Updated JNI use

Author: colemancda

Sources/TextView.swift

@@ -108,13 +108,16 @@ open class AndroidTextView: AndroidView {
 
 // MARK: - Private
 
-fileprivate extension Android.Widget.TextView {
+internal extension Android.Widget.TextView {
 
     /// JNI Cache
     struct JNICache {
 
+        /// JNI Java class signature
+        static let classSignature = Android.Widget.className(["TextView"])
+        
         /// JNI Java class name
-        static let className = "android/widget/TextView"
+        static let className = classSignature.rawValue
 
         /// JNI Java class
         static var jniClass: jclass?

Sources/View.swift

@@ -8,6 +8,7 @@
 import Foundation
 import java_swift
 import java_lang
+import JNI
 
 public extension Android.View {
 
@@ -169,15 +170,18 @@ open class AndroidView: JavaObject {
     }
 }
 
-// MARK: - Private
+// MARK: - JNICache
 
-fileprivate extension Android.View.View {
+internal extension Android.View.View {
 
     /// JNI Cache
     struct JNICache {
 
+        /// JNI Java class signature
+        static let classSignature = Android.View.className(["View"])
+        
         /// JNI Java class name
-        static let className = "android/view/View"
+        static let className = classSignature.rawValue
 
         /// JNI Java class
         static var jniClass: jclass?

Sources/ViewGroup.swift

@@ -18,3 +18,27 @@ open class AndroidViewGroup: Android.View.View {
 
 
 }
+
+// MARK: - JNICache
+
+internal extension Android.View.ViewGroup {
+    
+    /// JNI Cache
+    struct ViewGroupJNICache {
+        
+        /// JNI Java class signature
+        static let classSignature = Android.View.className(["ViewGroup"])
+        
+        /// JNI Java class name
+        static let className = classSignature.rawValue
+        
+        /// JNI Java class
+        static var jniClass: jclass?
+        
+        /// JNI Method ID cache
+        struct MethodID {
+            
+            static var findViewById: jmethodID?
+        }
+    }
+}