看了很多應用，覺得這種側滑的抽屜效果的菜單很好。
不用切換到另一個頁面，也不用去按菜單的硬件按鈕，直接在界面上一個按鈕點擊，菜單就滑出來，而且感覺能放很多東西。
關于實現，搜索了一下，有如下兩種：
1.用SlidingDrawer：http://developer.android.com/reference/android/widget/SlidingDrawer.html
但是不知道為什么這個類官方不建議再繼續用了：Deprecated since API level 17
2.用DrawerLayout：http://developer.android.com/reference/android/support/v4/widget/DrawerLayout.html
Guide在這里：http://developer.android.com/training/implementing-navigation/nav-drawer.html
庫的引用
首先， DrawerLayout這個類是在Support Library里的，需要加上android-support-v4.jar這個包。
然后程序中用時在前面導入import android.support.v4.widget.DrawerLayout;
如果找不到這個類，首先用SDK Manager更新一下Android Support Library，然后在Android SDK/extras/android/support/v4路徑下找到android-support-v4.jar，復制到項目的libs路徑，將其Add to Build Path.
代碼1
布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <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" > <!-- The main content view --> <!-- main content must be the first element of DrawerLayout because it will be drawn first and drawer must be on top of it --> <FrameLayout android:id="@+id/content_frame" android:layout_width="match_parent" android:layout_height="match_parent" /> <!-- The navigation drawer --> <ListView android:id="@+id/left_drawer" android:layout_width="240dp" android:layout_height="match_parent" android:layout_gravity="left" android:background="#111" android:choiceMode="singleChoice" android:divider="@android:color/transparent" android:dividerHeight="0dp" /> </android.support.v4.widget.DrawerLayout></RelativeLayout>
DrawerLayout的第一個子元素是主要內容，即抽屜沒有打開時顯示的布局。這里采用了一個FrameLayout，里面什么也沒放。
DrawerLayout的第二個子元素是抽屜中的內容，即抽屜布局，這里采用了一個ListView。
主要的Activity（從官方實例中扒出來的）：
package com.example.hellodrawer;import android.os.Bundle;import android.app.Activity;import android.content.res.Configuration;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ArrayAdapter;import android.widget.ListView;import android.support.v4.app.ActionBarDrawerToggle;import android.support.v4.view.GravityCompat;import android.support.v4.widget.DrawerLayout;public class HelloDrawerActivity extends Activity{ private String[] mPlanetTitles; private DrawerLayout mDrawerLayout; private ActionBarDrawerToggle mDrawerToggle; private ListView mDrawerList; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_hello_drawer); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); // init the ListView and Adapter, nothing new initListView(); // set a custom shadow that overlays the main content when the drawer // opens mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close) { /** Called when a drawer has settled in a completely closed state. */ public void onDrawerClosed(View view) { invalidateOptionsMenu(); // creates call to // onPrepareOptionsMenu() } /** Called when a drawer has settled in a completely open state. */ public void onDrawerOpened(View drawerView) { invalidateOptionsMenu(); // creates call to // onPrepareOptionsMenu() } }; // Set the drawer toggle as the DrawerListener mDrawerLayout.setDrawerListener(mDrawerToggle); // enable ActionBar app icon to behave as action to toggle nav drawer getActionBar().setDisplayHomeAsUpEnabled(true); // getActionBar().setHomeButtonEnabled(true); // Note: getActionBar() Added in API level 11 } private void initListView() { mDrawerList = (ListView) findViewById(R.id.left_drawer); mPlanetTitles = getResources().getStringArray(R.array.planets_array); // Set the adapter for the list view mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.list_item, mPlanetTitles)); // Set the list's click listener mDrawerList.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // Highlight the selected item, update the title, and close the // drawer mDrawerList.setItemChecked(position, true); setTitle(mPlanetTitles[position]); mDrawerLayout.closeDrawer(mDrawerList); } }); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); mDrawerToggle.onConfigurationChanged(newConfig); } @Override public boolean onOptionsItemSelected(MenuItem item) { // Pass the event to ActionBarDrawerToggle, if it returns // true, then it has handled the app icon touch event if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } // Handle your other action bar items... return super.onOptionsItemSelected(item); }}比較糾結的是用了Level 11的一個API，這樣minSdkVersion就有限制，不能太低。
圖片資源Android官網示例處提供下載了。
程序運行后效果如下：
抽屜打開前：
抽屜打開后：
代碼2
今天又看了一下DrawerLayout的類，發現有很多方法可以直接用的。
重新試了一下，其實不用上面那么麻煩，隨便自己定義一個按鈕控制抽屜的打開就行：
布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".DrawerActivity" > <android.support.v4.widget.DrawerLayout android:id="@+id/drawer_layout" android:layout_width="match_parent" android:layout_height="match_parent" > <!-- The main content view --> <FrameLayout android:id="@+id/content_frame" android:layout_width="match_parent" android:layout_height="match_parent" > <Button android:id="@+id/btn" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="open" /> </FrameLayout> <!-- The navigation drawer --> <ListView android:id="@+id/left_drawer" android:layout_width="240dp" android:layout_height="match_parent" android:layout_gravity="start" android:background="#111" android:choiceMode="singleChoice" android:divider="@android:color/transparent" android:dividerHeight="0dp" /> </android.support.v4.widget.DrawerLayout></RelativeLayout>
主要代碼：
package com.example.hellodrawer;import android.os.Bundle;import android.app.Activity;import android.support.v4.widget.DrawerLayout;import android.view.Gravity;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class DrawerActivity extends Activity{ private DrawerLayout mDrawerLayout = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_drawer); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); Button button = (Button) findViewById(R.id.btn); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // 按鈕按下，將抽屜打開 mDrawerLayout.openDrawer(Gravity.LEFT); } }); }}以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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