refactor source tree organization, switch to meson

src/api-impl/android/text/TextUtils.java

@@ -0,0 +1,64 @@
+package android.text;
+
+import java.util.regex.Pattern;
+
+public class TextUtils {
+	// unchanged from android source
+
+	/* split */
+
+	private static String[] EMPTY_STRING_ARRAY = new String[]{};
+
+    public static String[] split(String text, String expression) {
+        if (text.length() == 0) {
+            return EMPTY_STRING_ARRAY;
+        } else {
+            return text.split(expression, -1);
+        }
+    }
+
+    public static String[] split(String text, Pattern pattern) {
+        if (text.length() == 0) {
+            return EMPTY_STRING_ARRAY;
+        } else {
+            return pattern.split(text, -1);
+        }
+    }
+
+	/* join */
+
+
+    public static String join(CharSequence delimiter, Object[] tokens) {
+        StringBuilder sb = new StringBuilder();
+        boolean firstTime = true;
+        for (Object token: tokens) {
+            if (firstTime) {
+                firstTime = false;
+            } else {
+                sb.append(delimiter);
+            }
+            sb.append(token);
+        }
+        return sb.toString();
+    }
+
+    public static String join(CharSequence delimiter, Iterable tokens) {
+        StringBuilder sb = new StringBuilder();
+        boolean firstTime = true;
+        for (Object token: tokens) {
+            if (firstTime) {
+                firstTime = false;
+            } else {
+                sb.append(delimiter);
+            }
+            sb.append(token);
+        }
+        return sb.toString();
+    }
+	// end of unchanged from android source
+
+    public static CharSequence join(Iterable<CharSequence> list) {
+        final CharSequence delimiter = ","; // ????
+        return join(delimiter, list);
+    }
+}