点滴记录 -- 自定义Activity栈之如何出栈

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自定义Activity栈

首先自定义一个 ActivityManage

第一种 ActivityManage

 感谢  http://www.360doc.com/content/14/0916/15/16319846_409925799.shtml       public class ScreenManager {    private static Stack<Activity> activityStack;    private static ScreenManager instance;    private ScreenManager() {    }    public static ScreenManager getScreenManager() {        if (instance == null) {            instance = new ScreenManager();        }        return instance;    }     public static void popActivity() {        Activity activity = activityStack.lastElement();        if (activity != null) {            activity.finish();            activity = null;        }    }    // 退出栈顶Activity    public void popActivity(Activity activity) {        if (activity != null) {            activity.finish();            activityStack.remove(activity);            activity = null;        }    }    // 获得当前栈顶Activity    public Activity currentActivity() {        Activity activity = activityStack.lastElement();        return activity;    }    // 将当前Activity推入栈中    public static void pushActivity(Activity activity) {        if (activityStack == null) {            activityStack = new Stack<Activity>();        }        activityStack.add(activity);    }    // 退出栈中所有Activity    public void popAllActivityExceptOne(Class cls) {        while (true) {            Activity activity = currentActivity();            if (activity == null) {                break;            }            if (activity.getClass().equals(cls)) {                break;            }            popActivity(activity);            }        }    }

第二种 ActivityManage

感谢好友 开发-北京-噢耶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到堆中     */    public void addActivity(Activity activity) {        if (activityStack == null) {            activityStack = new Stack<Activity>();        }        activityStack.add(activity);    }    /**     * 获取当前Activity（堆栈中压入的）     */    public Activity currentActivity() {        Activity activity = activityStack.lastElement();        return activity;    }    /**     * 根据字节码找到对应的Activity实例     *      * @param cls     * @return     */    public Activity getActivity(Class<?> cls) {        for (Activity activity : activityStack) {            if (activity.getClass().equals(cls)) {                return activity;            }        }        return null;    }    /**     * 结束当前Activity（堆栈中�?���?��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);//          }//      }         Iterator<Activity> itr = activityStack.iterator();           while(itr.hasNext()){             Activity activity = itr.next();             if(activity.getClass().equals(cls)){                 itr.remove();                 activity.finish();                 activity = null;             }         }    }    /**     * 结束所有的Activity     */    public void finishAllActivity() {        for (int i = 0, size = activityStack.size(); i < size; i++) {            if (null != activityStack.get(i) && !activityStack.get(i).isFinishing()) {                activityStack.get(i).finish();            }        }        activityStack.clear();        System.exit(0);    }}

第三种 ActivityManage

public class FQYActivityManage {    private static FQYActivityManage manage;    private static Stack<Activity> activityStack;    private FQYActivityManage() {    }    /**     * 得到一个 FQYActivityManage 对象     *      * @return     */    public static FQYActivityManage getFQYActivityManage() {        // 保证只有一个 FQYActivityManage对象        if (manage == null) {            manage = new FQYActivityManage();        }        return manage;    }    /**     * 获得当前栈顶的activity     *      * @return     */    public Activity getCurrentStackTopActivity() {        Activity activity = null;        if (!activityStack.empty()) {            activity = activityStack.lastElement();        }        return activity;    }    /**     * 将新的activity 压栈     *      * @param activity     */    public void pushActivity(Activity activity) {        if (activityStack == null) {            activityStack = new Stack<Activity>();        }        activityStack.add(activity);        FQYLogUtils.e("push入栈 " + activity.toString());    }    /**     * 退出栈顶 activity     */    public void pullActivity() {        Activity lastElement = null;        if (!activityStack.empty()) {            lastElement = activityStack.lastElement();            FQYLogUtils.e("pull出栈 " + lastElement.toString());            lastElement.finish();            activityStack.remove(lastElement);        }    }    /**     * 关闭应用程序     */    public void pullAllActivity() {        int size = activityStack.size();        for (int i = 0; i < size; i++) {            pullActivity();            size--;        }    }}

第三种是我自己写的，这里以第三种为例继续下文，先来段题外话，网上好多第一种，但是我对popAllActivityExceptOne 很困惑，注释写的是“退出栈中所有Activity”，但是方法名（popAllActivityExceptOne）和方法体都是保留一个指定的activity，不明白这样做的目的和用法，求指点

言归正传，继续主题。

重写一个Application

主要是为了方便管理activityManage（我是这么理解的，不对请指正）

public class FQYApplication extends Application {    protected FQYActivityManage activityManage;    @Override    public void onCreate() {        super.onCreate();        activityManage = FQYActivityManage.getFQYActivityManage();    }    public FQYActivityManage getActivityManage() {        return activityManage;    }    public void setActivityManage(FQYActivityManage activityManage) {        this.activityManage = activityManage;    }}

写一个baseActivity 或者直接使用

看看baseactivity

public class BaseActivity extends FragmentActivity {    protected Context baseContext;    protected FQYActivityManage activityManage;    @Override    protected void onCreate(Bundle arg0) {        super.onCreate(arg0);        baseContext = this;        // 去除标题栏        requestWindowFeature(Window.FEATURE_NO_TITLE);        activityManage = ((FQYApplication) this.getApplication())                .getActivityManage();        activityManage.pushActivity(this);    }    @Override    protected void onDestroy() {        super.onDestroy();    }    @Override    public void onBackPressed() {        super.onBackPressed();    }}

Ps：不要在baseactivity 中执行出栈，想知道为什么？你可以试验一下。

接下来就是如何出栈了

出栈在baseactivity 的子类中执行，子类有FQYActivityManage的对象 activityManage（baseactivity 中 protected FQYActivityManage activityManage; ），只须在需要出栈的地方 activityManage.pullActivity(); 就可以了，相信直接使用你也会了吧？

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点滴记录 -- 自定义Activity栈 之 如何出栈