Android仿QQ滑動彈出菜單標記已讀、未讀消息

在上一篇《Android仿微信滑動彈出編輯、刪除菜單效果、增加下拉刷新功能》裡，已經帶著大家學習如何使用SwipeMenuListView這一開源庫實現滑動列表彈出菜單，接下來，將進一步學習，如何為不同的list item呈現不同的菜單，此處我們做一個實例：Android 高仿QQ滑動彈出菜單標記已讀、未讀消息，看下效果圖：

1. 創建項目，並導入SwipeMenuListView類庫

2. 創建消息實體bean：

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

注： 通過isRead字段，我們區分菜單顯示“設為已讀”“設為未讀”；

3. 創建列表顯示的Adapter，重寫其中的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; 
 
/** 
 * my msgs list adapter 
 */ 
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) { 
      // 下拉項布局 
      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) {//未讀 
        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： 此處重寫了父類中的getItemViewType方法，該方法中，我們根據Msg的isRead字段來判斷返回值的是0還是1； 之後，我們將根據該返回值，來判斷list item的菜單是何種類型！

4. 根據ItemViewType，創建滑動菜單：

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; 
 
  // 要刪除的數據 
  private Msg dMsg; 
 
  // 要修改的數據 
  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 = "我欲與君相知，長命無絕衰"; 
    msg1.isRead = false; 
 
    Msg msg2 = new Msg(); 
    msg2.id = 2; 
    msg2.title = "愛在記憶中找你"; 
    msg2.desc = "如果可以恨你，全力痛恨你，連遇上亦要躲避"; 
    msg2.isRead = true; 
 
    msgs.add(msg1); 
    msgs.add(msg2); 
 
    msgAdapter = new MyMsgAdapter(this, msgs); 
    listViewMyMsgs.setAdapter(msgAdapter); 
 
    createMenu(); 
  } 
 
  /** 
   * 刪除某個消息 
   * 
   * @param position 
   */ 
  private void deleteMsg(int position) { 
    // DoDeleteMsgRequest(String id,Handler mHandler, int reqCode) 
    dMsg = msgs.get(position); 
    if (dMsg != null) { 
      Toast.makeText(MainActivity.this, "刪除 ： " + dMsg, Toast.LENGTH_SHORT).show(); 
 
      msgs.remove(dMsg); 
      msgAdapter.notifyDataSetChanged(); 
    } 
  } 
 
  /** 
   * 標記已讀和未讀 
   * 
   * @param position 
   */ 
  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:// 未讀 
            createMenu1(menu); 
            break; 
          case 1:// 已讀 
            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("標為已讀"); 
        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("刪除"); 
        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("標記未讀"); 
        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("刪除"); 
        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("刪除 :" + position); 
            deleteMsg(position); 
            break; 
          case 1: 
            LogUtils.e("標記未讀 :" + position); 
            readMsg(position); 
            break; 
          case 2: 
            LogUtils.e("標為已讀 :" + 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) { // 如果是未讀，需要標記為已讀 
        readMsg(position); 
      } 
    } 
  } 
 
  private int dp2px(int dp) { 
    return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, 
        getResources().getDisplayMetrics()); 
  } 
} 

注：著重看下SwipeMenuCreator接口中的public void create(SwipeMenu menu)方法，通過menu.getViewType()方法，我們可以得到該list item的viewType，而這個viewType，使我們剛剛在Adapter自己定義的，所以此時，只需要判斷自己所定義的viewType值，並根據viewType來創建菜單即可！

如此這般，便可實現類似QQ滑動彈出菜單標記已讀、未讀消息功能啦，希望大家喜歡。