Android以编程方式更改导航抽屉面板的宽度

基于从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);        }});

并修改重写的onDrawerClose方法，如下所示：

@Overridepublic 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()}