Android之开源中国客户端源码分析(一)
程序启动第一个界面类: net.oschina.app.AppStart
功能描述:一张图片
代码细节描述:一个透明度的动画效果,效果动画完成后自动启动新的Activity(Main)
基本BaseActivity类,继承自Activity
功能描述:分别在onCreate方法中添加Activity到栈 ; 在onDestroy方法中移除Activity
代码细节描述: 提供了一个单例类AppManager,把创建的Activity放入到栈中进行管理,提供添加Activity , 移除当前Activity , 移除指定的Activity , 移除所有的Activity ,获得当前的Activity , 退出程序。 这个工具类非常适合与用作开发使用,具体代码如下:
import java.util.Stack;
import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;
/**
* 应用程序Activity管理类:用于Activity管理和应用程序退出
* @author liux (http://my.oschina.net/liux)
* @version 1.0
* @created 2012-3-21
*/
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
*/
@SuppressWarnings("deprecation")
public void AppExit(Context context) {
try {
finishAllActivity();
ActivityManager activityMgr= (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
activityMgr.restartPackage(context.getPackageName());
System.exit(0);
} catch (Exception e) { }
}
}
仿Activity管理写的Fragment管理
/** * @author lee0000 * @version 1 * @time 10月7日 * */ public class FraManager { private static Stack<Fragment> fragmentStack; private static FraManager instance; private static final Object obj = new Object(); private FraManager() { } /** * 单一实例 */ public static FraManager getFraManager() { if (instance == null) { synchronized (obj) { if (instance == null) { instance = new FraManager(); } } } return instance; } /** * 添加Fragment到堆栈 */ public static void pushFragment(FragmentActivity fact, Fragment fragment, int layoutID, String... title){ if(fragmentStack==null){ fragmentStack=new Stack<Fragment>(); } fragmentStack.push(fragment); FragmentTransaction ft = fact.getSupportFragmentManager().beginTransaction(); ft.replace(layoutID, fragment); if (fragmentStack.size() > 1) { ft.addToBackStack(null); } ft.commit(); } /** * 弹出Fragment */ public static Fragment popFragment(FragmentActivity fact) { Fragment fragment = fragmentStack.pop(); FragmentTransaction ft = fact.getSupportFragmentManager().beginTransaction(); ft.remove(fragment); ft.commit(); return fragment; } /*** * 弹出指定Activity中所有的fragment * */ public static void finishFragment(FragmentActivity fact){ for (int i = 0, size = fragmentStack.size(); i < size; i++){ Fragment stackFragment = fragmentStack.get(i); if (null != stackFragment){ Fragment fragment = stackFragment; if (fact == fragment.getActivity()) { FragmentTransaction ft = fragment.getFragmentManager().beginTransaction(); ft.remove(fragment); fragmentStack.remove(i); ft.commit(); } } } } /** * 清除栈中所有的项 * */ public static void clearStack(){ if (fragmentStack != null && fragmentStack.isEmpty()) { fragmentStack.clear(); } } }