Android之Activity框架

痛定思痛。 2022-07-27 15:54 170阅读 0赞

### 在安卓应用中，经常需要Activity中经常需要有大量相似的Activity类，这些类往往有相似的结构与功能，因此产生了大量重复代码，为此，以下提供一种方法有效的降低了代码冗余。 ###

## 定义Activity工具类 ##

*      应用程序Activity管理类：用于Activity管理和应用程序退出
     * 修订历史 ：
     * 
     * ============================================================
     **/
    
    public class AppManager {
        
    
        private static Stack<Activity> activityStack;
        private static AppManager instance;
    
        private AppManager(){}
        /**
         * 单一实例
         */
        public static AppManager getAppManager(){
            if(instance==null){
                instance=new AppManager();
            }
            return instance;
        }
        /**
         * 添加Activity到堆栈
         */
        public void addActivity(Activity activity){
            if(activityStack==null){
                activityStack=new Stack<Activity>();
            }
            activityStack.add(activity);
        }
        /**
         * 获取当前Activity（堆栈中最后一个压入的）
         */
        public Activity currentActivity(){
            Activity activity=activityStack.lastElement();
            return activity;
        }
        /**
         * 结束当前Activity（堆栈中最后一个压入的）
         */
        public void finishActivity(){
            Activity activity=activityStack.lastElement();
            finishActivity(activity);
        }
        /**
         * 结束指定的Activity
         */
        public void finishActivity(Activity activity){
            if(activity!=null){
                activityStack.remove(activity);
                activity.finish();
                activity=null;
            }
        }
        /**
         * 结束指定类名的Activity
         */
        public void finishActivity(Class<?> cls){
            for (Activity activity : activityStack) {
                if(activity.getClass().equals(cls) ){
                    finishActivity(activity);
                }
            }
        }
        /**
         * 结束所有Activity
         */
        public void finishAllActivity(){
            for (int i = 0, size = activityStack.size(); i < size; i++){
                if (null != activityStack.get(i)){
                    activityStack.get(i).finish();
                }
            }
            activityStack.clear();
        }
        /**
         * 退出应用程序
         */
        public void AppExit(Context context) {
            try {
                finishAllActivity();
                ActivityManager activityMgr= (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
                activityMgr.restartPackage(context.getPackageName());
                System.exit(0);
                android.os.Process.killProcess(android.os.Process.myPid());
            } catch (Exception e) { }
        }
    }

## 定义Activity基类 ##

public abstract class BaseActivity extends Activity implements OnClickListener {
        
        /**
         * Android生命周期回调方法-创建
         */
        @Override
        public void onCreate(Bundle paramBundle) {
            super.onCreate(paramBundle);
            // 设置没有标题
            // requestWindowFeature(Window.FEATURE_NO_TITLE);
            mContext = this;
            app = (AmbowApplication) getApplication();
            AppManager.getAppManager().addActivity(this);
            initView();
        }
    
        /**
         * Android生命周期回调方法-销毁
         */
        @Override
        protected void onDestroy() {
            AppManager.getAppManager().finishActivity(this);
            super.onDestroy();
    
        }
    
        @Override
        protected void onResume() {
    
            super.onResume();
            overridePendingTransition(android.R.anim.fade_in,
                    android.R.anim.fade_out);
        }
    
        @Override
        protected void onPause() {
            super.onPause();
        }
        /**
         * 初始化界面
         */
        private void initView() {
            loadViewLayout();
            findViewById();
            processLogic();
            setListener();
        }
    
    /**
         * find控件
         */
        protected abstract void findViewById();
    
        /**
         * 加载布局
         */
        protected abstract void loadViewLayout();
    
        /**
         * 后台获取数据
         */
        protected abstract void processLogic();
    
        /**
         * 设置监听
         */
        protected abstract void setListener();

### 将获取布局，获取View,获取后台数据，设置监听设置为抽象方法，使得子类继承时必须要实现。 ###

## 子类对抽象方法的实现 ##

@Override
        protected void findViewById() {
            newsLv = (ListView) this.findViewById(R.id.news_lv);
            gallery = (MyGallery) galleryView.findViewById(R.id.gallery);
            galleryRl = (RelativeLayout) galleryView.findViewById(R.id.rl_gallery);
            bannerTv = (TextView) galleryView.findViewById(R.id.banner_tv);
            addMoreBtn = (TextView) addMoreView.findViewById(R.id.btn_add_more);
    
        }
    
        @Override
        protected void loadViewLayout() {
            setContentView(R.layout.news_list_layout);
            galleryView = View.inflate(mContext, R.layout.gallery_layout, null);
            addMoreView = View.inflate(mContext, R.layout.add_more, null);
            setTitleBarView(false, "资讯", -1, true);
        }
    
        @Override
        protected void processLogic() {
            newsLv.addHeaderView(galleryView);
            eduNewsList = new ArrayList<NewsListEntity.News>();
            newsLv.addFooterView(addMoreView);
    //      getTopNewsData();
    
        }
    
        @Override
        protected void setListener() {
            addMoreBtn.setOnClickListener(this);
            newsLv.setOnItemClickListener(new OnItemClickListener() {
    
                @Override
                public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                        long arg3) {
                    Intent detailIntent = new Intent(mContext,
                            NewsDetailActivity.class);
                    if (eduNewsList.size() > arg2 - 1) {
                        detailIntent.putExtra("id", eduNewsList.get(arg2 - 1).Id);
                        startActivity(detailIntent);
                    }
    
                }
            });