java.lang.ClassCastException : android.widget.RelativeLayout $ LayoutParams를 android.widget.LinearLayout $ LayoutParams로 캐스팅 할 수 없습니다.

Question

채팅 앱을 사용할 예정이지만 수신 메시지의 9 가지 패치 이미지를 왼쪽 및 오른쪽으로 찾을 수 없습니다. 나가는 메시지를 오른쪽으로.

java.lang.ClassCastException가 : android.widget.RelativeLayout $의 LayoutParams이 android.widget.LinearLayout $의 LayoutParams 캐스트 할 수없는

내 어댑터 클래스 :

LayoutParams를 사용하는 동안 나는이 예외를 가지고

public class MessageAdapter extends ResourceCursorAdapter { 
    private final int backgroundDrawableIn, backgroundDrawableOut 
    private final MessageListActivity mActivity; 
    private String displayName = null; 
    private final int textSize, textColor; 
    private final boolean convertNCR; 
    private final boolean showEmoticons; 

    private static class ViewHolder { 
     TextView tvBody; 
     TextView tvDate; 
     ImageView ivPhoto; 
     View vRead; 
     public View vPending; 
     // public View vLayout; 
     public RelativeLayout vLayout; 
    } 
    public MessageAdapter(final MessageListActivity c, final Uri u) { 
     super(c, R.layout.messagelist_item, getCursor(c.getContentResolver(), u), true); 
     mActivity = c; 
     backgroundDrawableIn = PreferencesActivity.getBubblesIn(c); 
     backgroundDrawableOut = PreferencesActivity.getBubblesOut(c); 
     textSize = PreferencesActivity.getTextsize(c); 
     textColor = PreferencesActivity.getTextcolor(c); 
     convertNCR = PreferencesActivity.decodeDecimalNCR(c); 
     showEmoticons = PreferencesActivity.showEmoticons(c); 
     int threadId = -1; 
     if (u == null || u.getLastPathSegment() == null) { 
      threadId = -1; 
     } else { 
      threadId = Integer.parseInt(u.getLastPathSegment()); 
     } 
     final Conversation conv = Conversation.getConversation(c, threadId, false); 

     // Address 
     String address = null; 

     //Name 
     String name = null; 
     if (conv == null) { 
      address = null; 
      name = null; 
      displayName = null; 
     } else { 
      final Contact contact = conv.getContact(); 
      address = contact.getNumber(); 
      name = contact.getName(); 
      displayName = contact.getDisplayName(); 
     } 
    } 

    @Override 
    public final void bindView(final View view, final Context context, final Cursor cursor) { 
     final Message m = Message.getMessage(context, cursor); 

     ViewHolder holder = (ViewHolder) view.getTag(); 
     if (holder == null) { 
      holder = new ViewHolder(); 
      holder.tvBody = (TextView) view.findViewById(R.id.body); 
      holder.tvDate = (TextView) view.findViewById(R.id.date); 
      holder.ivPhoto = (ImageView) view.findViewById(R.id.picture); 
      holder.vRead = view.findViewById(R.id.read); 
      holder.vPending = view.findViewById(R.id.pending); 
      //holder.vLayout = view.findViewById(R.id.layout); 
      holder.vLayout=(RelativeLayout)view.findViewById(R.id.layout); 
      view.setTag(holder); 
     } 

     if (textSize > 0) { 
      holder.tvBody.setTextSize(textSize); 
     } 
     final int col = textColor; 
     if (col != 0) { 
      holder.tvBody.setTextColor(col); 
      holder.tvDate.setTextColor(col); 
     } 
     int t = m.getType(); 

     String subject = m.getSubject(); 
     if (subject == null) { 
      subject = ""; 
     } else { 
      subject = ": " + subject; 
     } 
     // incoming/outgoing/pending 
     int pendingvisability = View.GONE; 
     switch (t) { 
      case Message.SMS_DRAFT: 
       pendingvisability = View.VISIBLE; 
      case Message.SMS_OUT: 
      case Message.MMS_OUT: 
       try { 
        holder.vLayout.setBackgroundResource(backgroundDrawableOut); 
        LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) holder.vLayout.getLayoutParams(); 
        layoutParams.gravity = Gravity.LEFT; 
        holder.vLayout.setLayoutParams(layoutParams); 
        LinearLayout.LayoutParams lp=(LinearLayout.LayoutParams) holder.tvBody.getLayoutParams(); 
        layoutParams.gravity = Gravity.LEFT; 
        holder.tvBody.setLayoutParams(lp); 
        LinearLayout.LayoutParams lpp=(LinearLayout.LayoutParams) holder.tvDate.getLayoutParams(); 
        layoutParams.gravity = Gravity.LEFT; 
        holder.tvDate.setLayoutParams(lpp); 

       } catch (OutOfMemoryError e) { 
        Log.e(TAG, "OOM while setting bg", e); 
       } 
       break; 
      case Message.SMS_IN: 
      case Message.MMS_IN: 
      default: 
       try { 
        holder.vLayout.setBackgroundResource(backgroundDrawableIn); 
        LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) holder.vLayout.getLayoutParams(); 
        layoutParams.gravity = Gravity.RIGHT; 
        holder.vLayout.setLayoutParams(layoutParams); 

        LinearLayout.LayoutParams lp=(LinearLayout.LayoutParams) holder.tvBody.getLayoutParams(); 
        layoutParams.gravity = Gravity.RIGHT; 
        holder.tvBody.setLayoutParams(lp); 

        LinearLayout.LayoutParams lpp=(LinearLayout.LayoutParams) holder.tvDate.getLayoutParams(); 
        layoutParams.gravity = Gravity.RIGHT; 
        holder.tvDate.setLayoutParams(lpp); 



       } catch (OutOfMemoryError e) { 
        Log.e(TAG, "OOM while setting bg", e); 
       } 
       holder.vPending.setVisibility(View.GONE); 
       break; 
     } 
     holder.vPending.setVisibility(pendingvisability); 
     if (m.getRead() == 0) { 
      holder.vRead.setVisibility(View.VISIBLE); 
     } else { 
      holder.vRead.setVisibility(View.INVISIBLE); 
     } 

     final long time = m.getDate(); 
     holder.tvDate.setText(Conversation_list.getDate(context, time)); 

     final Bitmap pic = m.getPicture(); 
     if (pic != null) { 
      if (pic == Message.BITMAP_PLAY) { 
       holder.ivPhoto.setImageResource(R.drawable.mms_play_btn); 
      } else { 
       holder.ivPhoto.setImageBitmap(pic); 
      } 
      holder.ivPhoto.setVisibility(View.VISIBLE); 
      final Intent i = m.getContentIntent(); 
      holder.ivPhoto.setOnClickListener(VSMS.getOnClickStartActivity(context, i)); 

     } else { 
      holder.ivPhoto.setVisibility(View.GONE); 
      holder.ivPhoto.setOnClickListener(null); 
     } 

     CharSequence text = m.getBody(); 
     if (text == null) { 
      holder.tvBody.setVisibility(View.INVISIBLE); 
     } else { 
      if (convertNCR) { 
       text = Converter.convertDecNCR2Char(text); 
      } 
      if (showEmoticons) { 
       text = SmileyParser.getInstance(context).addSmileySpans(text); 
      } 
      holder.tvBody.setText(text); 
      holder.tvBody.setVisibility(View.VISIBLE); 

     } 
    } 
} 

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" 
> 

<View 
    android:id="@+id/read" 
    android:background="#007e88" 
    android:layout_height="wrap_content" 
    android:layout_width="5dip" 
    android:layout_marginRight="1dip" 
    android:layout_alignParentStart="true" /> 

<RelativeLayout 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentRight="true" 
    android:orientation="vertical" 
    android:id="@+id/layout"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/body" 
     android:text="@+id/body" 
     android:layout_gravity="right" 
     android:layout_below="@+id/addr" 
     android:singleLine="false" 
     android:autoLink="all" 
     /> 
    <ImageView 
     android:id="@+id/pending" 
     android:layout_height="fill_parent" 
     android:layout_width="wrap_content" 
     android:layout_marginLeft="2dip" 
     android:layout_toRightOf="@+id/date" 
     android:src="@drawable/ic_sms_mms_pending" 
     android:visibility="gone" 
     /> 
    <TextView 
     android:layout_width="wrap_content" 
     android:layout_below="@id/body" 
     android:layout_gravity="right" 
     android:layout_height="wrap_content" 
     android:id="@+id/date" 
     android:text="@+id/date" 
     android:singleLine="true"/> 




</RelativeLayout> 
<ImageView 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/picture" 
    android:visibility="gone" 

    android:maxWidth="178dip" 
    android:maxHeight="178dip" 
    android:adjustViewBounds="true" 
    android:background="@android:drawable/picture_frame" 
    android:layout_centerHorizontal="true"/> 

</RelativeLayout> 

Answer 1

선형 레이아웃 대신 relativelayout을 사용해보십시오. 부모 클래스를 사용해야합니다.

Answer 2

귀하의 예외는 다음과 같은 라인에 의해 발생합니다 :

LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) holder.vLayout.getLayoutParams(); 

vLayout이 RelativeLayout의 인스턴스이며, 따라서 당신이 RelativeLayout.LayoutParams하지 LinearLayout.LayoutParams의 인스턴스를 반환합니다 getLayoutParams()를 호출하는 경우. 이 사실을 감안할 때 반환 값을 LinearLayout params으로 캐스팅하면 RelativeLayout.LayoutParams이 LinearLayout.LayoutParams과 다른 클래스이므로 예외가 발생합니다. 문제를 해결하려면 LinearLayout.LayoutParams을 모두 RelativeLayout.LayoutParams으로 대체하십시오.

RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) holder.vLayout.getLayoutParams();