Ionic android build 生成未签名的 apk，但不要安装在我的 android 8.1.0 中

Question

当我提供 ionic 应用程序时，它可以在浏览器中运行，但用于 android 的构建 apk 不起作用。apk 无法安装。

我试过 ionic cordova build android --release

带有以下消息的构建通过

Checking Java JDK and Android SDK versions
ANDROID_SDK_ROOT=undefined (recommended setting)
ANDROID_HOME=C:\Users\ruban\AppData\Local\Android\Sdk (DEPRECATED)
Subproject Path: CordovaLib
Subproject Path: app
> Task :app:preBuild UP-TO-DATE
> Task :CordovaLib:preBuild UP-TO-DATE
> Task :CordovaLib:preReleaseBuild UP-TO-DATE
> Task :CordovaLib:checkReleaseManifest UP-TO-DATE
> Task :CordovaLib:processReleaseManifest UP-TO-DATE
> Task :app:preReleaseBuild UP-TO-DATE`

D:\myApp\platforms\android\app\src\main\res\drawable-land-hdpi\screen.png: Error: The drawable "screen" in drawable-land-hdpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-land-ldpi\screen.png: Error: The drawable "screen" in drawable-land-ldpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-land-mdpi\screen.png: Error: The drawable "screen" in drawable-land-mdpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-land-xhdpi\screen.png: Error: The drawable "screen" in drawable-land-xhdpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-land-xxhdpi\screen.png: Error: The drawable "screen" in drawable-land-xxhdpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-land-xxxhdpi\screen.png: Error: The drawable "screen" in drawable-land-xxxhdpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-port-hdpi\screen.png: Error: The drawable "screen" in drawable-port-hdpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-port-ldpi\screen.png: Error: The drawable "screen" in drawable-port-ldpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-port-mdpi\screen.png: Error: The drawable "screen" in drawable-port-mdpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-port-xhdpi\screen.png: Error: The drawable "screen" in drawable-port-xhdpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-port-xxhdpi\screen.png: Error: The drawable "screen" in drawable-port-xxhdpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]
D:\myApp\platforms\android\app\src\main\res\drawable-port-xxxhdpi\screen.png: Error: The drawable "screen" in drawable-port-xxxhdpi has no declaration in the base drawable folder or in a drawable-densitydpi folder; this can lead to crashes when the drawable is queried in a configuration that does not match this qualifier [MissingDefaultResource]

该构建会创建未在我的 android 设备上安装的未签名 apk 文件。

离子信息命令显示以下消息离子：

   ionic (Ionic CLI)             : 4.12.0 (C:\Users\ruban\AppData\Roaming\nvm\v10.15.3\node_modules\ionic)
   Ionic Framework               : @ionic/angular 4.1.2
   @angular-devkit/build-angular : 0.13.7
   @angular-devkit/schematics    : 7.2.4
   @angular/cli                  : 7.3.7
   @ionic/angular-toolkit        : 1.4.1

科尔多瓦：

   cordova (Cordova CLI) : 9.0.0
   Cordova Platforms     : android 8.0.0
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 3.1.2, (and 4 other plugins)

系统：

   Android SDK Tools : 26.1.1 (C:\Users\ruban\AppData\Local\Android\Sdk)
   NodeJS            : v10.15.3 (C:\Program Files\nodejs\node.exe)
   npm               : 6.4.1
   OS                : Windows 10

Answer 1

我认为你还没有生成资源。尝试以下操作：

ionic cordova resources