Android以编程方式更改导航抽屉面板的宽度

Question

我在 Android Studio 中使用了 Navigation Drawer 模板。 在我的活动布局中，我有以下代码：

<fragment android:id="@+id/navigation_drawer"
    android:layout_width="@dimen/navigation_drawer_width"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:name="com.smedilepaolo.newsfeed.NavigationDrawer.NavigationDrawerFragment"
    tools:layout="@layout/fragment_navigation_drawer" />

我需要以编程方式更改面板的宽度。 我认为改变它的正确区域是这样的：

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_news_feed);

        mNavigationDrawerFragment = (NavigationDrawerFragment)
                getFragmentManager().findFragmentById(R.id.navigation_drawer);
        mTitle = getTitle();

....

但我不明白如何才能实现我的目标。

/* 更新 */

抽屉面板的图标不显示在操作栏中

    mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);

            mDrawerListView.post(new Runnable() {
                @Override
                public void run() {
                    Resources resources = getResources();
                    float width = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 240, resources.getDisplayMetrics());
                    DrawerLayout.LayoutParams params = (DrawerLayout.LayoutParams) mDrawerListView.getLayoutParams();
                    params.width = (int) (width);
                    mDrawerListView.setLayoutParams(params);

                }
            });

            selectItem(position);
        }
    });



    mDrawerListView.post(new Runnable() {
        @Override
        public void run() {
            Resources resources = getResources();
            float width = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, resources.getDisplayMetrics().widthPixels-1, resources.getDisplayMetrics());
            DrawerLayout.LayoutParams params = (DrawerLayout.LayoutParams) mDrawerListView.getLayoutParams();
            params.width = (int) (width);
            mDrawerListView.setLayoutParams(params);
            mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
            mDrawerLayout.openDrawer(mFragmentContainerView);
        }
    });

这就是 selectItem 方法

    private void selectItem(int position) {
        mCurrentSelectedPosition = position;
        if (mDrawerListView != null) {
            mDrawerListView.setItemChecked(position, true);
        }
        if (mDrawerLayout != null) {
            mDrawerLayout.closeDrawer(mFragmentContainerView);
        }

....

Answer 1

基于从 Navigation Drawer 模板生成的代码，您可以通过将此代码添加到 NavigationDrawerFragment 中的 onCreateView() 方法来更改面板的宽度。

 mDrawerListView.post(new Runnable() {
        @Override
        public void run() {
            Resources resources = getResources();
            float width = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, resources.getDisplayMetrics());
            DrawerLayout.LayoutParams params = (DrawerLayout.LayoutParams) mDrawerListView.getLayoutParams();
            params.width = (int) (width);
            mDrawerListView.setLayoutParams(params);
        }
    });

禁用 DrawerLayout 上的平移手势：

//NavigationDrawerFragment

public void setUp(int fragmentId, DrawerLayout drawerLayout) {
    mDrawerLayout = drawerLayout;
    mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
}

打开/关闭 DrawerLayout：

mDrawerLayout.openDrawer(mDrawerListView);
mDrawerLayout.closeDrawer(mDrawerListView);

为防止抽屉面板图标消失，修改setOnItemClickListener方法如下：

mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            selectItem(position);
        }
});

并修改覆盖的 onDrawerClose 方法如下：

@Override
public void onDrawerClosed(View drawerView) {
    super.onDrawerClosed(drawerView);
    if (!isAdded()) {
        return;
    }

    mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);

    Resources resources = getResources();
    float width = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 240, resources.getDisplayMetrics());
    DrawerLayout.LayoutParams params = (DrawerLayout.LayoutParams) mDrawerListView.getLayoutParams();
    params.width = (int) (width);
    mDrawerListView.setLayoutParams(params);

    getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}