导航抽屉在关闭时抽动

Question

我尝试在我的应用中实现导航抽屉（Material 设计）。我的 activity 包含带片段的 FrameLayout。当 Navigation Drawer FrameLayout 中的用户 select 项重新加载新片段时：

    listViewDrawer.setOnItemClickListener( new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick( AdapterView<?> parent, View view, int position, long id) {

            drawerLayout.closeDrawer( listViewDrawer); // <<<-------

            toolbar.setTitle( getResources().getString( R.string.title));

            fragmentMain = new FragmentMain();

            android.app.FragmentManager fragmentManager = getFragmentManager();
            fragmentManager.beginTransaction()
                       .replace( R.id.frameLayoutMain, ApplicationTapaKiosk.getInstance().fragmentMain)
                       .commit();

        }
     }

当我点击项目时一切正常。 Navigation Drawer 关闭不顺利，但冻结（抽搐、抽搐），因为片段在后台重新加载。

如何顺利关闭Navigation Drawer？

Answer 1

抽屉关闭大约需要 200 毫秒。所以你可以这样做：

Handler mHandler = new Handler();

drawerLayout.closeDrawer( listViewDrawer);
mHandler.postDelayed(
                new Runnable() {
                    @Override
                    public void run () {
                        loadFragment();
                    }
                }
                , NAVDRAWER_CLOSE_DELAY // 250...for delay
        );

Answer 2

你要决定你是否更喜欢：

正在替换 FrameLayout 中的 Fragment 然后关闭 DrawerLayout

或

关闭 DrawerLayout 然后替换你的 Fragment.

实施第一种方法：

只需在您的代码中进行这些更改：

listViewDrawer.setOnItemClickListener(new AdapterView.OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        toolbar.setTitle(getResources().getString(R.string.title));

        fragmentMain = new FragmentMain();

        android.app.FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                   .replace(R.id.frameLayoutMain, ApplicationTapaKiosk.getInstance().fragmentMain)
                   .commit();

        fragmentManager.executePendingTransactions(); // wait for the transaction to finish
        drawerLayout.closeDrawer(listViewDrawer); // call closeDrawer(...) as a last thing
    }
 }

实施第二种方法：

在用户点击时设置某种标志：

listViewDrawer.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        mDrawerItemClicked = true;
        drawerLayout.closeDrawer(listViewDrawer); 
    }
 }

并在您的 DrawerLayout 上设置 DrawerLayout.DrawerListener，如下所示：

drawerLayout.setDrawerListener(new DrawerLayout.DrawerListener() {
    @Override
    public void onDrawerSlide(View drawerView, float slideOffset) {
    }

    @Override
    public void onDrawerOpened(View drawerView) {
    }

    @Override
    public void onDrawerClosed(View drawerView) {
        if (mDrawerItemClicked){
            mDrawerItemClicked = false;

            toolbar.setTitle(getResources().getString(R.string.title));
            fragmentMain = new FragmentMain();
            android.app.FragmentManager fragmentManager = getFragmentManager();
            fragmentManager.beginTransaction()
                   .replace(R.id.frameLayoutMain, ApplicationTapaKiosk.getInstance().fragmentMain)
                   .commit();
        }
    }

    @Override
    public void onDrawerStateChanged(int newState) {
    }
});

导航抽屉在关闭时抽动

Navigation Drawer twitches on close

java

android

android-fragments

navigation-drawer

实施第一种方法：

实施第二种方法：