Create files required for aapt on-device

Allows to add more values dynamically.
xmlstarlet is removed, reducing app size.

Author: Akilesh-T

app/src/main/assets/AndroidManifest.xml

@@ -0,0 +1,92 @@
+package app.akilesh.qacc.utils
+
+import app.akilesh.qacc.BuildConfig
+import org.w3c.dom.Document
+import org.w3c.dom.Element
+import java.io.File
+import javax.xml.parsers.DocumentBuilder
+import javax.xml.parsers.DocumentBuilderFactory
+import javax.xml.parsers.ParserConfigurationException
+import javax.xml.transform.OutputKeys
+import javax.xml.transform.TransformerFactory
+import javax.xml.transform.dom.DOMSource
+import javax.xml.transform.stream.StreamResult
+
+object XmlUtils {
+
+    private val transformerFactory: TransformerFactory by lazy { TransformerFactory.newInstance() }
+
+    private val documentBuilder: DocumentBuilder by lazy {
+        try {
+            DocumentBuilderFactory.newInstance().newDocumentBuilder()
+        } catch (exception: ParserConfigurationException) {
+            throw IllegalStateException("Unable to initiate")
+        }
+    }
+
+    fun createOverlayManifest(file: File, pkgName: String, accentName: String) {
+        val document = documentBuilder.newDocument()
+
+        val rootElement = document.createElement("manifest")
+        rootElement.setAttribute("xmlns:android",
+            "http://schemas.android.com/apk/res/android")
+        rootElement.setAttribute("package", pkgName)
+        rootElement.setAttribute("android:versionName", BuildConfig.VERSION_NAME)
+        rootElement.setAttribute("android:versionCode", BuildConfig.VERSION_CODE.toString())
+
+        val overlayElement = document.createElement("overlay")
+        overlayElement.setAttribute("android:priority", "1")
+        overlayElement.setAttribute("android:targetPackage", "android")
+        overlayElement.setAttribute("android:category", "android.theme.customization.accent_color")
+        rootElement.appendChild(overlayElement)
+
+        val applicationElement = document.createElement("application")
+        applicationElement.setAttribute("android:hasCode", "false")
+        applicationElement.setAttribute("android:allowBackup","false")
+        applicationElement.setAttribute("android:extractNativeLibs","false")
+        applicationElement.setAttribute("android:label", accentName)
+        rootElement.appendChild(applicationElement)
+
+        document.appendChild(rootElement)
+
+        try {
+            val transformer = transformerFactory.newTransformer()
+            transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8")
+            transformer.setOutputProperty(OutputKeys.STANDALONE, "no")
+            transformer.setOutputProperty(OutputKeys.INDENT, "yes")
+            transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4")
+            val source = DOMSource(document)
+            transformer.transform(source, StreamResult(file))
+        }
+        catch (e: Exception) {
+            throw RuntimeException("Cannot build the result", e)
+        }
+    }
+
+    fun createColors(file: File, colorLight: String, colorDark: String) {
+        val document = documentBuilder.newDocument()
+        val resourcesElement = document.createElement("resources")
+        addColor(document, resourcesElement, "accent_device_default_light", colorLight)
+        addColor(document, resourcesElement, "accent_device_default_dark", colorDark)
+        document.appendChild(resourcesElement)
+
+        try {
+            val transformer = transformerFactory.newTransformer()
+            transformer.setOutputProperty(OutputKeys.ENCODING, "utf-8")
+            transformer.setOutputProperty(OutputKeys.INDENT, "yes")
+            transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4")
+            val source = DOMSource(document)
+            transformer.transform(source, StreamResult(file))
+        }
+        catch (e: Exception) {
+            throw RuntimeException("Cannot build the result", e)
+        }
+    }
+
+    private fun addColor(document: Document, resourceElement: Element, name: String, value: String) {
+        val element = document.createElement("color")
+        element.setAttribute("name", name)
+        element.appendChild(document.createTextNode(value))
+        resourceElement.appendChild(element)
+    }
+}