Increase minimum sdk version

README.md

@@ -4,6 +4,8 @@ Adds additional functionality to the Lithium EPUB Reader Android app.
 
 ## Features
 
+- Requires Android Oreo (8) or higher.
+- Latest WebView (at least ~73) required for full functionality.
 - Custom icon color.
 - Monochrome adaptive icon support.
 - Dynamic grid view cover width and custom aspect ratio.

main.go

@@ -220,7 +220,7 @@ func run(ctx context.Context) error {
 	fmt.Printf("> Signing APK %q to %q\n", apkPatched, *Output)
 	if err := jar(ctx,
 		*Apksigner, "sign",
-		"--min-sdk-version", "23",
+		"--min-sdk-version", "26",
 		"--ks", *Keystore,
 		"--ks-pass", "pass:"+*KeystorePassphrase,
 		"--pass-encoding", "utf-8",

patches/internal/minsdk.go

@@ -0,0 +1,19 @@
+// # Increase minimum API level
+//
+// Set the minimum API level to 26 (8: Oreo). Ships with webview 58 (but
+// upgradeable -- note that we want ~73+ for some of our patches). Ships with
+// SQLite 3.18. Supports APK signatures v2.
+package internal
+
+import . "github.com/pgaskin/lithiumpatch/patches/patchdef"
+
+func init() {
+	Register("minsdk",
+		PatchFile("apktool.yml",
+			ReplaceString(
+				`minSdkVersion: '16'`,
+				`minSdkVersion: '26'`,
+			),
+		),
+	)
+}