Android 抽屜效果的導覽功能表實現

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抽屜效果的導覽功能表

  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體按鈕,直接在介面上一個按鈕點擊,菜單就滑出來,而且感覺能放很多東西。

 

  關於實現,搜尋了一下,有如下兩種:

  1.用SlidingDrawer:

  http://developer.android.com/reference/android/widget/SlidingDrawer.html

  但是不知道為什麼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在這裡:

  http://developer.android.com/training/implementing-navigation/nav-drawer.html

  庫的引用

   首先, DrawerLayout這個類是在Support Library裡的,需要加上android-support-v4.jar這個包。

  然後程式中用時在前面匯入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,然後在Android SDK\extras\android\support\v4路徑下找到android-support-v4.jar,複製到項目的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的第一個子項目是主要內容,即抽屜沒有開啟時顯示的布局。這裡採用了一個FrameLayout,裡面什麼也沒放。

  DrawerLayout的第二個子項目是抽屜中的內容,即抽屜布局,這裡採用了一個ListView。

 

 

  主要的Activity(從官方執行個體中扒出來的):

 

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官網樣本處提供下載了。

  程式運行後效果如下:


  抽屜開啟前:

  抽屜開啟後:

 

 

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,其實不用上面那麼麻煩,隨便自己定義一個按鈕控制抽屜的開啟就行:

  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,將抽屜開啟 mDrawerLayout.openDrawer(Gravity.LEFT);            }        });    }}

 

 

參考資料

  官方教程:

  http://developer.android.com/design/patterns/navigation-drawer.html

  http://developer.android.com/training/implementing-navigation/nav-drawer.html

  其他參考資料:

  http://blog.chengyunfeng.com/?p=493

  http://my.eoe.cn/appadventure/archive/3826.html

Android 抽屜效果的導覽功能表實現

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