带有标题/部分的导航抽屉

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【中文标题】带有标题/部分的导航抽屉【英文标题】:Navigation Drawer with Headers/Sections 【发布时间】:2013-06-14 18:10:27 【问题描述】:

我想知道是否有任何方法可以将标题/部分添加到导航抽屉。我设法添加了类似的东西,但它只显示在列表的顶部,因为 addHeaderView 需要在 setAdapter 之前调用,如果我尝试在 setAdapter 之后添加更多元素,它们将重写第一个元素。

谢谢。

编辑:

public class MenuListAdapter extends BaseAdapter 

// Declare Variables
Context context;
String[] mTitle;
String[] mSubTitle;
int[] mIcon;
LayoutInflater inflater;

public MenuListAdapter(Context context, String[] title, String[] subtitle,
        int[] icon) 
    this.context = context;
    this.mTitle = title;
    this.mSubTitle = subtitle;
    this.mIcon = icon;

    inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);


@Override
public int getViewTypeCount() 
    return super.getViewTypeCount();


@Override
public int getItemViewType(int position) 
    return super.getItemViewType(position);


@Override
public int getCount() 
    return mTitle.length;


@Override
public Object getItem(int position) 
    return mTitle[position];


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


public View getView(int position, View convertView, ViewGroup parent) 
    // Declare Variables
    TextView txtTitle;
    TextView txtSubTitle;
    ImageView imgIcon;

    View itemView = inflater.inflate(R.layout.drawer_list_item, parent,
            false);

    // Locate the TextViews in drawer_list_item.xml
    txtTitle = (TextView) itemView.findViewById(R.id.title);
    txtSubTitle = (TextView) itemView.findViewById(R.id.subtitle);

    // Locate the ImageView in drawer_list_item.xml
    imgIcon = (ImageView) itemView.findViewById(R.id.icon);

    // Set the results into TextViews
    txtTitle.setText(mTitle[position]);
    txtSubTitle.setText(mSubTitle[position]);

    // Set the results into ImageView
    imgIcon.setImageResource(mIcon[position]);

    return itemView;

编辑:

我通过结合不同来源的解决方案找到了一个很好的解决方案,这是我使用的主要类:

EntryAdapter

import java.util.ArrayList;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import com.androidbegin.sidemenututorial.R;

public class EntryAdapter extends ArrayAdapter<Item> 

    private enum RowType 
        LIST_ITEM, HEADER_ITEM
    

    private Context context;
    private ArrayList<Item> items;
    private LayoutInflater vi;

    public EntryAdapter(Context context, ArrayList<Item> items) 
        super(context,0, items);
        this.context = context;
        this.items = items;
        vi = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    

    @Override
    public int getViewTypeCount()   //Returns the number of types of Views that will be created by getView(int, View, ViewGroup).
        return RowType.values().length;
    

    @Override
    public int getItemViewType(int position)  //framework calls getItemViewType for row n, the row it is about to display.
        //Get the type of View that will be created by getView(int, View, ViewGroup) for the specified item.
        Log.i("LIST", "item at " + position + " is " 
                + ((getItem(position).isSection() ? 0 : 1) == 0 ? "section" : "normal item"));
        return getItem(position).isSection() ? 0 : 1; // get position passes (n) and accertain  is its a header  or not
    

    @Override
    public boolean isEnabled(int position) 
        return !getItem(position).isSection();
    

    @Override
    public View getView(int position, View convertView, ViewGroup parent) 
        View v = convertView;

        final Item i = items.get(position);
        if (i != null) 
            if(i.isSection())
                SectionItem si = (SectionItem) i;
                v = vi.inflate(R.layout.list_item_section, null);

                v.setOnClickListener(null);
                v.setOnLongClickListener(null);
                v.setLongClickable(false);

                final TextView sectionView = (TextView) v.findViewById(R.id.list_item_section_text);
                sectionView.setText(si.getTitle());
            else
                EntryItem ei = (EntryItem) i;
                v = vi.inflate(R.layout.list_item_entry, null);
                final TextView title = (TextView)v.findViewById(R.id.list_item_entry_title);
                final TextView subtitle = (TextView)v.findViewById(R.id.list_item_entry_summary);

                if (title != null) 
                    title.setText(ei.title);
                if(subtitle != null)
                    subtitle.setText(ei.subtitle);
            
        
        return v;
    


EntryItem

public class EntryItem implements Item

    public final String title;
    public final String subtitle;

    public EntryItem(String title, String subtitle) 
        this.title = title;
        this.subtitle = subtitle;
    

    @Override
    public boolean isSection() 
        return false;
    


物品

public interface Item 

    public boolean isSection();


SectionItem

public class SectionItem implements Item

    private final String title;

    public SectionItem(String title) 
        this.title = title;
    

    public String getTitle()
        return title;
    

    @Override
    public boolean isSection() 
        return true;
    


MainActivity

import java.util.ArrayList;

import android.content.Context;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;

import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;
import com.androidbegin.item.EntryAdapter;
import com.androidbegin.item.EntryItem;
import com.androidbegin.item.Item;
import com.androidbegin.item.SectionItem;

public class MainActivity extends SherlockFragmentActivity 

    // Declare Variable
    DrawerLayout mDrawerLayout;
    ListView mDrawerList;
    ActionBarDrawerToggle mDrawerToggle;
    MenuListAdapter mMenuAdapter;
    String[] title;
    String[] subtitle;
    int[] icon;
    Fragment fragment1 = new Fragment1();
    Fragment fragment2 = new Fragment2();
    Fragment fragment3 = new Fragment3();
    Context context;

    ArrayList<Item> items = new ArrayList<Item>();

    @Override
    public void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.drawer_main);
        this.context = this;
        // Generate title
        title = new String[]  "Title Fragment 1", "Title Fragment 2",
                "Title Fragment 3" ;

        // Generate subtitle
        subtitle = new String[]  "Subtitle Fragment 1", "Subtitle Fragment 2",
                "Subtitle Fragment 3" ;

        // Generate icon
        icon = new int[]  R.drawable.action_about, R.drawable.action_settings,
                R.drawable.collections_cloud ;

        // Locate DrawerLayout in drawer_main.xml
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

        // Locate ListView in drawer_main.xml
        mDrawerList = (ListView) findViewById(R.id.left_drawer);

        // Set a custom shadow that overlays the main content when the drawer
        // opens
        mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
                GravityCompat.START);

        // Pass results to MenuListAdapter Class
//      mMenuAdapter = new MenuListAdapter(this, title, subtitle, icon);

        // Set the MenuListAdapter to the ListView
//      mDrawerList.setAdapter(mMenuAdapter);

        items.add(new SectionItem("Category 1"));
        items.add(new EntryItem("Item 1", "This is item 1.1"));
        items.add(new EntryItem("Item 2", "This is item 1.2"));
        items.add(new EntryItem("Item 3", "This is item 1.3"));


        items.add(new SectionItem("Category 2"));
        items.add(new EntryItem("Item 4", "This is item 2.1"));
        items.add(new EntryItem("Item 5", "This is item 2.2"));
        items.add(new EntryItem("Item 6", "This is item 2.3"));
        items.add(new EntryItem("Item 7", "This is item 2.4"));

        items.add(new SectionItem("Category 3"));
        items.add(new EntryItem("Item 8", "This is item 3.1"));
        items.add(new EntryItem("Item 9", "This is item 3.2"));
        items.add(new EntryItem("Item 10", "This is item 3.3"));
        items.add(new EntryItem("Item 11", "This is item 3.4"));
        items.add(new EntryItem("Item 12", "This is item 3.5"));

        EntryAdapter adapter = new EntryAdapter(this, items);

        mDrawerList.setAdapter(adapter);

        // Capture button clicks on side menu
        mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

        // Enable ActionBar app icon to behave as action to toggle nav drawer
        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        // ActionBarDrawerToggle ties together the the proper interactions
        // between the sliding drawer and the action bar app icon
        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
                R.drawable.ic_drawer, R.string.drawer_open,
                R.string.drawer_close) 

            public void onDrawerClosed(View view) 
                // TODO Auto-generated method stub
                super.onDrawerClosed(view);
            

            public void onDrawerOpened(View drawerView) 
                // TODO Auto-generated method stub
                super.onDrawerOpened(drawerView);
            
        ;

        mDrawerLayout.setDrawerListener(mDrawerToggle);

        if (savedInstanceState == null) 
            selectItem(0);
        
    

    @Override
    public boolean onCreateOptionsMenu(Menu menu) 
        getSupportMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    

    @Override
    public boolean onOptionsItemSelected(MenuItem item) 

        if (item.getItemId() == android.R.id.home) 

            if (mDrawerLayout.isDrawerOpen(mDrawerList)) 
                mDrawerLayout.closeDrawer(mDrawerList);
             else 
                mDrawerLayout.openDrawer(mDrawerList);
            
        

        return super.onOptionsItemSelected(item);
    

    // The click listener for ListView in the navigation drawer
    private class DrawerItemClickListener implements
            ListView.OnItemClickListener 
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id) 
            Log.i("LIST", "item position = " + Integer.toString(position)
                    + "\nitem id = " + String.valueOf(id));
            if (!items.get(position).isSection()) 
                EntryItem item = (EntryItem)items.get(position);

                Toast.makeText(context, "You clicked " + item.title , Toast.LENGTH_SHORT).show();

                selectItem(position);
            
//          selectItem(position);
        
    

    private void selectItem(int position) 

        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        // Locate Position
        switch (position) 
            case 0:
                ft.replace(R.id.content_frame, fragment1);
                break;
            case 1:
                ft.replace(R.id.content_frame, fragment2);
                break;
            case 2:
                ft.replace(R.id.content_frame, fragment3);
                break;
        
        ft.commit();
        mDrawerList.setItemChecked(position, true);
        // Close drawer
        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);
        // Pass any configuration change to the drawer toggles
        mDrawerToggle.onConfigurationChanged(newConfig);
    

但是我有一个小问题:这些部分在列表中占据了一个位置,并且片段的选择混乱了。

【问题讨论】:

【参考方案1】:

您将标题/部分添加到 ListView 以在 DrawerLayout 中使用,就像您将标题/部分添加到 ListView 以在 Android 内部的任何其他位置使用一样。

在底层,这涉及到一个ListAdapter

覆盖 getViewTypeCount() 以指示有多少不同类型的行(例如,2 种,一种用于标题,一种用于常规行)

覆盖getItemViewType() 以指示对给定position 使用哪种行类型

确保getView()(或newView()/bindView()CursorAdapter)知道多种行类型并相应地处理它们

在更高级别上,您可以尝试使用 my MergeAdapter 或各种其他第三方库之类的东西来帮助简化此操作。

【讨论】:

谢谢你,我会试试你的库,虽然它似乎需要做很多工作,因为它应该是默认的。如果您知道如何实现这一点的其他教程,我将不胜感激。 @IonutNegru:在你最喜欢的搜索引擎中对android listview section headers 进行简单搜索会出现很多页面,包括库(如code.google.com/p/android-amazing-listview)、*** 问题(如***.com/questions/7943802/…)、教程/recipes(例如androidcookbook.com/Recipe.seam?recipeId=992)等等。【参考方案2】:

在导航抽屉中,项目列表可以使用 ListView 显示,因此您可以拥有一个类适配器并实现您的逻辑。 因此,您可以添加部分、标题等。

【讨论】:

我怎样才能做到这一点?我已经有一个填充列表的 BaseAdapter(因为我为列表添加了图像和字幕)?我在主帖中添加了适配器。 只需实现一个自定义适配器,重写getView等方法即可。 如您所见,我已经这样做了,但是您建议如何将标题添加到导航抽屉的列表中?【参考方案3】:

这里有一个使用标题/部分的导航抽屉complete example

这是结果

【讨论】:

【参考方案4】:

如果您的列表项是固定的(不变的),那么快速的“破解”方法是在适配器的 getView() 方法中包含一个用于“位置”的开关盒,并在这些固定位置填充 headerlayout.xml。您的常规通货膨胀将进入开关盒的默认部分。它很脏,不推荐,但很有效。

【讨论】:

我想避免这种黑客攻击,因为将来很难修改(如果需要的话)。不过谢谢你的提示。【参考方案5】:

我建议通过添加一个标签成员来扩展EntryItem,告诉您要创建哪种类型的片段。然后只需检查 onItemClick 处理程序中的标签以创建正确类型的片段。这样您就不会依赖于位置,位置会随着您在部分中添加/删除项目而改变。

【讨论】:

【参考方案6】:

您需要将此添加到 EntryAdapter 类中:

@Override
public boolean areAllItemsEnabled () 
    return false;

这样,并且:

@Override
public boolean isEnabled(int position) 
    return !getItem(position).isSection();

部分不应在 ListView 上占据位置。

【讨论】:

【参考方案7】:

我读到的一个很好的解决方案是在行布局文件中放置一个标题 TextView 并将其可见性设置为GONE

然后在您的适配器的getView 中,有一些逻辑说:这是列表中的第一项(位置 0),还是该项目的类型与它上面的类型一个位置不同?如果是这样,请将标题 TextView's 可见性转为 VISIBLE

这种方式是首选,因为当您想使用getItemAtPosition 时,您不必弄清楚如何躲避您的部分标题,因为如果您以 OP 和其他方式实现它们,它们将占据整个位置建议。

【讨论】:

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