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Android侧滑菜单DrawerLayout(抽屉布局)实现

2024-07-07 16:53:22   226人阅读

应用场景：

           由于侧滑菜单有更好的用户体验效果，所以更多的App使用侧滑抽屉式菜单列表，如网易客户端、百度影音、爱奇艺等等。至此，侧滑菜单有了更多的使用需求。

知识点介绍：

        实现侧滑菜单功能的方法有很多，如果开源的项目SlidingMenu，下载地址为https://github.com/jfeinstein10/SlidingMenu。该开源项目依赖于另一个开源项目ActionBarSherlock，下载地址为https://github.com/JakeWharton/ActionBarSherlock。这种实现方式，读者可以平时有时间自行研究一下。本例主要介绍android-support-v4.jar提供的支持，android.support.v4.widget.DrawerLayout，可兼容低版本的系统。

使用方式：

第一步：新建测试项目DrawerLayout。
第二步：编写相关的布局文件，主界面布局文件activity_main.xml。
<LinearLayout 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:orientation="vertical"
    tools:context=".MainActivity" >
    <android.support.v4.widget.DrawerLayout
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/white" >
        <FrameLayout
            android:id="@+id/fragment_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@android:color/white" >
            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:text="主内容界面" />
        </FrameLayout>
        <!-- 
        android:layout_gravity="start" 侧滑菜单在左边
        android:layout_gravity="start" 侧滑菜单在右边
         -->
        <LinearLayout
            android:id="@+id/menu_layout"
            android:layout_width="180dp"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:background="@android:color/white"
            android:orientation="vertical" >
            <ImageView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:src=http://www.mamicode.com/"@drawable/ic_launcher" />>Fragment类的布局文件layout_first.xml，layout_next.xml。
【layout_first.xml】
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView 
        android:layout_width="match_parent"
        android:layout_height="20dp"
        android:text="FirstFragment"
        android:id="@+id/textTextView"/>
    <LinearLayout android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <ListView android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:cacheColorHint="#FFFFFF"
            android:id="@+id/firstFragmentListView">
        </ListView>
    </LinearLayout>
</LinearLayout>

【layout_next.xml】
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView 
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:text="NextFragment"/>
</LinearLayout>

ListView的ListItem的布局文件main_listitem.xml。
【main_listitem.xml】
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView android:layout_width="match_parent"
        android:layout_height="40dp"
        android:id="@+id/menu"
        android:textSize="20dp"
        android:gravity="center_vertical"
        android:text="加载中..."/>
</LinearLayout>
第二步：编写相关的java文件，FirstFragment.java、NextFragment、MainActivity.java、MenuListViewAdapter.java、DataBuiltUtils.java。
【FirstFragment.java】
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class FirstFragment extends Fragment{
	private TextView textView;
    private ListView listView; 
	
	@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        View layout = inflater.inflate(R.layout.layout_first, null);
        textView = (TextView) layout.findViewById(R.id.textTextView);
        textView.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				Toast.makeText(getActivity(), "FirstFragment", Toast.LENGTH_SHORT).show();
			}
		});
        listView = (ListView) layout.findViewById(R.id.firstFragmentListView);
        MenuListViewAdapter adapter = new MenuListViewAdapter(getActivity(), DataBuiltUtils.getFirstMapList());
        listView.setAdapter(adapter);
        return layout;
    }
}
【NextFragment.java】
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class NextFragment extends Fragment{
	
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        View layout = inflater.inflate(R.layout.layout_next, null);
        return layout;
    }
}

【MainActivity.java】
import java.util.ArrayList;
import java.util.HashMap;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.widget.DrawerLayout;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.AdapterView.OnItemClickListener;

/**
 * 抽屉效果
 * DrawerLayout与Fragment的联用
 * DrawerLayout相关：
 * 1.一般内容层使用framelayout
 * 2.slidingLayout需要设置一个layout_grative属性
 *   文档建议使用android:layout_gravity="start"
 */
public class MainActivity extends FragmentActivity{
   
    private DrawerLayout mDrawer_layout;  //抽屉式布局
    private LinearLayout mMenu_layout;   
                     
    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mDrawer_layout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mMenu_layout = (LinearLayout) findViewById(R.id.menu_layout);
        ListView menu_listview = (ListView) mMenu_layout.findViewById(R.id.menu_listView);
        ArrayList<HashMap<String, String>> tempMapList = DataBuiltUtils.getMainMapList();
        menu_listview.setAdapter(new MenuListViewAdapter( getApplicationContext(), tempMapList));
        //菜单ListView设置监听事件
        menu_listview.setOnItemClickListener(new DrawerItemClickListener());
    }
                     
    public class DrawerItemClickListener implements OnItemClickListener {
    	
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id){
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            Fragment fragment = null;
            //根据item点击行号判断启用指定Fragment
            switch (position){
                case 0:
                    fragment = new FirstFragment();
                    break;
                case 1:
                    fragment = new NextFragment();
                    break;
                default:
                	 fragment = new FirstFragment();
                    break;
            }
            ft.replace(R.id.fragment_layout, fragment);
            ft.commit();
            mDrawer_layout.closeDrawer(mMenu_layout);//点击后关闭mMenu_layout
        }
    }
}

【MenuListViewAdapter.java】
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class MenuListViewAdapter extends BaseAdapter {
	private List<HashMap<String, String>> lists;
	private LayoutInflater mInflater;
	private Context mainContext;

	public MenuListViewAdapter(Context context,
			List<HashMap<String, String>> dataList) {
		mInflater = LayoutInflater.from(context);
		mainContext = context;
		lists = dataList;
	}

	@Override
	public int getCount() {
		return lists.size();
	}

	@Override
	public Object getItem(int position) {
		return lists.get(position);
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
public View getView(final int position, View convertView, ViewGroup parent) {
		ViewHolder holder = null;
		if (convertView == null) {
			holder = new ViewHolder();
			convertView = mInflater.inflate(R.layout.main_listitem, null);
			holder.menu = (TextView) convertView.findViewById(R.id.menu);
			convertView.setTag(holder);
		} else {
			holder = (ViewHolder) convertView.getTag();
		}
		// 设置背景色
		// if(position%2==1){
		// convertView.setBackgroundColor(Color.rgb(220, 220, 220));
		// }else {
		// convertView.setBackgroundColor(Color.rgb(255, 250, 250));
		// }
		if (lists.size() > 0) {
			final Map<String, String> map = lists.get(position);
			String number = (String) map.get("menu");
			holder.menu.setText(number);
		}
		return convertView;
	}

	static class ViewHolder {
		TextView   menu;    //菜单名称
	}
}
【DataBuiltUtils.java】

import java.util.ArrayList;
import java.util.HashMap;

public class DataBuiltUtils {

	public static ArrayList<HashMap<String,String>> getMainMapList(){
		ArrayList<HashMap<String, String>> tempMapList = new ArrayList<HashMap<String,String>>();
		
		for(int i=0;i<5;i++){
			HashMap<String, String> tempMap = new HashMap<String, String>();
			tempMap.put("menu", "菜单【"+(i+1)+"】");
			tempMapList.add(tempMap);
		}
		return tempMapList;
	}
	
	public static ArrayList<HashMap<String,String>> getFirstMapList(){
		ArrayList<HashMap<String, String>> tempMapList = new ArrayList<HashMap<String,String>>();
		
		for(int i=0;i<5;i++){
			HashMap<String, String> tempMap = new HashMap<String, String>();
			tempMap.put("menu", "FirstFragment菜单【"+(i+1)+"】");
			tempMapList.add(tempMap);
		}
		return tempMapList;
	}
}


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