Android DrawerLayout实现侧拉菜单功能

效果图

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context="com.example.lenovo.mydrawerlayout.MainActivity">
<android.support.v4.widget.DrawerLayout
  android:layout_width="match_parent"
  android:id="@+id/drawer_layout"
  android:layout_height="match_parent">
  <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >
    <android.support.v7.widget.Toolbar
      android:id="@+id/toolbar"
      android:layout_width="match_parent"
      android:layout_height="?attr/actionBarSize"
      android:background="?attr/colorPrimary"
      app:popupTheme="@style/AppTheme.PopupOverlay" />
    <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="这是主界面"
      />
  </LinearLayout>
  <LinearLayout
    android:layout_width="300dp"
    android:layout_height="match_parent"
    android:layout_gravity="left"
    android:background="#f00"
    >
    <TextView
      android:id="@+id/t"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="这是侧拉界面"
      />
  </LinearLayout>
</android.support.v4.widget.DrawerLayout>
</LinearLayout> 

注：DrawerLayout下有两个布局，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，DrawerLayout的第二个子元素是抽屉中的内容，即抽屉布局，layout_gravity为侧拉方向

因为用到Toolbar所以要把ActionBar替换了所以设置

values下设置styles.xml    为NoActionBar

<resources>
   <!-- Base application theme. -->
  <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
  </style>
  <style name="AppTheme.NoActionBar">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
  </style>
  <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
  <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
</resources> 

MainActivity

package com.example.lenovo.mydrawerlayout;
 import android.os.Bundle;
import android.support.design.widget.Snackbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //Toolbar代替ActionBar
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    // DrawerLayout
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    //Toolbar上面最左边显示三杠图标监听DrawerLayout
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
        this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.setDrawerListener(toggle);
    toggle.syncState();
    //侧拉页面字体
    TextView t= (TextView) findViewById(R.id.t);
    t.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        Snackbar.make(v, "侧拉页面", Snackbar.LENGTH_LONG)
            .setAction("Action", null).show();
      }
    });
  }
  @Override
  public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
      drawer.closeDrawer(GravityCompat.START);
    } else {
      super.onBackPressed();
    }
  }
}