更新 抱歉打扰所有人。实际上，问题出在我本地机器上的子域。该子域名列在服务器上的hosts文件中，但不在真实设备上。这一直是个问题。
感谢所有投入时间回答的人。无法标记这些答案＆＃34;正确＆＃34;因为那可能会误导别人。
我试图在本地计算机上访问一些在浏览器中正常工作的Web服务。但是，当我尝试在真实设备中访问相同的服务时！它没有调用订阅功能。我知道这是因为我测试了它而没有在get或post之后调用subscribe函数并且它有效。但Observer / subscribe函数或Promises不能在真实设备上运行。以下是我为此目的使用的代码。请帮忙。 这段代码：
var result = this.http.get('someurl for list of data');
console.log(result);
也适用于浏览器和真实设备。只需点击一下按钮即可显示console.log: [object Object]。
另一方面，Observer不在真实设备上工作，但在浏览器中工作。
var res = this.http.get(this.partnersUrl).subscribe(result => {
console.log(result);
})
上面的代码显示了点击时浏览器控制台中的输出。但是，没有显示来自真实设备的点击输出。我也试过显示一个toast，它可以在浏览器中运行，但不是在真正的设备中。无论是使用ionic cordova run android还是使用离子视图或Ionic Dev app。
离子信息：
cli packages: (C:\Users\danis\AppData\Roaming\nvm\v6.11.5\node_modules)
@ionic/cli-utils : 1.19.0
ionic (Ionic CLI) : 3.19.0
global packages:
cordova (Cordova CLI) : 7.1.0
local packages:
@ionic/app-scripts : 3.1.2
Cordova Platforms : android 6.3.0
Ionic Framework : ionic-angular 3.9.2
System:
Android SDK Tools : 26.0.1
Node : v6.11.5
npm : 3.10.10
OS : Windows 10
Environment Variables:
ANDROID_HOME : C:\Users\danis\AppData\Local\Android\sdk
Misc:
backend : pro
离子插件列表：
cordova-plugin-add-swift-support 1.7.1 "AddSwiftSupport"
cordova-plugin-device 1.1.4 "Device"
cordova-plugin-ionic 2.0.4 "IonicCordova"
cordova-plugin-ionic-webview 1.1.16 "cordova-plugin-ionic-webview"
cordova-plugin-splashscreen 4.0.3 "Splashscreen"
cordova-plugin-whitelist 1.3.1 "Whitelist"
ionic-plugin-keyboard 2.2.1 "Keyboard"
config.xml中
<?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>Some app</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="16" />
<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="1.3.1" />
<plugin name="cordova-plugin-device" spec="1.1.4" />
<plugin name="cordova-plugin-splashscreen" spec="~4.0.1" />
<plugin name="cordova-plugin-ionic-webview" spec="^1.1.11" />
<plugin name="ionic-plugin-keyboard" spec="^2.2.1" />
<engine name="android" spec="~6.3.0" />
<allow-navigation href="http://localhost:8100" />
<allow-navigation href="http://192.168.0.10:8100" />
<allow-navigation href="http://*/*" />
<allow-navigation href="https://*/*" />
<plugin name="cordova-plugin-ionic" spec="^2.0.4">
<variable name="APP_ID" value="84027630" />
<variable name="CHANNEL_NAME" value="Master" />
<variable name="UPDATE_METHOD" value="background" />
<variable name="UPDATE_API" value="https://api.ionicjs.com" />
<variable name="MAX_STORE" value="2" />
</plugin>
</widget>
在此问题得到解决之前，我无法继续前进。任何帮助将受到高度赞赏。提前谢谢。
答案 0 :(得分：0)
请求可能在设备上失败，但由于您没有使用error处理程序，因此无法知道。请尝试以下方法：
var res = this.http.get(this.partnersUrl).subscribe(result => {
console.log(result);
}, error => {console.log("error", error});
答案 1 :(得分：-1)
几个星期前我遇到了同样的问题，修复它的方法是删除cordova-plugin-ionic-webview插件。
cordova plugin rm cordova-plugin-ionic-webview