基于Android官方DrawerLayout实现抽屉导航菜单

基于Android官方DrawerLayout实现抽屉导航菜单

我之前写了一篇文章，基于第三方开源框架Android SlidingMenu实现抽屉导航菜单，文章链接地址：http://blog.csdn.net/zhangphil/article/details/44078805
事实上实现Android抽屉导航菜单的技术选型方案不少，其中还有一种方案就是基于Android官方的DrawerLayout。
如图1，图2所示就是基于Android官方DrawerLayout实现抽屉导航菜单。
图1

图2

Android DrawerLayout是Android在android-support-v4中引入的一个新的View组件，其本身继承自ViewGroup。使用DrawerLayout首先需要在项目代码中引入android-support-v4.jar包，好在现在基本上android-support-v4.jar包在Eclipse工程中已经默认添加。
开始写DrawerLayout代码实现抽屉导航菜单。
（1）首先写一个布局文件activity_main.xml。

<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" >    <FrameLayout        android:id="@+id/content_frame"        android:layout_width="match_parent"        android:layout_height="match_parent" />    <ListView        android:id="@+id/left_drawer"        android:layout_width="100dip"        android:layout_height="match_parent"        android:layout_gravity="left"        android:background="#42a5f5"        android:choiceMode="singleChoice"        android:divider="@android:color/transparent"        android:dividerHeight="5dip" /></android.support.v4.widget.DrawerLayout>

在这本布局文件中，最上面的android:id="@+id/content_frame"的FrameLayout即为要打算盛放具体页面和内容容器。
而android:id="@+id/left_drawer"的ListView即为将要滑入滑出的导航菜单。为此ListView设置android:layout_gravity="left"，表示告知Android系统导航菜单要从左边滑入滑出。如果为“right”则表示要从右边滑入滑出。

（2）布局文件写完后，接下来就可以写代码实现。

package zhangphil.navigationdrawer;import android.app.Activity;import android.app.Fragment;import android.app.FragmentManager;import android.content.res.Configuration;import android.os.Bundle;import android.support.v4.app.ActionBarDrawerToggle;import android.support.v4.widget.DrawerLayout;import android.view.Gravity;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {private static Activity activity;private DrawerLayout mDrawerLayout;private ListView mDrawerList;private ActionBarDrawerToggle mDrawerToggle;private CharSequence mDrawerTitle;private CharSequence mTitle;private static String[] mTitles = { "A", "B", "C", "D", "E" };@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);activity = this;setContentView(R.layout.activity_main);mTitle = mDrawerTitle = this.getTitle();mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);mDrawerList = (ListView) findViewById(R.id.left_drawer);// mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,// GravityCompat.START);mDrawerList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mTitles));mDrawerList.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {selectItem(position);}});getActionBar().setDisplayHomeAsUpEnabled(true);getActionBar().setHomeButtonEnabled(true);mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.drawable.ic_drawer, R.string.drawer_open,R.string.drawer_close) {@Overridepublic void onDrawerClosed(View view) {getActionBar().setTitle(mTitle);Toast.makeText(activity, "抽屉关闭", Toast.LENGTH_SHORT).show();// invalidateOptionsMenu();}@Overridepublic void onDrawerOpened(View drawerView) {getActionBar().setTitle(mDrawerTitle);Toast.makeText(activity, "抽屉打开", Toast.LENGTH_SHORT).show();// invalidateOptionsMenu();}};mDrawerLayout.setDrawerListener(mDrawerToggle);if (savedInstanceState == null) {selectItem(0);}}private void selectItem(int position) {Fragment fragment = new TextFragment();Bundle args = new Bundle();args.putInt(TextFragment.NUMBER, position);fragment.setArguments(args);FragmentManager fragmentManager = getFragmentManager();fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();mDrawerList.setItemChecked(position, true);setTitle(mTitles[position]);mDrawerLayout.closeDrawer(mDrawerList);}@Overridepublic void setTitle(CharSequence title) {mTitle = title;getActionBar().setTitle(mTitle);}// @Override// public boolean onCreateOptionsMenu(Menu menu) {// return super.onCreateOptionsMenu(menu);// }@Overrideprotected void onPostCreate(Bundle savedInstanceState) {super.onPostCreate(savedInstanceState);mDrawerToggle.syncState();}@Overridepublic void onConfigurationChanged(Configuration newConfig) {super.onConfigurationChanged(newConfig);mDrawerToggle.onConfigurationChanged(newConfig);}@Overridepublic boolean onPrepareOptionsMenu(Menu menu) {// boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);return super.onPrepareOptionsMenu(menu);}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {if (mDrawerToggle.onOptionsItemSelected(item)) {return true;}return super.onOptionsItemSelected(item);}public static class TextFragment extends Fragment {public static final String NUMBER = "number";@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {int i = getArguments().getInt(NUMBER);String title = mTitles[i];TextView text = new TextView(activity);text.setText("内容:" + title);text.setTextSize(50.0f);text.setGravity(Gravity.CENTER);activity.setTitle("标题:" + title);return text;}}}

DrawerLayout可以设置一个监听事件类setDrawerListener(new ActionBarDrawerToggle())监听抽屉导航菜单的打开、关闭状态。

我将此例的全部工程代码压缩成一个zip文件，上传到CSDN供有兴趣的朋友下载，下载链接：http://download.csdn.net/detail/zhangphil/9136213

此压缩包下载后直接作为Android Eclipse的工程导入即可跑起来。

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