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1. 请支持原创,转载请注明出处:https://blog.csdn.net/cbk861110/article/details/86665564
2. 项目源码请移步:https://github.com/caobaokang419/WeatherApp(欢迎Github Fork&Star,框架和技术实现不妥之处,请帮忙指正),谢谢!
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基于MVVM框架的高德天气APP:
MVVM框架和组件实现:
- ViewModels: 一种可以被观察的以及可以感知生命周期的数据容器。
一、 技术背景:
1. ViewModels 为Android推荐使用的数据存储&管理类;
2. ViewModel类被设计成以一种有意识的生命周期方式存储和管理ui相关的数据,ViewModel类允许数据在配置更改(如屏幕旋转)中存活。
3. 数据&数据的管理从UI中剥离独立出来,简化UI(Activity&fragment等)的代码复杂度,便于后续代码维护;
二、 实现方式(以天气主页为例):
1. 天气主页对应的ViewModel 实现方式(存储&管理主页UI相关的数据,及数据对应的操作处理):
public class MainActivityViewModel extends AndroidViewModel {
private final String[] mCityNames =
new String[]{"深圳", "西安", "合肥", "武汉"};
private final String[] mCityAdcode =
new String[]{"440300", "610100", "340100", "420100"};
private final Map<CityBean, CityWeatherRecyclerAdapter> mAdapterDatas = new HashMap<>();
private MutableLiveData<CityBean> mCurCityBean = new MutableLiveData<>();
private MutableLiveData<List<CityBean>> mCityBeans = new MutableLiveData<>();
private Map<CityBean, List<BaseItemBean>> mCityWeatherDatas = new HashMap<>();
public MainActivityViewModel(@NonNull Application application) {
super(application);
List<CityBean> data = new ArrayList<>();
for (int i = 0; i < mCityNames.length; i++) {
CityBean cityBean = new CityBean(mCityNames[i], mCityAdcode[i]);
data.add(cityBean);
mAdapterDatas.put(cityBean, new CityWeatherRecyclerAdapter());
}
mCityBeans.setValue(data);
}
public void loadCurCityInfo(CityBean cityBean) {
mCurCityBean.setValue(cityBean);
}
public MutableLiveData<CityBean> getCurCityInfo() {
return mCurCityBean;
}
public List<CityBean> getCityInfoList() {
return mCityBeans.getValue();
}
}
2. 天气主页 与对应的ViewModel关联实现(WtMainActivity.java中实现):
public class WtMainActivity extends BaseActivity {
private MainActivityViewModel mViewModel;
private ActionBar mActionBar;
private ViewPager mViewPager;
private CityPagerAdapter mCityPagerAdapter;
private PageIndicatorView mPageIndicatorView;
@Override
protected void onCreateNew(Bundle savedInstanceState) {
//super.onCreate(savedInstanceState);
setContentView(R.layout.activity_weather_main);
initView();
}
private void initView(){
mViewModel = ViewModelProviders.of(this).get(MainActivityViewModel.class); //关联方法
mViewPager = (ViewPager) findViewById(R.id.viewpager);
mCityPagerAdapter = new CityPagerAdapter(this, mViewModel);
mViewPager.setAdapter(mCityPagerAdapter);
mViewModel.registerPageChangeListener(mViewPager);
mPageIndicatorView = findViewById(R.id.page_indicatior);
mPageIndicatorView.registerPageChangeListener(mViewPager);
}
@Override
protected void onResume() {
if (mViewModel != null) {
mViewModel.loadCurCityInfo(new CityBean("深圳", "440300"));
}
super.onResume();
}
}
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文章目录(未完,待续):
一:android 应用子功能及移动框架总述 https://blog.csdn.net/cbk861110/article/details/86665564
二:android 高德天气API说明及城市天气查询实现 https://blog.csdn.net/cbk861110/article/details/86665655
三:android 自定义控件实现(ActionBar + PageIndicatorView) https://blog.csdn.net/cbk861110/article/details/86665790
四:android ViewPager实现左右页面滑动切换 https://blog.csdn.net/cbk861110/article/details/86665964
五:android应用权限动态申请 https://blog.csdn.net/cbk861110/article/details/86666321
六:android RecyclerView 封装及使用 https://blog.csdn.net/cbk861110/article/details/86666392
七:android Xutils3文件下载实现(高德天气城市配置) https://blog.csdn.net/cbk861110/article/details/86666573
八:android DiskLruCache 磁盘缓存 封装和使用 https://blog.csdn.net/cbk861110/article/details/86666664
九:android ThreadPoolExecutor线程池 封装及使用 https://blog.csdn.net/cbk861110/article/details/86667101
十:android 天气网络请求框架(retrofit2&okhttp3&Gson) 封装及使用 https://blog.csdn.net/cbk861110/article/details/86667375
十一:android RxAndroid(响应式编程) 异步网络请求实现 https://blog.csdn.net/cbk861110/article/details/86669178
十二:android DataBinding 数据和UI双向绑定实现 https://blog.csdn.net/cbk861110/article/details/86669708
十三:android room数据库 天气数据读写实现 https://blog.csdn.net/cbk861110/article/details/86670354
十四:android LiveData 使用方法(实现城市天气自动刷新) https://blog.csdn.net/cbk861110/article/details/86670531
十五:android ViewModel 使用方法 https://blog.csdn.net/cbk861110/article/details/86670703
十六:android 集成友盟消息推送机制(U-Push) https://blog.csdn.net/cbk861110/article/details/86683849
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【版权说明】
1. 请支持原创,转载请注明出处:https://blog.csdn.net/cbk861110/article/details/86665564
2. 项目源码请移步:https://github.com/caobaokang419/WeatherApp(欢迎Github Fork&Star,框架和技术实现不妥之处,请帮忙指正),谢谢!