Question

到目前为止，我已经设法在左侧制作了一个应用程序抽屉，但我不知道如何在右侧放置一个，同样由动作栏上的另一个按钮触发。我怎么能这样做？

到目前为止我的代码如下：的 MainActivity

public class MainActivity extends Activity {

    // Within which the entire activity is enclosed
    DrawerLayout mDrawerLayout;

    // ListView represents Navigation Drawer
    ListView mDrawerList;

    // ActionBarDrawerToggle indicates the presence of Navigation Drawer in the action bar
    ActionBarDrawerToggle mDrawerToggle;

    // Title of the action bar
    String mTitle="";

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mTitle = (String) getTitle();

        // Getting reference to the DrawerLayout
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

        mDrawerList = (ListView) findViewById(R.id.drawer_list);

        // Getting reference to the ActionBarDrawerToggle
        mDrawerToggle = new ActionBarDrawerToggle( this,
            mDrawerLayout,
            R.drawable.ic_drawer,
            R.string.drawer_open,
            R.string.drawer_close){

                /** Called when drawer is closed */
                public void onDrawerClosed(View view) {
                    getActionBar().setTitle(mTitle);
                    invalidateOptionsMenu();
                }

                /** Called when a drawer is opened */
                public void onDrawerOpened(View drawerView) {
                    getActionBar().setTitle("Select a river");
                    invalidateOptionsMenu();
                }
        };

        // Setting DrawerToggle on DrawerLayout
        mDrawerLayout.setDrawerListener(mDrawerToggle);

        // Creating an ArrayAdapter to add items to the listview mDrawerList
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(
            getBaseContext(),
            R.layout.drawer_list_item ,
            getResources().getStringArray(R.array.rivers)
        );

        // Setting the adapter on mDrawerList
        mDrawerList.setAdapter(adapter);

        // Enabling Home button
        getActionBar().setHomeButtonEnabled(true);

        // Enabling Up navigation
        getActionBar().setDisplayHomeAsUpEnabled(true);

        // Setting item click listener for the listview mDrawerList
        mDrawerList.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent,
                View view,
                int position,
                long id) {

                    // Getting an array of rivers
                    String[] rivers = getResources().getStringArray(R.array.rivers);

                    //Currently selected river
                    mTitle = rivers[position];

                    // Creating a fragment object
                    RiverFragment rFragment = new RiverFragment();

                    // Creating a Bundle object
                    Bundle data = new Bundle();

                    // Setting the index of the currently selected item of mDrawerList
                    data.putInt("position", position);

                    // Setting the position to the fragment
                    rFragment.setArguments(data);

                    // Getting reference to the FragmentManager
                    FragmentManager fragmentManager = getFragmentManager();

                    // Creating a fragment transaction
                    FragmentTransaction ft = fragmentManager.beginTransaction();

                    // Adding a fragment to the fragment transaction
                    ft.replace(R.id.content_frame, rFragment);

                    // Committing the transaction
                    ft.commit();

                    // Closing the drawer
                    mDrawerLayout.closeDrawer(mDrawerList);
            }
        });
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        mDrawerToggle.syncState();
    }

    /** Handling the touch event of app icon */
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /** Called whenever we call invalidateOptionsMenu() */
    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        // If the drawer is open, hide action items related to the content view
        boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);

        menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
        return super.onPrepareOptionsMenu(menu);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

RiverFragment

public class RiverFragment extends Fragment{

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

        // Retrieving the currently selected item number
        int position = getArguments().getInt("position");

        // List of rivers
        String[] rivers = getResources().getStringArray(R.array.rivers);

        // Creating view correspoding to the fragment
        View v = inflater.inflate(R.layout.fragment_layout, container, false);

        // Getting reference to the TextView of the Fragment
        TextView tv = (TextView) v.findViewById(R.id.tv_content);

        // Setting currently selected river name in the TextView
        tv.setText(rivers[position]);

        // Updating the action bar title
        getActivity().getActionBar().setTitle(rivers[position]);

        return v;
    }
}

activity_main.xml中

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
        android:layout_gravity="start">
    <!-- The main content view -->
    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
    <!-- The navigation drawer -->
    <ListView android:id="@+id/drawer_list"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="#111"/>
</android.support.v4.widget.DrawerLayout>

Answer 1

添加两个组件，一个用于右侧，另一个用于左侧。使用：

android:layout_gravity="start" (Right side)
android:layout_gravity="end" (Left side)

请注意，它们将针对RTL语言进行反转。

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/dlMenu"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <!-- Main content -->

    <FrameLayout
        android:id="@+id/flMainContent"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </FrameLayout>

    <!-- Left Drawer Layout -->

    <ListView
        android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="@android:color/white" />

    <!-- Right Drawer Layout -->

    <ListView
        android:id="@+id/right_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="end"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="@android:color/white" />

</android.support.v4.widget.DrawerLayout>

参考文献：
DrawerLayout Double Drawer (Left and Right Drawers simultaneously)
http://developer.android.com/training/implementing-navigation/nav-drawer.html

如何在右侧和左侧制作应用程序抽屉？ Android的

1 个答案: