Expandable ListView中不同组的不同布局不同的布局

Question

我需要在我的应用程序中使用可扩展列表视图，其中每个组都有不同的表格布局。我想为表中的每一行设置onClick Listener。

如何在不同的可扩展列表视图中设置不同的布局？

或者是有可能通过动态地添加行（扩大），并删除他们 （隐藏）做扩展列表视图的相同功能与 表布局。

Answer 1

您可以根据例如BaseExpandableListAdapter创建您自己的ExpandableListAdapter。接下来，您应该重写getChildView方法，以便期望的孩子将拥有所需的布局。这里有一个简单的例子：

public class MyExpandableListAdapter extends BaseExpandableListAdapter { 
public ArrayList<String> groupItem; 
public ArrayList<Object> childItem; 
public LayoutInflater minflater; 

public MyExpandableListAdapter(ArrayList<String> grList, 
      ArrayList<Object> childItem, Context context) { 
     groupItem = grList; 
     this.childItem = childItem; 
     this.context = context; 
     minflater = (LayoutInflater) context 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

@Override 
    public View getChildView(int groupPosition, final int childPosition, 
      boolean isLastChild, View convertView, ViewGroup parent) { 

     if (convertView == null) { 
      if (groupItem.get(groupPosition).equals("desired_group_name")) { 
       convertView = minflater.inflate(R.layout.desired_layout, null); 
      } else { 
       convertView = minflater.inflate(R.layout.other_layout, null); 
      } 
     } 
} 
} 

如果这个答案是不清楚，我可以为您提供全类，但它的实例很容易找到在网络上。

这是我的项目中的全班同学。我知道convertView应该是可重用的，但是当列表被折叠然后重新打开时，我认为Views的顺序有问题。我只有几个元素，所以从性能角度来看这不是问题。

package pl.psnc.iip.hne.android.hneclient.adapter; 
import java.util.ArrayList; 
import pl.psnc.iip.hne.android.hneclient.R; 
import pl.psnc.iip.hne.android.hneclient.json.Device; 
import pl.psnc.iip.hne.android.hneclient.json.Devices; 
import pl.psnc.iip.hne.android.hneclient.listeners.ImageViewRegisteredListener; 
import pl.psnc.iip.hne.android.hneclient.utility.ConnectionUtils; 
import android.app.Activity; 
import android.content.Context; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseExpandableListAdapter; 
import android.widget.CheckedTextView; 
import android.widget.ImageView; 
import android.widget.TextView; 

public class DeviceExpandableListAdapter extends BaseExpandableListAdapter { 

public ArrayList<String> groupItem; 
public ArrayList<Device> tempChild; 
public ArrayList<Object> childItem; 
public LayoutInflater minflater; 

ArrayList<ImageViewRegisteredListener> ivrListeners = null; 
public Activity activity; 
public Context context; 
int idIterator; 

public void addImageViewRegisteredListener(
    ImageViewRegisteredListener listener) { 
if (!ivrListeners.contains(listener)) { 
    ivrListeners.add(listener); 
} 
} 

public void removeImageViewRegisteredListener(
    ImageViewRegisteredListener listener) { 
if (ivrListeners.contains(listener)) { 
    ivrListeners.remove(listener); 
} 
} 

public DeviceExpandableListAdapter(ArrayList<String> grList, 
    ArrayList<Object> childItem, Context context) { 
groupItem = grList; 
idIterator = 0; 
ivrListeners = new ArrayList<ImageViewRegisteredListener>(); 
this.childItem = childItem; 
this.context = context; 

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

} 

public void setInflater(LayoutInflater mInflater, Activity act) { 
this.minflater = mInflater; 
activity = act; 
} 

public int findAppropriateImageForDevice(String type) { 
int id = -1; 
if (type.equals(Devices.PLOGG)) { 
    id = R.drawable.plogg; 
} else if (type.equals(Devices.RFID)) { 
    id = R.drawable.rfid; 
} else if (type.equals(Devices.BARRIER)) { 
    // id = -1; 
} else if (type.equals(Devices.TEMPLIGHT)) { 
    // id = -1; 
} 
return id; 
} 

@Override 
public Object getChild(int groupPosition, int childPosition) { 
return (Device) ((ArrayList<Device>) childItem.get(groupPosition)) 
    .get(childPosition); 
} 

@Override 
public long getChildId(int groupPosition, int childPosition) { 
return 0; 
} 

@Override 
public View getChildView(int groupPosition, final int childPosition, 
    boolean isLastChild, View convertView, ViewGroup parent) { 
tempChild = (ArrayList<Device>) childItem.get(groupPosition); 
Device device = tempChild.get(childPosition); 
Log.i(this.getClass().getName(), device.getIp()); 
if (groupItem.get(groupPosition).equals(Devices.PLOGG)) { 
    int newId = -1; 
    Integer oldId = ConnectionUtils.getInstance().getPowerIndicatorHT() 
     .get(device.getIp()); 
    if (oldId != null) { 
    newId = oldId; 
    } else { 
    ++idIterator; 
    newId = idIterator; 
    ConnectionUtils.getInstance().getPowerIndicatorHT() 
     .put(device.getIp(), newId); 
    } 
    convertView = minflater.inflate(R.layout.plogg_item, null); 
    ImageView powerIndicator = (ImageView) convertView 
     .findViewById(R.id.powerIndicator); 

    powerIndicator.setId(newId); 

    Integer foundId = ConnectionUtils.getInstance() 
     .getPowerIndicatorHT().get(device.getIp()); 
    if (foundId != null) { 
    for (ImageViewRegisteredListener listener : ivrListeners) { 
     listener.imageViewRegistered(convertView, foundId, 
      device.getIp()); 
    } 
    } 

    Log.i(DeviceExpandableListAdapter.class.getName(), "newId: " 
     + newId); 

} else { 
    convertView = minflater.inflate(R.layout.device_item, null); 
} 
TextView textTop = null; 
textTop = (TextView) convertView.findViewById(R.id.toptext); 
TextView textBottom = null; 
textBottom = (TextView) convertView.findViewById(R.id.bottomtext); 

textTop.setText(device.getIp()); 
textBottom.setText(device.getDescription()); 

int id = findAppropriateImageForDevice(device.getType()); 
ImageView image = (ImageView) convertView.findViewById(R.id.icon); 
if (id != -1) { 
    image.setImageResource(id); 
} else { 
    image.setImageResource(R.drawable.ic_launcher); 
} 

return convertView; 
} 

@Override 
public int getChildrenCount(int groupPosition) { 
return ((ArrayList<String>) childItem.get(groupPosition)).size(); 
} 

@Override 
public Object getGroup(int groupPosition) { 
return null; 
} 

@Override 
public int getGroupCount() { 
return groupItem.size(); 
} 

@Override 
public void onGroupCollapsed(int groupPosition) { 
super.onGroupCollapsed(groupPosition); 
} 

@Override 
public void onGroupExpanded(int groupPosition) { 
super.onGroupExpanded(groupPosition); 
} 

@Override 
public long getGroupId(int groupPosition) { 
return 0; 
} 

@Override 
public View getGroupView(int groupPosition, boolean isExpanded, 
    View convertView, ViewGroup parent) { 
if (convertView == null) { 
    convertView = minflater.inflate(R.layout.group_row, null); 
} 
CheckedTextView ctv = (CheckedTextView) convertView 
    .findViewById(R.id.textView1); 
ctv.setText(groupItem.get(groupPosition)); 
ctv.setChecked(isExpanded); 
return convertView; 
} 

@Override 
public boolean hasStableIds() { 
return false; 
} 

@Override 
public boolean isChildSelectable(int groupPosition, int childPosition) { 
return true; 
} 

} 

下面是它的实际样子：