Android 导航抽屉滞后

每次我打开新活动时，导航抽屉都会滞后。我在谷歌上寻找一个解决方案，我发现我可以通过使用处理程序延迟新活动来解决这个问题。我做了一点实验，但什么也没有得到

MainActivity.java中的一些代码片段：

 public void SelectItem(int possition) {

        Fragment fragment = null;
        Bundle args = new Bundle();
        switch (possition) {

            case 2:
                fragment = new FragmentZero();
                break;
            case 3:
                fragment = new FragmentOne();
                break;
            case 4:
                fragment = new FragmentTwo();
                break;
            case 5:
                fragment = new FragmentThree();
                break;
            case 7:
                fragment = new FragmentTwo();
                break;
            case 8:
                fragment = new FragmentZero();
                break;
            case 9:
                fragment = new FragmentOne();
                break;
            case 10:
                fragment = new FragmentTwo();
                break;
            case 11:
                fragment = new FragmentZero();
                break;
            case 12:
                fragment = new FragmentOne();
                break;
            case 14:
                fragment = new FragmentZero();
                break;
            case 15:
                fragment = new FragmentOne();
                break;
            case 16:
                fragment = new FragmentTwo();
                break;
            default:
                break;
        }

        fragment.setArguments(args);
        FragmentManager frgManager = getFragmentManager();
        frgManager.beginTransaction().replace(R.id.content_frame, fragment)
                .commit();

        mDrawerList.setItemChecked(possition, true);
        setTitle(dataList.get(possition).getItemName());
        mDrawerLayout.closeDrawer(mDrawerList);
    }

及

私有类DrawerItemClickListener实现ListView.OnItemClickListener{
@凌驾
public void onItemClick（AdapterView父视图、视图、整型位置、，
长id）{
if（dataList.get（position.getTitle（）==null）{
选择项目（位置）；
}
}
}

在“活动”中创建一个处理程序，并在“创建”方法中对其进行初始化

private Handler mHandler;
mHandler = new Handler();

然后将您的抽屉项目更改为“单击侦听器”

 private class DrawerItemClickListener implements ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, final int position,
                            long id) {
        if (dataList.get(position).getTitle() == null) {
            mHandler.postDelayed(new Runnable() {
              @Override
              public void run() {
                  SelectItem(position);;
              }
            }, 250);  
        }
        mDrawerList.setItemChecked(possition, true);
        mDrawerLayout.closeDrawer(mDrawerList);
    }
}

---

这不是问题的答案，但您可以像这样捆绑case语句，使代码更加紧凑。看到SwitchDemo2这篇文章，我很感谢你的回答，但正如你所说的，这不是我的问题。这就是为什么我添加它作为一个评论；）我让它工作了，我已经把计时器设置为300，但我仍然不喜欢它的工作方式。当我按下抽屉面板上的按钮时，它滑动得很慢很好，然后活动就像一个瞬间。你可以设置片段之间的过渡动画，帮助平滑一切。查看此问题了解更多信息。

 private class DrawerItemClickListener implements ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, final int position,
                            long id) {
        if (dataList.get(position).getTitle() == null) {
            mHandler.postDelayed(new Runnable() {
              @Override
              public void run() {
                  SelectItem(position);;
              }
            }, 250);  
        }
        mDrawerList.setItemChecked(possition, true);
        mDrawerLayout.closeDrawer(mDrawerList);
    }
}

 public void SelectItem(int possition) {

    Fragment fragment = null;
    Bundle args = new Bundle();
    switch (possition) {

        case 2:
            fragment = new FragmentZero();
            break;
        case 3:
            fragment = new FragmentOne();
            break;
        case 4:
            fragment = new FragmentTwo();
            break;
        case 5:
            fragment = new FragmentThree();
            break;
        case 7:
            fragment = new FragmentTwo();
            break;
        case 8:
            fragment = new FragmentZero();
            break;
        case 9:
            fragment = new FragmentOne();
            break;
        case 10:
            fragment = new FragmentTwo();
            break;
        case 11:
            fragment = new FragmentZero();
            break;
        case 12:
            fragment = new FragmentOne();
            break;
        case 14:
            fragment = new FragmentZero();
            break;
        case 15:
            fragment = new FragmentOne();
            break;
        case 16:
            fragment = new FragmentTwo();
            break;
        default:
            break;
    }

    fragment.setArguments(args);
    FragmentManager frgManager = getFragmentManager();
    frgManager.beginTransaction().replace(R.id.content_frame, fragment)
            .commit();
    setTitle(dataList.get(possition).getItemName());
}