[Android Software/Hacking General [Developers Only]] imp4ler:
I tried using this tool with com.touchtype.swiftkey 5.0.0.72 to insert my own emoji, which worked in v4.3.2.235, but I get this:

I: Checking whether sources has changed...
I: Checking whether resources has changed...
I: Building resources...
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values\styles.xml:59: error: Error retrieving parent for item: No resource found that matches the given name 'Widget.AppCompat.Base'.
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values\styles.xml:99: error: Error retrieving parent for item: No resource found that matches the given name 'Widget.AppCompat.Base'.
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values\styles.xml:146: error: Error retrieving parent for item: No resource found that matches the given name 'Widget.AppCompat.Base'.
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values\styles.xml:176: error: Error retrieving parent for item: No resource found that matches the given name 'Widget.AppCompat.Base'.
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values\styles.xml:192: error: Error retrieving parent for item: No resource found that matches the given name 'Widget.AppCompat.Base.DropDownItem'.
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values\styles.xml:218: error: Error retrieving parent for item: No resource found that matches the given name 'Widget.AppCompat.Base'.
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values\styles.xml:225: error: Error retrieving parent for item: No resource found that matches the given name 'Widget.AppCompat.Light.Base'.
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values\styles.xml:242: error: Error retrieving parent for item: No resource found that matches the given name 'TextAppearance.AppCompat.Base'.
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values\styles.xml:275: error: Error retrieving parent for item: No resource found that matches the given name 'Widget.AppCompat.Base'.
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values-v14\styles.xml:50: error: Error retrieving parent for item: No resource found that matches the given name 'Widget.AppCompat.Base'.
C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res\values\styles.xml:467: error: Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Base'.
Exception in thread "main" brut.androlib.AndrolibException: brut.androlib.AndrolibException: brut.common.BrutException: could not exec command: [aapt, p, --min-sdk-version, 8, --target-sdk-version, 19, -F, C:\Users\imp4ler\AppData\Local\Temp\APKTOOL5296650842728907002.tmp, -0, arsc, -I, C:\Users\imp4ler\apktool\framework\1.apk, -S, C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res, -M, C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\AndroidManifest.xml]
at brut.androlib.Androlib.buildResourcesFull(Androlib.java:358)
at brut.androlib.Androlib.buildResources(Androlib.java:283)
at brut.androlib.Androlib.build(Androlib.java:206)
at brut.androlib.Androlib.build(Androlib.java:176)
at brut.apktool.Main.cmdBuild(Main.java:228)
at brut.apktool.Main.main(Main.java:79)
Caused by: brut.androlib.AndrolibException: brut.common.BrutException: could not exec command: [aapt, p, --min-sdk-version, 8, --target-sdk-version, 19, -F, C:\Users\imp4ler\AppData\Local\Temp\APKTOOL5296650842728907002.tmp, -0, arsc, -I, C:\Users\imp4ler\apktool\framework\1.apk, -S, C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res, -M, C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\AndroidManifest.xml]
at brut.androlib.res.AndrolibResources.aaptPackage(AndrolibResources.jav
a:357)
at brut.androlib.Androlib.buildResourcesFull(Androlib.java:336)
... 5 more
Caused by: brut.common.BrutException: could not exec command: [aapt, p, --min-sdk-version, 8, --target-sdk-version, 19, -F, C:\Users\imp4ler\AppData\Local\Temp\APKTOOL5296650842728907002.tmp, -0, arsc, -I, C:\Users\imp4ler\apktool\framework\1.apk, -S, C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\res, -M, C:\Programs\Apk OneClick\SwiftKey\com.touchtype.swiftkey 5.0.0.72+-disasm\AndroidManifest.xml]
at brut.util.OS.exec(OS.java:89)
at brut.androlib.res.AndrolibResources.aaptPackage(AndrolibResources.jav
a:355)
... 6 more

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I tried to update the components, to no avail. Does anyone have any idea? Another tool, maybe?