我已经使用 sencha 触摸历史和路由在我的应用程序中实现了后退按钮支持。但它只有在应用程序通过浏览器运行时才有效。当我将应用程序打包为本机应用程序时，按下后退按钮只会关闭应用程序。如何处理原生 android 打包应用程序中的设备后退按钮？除了 sencha 触摸路由和历史支持之外，我还需要任何其他实现，以便后退按钮在通过浏览器以及打包的 android 应用程序运行时工作相同？
我的控制器：
Ext.define('oscommercecatalog.controller.Category', {
extend: 'Ext.app.Controller',
config: {
refs: {
main: 'main'
},
before: {
showRootCategory: 'ensureStoreLoad',
showCategoryById: 'ensureStoreLoad'
},
control: {
main: {
beforepop: 'onMainBeforePop'
},
categories: {
itemtap: 'onCategoryTap'
},
productslist: {
itemtap: 'onProductTap'
}
},
routes: {
'': 'showRootCategory',
':id': 'showCategoryById'
},
currentRecord: null,
stack: []
},
init: function() {
Ext.getStore('Categories').on('load', this.onStoreLoad, this);
},
ensureStoreLoad: function(action) {
var store = Ext.getStore('Categories');
if (store.data.all.length) {
action.resume();
} else {
store.on('load', function() {
action.resume();
}, this, {
single: true
});
}
},
onMainBeforePop: function() {
var history = this.getApplication().getHistory(),
record = this.getCurrentRecord().parentNode,
urlId = (record && record.get('urlId')) ? record.get('urlId') : '',
productView = this.productView,
stack = this.getStack();
this.setCurrentRecord(record);
history.add(new Ext.app.Action({
url: urlId
}), true);
stack.pop();
this.setStack(stack);
if (productView && !productView.isHidden()) {
productView.hide();
}
},
showRootCategory: function() {
var stack = this.getStack();
if (stack.length) {
this.getMain().pop();
return;
}
this.setStack([]);
var store = Ext.getStore('Categories'),
record = store.getRoot();
this.addPreviousViews(record);
this.showCategory(record);
},
onCategoryTap: function(view, index, target, record, e) {
console.log('Category');
this.redirectTo(record);
},
showCategoryById: function(id) {
var store = Ext.getStore('Categories'),
stack = this.getStack(),
previousStackItem = stack[stack.length - 2],
records, record;
if (previousStackItem && previousStackItem == id) {
this.getMain().pop();
return;
}
records = Ext.Array.filter(store.data.all, function(record) {
if (record.get('urlId') == id) {
return record;
}
}, this);
record = records[0];
if (record) {
this.addPreviousViews(record);
stack.push(id);
this.setStack(stack);
if (record.childNodes.length) {
this.showCategory(record);
} else {
this.showProducts(record);
}
} else {
Ext.Logger.warn('Category not found');
}
},
addPreviousViews: function(record) {
var parents = [],
main = this.getMain(),
layout = main.getLayout(),
animation = layout.getAnimation(),
stack = this.getStack(),
ln, i, urlId;
if (main.getInnerItems().length) {
return;
}
while ((record = record.parentNode)) {
parents.unshift(record);
}
layout.setAnimation(false);
ln = parents.length;
for (i = 0; i < ln; i++) {
urlId = parents[i].get('urlId');
if (urlId) {
stack.push(urlId);
}
this.showCategory(parents[i]);
}
this.setStack(stack);
setTimeout(function() {
layout.setAnimation(animation);
}, 50);
},
showCategory: function(record) {
var isRoot = (record.get('id') == "root"),
view;
if (isRoot) {
record.set('label', 'Categories');
}
this.setCurrentRecord(record);
view = this.getCategoriesView({
title: record.get('label'),
cls: (isRoot) ? 'root' : null,
data: record.childNodes
});
this.getMain().setActiveItem(view);
},
showProducts: function(record) {
this.setCurrentRecord(record);
var store = record.products();
store.getProxy().setExtraParam('cat', record.get('urlId'));
store.load();
//empty the store before adding the new one
var productsStore = this.productsView.getStore();
if (productsStore) {
productsStore.removeAll();
}
this.productsView.setStore(store);
this.getMain().setActiveItem(this.productsView);
},
/**
* Called when an item is tapped on.
* This is overridden in the Tablet controller
*/
onProductTap: function(view, record) {
var productView = this.getProductView();
productView.setData(record.data);
if (!productView.getParent()) {
Ext.Viewport.add(productView);
}
productView.show();
},
/**
* This creates and returns a new categories view, for when it is needed.
* Ideally this should be improved at some point to only instansiate a max of 2 views
* and then reuse the same views over again.
* @param {Object} config The configuration for the view.
* @return {Catalog.view.Categories} view
*/
getCategoriesView: function(config) {
return Ext.create('oscommercecatalog.view.Categories', config);
},
/**
* This function is used to create and return a product view.
* There is a different products view for both phone and tablet profiles, so we just have an emptyFn
* in this base controller, and in the tablet/phone controller we will override this.
* @param {Object} config The configuration for the view.
* @return {Ext.Component} view
*/
getProductsView: Ext.emptyFn,
/**
* This function is used to create and return a the product view.
* There is a different product view for both phone and tablet profiles, so we just have an emptyFn
* in this base controller, and in the tablet/phone controller we will override this.
* @param {Object} config The configuration for the view.
* @return {Ext.Component} view
*/
getProductView: Ext.emptyFn
});