android开发(38) 使用 DrawerLayou t实现左侧抽屉式导航菜单

最近流行 左侧抽屉式的导航条菜单，知乎，360，QQ都使用了这样的导航菜单，我们也了解下：

　　Android Design 的流行趋势：Navigation Drawer 导航抽屉

参考这篇文章：http://www.geekpark.net/topics/183724

效果图：

　　               

特点

　　1.标题栏（或者actionBar) 做的有个 菜单图标按钮（三条线或者其他）。一般这样的标题栏左侧和右侧都会有图标按钮。如图1所示。

　　2.点击图标按钮 从左侧向右 慢慢退出一个 菜单视图(View)，遮盖在 内容页（首页）的视图上，同时，产生遮盖层。如图2所示。

怎么实现？

　　官方示例

　　　　参考自谷歌开发者网站的示例，在这个页面可以下载到示例。http://developer.android.com/training/implementing-navigation/nav-drawer.html

　　引用类库

　　　　需要android-support-v4.jar

　　主要控件

　　　　谷歌提供的抽屉控件： android.support.v4.widget.DrawerLayout

　　　　参考这片文章的解释：http://blog.csdn.net/xiahao86/article/details/8995827

具体实现

　　首页（比如叫：MainActivity）内容布局，写一个 android.support.v4.widget.DrawerLayout，它需要包含两个内容视图元素，第一个视图元素是 主显示内容页，第二个是要抽屉弹出的视图。

<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" >

    <!--
         As the main content view, the view below consumes the entire
         space available using match_parent in both dimensions.
    -->

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

    <!--
         android:layout_gravity="start" tells DrawerLayout to treat
         this as a sliding drawer on the left side for left-to-right
         languages and on the right side for right-to-left languages.
         The drawer is given a fixed width in dp and extends the full height of
         the container. A solid background is used for contrast
         with the content view.
    -->

    <zyf.demo.navigationdrawer.NavigationMenu
        android:id="@+id/navigation_menu"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start" >
    </zyf.demo.navigationdrawer.NavigationMenu>

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

我在这里写了个自定义控件 “ zyf.demo.navigationdrawer.NavigationMenu " ，注意它的 android:layout_gravity="start" ，是 start 不是left。

MainActivity需要获得为DrawerLayout 注册一个回调事件接口ActionBarDrawerToggle ，这个事件的实现者监听器会获得 抽屉弹出（onDrawerOpened）和关闭（onDrawerClosed）的事件。

MainActivity 的代码

package zyf.demo.navigationdrawer;

import android.os.Bundle;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.res.Configuration;
import android.graphics.drawable.ColorDrawable;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {
    private NavigationMenu mNavigationMenu;
    private DrawerLayout mDrawerLayout;
    private ActionBarDrawerToggle mDrawerToggle;

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

        // 获得抽屉控件
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        // 获得菜单控件
        mNavigationMenu = (NavigationMenu) findViewById(R.id.navigation_menu);
        mNavigationMenu.attacthDrawer(mDrawerLayout);

        // enable ActionBar app icon to behave as action to toggle nav
        // drawer
        getActionBar().setDisplayHomeAsUpEnabled(true);
        // 使actionbar 的logo图标透明不可见
        getActionBar().setIcon(
                new ColorDrawable(getResources().getColor(
                        android.R.color.transparent)));

        // 注册导航菜单抽屉 的弹出和关闭事件
        mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
        mDrawerLayout, /* DrawerLayout object */
        R.drawable.ic_notification_content, /*
                                             * nav drawer image to replace 'Up'
                                             * caret
                                             */
        R.string.drawer_open, /* "open drawer" description for accessibility */
        R.string.drawer_close /* "close drawer" description for accessibility */
        ) {
            // 当导航菜单抽屉 关闭后
            public void onDrawerClosed(View view) {
                // 显示当前内容页的标题
                getActionBar().setTitle(getTitle());
                invalidateOptionsMenu(); // creates call to
                                            // onPrepareOptionsMenu()
            }

            // 当导航菜单抽屉 打开后
            public void onDrawerOpened(View drawerView) {
                // 显示导航菜单的标题
                getActionBar().setTitle(mNavigationMenu.getTitle());
                invalidateOptionsMenu(); // creates call to
                                            // onPrepareOptionsMenu()
            }
        };
        mDrawerLayout.setDrawerListener(mDrawerToggle);

        // 显示首页的内容
        showFragment(new HomeFragment());

        // 当更换主页内的 子页面(fragment)时,隐藏导航菜单
        mNavigationMenu.hide();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main, menu);
        return super.onCreateOptionsMenu(menu);
    }

    /* Called whenever we call invalidateOptionsMenu() */
    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        // If the nav drawer is open, hide action items related to the content
        // view
        // 当弹出导航菜单时，使 actionbar的扩展按钮不可见
        boolean drawerOpen = mDrawerLayout.isDrawerOpen(mNavigationMenu);
        menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
        return super.onPrepareOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // The action bar home/up action should open or close the drawer.
        // ActionBarDrawerToggle will take care of this.
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        // Handle action buttons
        switch (item.getItemId()) {
        case R.id.action_websearch:
            Toast.makeText(this, "你点击了搜索按钮", Toast.LENGTH_LONG).show();
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

    private void showFragment(Fragment fragment) {
        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.content_frame, fragment).commit();
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        // Sync the toggle state after onRestoreInstanceState has occurred.
        mDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // Pass any configuration change to the drawer toggls
        mDrawerToggle.onConfigurationChanged(newConfig);
    }

}

下面给出我写的自定义控件的实现：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

 <ListView
        android:id="@+id/listView1"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:choiceMode="singleChoice"

        android:background="#FFFFFF"/>
</RelativeLayout>

package zyf.demo.navigationdrawer;

import android.content.Context;
import android.support.v4.widget.DrawerLayout;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Toast;

public class NavigationMenu extends RelativeLayout {
    LayoutInflater mLayoutInflater;
    ListView mlistView1;
    String[] menuItemsDataSource;
    private DrawerLayout mDrawerLayout;// 关联到的抽屉控件

    public NavigationMenu(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        initLayout(context);
    }

    public NavigationMenu(Context context, AttributeSet attrs) {
        super(context, attrs);
        initLayout(context);
    }

    public NavigationMenu(Context context) {
        super(context);
        initLayout(context);
    }

    private void initLayout(Context context) {
        mLayoutInflater = LayoutInflater.from(context);
        View contentView = mLayoutInflater.inflate(R.layout.navigation_menu,
                null);
        RelativeLayout.LayoutParams lp = new LayoutParams(
                LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
        this.addView(contentView, lp);

        mlistView1 = (ListView) contentView.findViewById(R.id.listView1);
        menuItemsDataSource = getResources().getStringArray(
                R.array.navigation_menu_items_array);

        mlistView1.setAdapter(new ArrayAdapter<String>(context,
                R.layout.navaigation_menu_list_view_item, menuItemsDataSource));
        mlistView1.setOnItemClickListener(new DrawerItemClickListener());
    }

    /**
     * 包含 的 listView的点击事件
     * @author yunfei
     *
     */
    private class DrawerItemClickListener implements
            ListView.OnItemClickListener {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id) {
            // selectItem(position);

            mlistView1.setItemChecked(position, true);
            hide();

            Toast.makeText(getContext(), "你选择了" + position, 0).show();
        }
    }

    public CharSequence getTitle() {
        return "导航菜单";
    }

    /**
     * 关联到 drawerLayout
     * @param drawerLayout
     */
    public void attacthDrawer(DrawerLayout drawerLayout) {
        mDrawerLayout = drawerLayout;
    }

    /**
     * 隐藏
     */
    public void hide() {
        if (mDrawerLayout != null)
            mDrawerLayout.closeDrawer(NavigationMenu.this);
    }

    /**
     * 出现
     */
    public void show() {
        if (mDrawerLayout != null)
            mDrawerLayout.openDrawer(NavigationMenu.this);
    }

}

代码下载： http://yunpan.cn/cggiDkFNCp2Jw 访问密码 c3ed

参考：

http://blog.csdn.net/xiahao86/article/details/8995827
http://developer.android.com/training/implementing-navigation/nav-drawer.html
http://www.geekpark.net/topics/183724