Ajouter du texteAfficher sur la listeVoir l'élément

Question

Je dois ajouter des éléments ListView qui peuvent contenir un nombre différent d'objets TextView et ImageView. Comment puis-je le faire? Et comment déterminer et configurer les identifiants de ces objets? Lorsque je tente d'ajouter un ImageView ou TextView à LinearLayout avec id R.id.chat_message, l'application se bloque :(

package com.me.my_app; 

import java.util.ArrayList; 


import android.app.ListActivity; 
import android.content.Context; 
import android.graphics.BitmapFactory; 

import android.os.Bundle; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.view.ViewGroup.LayoutParams; 
import android.widget.BaseAdapter; 
import android.widget.ImageView; 

import android.widget.LinearLayout; 
import android.widget.ListView; 
import android.widget.TextView; 
import android.widget.Toast; 

public class FriendSendMessageActivity extends ListActivity { 

    ListView view; 
    public ContactAdapter contactAdapter; 

    LinearLayout LL; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.chat_send_message); 

     Bundle extras = getIntent().getExtras(); 
     if(extras != null) 
     { 
      int index = Integer.parseInt(extras.get(getPackageName() + ".IndexInList").toString()); 
      String sentFrom = extras.get(getPackageName() + ".SentFrom").toString(); 
      int id = Integer.parseInt(extras.get(getPackageName() + ".Id").toString()); //либо id друга либо id друга 
      FriendItem.Friend item = TabFriendsActivity.getList().get(index); 

      view = getListView(); 

      contactAdapter = new ContactAdapter(); 
      contactAdapter.addItem(new MessageItem.Message(1, true, true, true, "123","13:31",new ArrayList<MessageItem.Message.Attachment>())); 

      ArrayList<MessageItem.Message.Attachment> list = new ArrayList<MessageItem.Message.Attachment>(); 
      list.add(new MessageItem.Message.Attachment(MessageAttachmentType.PHOTO, RoundedImage.createRoundedPhoto(BitmapFactory.decodeResource(MainActivity.res,R.drawable.temp_user_photo)))); 

      contactAdapter.addItem(new MessageItem.Message(1, true, true, true, "123","9:10",list)); 
      view.setAdapter(contactAdapter); 
     } 
    } 





    class ContactAdapter extends BaseAdapter { 

     private ArrayList<MessageItem.Message> mData = new ArrayList<MessageItem.Message>(); 
     private LayoutInflater mInflater; 

     private static final int IGNORE_ITEM_VIEW_TYPE = -1; 
     private static final int TYPE_ITEM = 0; //обычный item 
     private static final int TYPE_MAX_COUNT = 2; //макс. число layout'ов отображения item'ов 


     public ContactAdapter() 
     { 
      mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     } 


     public void addItem(final MessageItem.Message item) { 
      mData.add(item); 
      notifyDataSetChanged(); 
     } 


     public int getItemViewType(int position) 
     { 
      return TYPE_ITEM; 
     } 

     @Override 
     public int getViewTypeCount() { 
      return TYPE_MAX_COUNT; 
     } 

     public int getCount() 
     { 
      return mData.size(); 
     } 


     public MessageItem.Message getItem(int position) 
     { 
      return mData.get(position); 
     } 


     public long getItemId(int position) 
     { 
      return position; 
     } 

     public boolean isEnabled(int pos) 
     { 
      return true; 
     } 

     public View getView(int position, View convertView, ViewGroup parent) { 

      MessageItem.ViewHolder holder = null; 

      MessageItem.Message item = mData.get(position); 

      LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); 


      if (convertView == null) 
      { 
       holder = new MessageItem.ViewHolder(); 

       convertView = mInflater.inflate(item.in_out ? R.layout.chat_message_in_item : R.layout.chat_message_out_item, null, false); 

       if(item.listAttach.size() > 0) 
        holder.attachLL = (LinearLayout) findViewById(R.id.chat_message); 




       for(MessageItem.Message.Attachment attach : item.listAttach) 
       { 
        switch(attach.type) 
        { 
        case PHOTO: 
         if(attach.photo != null) 
         { 
          ImageView iv = new ImageView(convertView.getContext()); 
          //iv.setLayoutParams(params); 
          iv.setId(0x7f000000 - 1); 
          holder.listAttach.add(new MessageItem.Message.Attachment(attach.type,iv)); 
          Log.v("","1" + iv.getId() + " " + holder.listAttach.size()); 
         } 
         else 
          Log.v("", "Null!"); 
         break; 
        } 
       } 

       convertView.setTag(holder); 
      } else { 
       holder = (MessageItem.ViewHolder) convertView.getTag(); 
      } 



      for(int i = 0; i < holder.listAttach.size();i++) 
      { 
       if(holder.listAttach.get(i).type == MessageAttachmentType.PHOTO && item.listAttach.get(i).photo != null && holder.listAttach.get(i).image != null) 
       { 
        holder.attachLL.addView(holder.listAttach.get(i).image); 
        holder.listAttach.get(i).image.setImageBitmap(item.listAttach.get(i).photo); 
       } 

       else 
        Log.v("", "Unable to add image!"); 
      } 


      return convertView; 
     } 
    } 





} 

Et MessageItem.java:

package com.me.my_app; 


import java.util.ArrayList; 
import java.util.Comparator; 

import android.graphics.Bitmap; 
import android.widget.ImageView; 
import android.widget.LinearLayout; 
import android.widget.TextView; 

public class MessageItem 
{ 
    public static class Message implements Comparator<Message> 
    { 
     int id; 
     boolean in_out; 
     boolean is_read; 
     boolean is_delivered; 
     String message; 
     String time; 
     ArrayList<Attachment> listAttach; 
     public Message(int id, boolean in_out, boolean is_read, boolean is_delivered, String message, String time, ArrayList<Attachment> list) 
     { 
      this.id = id; 
      this.in_out = in_out; 
      this.is_read = is_read; 
      this.is_delivered = is_delivered; 
      this.message = message; 
      this.time = time; 
      listAttach = new ArrayList<Attachment>(); 
      if(list != null) 
      { 
       for(Attachment a : list) 
        listAttach.add(a); 
      } 
     } 


     public int compare(Message object1, Message object2) { 
      return object1.time.compareTo(object2.time); 
     } 
     public static class Attachment 
     { 
      ImageView image; 
      MessageAttachmentType type; 
      Bitmap photo; 
      String Uri; 
      public Attachment(MessageAttachmentType type, Bitmap photo) 
      { 
       this.type = type; 
       this.photo = photo; 
      } 
      public Attachment(MessageAttachmentType type, ImageView image) 
      { 
       this.type = type; 
       this.image = image; 
      } 
     } 
    } 

    public static class ViewHolder 
    { 
     LinearLayout attachLL; 
     TextView text, time; 
     ArrayList<MessageItem.Message.Attachment> listAttach; 
     public ViewHolder() 
     { 
      listAttach = new ArrayList<MessageItem.Message.Attachment>(); 
     } 
    } 
} 
enter code here 

Answer 1

Vous aurez très probablement à mettre en œuvre . votre propre adaptateur de liste vous pouvez créer une mise en page pour votre article et le configurer Voici comment faire dans mon code.

public class ExpAdapter extends BaseExpandableListAdapter { 

    /*SOME CODE HERE*/ 

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

     if (convertView == null) { 
      LayoutInflater inflater = (LayoutInflater) myContext 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      convertView = inflater.inflate(R.layout.child_row, null); 
     } 

     int groupId = ((ListTaskElement)this.getGroup(groupPosition)).id;  
     this.setupTaskView(convertView, this.childrenOfGroup(groupId, false).get(childPosition)); 

     convertView.setTag(this.getChildId(groupPosition, childPosition)); 
     return convertView; 
    } 

    /*SOME CODE HERE*/ 

} 

vous trouverez tous les détails ici: http://jnastase.alner.net/archive/2010/12/19/custom-android-listadapter.aspx