项目在开发的时候 有单点登录的功能要做
项目中有 支付宝 微信充值 主要是 支付宝充值 如手机中没有支付宝应用 就在应用内打开h5的支付宝充值页面 这就涉及到 第三方sdk 中的activity关闭问题

注册 ActivityLifecycleCallbacks 监听应用内所有 Activity的生命周期

public class GApplication extends Application {
    //记录当前栈里所有activity
    private List<Activity> activities = new ArrayList<Activity>();
    //记录需要一次性关闭的页面
    private List<Activity> activitys = new ArrayList<Activity>();

    private static GApplication instance;

    DataBaseHelper dbHelper;
    private SharedPreferencesUtil sharedPreferencesUtil;
    //声明AMapLocationClient类对象
    public ApiLogin apiLoginUserInfo;
    public boolean openLogin = false;
    public boolean pushIsForce = false;
    public boolean isEditOrder = false;

    @Override
    protected void attachBaseContext(Context base) {
        super.attachBaseContext(base);
        MultiDex.install(this);
    }

    /**
     * 获得实例
     *
     * @return
     */
    public static GApplication getInstance() {
        return instance;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        FontUtils.getInstance().replaceSystemDefaultFontFromAsset(this, "fonts/robotoregular.ttf");
        registerActivityLifecycleCallbacks(new MyActivityLifecycleCallbacks());
        instance = this;
        //禁止默认的页面统计方式
        MobclickAgent.openActivityDurationTrack(false);
        //debug模式
        MobclickAgent.setScenarioType(getApplicationContext(), MobclickAgent.EScenarioType.E_UM_NORMAL);
        CrashReport.initCrashReport(getApplicationContext(), "73b6bbb172", true);
        sharedPreferencesUtil = SharedPreferencesUtil.getInstance(this);
        sanxinBug();
        initUser();
    }

    public SharedPreferencesUtil getSharedPreferencesUtil() {
        return sharedPreferencesUtil;
    }

    public DataBaseHelper getDbHelper() {
        return dbHelper;
    }

    public void initUser() {
        apiLoginUserInfo = new ApiLogin();
        if (apiLoginUserInfo == null) {
            ApiLogin apiLogin = JacksonUtil.getInstance().readValue(sharedPreferencesUtil.getGsonUserInfo(), ApiLogin.class);
            if (apiLogin != null)
                apiLoginUserInfo = apiLogin;
        }
    }

    //三星键盘系统bug
    public void sanxinBug() {
        try {
            Class cls = Class.forName("android.sec.clipboard.ClipboardUIManager");
            Method m = cls.getDeclaredMethod("getInstance", Context.class);
            m.setAccessible(true);
            m.invoke(null, this);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    }

    /**
     * 新建了一个activity
     *
     * @param activity
     */
    public void addActivity(Activity activity) {
        activities.add(activity);
    }

    /**
     * 结束指定的Activity
     *
     * @param activity
     */
    public void finishActivity(Activity activity) {
        if (activity != null) {
            this.activities.remove(activity);
            activity.finish();
            activity = null;
        }
    }
 /**
     * 应用退出，结束除了main所有的activity
     */
    public void exitNoMain() {
        for (Activity activity : activities) {
            if (activity != null) {
                if (activity instanceof MainActivity) {

                } else {
                    activity.finish();
                }
            }
        }
    }

    /**
     * 应用退出，结束所有的activity
     */
    public void exit() {
        for (Activity activity : activities) {
            if (activity != null) {
                    activity.finish();
            }
        }
    }
private class MyActivityLifecycleCallbacks implements ActivityLifecycleCallbacks {

@Override

public void onActivityCreated(Activity activity, Bundle savedInstanceState) {

GApplication.getInstance().addActivity(activity);

}

@Override

public void onActivityStarted(Activity activity) {

}

@Override

public void onActivityResumed(Activity activity) {

}

@Override

public void onActivityPaused(Activity activity) {

}

@Override

public void onActivityStopped(Activity activity) {

}

@Override

public void onActivitySaveInstanceState(Activity activity, Bundle outState) {

}

@Override

public void onActivityDestroyed(Activity activity) {

GApplication.getInstance().finishActivity(activity);

}

}
}