Android抽屉布局DrawerLayout的简单使用

<?xml version="1.0" encoding="utf-8"?>
<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" >
 
    <!-- 主界面的布局，必须放在抽屉的前面 -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
 
    <!-- 抽屉的内容 -->
    <TextView
        android:id="@+id/left_drawer"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#ffffff"
        android:layout_gravity="left"
        android:text="这是一个抽屉布局"
        />
 
</android.support.v4.widget.DrawerLayout>

package com.example.administrator.myapplication;
 
import android.os.Bundle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
 
public class MainActivity extends AppCompatActivity {
    private DrawerLayout drawerLayout;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 获取抽屉布局控件
        drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.setDisplayHomeAsUpEnabled(true);// 显示导航按钮
            actionBar.setHomeAsUpIndicator(R.drawable.index_white);// 修改默认图标
        }
    }
 
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:// HomeAsUp按钮的id永远是android.R.id.home
                drawerLayout.openDrawer(GravityCompat.START);// 显示抽屉布局
                break;
            default:
                break;
        }
        return true;
    }
}

package com.example.administrator.myapplication;
 
import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
 
public class MainActivity extends AppCompatActivity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}