android 使用DrawerLayout實現側滑菜單

背景：2013年google提出drawerlayout是開發者更方便的開發側滑菜

單，在沒有drawerlayout之前很多開發者都使用github開源組件

slidingmenu,個人覺得drawerlayout更加好用，在這爲大家提供可參考

的個人學習見解

1.初步掌握drawerlayout
2.actionbar和drawerlayout聯動
3.點擊圖標實現菜單的切換

1.drawerlayout是v4包裏面的組件，請查看你的v4包裏面是否存在drawerlayout。class，有的新建工程中並沒有，刪除重新導入有的就行了。
drawerlayout實現規範：

1.
刪除所有控件，讓drawerlayout成爲直接子佈局，然後drawerlayout裏面包含了兩個子佈局，這兩個子佈局裏面的屬性必須要有的屬性有：

    內容佈局:
         android:layout_width="match_parent"
        android:layout_height="match_parent" 

        菜單佈局:
        width最好不大於320dp

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/draw_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" >
    </FrameLayout>

    <ListView
        android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_gravity="start"
        android:layout_height="match_parent"
        android:background="#ffffcc"
        android:divider="@null" >
    </ListView>

</android.support.v4.widget.DrawerLayout>

讓listview適配上數據

R.layout.listview_item_layout爲一個佈局文件，這個文件裏面沒有佈局，只有一個textview
adapter = new ArrayAdapter<String>(getApplicationContext(), R.layout.listview_item_layout, menu_list);
        mListView.setAdapter(adapter);  

滑出菜單，給listview添加點擊事件，點擊的反應就是讓framlayout被fragment填充

mListView.setOnItemClickListener(new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> arg0, View v, int position,long arg3) {
    Toast.makeText(getApplicationContext(), "asdfasdf", 1000).show();
    Fragment fragment = new ContentFragment();
    Bundle bundle = new Bundle();
    bundle.putString("text",menu_list.get(position) );
    fragment.setArguments(bundle);
    FragmentManager manager = getFragmentManager();
    manager.beginTransaction().replace(R.id.content_frame, fragment).commit();
    //點擊之後隱藏菜單
     mDrawerLayout.closeDrawer(mListView);
            }
        });

2.
給drawerlayout設置監聽器

所要用到的類有ActionBarDrawerToggle看起來不像一個監聽器

我們把它當作監聽器來用，裏面有兩個回調方法要用到

onDrawerOpened（）、onDrawerClosed（）；

在裏面實現顯示actionbar裏面的信息與否

示例：

mActionBarDrawerToggle  = new ActionBarDrawerToggle(this, mDrawerLayout, R.drawable.ic_launcher, R.string.drawer_open, R.string.drawer_close){
    @Override
    public void onDrawerOpened(View drawerView) {
    // TODO Auto-generated method stub
    //改變actionbar的title
        getActionBar().setTitle("請選擇");
    //下面這個方法調用之後會去調用onPrepareOptionsMenu()
                invalidateOptionsMenu();
                super.onDrawerOpened(drawerView);
            }
            @Override
            public void onDrawerClosed(View drawerView) {
                // TODO Auto-generated method stub
                getActionBar().setTitle(mtitle);
                invalidateOptionsMenu();
                super.onDrawerClosed(drawerView);
            }
        };
        mDrawerLayout.setDrawerListener(mActionBarDrawerToggle);
//所以重寫onPrepareOptionsMenu
    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
    //判斷是否打開菜單的方法
        boolean check_open = mDrawerLayout.isDrawerOpen(mListView);
    //獲取actionbar上面的元素設置可見性
    menu.findItem(R.id.menu_settings).setVisible(!check_open);
        return super.onPrepareOptionsMenu(menu);
    }

3.
首先設置actiobar的兩條屬性
要用到的方法有onOptionsItemSelected，onPostCreate，syncState
第一個方法就不用多做介紹了，就是監聽圖標的點擊事件，第二個方法和第三個方法實現同步和圖標的偏移效果

    getActionBar().setDisplayHomeAsUpEnabled(true);
    getActionBar().setDisplayShowHomeEnabled(true);

給圖標添加點擊事件

    @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            // TODO Auto-generated method stub
//判斷是否點擊            if(mActionBarDrawerToggle.onOptionsItemSelected(item)){
                return true;
            }
            return super.onOptionsItemSelected(item);
        }

實現同步

    @Override
        protected void onPostCreate(Bundle savedInstanceState) {
            // TODO Auto-generated method stub
        mActionBarDrawerToggle.syncState();
        super.onPostCreate(savedInstanceState);
        }

下面是全部的源碼：

activity_main.xml

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/draw_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" >
    </FrameLayout>

    <ListView
        android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_gravity="start"
        android:layout_height="match_parent"
        android:background="#ffffcc"
        android:divider="@null" >
    </ListView>

</android.support.v4.widget.DrawerLayout>

listview_item_layout.xml

    <TextView  xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/listview_item_layout_textview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="26dp"
        android:paddingTop="14dp"
        android:paddingRight="26dp"
        android:paddingBottom="14dp"
        android:textSize="26sp"
        android:textColor="#000000"
        />

content_fragment_layout.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:id="@+id/content_fragment_layout_textview_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="11111"/>

</LinearLayout>

Strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">DrawerLayoutDemo</string>
    <string name="hello_world">Hello world!</string>
    <string name="menu_settings">Settings</string>
    <string name="drawer_open">Drawer Open!</string>
    <string name="drawer_close">Drawer Close!</string>

</resources>

mainactivity.java

package com.example.drawerlayoutdemo;

import java.util.ArrayList;

import android.annotation.SuppressLint;
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.LayoutInflater;
import android.view.Menu;
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.widget.Toast;

public class MainActivity extends Activity {

    private DrawerLayout mDrawerLayout;
    private ListView mListView;
    private ArrayList<String> menu_list;
    private ArrayAdapter<String> adapter;
    private ActionBarDrawerToggle mActionBarDrawerToggle;
    private String mtitle;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mtitle = (String)getTitle();

        mDrawerLayout =(DrawerLayout) findViewById(R.id.draw_layout);
        mListView = (ListView) findViewById(R.id.left_drawer);
        menu_list = new ArrayList<String>();
        adapter = new ArrayAdapter<String>(getApplicationContext(), R.layout.listview_item_layout, menu_list);
        mListView.setAdapter(adapter);      

        for(int i=0;i<5;i++){
            menu_list.add("列表項"+i);
        }

        mListView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View v, int position,
                    long arg3) {
                Toast.makeText(getApplicationContext(), "asdfasdf", 1000).show();
                Fragment fragment = new ContentFragment();
                Bundle bundle = new Bundle();
                bundle.putString("text",menu_list.get(position) );
                fragment.setArguments(bundle);

                FragmentManager manager = getFragmentManager();
                manager.beginTransaction().replace(R.id.content_frame, fragment).commit();
                    mDrawerLayout.closeDrawer(mListView);
            }
        });
        mActionBarDrawerToggle  = new ActionBarDrawerToggle(this, mDrawerLayout, R.drawable.ic_launcher, R.string.drawer_open, R.string.drawer_close){
            @Override
            public void onDrawerOpened(View drawerView) {
                // TODO Auto-generated method stub
                getActionBar().setTitle("請選擇");
                invalidateOptionsMenu();//call onPrepareOptionsMenu()
                super.onDrawerOpened(drawerView);
            }
            @Override
            public void onDrawerClosed(View drawerView) {
                // TODO Auto-generated method stub
                getActionBar().setTitle(mtitle);
                invalidateOptionsMenu();
                super.onDrawerClosed(drawerView);
            }
        };
        mDrawerLayout.setDrawerListener(mActionBarDrawerToggle);
        getActionBar().setDisplayHomeAsUpEnabled(true);
        getActionBar().setDisplayShowHomeEnabled(true);
    }
    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        boolean check_open = mDrawerLayout.isDrawerOpen(mListView);
        menu.findItem(R.id.menu_settings).setVisible(!check_open);
        return super.onPrepareOptionsMenu(menu);
    }
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // TODO Auto-generated method stub
            getMenuInflater().inflate(R.menu.activity_main, menu);
            return super.onCreateOptionsMenu(menu);
        }
        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            // TODO Auto-generated method stub
            if(mActionBarDrawerToggle.onOptionsItemSelected(item)){
                return true;
            }
            return super.onOptionsItemSelected(item);
        }
        @Override
        protected void onPostCreate(Bundle savedInstanceState) {
            // TODO Auto-generated method stub
        mActionBarDrawerToggle.syncState();
            super.onPostCreate(savedInstanceState);
        }
}

content_fragment.java

package com.example.drawerlayoutdemo;

import android.annotation.SuppressLint;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class ContentFragment extends Fragment {

    private TextView textview;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        View view = inflater.inflate(R.layout.content_fragment_layout, container,false);
        textview = (TextView) view.findViewById(R.id.content_fragment_layout_textview_1);
        String text = getArguments().getString("text");
        textview.setText(text);
        return view;
    }

}