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onContextItemSelected 、 onMenuItemSelected

2018年05月16日 ⁄ 综合 ⁄ 共 1708字 ⁄ 字号 评论关闭

项目中遇到onContextItemSelected不会被调用的问题。

先看android本身的源码 :

 /**
     * Default implementation of
     * {@link android.view.Window.Callback#onMenuItemSelected}
     * for activities.  This calls through to the new
     * {@link #onOptionsItemSelected} method for the
     * {@link android.view.Window#FEATURE_OPTIONS_PANEL}
     * panel, so that subclasses of
     * Activity don't need to deal with feature codes.
     */
    public boolean onMenuItemSelected(int featureId, MenuItem item) {
        switch (featureId) {
            case Window.FEATURE_OPTIONS_PANEL:
                // Put event logging here so it gets called even if subclass
                // doesn't call through to superclass's implmeentation of each
                // of these methods below
                EventLog.writeEvent(50000, 0, item.getTitleCondensed());
                if (onOptionsItemSelected(item)) {
                    return true;
                }
                if (mFragments.dispatchOptionsItemSelected(item)) {
                    return true;
                }
                if (item.getItemId() == android.R.id.home && mActionBar != null &&
                        (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) {
                    if (mParent == null) {
                        return onNavigateUp();
                    } else {
                        return mParent.onNavigateUpFromChild(this);
                    }
                }
                return false;
                
            case Window.FEATURE_CONTEXT_MENU:
                EventLog.writeEvent(50000, 1, item.getTitleCondensed());
                if (onContextItemSelected(item)) {
                    return true;
                }
                return mFragments.dispatchContextItemSelected(item);

            default:
                return false;
        }
    }

tips:在2.2上菜单是在下面显示的,在4.0之后它就到上面了,但是sherlockBar把两者统一,当它是任何版本都显示在上面。


当你点击某个菜单(上下文菜单、actionBar菜单、2.2的下文菜单)都会先调用onMenuItemSelected,然后根据是哪种类型去调用相应的方法
onOptionsItemSelected或者onContextItemSelected。


我出现问题是因为我的onMenuItemSelected方法是继承自sherlock类的,它写的方法有问题,导致不会去调用onContextItemSelected方法。

@Override
    public boolean onMenuItemSelected(int featureId,android.view.MenuItem item) {
        if (featureId == Window.FEATURE_OPTIONS_PANEL) {
            return onOptionsItemSelected(item);
        }else if (featureId == Window.FEATURE_CONTEXT_MENU) {
        	return onContextItemSelected(item);
		}
        return false;
    }

这是已修复好的~~~



所以,理清安卓菜单事件的响应顺序~~~

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