rename android_back to back_handler

druid/base/back_handler.lua

@@ -0,0 +1,27 @@
+local data = require("druid.data")
+
+local M = {}
+M.interest = {
+	data.ON_INPUT
+}
+
+
+function M.init(self, callback, params)
+	self.event = data.A_ANDR_BACK
+	self.callback = callback
+	self.params = params
+end
+
+
+--- input handler
+-- @param action_id - input action id
+-- @param action - input action
+function M.on_input(self, action_id, action)
+	if action[data.RELEASED] then
+		self.callback(self.parent.parent, self.params)
+	end
+	return true
+end
+
+
+return M