DrawerLayout是SupportLibrary包中实现的侧滑菜单效果的控件。

分为主内容区域和侧边菜单区域

drawerLayout本身就支持：侧边菜单根据手势展开与隐藏，

开发者只需要实现：主内容区的内容和菜单的点击变化即可。

API：https://developer.android.com/reference/android/support/v4/widget/DrawerLayout.html

1. DrawerLayout本身就是一个顶级容器，只需要按照规定的布局方式写布局就会有侧滑效果：

规定：

  • DrawerLayout要包括两个子视图，分别为主内容区布局和侧滑菜单布局，并且主内容区布局要放到侧滑菜单布局的前面；
  • 主内容布局需要设置宽高为match_parent，且不能设置layout_gravity;
  • 侧滑菜单布局一般高度为match_parent，宽度为固定值；
  • 侧滑菜单布局需要设置layout_gravity属性，start表示左边，end表示右边，不设置时会默认显示且不能滑动；
  • 侧滑菜单布局（drawer）只能有一个，多于一个会报错；
  • 主内容布局和侧滑菜单布局，使用何种样式的布局没有强制限制。
<?xml version="1.0" encoding="utf-8"?>

<android.support.v4.widget.DrawerLayout

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

    xmlns:app="http://schemas.android.com/apk/res-auto"

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

    android:id="@+id/palyer_drawer_layout"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:fitsSystemWindows="true"

    tools:context=".PlayerActivity"

    >

    <RelativeLayout

        android:layout_width="match_parent"

        android:layout_height="match_parent">

        <TextView

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_marginTop="200dp"

            android:layout_marginLeft="200dp"

            android:text="这是主区域"/>

    </RelativeLayout>

    <LinearLayout

        android:orientation="vertical"

        android:layout_width="200dp"

        android:layout_gravity="start"

        android:layout_height="match_parent"

        android:background="#ff00B8D4">

        <TextView

            android:layout_width="match_parent"

            android:layout_height="50dp"

            android:text="这是菜单栏"/>

        <Button

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="菜单一"/>

        <Button

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="菜单二"/>

    </LinearLayout>

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

2. DrawerLayout.DrawerListener可以监听drawer的状态变化和运动过程

只想继承某个或者某些方法，使用DrawerLayout.SimpleDrawerListener，这是DrawerListener接口的简单实现；

注意：要避免执行昂贵的动画，必须要做动画可以在STATE_IDLE状态时执行；

package com.media.customplayer;

import android.support.v4.widget.DrawerLayout;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

public class PlayerActivity extends AppCompatActivity {

    private final String TAG = "PlayerActivity";

    private DrawerLayout mPlayerDrawer;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_player);

        mPlayerDrawer = (DrawerLayout) findViewById(R.id.palyer_drawer_layout);

        mPlayerDrawer.addDrawerListener(new DrawerLayout.DrawerListener() {

            @Override

            public void onDrawerSlide(View drawerView, float slideOffset) {

                Log.v(TAG, "onDrawerSlide: slideOffset = " + slideOffset);

            }

            @Override

            public void onDrawerOpened(View drawerView) {

                Log.v(TAG, "onDrawerOpened");

            }

            @Override

            public void onDrawerClosed(View drawerView) {

                Log.v(TAG, "onDrawerClosed");

            }

            @Override

            public void onDrawerStateChanged(int newState) {

                Log.v(TAG, "onDrawerStateChanged: newState = " + newState);

            }

        });

    }

}

一次展示和隐藏的日志如下：

07-10 09:57:20.336 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerStateChanged: newState = 1

07-10 09:57:20.356 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.045

07-10 09:57:20.366 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.10666667

07-10 09:57:20.386 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.16666667

07-10 09:57:20.406 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.23

07-10 09:57:20.416 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.29666665

07-10 09:57:20.436 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.36166668

07-10 09:57:20.446 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.42333335

07-10 09:57:20.476 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.50166667

07-10 09:57:20.486 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.5516667

07-10 09:57:20.506 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.60333335

07-10 09:57:20.526 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.655

07-10 09:57:20.536 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.7133333

07-10 09:57:20.556 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.7816667

07-10 09:57:20.576 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.8516667

07-10 09:57:20.586 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.92833334

07-10 09:57:20.606 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 1.0

07-10 09:57:20.636 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerOpened

07-10 09:57:20.646 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerStateChanged: newState = 0

07-10 09:57:40.546 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerStateChanged: newState = 1

07-10 09:57:40.566 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.9633333

07-10 09:57:40.586 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.92333335

07-10 09:57:40.596 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.89166665

07-10 09:57:40.616 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.8616667

07-10 09:57:40.636 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.83666664

07-10 09:57:40.646 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.81166667

07-10 09:57:40.666 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.7916667

07-10 09:57:40.686 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.7683333

07-10 09:57:40.696 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.74833333

07-10 09:57:40.716 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.73

07-10 09:57:40.736 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.71666664

07-10 09:57:40.746 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.70166665

07-10 09:57:40.766 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.6933333

07-10 09:57:40.786 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.67833334

07-10 09:57:40.796 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.66333336

07-10 09:57:40.816 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.645

07-10 09:57:40.836 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.62833333

07-10 09:57:40.846 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.615

07-10 09:57:40.866 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.6

07-10 09:57:40.876 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.58666664

07-10 09:57:40.896 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.57166666

07-10 09:57:40.916 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.55333334

07-10 09:57:40.926 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.53333336

07-10 09:57:40.946 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.515

07-10 09:57:40.966 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.49833333

07-10 09:57:40.976 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.48833334

07-10 09:57:40.996 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.47333333

07-10 09:57:41.016 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.46

07-10 09:57:41.026 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.44333333

07-10 09:57:41.046 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.42833334

07-10 09:57:41.066 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.41333333

07-10 09:57:41.076 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.39666668

07-10 09:57:41.096 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.38333333

07-10 09:57:41.116 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.37

07-10 09:57:41.126 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.35666665

07-10 09:57:41.146 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.34833333

07-10 09:57:41.156 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.33333334

07-10 09:57:41.176 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.32

07-10 09:57:41.196 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.30666667

07-10 09:57:41.206 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.29666665

07-10 09:57:41.226 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.28666666

07-10 09:57:41.246 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.27333334

07-10 09:57:41.256 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.25833333

07-10 09:57:41.276 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.23833333

07-10 09:57:41.296 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.22

07-10 09:57:41.306 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.20333333

07-10 09:57:41.326 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.18666667

07-10 09:57:41.346 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.17166667

07-10 09:57:41.356 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.15166667

07-10 09:57:41.376 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.13

07-10 09:57:41.386 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.108333334

07-10 09:57:41.406 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.08833333

07-10 09:57:41.436 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerStateChanged: newState = 2

07-10 09:57:41.446 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.086666666

07-10 09:57:41.456 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.065

07-10 09:57:41.476 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.046666667

07-10 09:57:41.486 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.033333335

07-10 09:57:41.506 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.023333333

07-10 09:57:41.526 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.015

07-10 09:57:41.536 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.01

07-10 09:57:41.556 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.006666667

07-10 09:57:41.576 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.0033333334

07-10 09:57:41.586 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.0016666667

07-10 09:57:41.626 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerSlide: slideOffset = 0.0

07-10 09:57:41.646 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerClosed

07-10 09:57:41.646 27804-27804/com.media.customplayer V/PlayerActivity: onDrawerStateChanged: newState = 0

3. 主动展开：DrawerLayout.openDrawer

主动隐藏：DrawerLayout.closeDrawer

package com.media.customplayer;

import android.support.v4.view.GravityCompat;

import android.support.v4.widget.DrawerLayout;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

import android.view.Gravity;

import android.view.View;

import java.util.Timer;

import java.util.TimerTask;

public class PlayerActivity extends AppCompatActivity {

    private final String TAG = "PlayerActivity";

    private DrawerLayout mPlayerDrawer;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_player);

        mPlayerDrawer = (DrawerLayout) findViewById(R.id.palyer_drawer_layout);

        mPlayerDrawer.addDrawerListener(new DrawerLayout.DrawerListener() {

            @Override

            public void onDrawerSlide(View drawerView, float slideOffset) {

                Log.v(TAG, "onDrawerSlide: slideOffset = " + slideOffset);

            }

            @Override

            public void onDrawerOpened(View drawerView) {

                Log.v(TAG, "onDrawerOpened");

            }

            @Override

            public void onDrawerClosed(View drawerView) {

                Log.v(TAG, "onDrawerClosed");

            }

            @Override

            public void onDrawerStateChanged(int newState) {

                Log.v(TAG, "onDrawerStateChanged: newState = " + newState);

            }

        });

        mPlayerDrawer.openDrawer(GravityCompat.START, true);

        final Timer timer = new Timer();

        TimerTask task = new TimerTask() {

            @Override

            public void run() {

                mPlayerDrawer.closeDrawer(GravityCompat.START, true);

                timer.cancel();

            }

        };

        timer.schedule(task, 2000);

    }

}

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