java - Android以编程方式更改抽屉导航面板的宽度

我已经使用了Android Studio中提供的Navigation Drawer模板。
在我的 Activity 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。
我认为更改它的正确区域是:

    @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();

....

但是我不明白如何实现我的目标。

/ *更新* /

抽屉面板的图标未显示在操作栏中

    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);
        }
    });

那就是selectItem方法

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

....

最佳答案

根据从Navigation Drawer模板生成的代码，可以通过将代码添加到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);
        }
    });

要在DrawerLayout上禁用平移手势:

//NavigationDrawerFragment

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

要打开/关闭DrawerLayout:

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

为防止抽屉面板的图标消失，请按如下所示更改setOnItemClickListener方法:

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，如下所示:

@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()
}