Android -- DrawerLayout

抽屉效果的导航菜单                                                                  

喜欢知乎的都应该装的用知乎日报吧~这里指Android的不是IOS的。知乎日报的导航菜单就是用DrawerLayout实现的。

觉得这种侧滑的抽屉效果的菜单很好。

不用切换到另一个页面，也不用去按菜单的硬件按钮，直接在界面上一个按钮点击，菜单就滑出来，而且感觉能放很多东西。

 

 

 

 

 

android-support-v4.jar                                                             

首先， DrawerLayout这个类是在Support Library里的，需要加上android-support-v4.jar这个包。

然后程序中用时在前面导入import android.support.v4.widget.DrawerLayout;

如果找不到这个类，首先用SDK Manager更新一下Android Support Library，然后在Android SDK\extras\android\support\v4路径下找到android-support-v4.jar，复制到项目的libs路径，将其Add to Build Path.

Code                                                                                   

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent" >



    <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" >



        <!-- The main content view -->

        <!-- main content must be the first element of DrawerLayout because it will be drawn first and drawer must be on top of it -->



        <FrameLayout

            android:id="@+id/content_frame"

            android:layout_width="match_parent"

            android:layout_height="match_parent" />



        <!-- The navigation drawer -->



        <ListView

            android:id="@+id/left_drawer"

            android:layout_width="240dp"

            android:layout_height="match_parent"

            android:layout_gravity="left"

            android:background="#111"

            android:choiceMode="singleChoice"

            android:divider="@android:color/transparent"

            android:dividerHeight="0dp" />

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



</RelativeLayout>

DrawerLayout的第一个子元素是主要内容，即抽屉没有打开时显示的布局。这里采用了一个FrameLayout，里面什么也没放。

DrawerLayout的第二个子元素是抽屉中的内容，即抽屉布局，这里采用了一个ListView。

import android.os.Bundle;

import android.app.Activity;

import android.content.res.Configuration;

import android.view.MenuItem;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.support.v4.app.ActionBarDrawerToggle;

import android.support.v4.view.GravityCompat;

import android.support.v4.widget.DrawerLayout;



public class HelloDrawerActivity extends Activity

{



    private String[] mPlanetTitles;

    private DrawerLayout mDrawerLayout;

    private ActionBarDrawerToggle mDrawerToggle;

    private ListView mDrawerList;



    @Override

    public void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_hello_drawer);



        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);



        // init the ListView and Adapter, nothing new

        initListView();



        // set a custom shadow that overlays the main content when the drawer

        // opens

        mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,

                GravityCompat.START);



        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,

                R.drawable.ic_drawer, R.string.drawer_open,

                R.string.drawer_close)

        {



            /** Called when a drawer has settled in a completely closed state. */

            public void onDrawerClosed(View view)

            {



                invalidateOptionsMenu(); // creates call to

                                            // onPrepareOptionsMenu()

            }



            /** Called when a drawer has settled in a completely open state. */

            public void onDrawerOpened(View drawerView)

            {



                invalidateOptionsMenu(); // creates call to

                                            // onPrepareOptionsMenu()

            }

        };



        // Set the drawer toggle as the DrawerListener

        mDrawerLayout.setDrawerListener(mDrawerToggle);



        // enable ActionBar app icon to behave as action to toggle nav drawer

        getActionBar().setDisplayHomeAsUpEnabled(true);

        // getActionBar().setHomeButtonEnabled(true);

        // Note: getActionBar() Added in API level 11

    }



    private void initListView()

    {

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



        mPlanetTitles = getResources().getStringArray(R.array.planets_array);



        // Set the adapter for the list view

        mDrawerList.setAdapter(new ArrayAdapter<String>(this,

                R.layout.list_item, mPlanetTitles));

        // Set the list's click listener

        mDrawerList.setOnItemClickListener(new OnItemClickListener()

        {



            @Override

            public void onItemClick(AdapterView<?> parent, View view,

                    int position, long id)

            {

                // Highlight the selected item, update the title, and close the

                // drawer

                mDrawerList.setItemChecked(position, true);

                setTitle(mPlanetTitles[position]);

                mDrawerLayout.closeDrawer(mDrawerList);

            }

        });

    }



    @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);

        mDrawerToggle.onConfigurationChanged(newConfig);

    }



    @Override

    public boolean onOptionsItemSelected(MenuItem item)

    {

        // Pass the event to ActionBarDrawerToggle, if it returns

        // true, then it has handled the app icon touch event

        if (mDrawerToggle.onOptionsItemSelected(item))

        {

            return true;

        }

        // Handle your other action bar items...



        return super.onOptionsItemSelected(item);

    }



}

例子是从官方实例中扒出来的，比较纠结的是用了Level 11的一个API，这样minSdkVersion就有限制，不能太低。

Or Code                                                                               

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".DrawerActivity" >



    <android.support.v4.widget.DrawerLayout

        android:id="@+id/drawer_layout"

        android:layout_width="match_parent"

        android:layout_height="match_parent" >



        <!-- The main content view -->



        <FrameLayout

            android:id="@+id/content_frame"

            android:layout_width="match_parent"

            android:layout_height="match_parent" >



            <Button

                android:id="@+id/btn"

                android:layout_width="match_parent"

                android:layout_height="wrap_content"

                android:text="open" 

                />

        </FrameLayout>



        <!-- The navigation drawer -->



        <ListView

            android:id="@+id/left_drawer"

            android:layout_width="240dp"

            android:layout_height="match_parent"

            android:layout_gravity="start"

            android:background="#111"

            android:choiceMode="singleChoice"

            android:divider="@android:color/transparent"

            android:dividerHeight="0dp" />

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



</RelativeLayout>

public class DrawerActivity extends Activity

{

    private DrawerLayout mDrawerLayout = null;



    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_drawer);



        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);



        Button button = (Button) findViewById(R.id.btn);

        button.setOnClickListener(new OnClickListener()

        {



            @Override

            public void onClick(View v)

            {

                // 按钮按下，将抽屉打开

                mDrawerLayout.openDrawer(Gravity.LEFT);



            }

        });

    }



}

我是天王盖地虎的分割线                                                             

 

 

参考：http://www.cnblogs.com/mengdd/p/3213378.html