Question

我的代码中有一个ListView，其中包含TextView个孩子，当OnItemClickListener被解雇时，我会收到一个视图。这个视图是我从ListView中单击的视图。从这一部分，我将转换此视图使其成为TextView。接下来，我将设置此TextView的文本。问题是，当我向上/向下滚动ListView时，一些ListView的子文本也会发生变化。 ListView重绘其子项，其中包含其他子文本的文本。我该如何解决这个问题？

更新：我在OnItemClickListener上收到的视图与其他子视图在某种程度上相同。当我尝试使用equals（）方法比较我单击的上一个视图和新单击的视图时，我发现了这一点。滚动列表视图会重绘其子项，但有时会出现与其他子视图相同的子视图，这些视图在列表中不可见。

这是我的OnItemClickListener

messagesContainer.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                if(adapter.getItemViewType(i)==ChatAdapter.VOICE_MESSAGE){
                    RelativeLayout rootView = (RelativeLayout) view;
                    LinearLayout content = (LinearLayout) rootView.getChildAt(0);
                    LinearLayout contentWithBackground = (LinearLayout) content.getChildAt(1);
                    LinearLayout voiceContent = (LinearLayout) contentWithBackground.getChildAt(1);
                    TextView voiceMessage = (TextView) voiceContent.getChildAt(0);
                    voiceMessage.setText("Sample Text");
                }
            }
        });

这是我的适配器

public class ChatAdapter extends BaseAdapter {

    private List<QBChatMessage> chatMessages;
    private Context context;
    private static final int TXT_MESSAGE = 0;
    private static final int IMAGE_MESSAGE = 1;
    public static final int VOICE_MESSAGE = 2;
    private DisplayImageOptions displayImageOptions;

    public ChatAdapter(Context context, List<QBChatMessage> chatMessages){
        this.chatMessages = chatMessages;
        this.context = context;
        initImageLoaderOptions();
    }

    public void initImageLoaderOptions() {
        displayImageOptions = new DisplayImageOptions.Builder().showImageOnLoading(R.drawable.ic_stub)
                .showImageForEmptyUri(R.drawable.ic_empty).showImageOnFail(R.drawable.ic_error).cacheInMemory(true)
                .cacheOnDisc(true).considerExifParams(true).bitmapConfig(Bitmap.Config.RGB_565).build();
    }

    @Override
    public int getViewTypeCount() {
        return 3;
    }

    @Override
    public int getItemViewType(int position){
        if(getItem(position).getProperty("fileUID") == null){
            return TXT_MESSAGE;
        } else {
            if (getItem(position).getProperty("type").equals(QBAttachment.PHOTO_TYPE)) {
                return IMAGE_MESSAGE;
            } else {
                return VOICE_MESSAGE;
            }
        }
    }

    @Override
    public int getCount() {
        if(chatMessages!=null){
            return chatMessages.size();
        } else{
            return 0;
        }
    }

    @Override
    public QBChatMessage getItem(int position) {
        if(chatMessages!=null){
            return chatMessages.get(position);
        } else{
            return null;
        }
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final ViewHolder holder;
        QBChatMessage chatMessage = getItem(position);
        final LayoutInflater vi = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        int type = getItemViewType(position);

        if (convertView == null) {
            if(type == TXT_MESSAGE){
                convertView = vi.inflate(R.layout.list_item_message, null);
            } else if(type == IMAGE_MESSAGE){
                convertView = vi.inflate(R.layout.list_item_message_image, null);
            } else{
                convertView = vi.inflate(R.layout.list_item_message_voice, null);
            }
            holder = createViewHolder(convertView, type, position);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        QBUser currentUser = ChatService.getInstance().getCurrentUser();

        boolean isOutgoing = chatMessage.getSenderId() != null && chatMessage.getSenderId().equals(currentUser.getId());
        setAlignment(holder, isOutgoing, type);

        if (chatMessage.getProperty("fullName") != null) {
            holder.txtInfo.setText(chatMessage.getProperty("fullName") + ": " + getTimeText(chatMessage));
        } else {
            holder.txtInfo.setText(getTimeText(chatMessage));
        }

        if(type == TXT_MESSAGE){
            holder.txtMessage.setText(chatMessage.getBody());
        } else if (type == IMAGE_MESSAGE){
            Log.i("Loading", "Loading");
            ImageLoader.getInstance().displayImage(AttachmentConstants.URL_S3+chatMessage.getProperty("fileUID"), holder.imageMessage, displayImageOptions);
        }

        ImageLoader.getInstance().displayImage(AttachmentConstants.URL_FACEBOOK_OPEN+chatMessage.getProperty("social_picture")+ AttachmentConstants.URL_FACEBOOK_CLOSING, holder.socialPhoto, displayImageOptions);

        return convertView;
    }

    private ViewHolder createViewHolder(View v, int type, final int position) {
        final ViewHolder holder = new ViewHolder();
        holder.content = (LinearLayout) v.findViewById(R.id.content);
        holder.contentWithBG = (LinearLayout) v.findViewById(R.id.contentWithBackground);
        holder.txtInfo = (TextView) v.findViewById(R.id.txtInfo);
        holder.socialPhoto = (ImageView) v.findViewById(R.id.social_photo);

        if(type == TXT_MESSAGE){
            holder.txtMessage = (TextView) v.findViewById(R.id.txtMessage);
        } else if(type == IMAGE_MESSAGE) {
            holder.imageMessage = (ImageView) v.findViewById(R.id.imageMessage);
        } else{
            holder.voiceMessage = (TextView) v.findViewById(R.id.voiceMessage);
            holder.voiceSeekBar = (SeekBar) v.findViewById(R.id.voiceSeekBar);
            holder.voiceSeekBar.setEnabled(false);
        }
        return holder;
    }

    private String getTimeText(QBChatMessage message) {
        return TimeUtils.millisToLongDHMS(message.getDateSent() * 1000);
    }

    private static class ViewHolder {
        public TextView txtMessage;
        public TextView txtInfo;
        public LinearLayout content;
        public LinearLayout contentWithBG;
        public ImageView socialPhoto;
        public ImageView imageMessage;
        public TextView voiceMessage;
        public SeekBar voiceSeekBar;
    }
}

这是list_item_message_voice.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <LinearLayout
        android:id="@+id/content"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:orientation="vertical"
        android:descendantFocusability="blocksDescendants">

        <TextView
            android:id="@+id/txtInfo"
            android:layout_width="wrap_content"
            android:layout_height="20sp"
            android:layout_gravity="right"
            android:textSize="10sp"
            android:textColor="@android:color/secondary_text_dark" />

        <LinearLayout
            android:id="@+id/contentWithBackground"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right"
            android:background="@drawable/incoming_message_bg"
            android:paddingLeft="10dp"
            android:paddingBottom="10dp"
            android:orientation="horizontal">

            <ImageView
                android:layout_margin="10dp"
                android:id="@+id/social_photo"
                android:layout_width="33.33dp"
                android:layout_height="33.33dp" />


            <LinearLayout
                android:id="@+id/voiceContent"
                android:orientation="vertical"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content">

                <TextView
                    android:text="Play"
                    android:id="@+id/voiceMessage"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="@android:color/black"/>

                <SeekBar
                    android:id="@+id/voiceSeekBar"
                    android:layout_width="100dp"
                    android:layout_height="wrap_content" />
            </LinearLayout>


        </LinearLayout>

    </LinearLayout>
</RelativeLayout>

Answer 1

由于您更改了TextView中的文本，但未更改适配器的chatMessages列表中的文本，因此文本发生了变化。

 @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                if(adapter.getItemViewType(i)==ChatAdapter.VOICE_MESSAGE){
                    //Your code.....
                    voiceMessage.setText("Sample Text");
                   //Update the chat messages in the list.

                }
            }

Answer 2

你可以这样做：

messagesContainer.setOnItemClickListener(new AdapterView.OnItemClickListener() 
    {
     @Override
     public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) 
     {
       TextView voiceMessage = (TextView)view.findViewById(R.id.txtMessage);
       if(!voiceMessage.getText().toString().equals(""))
       voiceMessage.setText("Sample Text");

      }
});

尝试在适配器中替换它

    else 
    {
      if(!holder.txtInfo.getText().toString().equals(""))
      holder.txtInfo.setText(getTimeText(chatMessage));
    }

Answer 3

if(convertView == null){          
    convertView = vi.inflate(R.layout.list_item_message, null);
}

// You can set the data here...

return covertView;

将TextView的文本设置为ListView的子项会影响其他子视图文本

3 个答案: