添加一个 android 返回键 demo

AndroidBackEventDemo/settings/builder.json

@@ -0,0 +1,13 @@
+{
+  "excludeScenes": [],
+  "orientation": {
+    "landscapeLeft": true,
+    "landscapeRight": true,
+    "portrait": false,
+    "upsideDown": false
+  },
+  "packageName": "org.cocos2d.helloworld",
+  "startScene": "2d2f792f-a40c-49bb-a189-ed176a246e49",
+  "title": "hello_world",
+  "webOrientation": "auto"
+}

AndroidBackEventDemo/settings/builder.panel.json

@@ -0,0 +1,7 @@
+{
+  "excludeScenes": [],
+  "packageName": "org.cocos2d.helloworld",
+  "platform": "web-mobile",
+  "startScene": "2d2f792f-a40c-49bb-a189-ed176a246e49",
+  "title": "HelloWorld"
+}

AndroidBackEventDemo/settings/project.json

@@ -0,0 +1,28 @@
+{
+  "collision-matrix": [
+    [
+      true
+    ]
+  ],
+  "excluded-modules": [],
+  "group-list": [
+    "default"
+  ],
+  "start-scene": "current",
+  "design-resolution-width": 960,
+  "design-resolution-height": 640,
+  "fit-width": false,
+  "fit-height": true,
+  "use-project-simulator-setting": false,
+  "simulator-orientation": false,
+  "use-customize-simulator": false,
+  "simulator-resolution": {
+    "width": 960,
+    "height": 640
+  },
+  "cocos-analytics": {
+    "enable": false,
+    "appID": "13798",
+    "appSecret": "959b3ac0037d0f3c2fdce94f8421a9b2"
+  }
+}