update readme.

README.md

@@ -1,3 +1,27 @@
 Top Material Design Top Toast Bar.
 
 Support in the application or in the window.
+
+Toast style to use:
+
+with container view:
+```java
+    public void onBottomToast(View view) {
+        BottomToast.make((ViewGroup) findViewById(R.id.parent), context, "HELLO WORLD!!!!", 3000).show();
+    }
+
+    public void onTopToast(View view) {
+        TopToast.make((ViewGroup) findViewById(R.id.parent), context, "HELLO WORLD!!!!", 3000).show();
+    }
+```
+
+without container view(attach as overlay)
+```java
+    public void onBottomToast(View view) {
+        BottomToast.make(context, "HELLO WORLD!!!!", 3000).show();
+    }
+
+    public void onTopToast(View view) {
+        TopToast.make(context, "HELLO WORLD!!!!", 3000).show();
+    }
+```