="resources/ios/icon/icon-50.png" width="50" />
        <icon height="100" src="resources/ios/icon/icon-50@2x.png" width="100" />
        <icon height="60" src="resources/ios/icon/icon-60.png" width="60" />
        <icon height="120" src="resources/ios/icon/icon-60@2x.png" width="120" />
        <icon height="180" src="resources/ios/icon/icon-60@3x.png" width="180" />
        <icon height="72" src="resources/ios/icon/icon-72.png" width="72" />
        <icon height="144" src="resources/ios/icon/icon-72@2x.png" width="144" />
        <icon height="76" src="resources/ios/icon/icon-76.png" width="76" />
        <icon height="152" src="resources/ios/icon/icon-76@2x.png" width="152" />
        <icon height="167" src="resources/ios/icon/icon-83.5@2x.png" width="167" />
        <icon height="29" src="resources/ios/icon/icon-small.png" width="29" />
        <icon height="58" src="resources/ios/icon/icon-small@2x.png" width="58" />
        <icon height="87" src="resources/ios/icon/icon-small@3x.png" width="87" />
        <icon height="1024" src="resources/ios/icon/icon-1024.png" width="1024" />
        <splash height="1136" src="resources/ios/splash/Default-568h@2x~iphone.png" width="640" />
        <splash height="1334" src="resources/ios/splash/Default-667h.png" width="750" />
        <splash height="2208" src="resources/ios/splash/Default-736h.png" width="1242" />
        <splash height="1242" src="resources/ios/splash/Default-Landscape-736h.png" width="2208" />
        <splash height="1536" src="resources/ios/splash/Default-Landscape@2x~ipad.png" width="2048" />
        <splash height="2048" src="resources/ios/splash/Default-Landscape@~ipadpro.png" width="2732" />
        <splash height="768" src="resources/ios/splash/Default-Landscape~ipad.png" width="1024" />
        <splash height="2048" src="resources/ios/splash/Default-Portrait@2x~ipad.png" width="1536" />
        <splash height="2732" src="resources/ios/splash/Default-Portrait@~ipadpro.png" width="2048" />
        <splash height="1024" src="resources/ios/splash/Default-Portrait~ipad.png" width="768" />
        <splash height="960" src="resources/ios/splash/Default@2x~iphone.png" width="640" />
        <splash height="480" src="resources/ios/splash/Default~iphone.png" width="320" />
        <splash height="2732" src="resources/ios/splash/Default@2x~universal~anyany.png" width="2732" />
    </platform>
    <plugin name="cordova-plugin-whitelist" spec="1.3.3" />
    <plugin name="cordova-plugin-device" spec="2.0.2" />
    <plugin name="cordova-plugin-splashscreen" spec="5.0.2" />
    <plugin name="cordova-plugin-ionic-webview" spec="^2.0.0" />
    <plugin name="cordova-plugin-ionic-keyboard" spec="^2.0.5" />
    <engine name="android" spec="7.1.1" />
</widget>

Ionic Environment:

Ionic:

   ionic (Ionic CLI)  : 4.1.1 (C:\Users\nlandgraf\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework    : ionic-angular 3.9.2
   @ionic/app-scripts : 3.1.11

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.1.1
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.2, cordova-plugin-ionic-webview 2.0.3, (and 3 other plugins)

System:

   Android SDK Tools : 26.1.1 (C:\Users\nlandgraf\AppData\Local\Android\Sdk)
   NodeJS            : v8.11.2 (C:\Program Files\nodejs\node.exe)
   npm               : 6.4.0
   OS                : Windows 10

Can anyone help?

NiranjanGowdaCM · August 23, 2018, 9:53am

To best of my knowledge and experience ionic works well with android version 5+ and so on…

Sujan12 · August 23, 2018, 11:06am

does not support Android <5. You will have to downgrade this to a 1.x version.

iot-dev01 · August 23, 2018, 12:29pm

Thanks for the fast replys, for now i figured out hat Version 3.20.0 was the version I used before.
So I downgrade and now all is working well again.

Sujan12 · August 25, 2018, 12:34pm

That is surprising, as the Ionic CLI version has nothing to with what your app id doing and loading.

Anyway, for future readers of this topic:
If the device you are testing on is using Android 4.x (e.g. Android 4.4 KitKat), this article might explain what is going on: https://ionic.zone/debug/ionic-and-android-4