Android之Activity框架

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);
} }
});