Android官方侧滑菜单DrawerLayout类似slidingMenu

想必大家都知道slidingMenu，不过android官方给了一个类似slidingMenu的控件，这就是DrawLayout。这个控件和linearLayout意思差不多也是继承自ViewGroup，可以把它看成是个容器。DrawerLayout是v4包下的控件，当然你的项目中必须要有v4包。
下面就来介绍一下它吧
1直接上代码了：（后面进行简单的介绍）

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/drawerlayout"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <FrameLayout        android:id="@+id/fragment_layout"        android:layout_width="match_parent"        android:layout_height="match_parent" >        <fragment            android:id="@+id/fm_1"            android:name="com.example.day1401.MyFragment"            android:layout_width="match_parent"            android:layout_height="match_parent" />    </FrameLayout>    <RelativeLayout        android:id="@+id/left"        android:layout_width="200dp"        android:layout_height="match_parent"        android:layout_gravity="left"        android:background="@android:color/white" >        <ListView            android:id="@+id/left_listview"            android:layout_width="match_parent"            android:layout_height="match_parent" >        </ListView>    </RelativeLayout>    <RelativeLayout        android:id="@+id/right"        android:layout_width="260dp"        android:layout_height="match_parent"        android:layout_gravity="right"        android:background="#ff0000" >        <TextView            android:id="@+id/right_textview"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:text="个人登陆页面" />    </RelativeLayout></android.support.v4.widget.DrawerLayout>

在DrawerLayout中有三个部分分别是主界面，左菜单和右菜单，
以上布局分为三部分,一般情况下,第一部分是主步局,第二部分是左划的布局,第三部分是右划的布局,其实这里的左向滑动和右向滑动是通过gravity控制,左划界面android:layout_gravity=”left” 当然这里的left也可以用start代替,右划界面就理所当然的是android:layout_gravity=”right” ,同样right也可以用end代替
我在主菜单中添加了一个布局又在里边添加了一个Fragment，为的是添加一个简单的布局文件。
在左侧菜单中只添加了一个listView。
右侧的菜单中添加了一个textView。

2 再上代码

package com.example.day1401;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.support.v4.widget.DrawerLayout;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.RelativeLayout;public class MainActivity extends Activity {    private DrawerLayout drawerLayout;    private RelativeLayout leftLayout;    private RelativeLayout rightLayout;    private List<String> list;    private ArrayAdapter<String> adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        drawerLayout = (DrawerLayout) findViewById(R.id.drawerlayout);        leftLayout=(RelativeLayout) findViewById(R.id.left);        rightLayout=(RelativeLayout) findViewById(R.id.right);        ListView listView=(ListView) leftLayout.findViewById(R.id.left_listview);        initData();        adapter=new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, list);        listView.setAdapter(adapter);    }    private void initData() {        list=new ArrayList<String>();        list.add("新闻");        list.add( "订阅");        list.add("图片");        list.add( "视频");        list.add("跟帖");        list.add( "投票");    }}

这个代码比较简单，只是对控件进行了初始化，并没有添加任何的事件。实现上述步骤就能实现了类似slidingMenu的左右滑动的功能。

最后看一下它内部的源码
源码出处原文：http://blog.csdn.net/elinavampire/article/details/41477525

/**     * Listener for monitoring events about drawers.     */    public interface DrawerListener {        /**         * Called when a drawer's position changes.         * @param drawerView The child view that was moved         * @param slideOffset The new offset of this drawer within its range, from 0-1         */        public void onDrawerSlide(View drawerView, float slideOffset);        /**         * Called when a drawer has settled in a completely open state.         * The drawer is interactive at this point.         *         * @param drawerView Drawer view that is now open         */        public void onDrawerOpened(View drawerView);        /**         * Called when a drawer has settled in a completely closed state.         *         * @param drawerView Drawer view that is now closed         */        public void onDrawerClosed(View drawerView);        /**         * Called when the drawer motion state changes. The new state will         * be one of {@link #STATE_IDLE}, {@link #STATE_DRAGGING} or {@link #STATE_SETTLING}.         *         * @param newState The new drawer motion state         */        public void onDrawerStateChanged(int newState);    }

onDrawerSlide(View drawerView, float slideOffset)抽屉改变时使用

onDrawerOpened(View drawerView);打开抽屉

onDrawerClosed(View drawerView)关闭抽屉

onDrawerStateChanged(int newState);改变抽屉的状态

/**     * Set a simple drawable used for the left or right shadow.     * The drawable provided must have a nonzero intrinsic width.     *     * @param shadowDrawable Shadow drawable to use at the edge of a drawer     * @param gravity Which drawer the shadow should apply to     */    public void setDrawerShadow(Drawable shadowDrawable, int gravity) {        /*         * TODO Someone someday might want to set more complex drawables here.         * They're probably nuts, but we might want to consider registering callbacks,         * setting states, etc. properly.         */        final int absGravity = GravityCompat.getAbsoluteGravity(gravity,                ViewCompat.getLayoutDirection(this));        if ((absGravity & Gravity.LEFT) == Gravity.LEFT) {            mShadowLeft = shadowDrawable;            invalidate();        }        if ((absGravity & Gravity.RIGHT) == Gravity.RIGHT) {            mShadowRight = shadowDrawable;            invalidate();        }    }

上面这个方法是为了设置用于左或右阴影的简单可拉伸。所提供的可拉伸必须有一个非零固有宽度

public void setScrimColor(int color) {        mScrimColor = color;        invalidate();    }

设置用于该掩盖的主要内容，而抽屉打开网眼织物的颜色

public void setDrawerLockMode(int lockMode, int edgeGravity) {        final int absGravity = GravityCompat.getAbsoluteGravity(edgeGravity,                ViewCompat.getLayoutDirection(this));        if (absGravity == Gravity.LEFT) {            mLockModeLeft = lockMode;        } else if (absGravity == Gravity.RIGHT) {            mLockModeRight = lockMode;        }        if (lockMode != LOCK_MODE_UNLOCKED) {            // Cancel interaction in progress            final ViewDragHelper helper = absGravity == Gravity.LEFT ? mLeftDragger : mRightDragger;            helper.cancel();        }        switch (lockMode) {            case LOCK_MODE_LOCKED_OPEN:                final View toOpen = findDrawerWithGravity(absGravity);                if (toOpen != null) {                    openDrawer(toOpen);                }                break;            case LOCK_MODE_LOCKED_CLOSED:                final View toClose = findDrawerWithGravity(absGravity);                if (toClose != null) {                    closeDrawer(toClose);                }                break;            // default: do nothing        }    }

启用或禁用了所有的抽屉互动。