Android仿QQ滑动弹出菜单标记已读、未读消息

在上一篇《Android仿微信滑动弹出编辑、删除菜单效果、增加下拉刷新功能》里，已经带着大家学习如何使用SwipeMenuListView这一开源库实现滑动列表弹出菜单，接下来，将进一步学习，如何为不同的list item呈现不同的菜单，此处我们做一个实例：Android 高仿QQ滑动弹出菜单标记已读、未读消息，看下效果图：

1. 创建项目，并导入SwipeMenuListView类库

2. 创建消息实体bean：

public class Msg { 
  public int id; 
  public String title; 
  public String desc; 
  // false是未读；true是已读 
  public boolean isRead; 
  @Override 
  public String toString() { 
    return "Msg{" + 
        "id=" + id + 
        ", title='" + title + '\'' + 
        ", desc='" + desc + '\'' + 
        ", isRead=" + isRead + 
        '}'; 
  } 
} 

注： 通过isRead字段，我们区分菜单显示“设为已读”“设为未读”；

3. 创建列表显示的Adapter，重写其中的getItemViewType方法：

import android.app.Activity; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.ImageView; 
import android.widget.TextView; 
import java.util.List; 
 
public class MyMsgAdapter extends BaseAdapter { 
  private Activity mContext; 
  private LayoutInflater mInflater; 
  private List<Msg> mDatas; 
  public MyMsgAdapter(Activity context, List<Msg> datas) { 
    mContext = context; 
    mInflater = LayoutInflater.from(mContext); 
    mDatas = datas; 
  } 
  @Override 
  public int getCount() { 
    return (mDatas != null ? mDatas.size() : 0); 
  } 
  @Override 
  public Object getItem(int position) { 
    return (mDatas != null ? mDatas.get(position) : null); 
  } 
  @Override 
  public long getItemId(int position) { 
    return position; 
  } 
  @Override 
  public int getViewTypeCount() { 
    return 2; 
  } 
  @Override 
  public int getItemViewType(int position) { 
    Msg myMsg = mDatas.get(position); 
    boolean isRead = myMsg.isRead; 
    if (isRead) { 
      return 0; 
    } else { 
      return 1; 
    } 
  } 
  @Override 
  public View getView(final int position, View convertView, ViewGroup parent) { 
    ViewHolder holder = null; 
    if (convertView == null) { 
      // 下拉项布局 
      convertView = mInflater.inflate(R.layout.list_item_my_msg, null); 
      holder = new ViewHolder(); 
      holder.img_msg = (ImageView) convertView.findViewById(R.id.img_msg); 
      holder.text_msg_user_name = (TextView) convertView.findViewById(R.id.text_msg_user_name); 
      holder.text_msg_infos = (TextView) convertView.findViewById(R.id.text_msg_infos); 
      convertView.setTag(holder); 
    } else { 
      holder = (ViewHolder) convertView.getTag(); 
    } 
    final Msg myMsg = mDatas.get(position); 
    if (myMsg != null) { 
      if (myMsg.isRead) {//未读 
        holder.img_msg.setImageResource(R.mipmap.readed_msg_img); 
      } else { 
        holder.img_msg.setImageResource(R.mipmap.unread_msg_img); 
      } 
      holder.text_msg_user_name.setText(myMsg.title); 
      holder.text_msg_infos.setText(myMsg.desc); 
    } 
    return convertView; 
  } 
  class ViewHolder { 
    ImageView img_msg; 
    TextView text_msg_user_name; 
    TextView text_msg_infos; 
  } 
} 

注： 此处重写了父类中的getItemViewType方法，该方法中，我们根据Msg的isRead字段来判断返回值的是0还是1； 之后，我们将根据该返回值，来判断list item的菜单是何种类型！

4. 根据ItemViewType，创建滑动菜单：

import android.graphics.Color; 
import android.graphics.drawable.ColorDrawable; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.util.TypedValue; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.Toast; 
import com.apkfuns.logutils.LogUtils; 
import com.baoyz.swipemenulistview.SwipeMenu; 
import com.baoyz.swipemenulistview.SwipeMenuCreator; 
import com.baoyz.swipemenulistview.SwipeMenuItem; 
import com.baoyz.swipemenulistview.SwipeMenuListView; 
import java.util.ArrayList; 
import java.util.List; 
import butterknife.Bind; 
import butterknife.ButterKnife; 
import butterknife.OnItemClick; 
public class MainActivity extends AppCompatActivity { 
  // 方案列表 
  @Bind(R.id.listViewMyMsgs) 
  public SwipeMenuListView listViewMyMsgs; 
  private MyMsgAdapter msgAdapter; 
  // 消息集合 
  private List<Msg> msgs; 
  // 要删除的数据 
  private Msg dMsg; 
  // 要修改的数据 
  private int oPos; 
  private Msg oMyMsg; 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    ButterKnife.bind(this); 
    msgs = new ArrayList<Msg>(); 
    Msg msg1 = new Msg(); 
    msg1.id = 1; 
    msg1.title = "上邪"; 
    msg1.desc = "我欲与君相知，长命无绝衰"; 
    msg1.isRead = false; 
    Msg msg2 = new Msg(); 
    msg2.id = 2; 
    msg2.title = "爱在记忆中找你"; 
    msg2.desc = "如果可以恨你，全力痛恨你，连遇上亦要躲避"; 
    msg2.isRead = true; 
    msgs.add(msg1); 
    msgs.add(msg2); 
    msgAdapter = new MyMsgAdapter(this, msgs); 
    listViewMyMsgs.setAdapter(msgAdapter); 
    createMenu(); 
  } 
   
  private void deleteMsg(int position) { 
    // DoDeleteMsgRequest(String id,Handler mHandler, int reqCode) 
    dMsg = msgs.get(position); 
    if (dMsg != null) { 
      Toast.makeText(MainActivity.this, "删除 ： " + dMsg, Toast.LENGTH_SHORT).show(); 
      msgs.remove(dMsg); 
      msgAdapter.notifyDataSetChanged(); 
    } 
  } 
   
  private void readMsg(int position) { 
    //DoReadMsgRequest(String id, String isRead, Handler mHandler, int reqCode) 
    oPos = position; 
    oMyMsg = msgs.get(position); 
    if (oMyMsg != null) { 
      msgs.get(position).isRead = !msgs.get(position).isRead; 
      msgAdapter.notifyDataSetChanged(); 
    } 
  } 
  private void createMenu() { 
    // step 1. create a MenuCreator 
    SwipeMenuCreator creator = new SwipeMenuCreator() { 
      @Override 
      public void create(SwipeMenu menu) { 
        switch (menu.getViewType()) { 
          case 0:// 未读 
            createMenu1(menu); 
            break; 
          case 1:// 已读 
            createMenu2(menu); 
            break; 
        } 
      } 
      private void createMenu1(SwipeMenu menu) { 
        SwipeMenuItem unreadItem = new SwipeMenuItem( 
            getApplicationContext()); 
        unreadItem.setId(1); 
        unreadItem.setBackground(new ColorDrawable(Color.parseColor("#555555"))); 
        unreadItem.setWidth(dp2px(90)); 
        unreadItem.setTitle("标为已读"); 
        unreadItem.setTitleSize(16); 
        unreadItem.setTitleColor(Color.parseColor("#FFFFFF")); 
        menu.addMenuItem(unreadItem); 
        SwipeMenuItem deleteItem = new SwipeMenuItem( 
            getApplicationContext()); 
        deleteItem.setId(0); 
        deleteItem.setBackground(new ColorDrawable(Color.parseColor("#EF4B3A"))); 
        deleteItem.setWidth(dp2px(90)); 
        deleteItem.setTitle("删除"); 
        deleteItem.setTitleSize(16); 
        deleteItem.setTitleColor(Color.parseColor("#FFFFFF")); 
        menu.addMenuItem(deleteItem); 
      } 
      private void createMenu2(SwipeMenu menu) { 
        SwipeMenuItem readedItem = new SwipeMenuItem( 
            getApplicationContext()); 
        readedItem.setId(2); 
        readedItem.setBackground(new ColorDrawable(Color.parseColor("#555555"))); 
        readedItem.setWidth(dp2px(90)); 
        readedItem.setTitle("标记未读"); 
        readedItem.setTitleSize(16); 
        readedItem.setTitleColor(Color.parseColor("#FFFFFF")); 
        menu.addMenuItem(readedItem); 
        SwipeMenuItem deleteItem = new SwipeMenuItem( 
            getApplicationContext()); 
        deleteItem.setId(0); 
        deleteItem.setBackground(new ColorDrawable(Color.parseColor("#EF4B3A"))); 
        deleteItem.setWidth(dp2px(90)); 
        deleteItem.setTitle("删除"); 
        deleteItem.setTitleSize(16); 
        deleteItem.setTitleColor(Color.parseColor("#FFFFFF")); 
        menu.addMenuItem(deleteItem); 
      } 
    }; 
    // set creator 
    listViewMyMsgs.setMenuCreator(creator); 
    // step 2. listener item click event 
    listViewMyMsgs.setOnMenuItemClickListener(new SwipeMenuListView.OnMenuItemClickListener() { 
      @Override 
      public boolean onMenuItemClick(int position, SwipeMenu menu, int index) { 
        SwipeMenuItem menuItem = menu.getMenuItem(index); 
        int id = menuItem.getId(); 
        switch (id) { 
          case 0: 
            LogUtils.e("删除 :" + position); 
            deleteMsg(position); 
            break; 
          case 1: 
            LogUtils.e("标记未读 :" + position); 
            readMsg(position); 
            break; 
          case 2: 
            LogUtils.e("标为已读 :" + position); 
            readMsg(position); 
            break; 
        } 
        return false; 
      } 
    }); 
  } 
  @OnItemClick(R.id.listViewMyMsgs) 
  public void onItemClick(AdapterView<?> parent, View view, int position, 
              long id) { 
    Msg myMsg = (Msg) parent.getAdapter().getItem( 
        position); 
    if (myMsg != null) { 
      if (myMsg.isRead) { // 如果是未读，需要标记为已读 
        readMsg(position); 
      } 
    } 
  } 
  private int dp2px(int dp) { 
    return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, 
        getResources().getDisplayMetrics()); 
  } 
} 

注：着重看下SwipeMenuCreator接口中的public void create(SwipeMenu menu)方法，通过menu.getViewType()方法，我们可以得到该list item的viewType，而这个viewType，使我们刚刚在Adapter自己定义的，所以此时，只需要判断自己所定义的viewType值，并根据viewType来创建菜单即可！

如此这般，便可实现类似QQ滑动弹出菜单标记已读、未读消息功能啦，希望大家喜欢。

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