我正在使用Angular / Firebase在Ionic中构建应用程序。
我想在以前运行良好的Android设备上测试该应用。但是，最近由于出现错误，我无法运行它。
$ ionic cordova run android --device --prod
这将导致错误：
Running app-scripts build: --prod --platform android --target cordova
[15:36:05] build prod started ...
[15:36:05] clean started ...
[15:36:05] clean finished in 6 ms
[15:36:05] copy started ...
[15:36:06] deeplinks started ...
[15:36:06] deeplinks finished in 270 ms
[15:36:06] ngc started ...
[15:36:19] ngc finished in 12.61 s
[15:36:19] preprocess started ...
[15:36:19] preprocess finished in 1 ms
[15:36:19] webpack started ...
[15:36:19] copy finished in 13.84 s
[15:37:27] webpack finished in 68.39 s
[15:37:27] uglify started ...
[15:37:27] sass started ...
Without `from` option PostCSS could generate wrong source map and will not find Browserslist config. Set it to CSS file path or to `undefined` to prevent this warning.
[15:37:29] sass finished in 1.66 s
[15:37:29] cleancss started ...
[15:37:31] cleancss finished in 2.77 s
[15:37:56] uglify finished in 28.99 s
[15:37:56] postprocess started ...
[15:37:56] postprocess finished in 25 ms
[15:37:56] lint started ...
[15:37:56] build prod finished in 110.64 s
> cordova run android --device
Android Studio project detected
(node:64964) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'find' of undefined
at Object.resolveParent (C:\Users\Simon K\AppData\Roaming\npm\node_modules\cordova\node_modules\cordova-common\src\util\xml-helpers.js:207:26)
at C:\Users\Simon K\AppData\Roaming\npm\node_modules\cordova\node_modules\cordova-common\src\ConfigChanges\ConfigChanges.js:345:53
at Array.forEach (<anonymous>)
at is_conflicting (C:\Users\Simon K\AppData\Roaming\npm\node_modules\cordova\node_modules\cordova-common\src\ConfigChanges\ConfigChanges.js:337:17)
at PlatformMunger.add_config_changes (C:\Users\Simon K\AppData\Roaming\npm\node_modules\cordova\node_modules\cordova-common\src\ConfigChanges\ConfigChanges.js:188:33)
at C:\Users\Simon K\AppData\Roaming\npm\node_modules\cordova\node_modules\cordova-lib\src\cordova\prepare.js:130:32
at _fulfilled (C:\xampp\htdocs\project x\anonymous-social\platforms\android\cordova\node_modules\q\q.js:854:54)
at self.promiseDispatch.done (C:\xampp\htdocs\project x\anonymous-social\platforms\android\cordova\node_modules\q\q.js:883:30)
at Promise.promise.promiseDispatch (C:\xampp\htdocs\project x\anonymous-social\platforms\android\cordova\node_modules\q\q.js:816:13)
at C:\xampp\htdocs\project x\anonymous-social\platforms\android\cordova\node_modules\q\q.js:624:44
(node:64964) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:64964) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
我不确定为什么会这样。我尝试先删除node_modules文件夹，然后再进行npm install，但这并不能解决。我认为可能是android问题？由于我仍然可以基于iOS ...
有什么想法吗？谢谢！
设法（暂时？）通过删除android并重新安装...来解决此问题
cordova platform remove android
cordova platform add android
希望这可以在将来对某人有所帮助。
您可以编辑文件
cordova\node_modules\cordova-common\src\util\xml-helpers.js:207:26
并添加
if(doc!==null) //add this line
parent = doc.find(selector);
它也有助于编译和安装android应用