如何创建流畅的导航抽屉 [英] how to create smooth navigation drawer

问题描述

我正在将此示例用于导航抽屉.单击左侧抽屉列表视图中的项目时，它会显示一些图像，但抽屉布局无法顺利关闭.

I am using this example for navigation drawer. When clicking on of item of left drawer listview it shows some images but drawerLayout closes not smoothly.

在单击列表视图的项目后，如何平稳关闭左侧抽屉布局，我该怎么做.

What should I do here for smoothly close left drawer layout after clicking of the item of listview.

推荐答案

不确定这是最佳途径，但是我解决此问题的方法是创建一个在onDrawerClosed中运行的未决Runnable.例如:

Not sure this is the best route, but the way I solved this was to create a pending Runnable that runs in onDrawerClosed. Eg:

private void selectItem(final int position) {
    mPendingRunnable = new Runnable() {
        @Override
        public void run() {
            // update the main content by replacing fragments
            Fragment fragment = new PlanetFragment();
            Bundle args = new Bundle();
            args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
            fragment.setArguments(args); 

            FragmentManager fragmentManager = getFragmentManager();
            fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
        }
    });

    // update selected item and title, then close the drawer
    mDrawerList.setItemChecked(position, true);
    setTitle(mPlanetTitles[position]);
    mDrawerLayout.closeDrawer(mDrawerList);
}

@Override
public void onDrawerClosed(View view) {
    getActionBar().setTitle(mTitle);
    invalidateOptionsMenu();

    // If mPendingRunnable is not null, then add to the message queue 
    if (mPendingRunnable != null) {
        mHandler.post(mPendingRunnable);
        mPendingRunnable = null;
    }
}

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