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。