android2.2的LocalActivityManager的destroyActivity()问题

      今天在用ActivityGroup做例子，发现了个问题，并采用了个笨办法暂时解决。

      首先看LocalActivityManager的destroyActivity()的源码：

     

/**     * Destroy the activity associated with a particular id.  This activity     * will go through the normal lifecycle events and fine onDestroy(), and     * then the id removed from the group.     *      * @param id Unique identifier of the activity to be destroyed     * @param finish If true, this activity will be finished, so its id and     * all state are removed from the group.     *      * @return Returns the window that was used to display the activity, or     * null if there was none.     */    public Window destroyActivity(String id, boolean finish) {        LocalActivityRecord r = mActivities.get(id);        Window win = null;        if (r != null) {            win = performDestroy(r, finish);            if (finish) {                mActivities.remove(r);            }        }        return win;    }

        大家可能已经发现remove的时候，错误，应该是remove(id)。不知道google的错误，还是故意这么做，不让删除。

        这样以来在调用destroyActivity就没法删除，这样在做ActivityGroup的返回就会出错误。

        具体ActivityGroup中Activity的返回代码如下:

       

@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {if(keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP){onBackPressed();}return super.onKeyDown(keyCode, event);}public void onBackPressed() {if(index>1){activityManager.destroyActivity((index)+"", true);boolean isWhile = true;while(isWhile){Activity activity = activityManager.getActivity((--index)+"");if(activity!=null){startActivityBack(activity);isWhile = false;break;}}}else{super.onBackPressed();}}

        一下是在ActivityGroup中start和back调用的方法：

       

private int index = 0;public void startActivityForGroup(Intent intent) {boolean isWhile = true;while (isWhile) {Window window = activityManager.startActivity((++index)+"", intent);Log.d(TAG, "==window:"+window);Log.d(TAG, "==CurrentId:"+index);if(window!=null){isWhile = false;View decorView =window.getDecorView();contentView.removeAllViews();contentView.addView(decorView);break;}}}public void startActivityBack(Activity activity){if(activity.getWindow()==null)return;System.out.println("==view:"+activity.getWindow().getDecorView());contentView.removeAllViews();contentView.addView(activity.getWindow().getDecorView());}

          这样，暂时能够保持正常返回。但是存在隐患。希望大家能够交互方法，让我们的代码更加完善。