android – 无法更改ImageView的可见性

概述我有一个ListView使用自定义cursoradapter来填充ListView. row.xml <?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_paren 我有一个ListVIEw使用自定义cursoradapter来填充ListVIEw.

row.xml

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    androID:orIEntation="horizontal" >   <linearLayout       androID:orIEntation="vertical"       androID:layout_wIDth="0dip"       androID:layout_weight="1"       androID:layout_height="fill_parent">       <TextVIEw           androID:ID="@+ID/Title"           androID:layout_wIDth="fill_parent"           androID:layout_height="wrap_content"           androID:singleline="true"           androID:gravity="center_vertical"           androID:ellipsize="marquee"           androID:textSize="24dp" />       <TextVIEw           androID:layout_wIDth="fill_parent"           androID:layout_height="wrap_content"           androID:ID="@+ID/artist"           androID:singleline="true"           androID:ellipsize="marquee"           androID:textSize="14dp" />    </linearLayout>    <ImageVIEw       androID:ID="@+ID/currentplaying"       androID:layout_wIDth="wrap_content"       androID:layout_height="fill_parent"       androID:layout_marginleft="1dip"       androID:src="@androID:drawable/ic_media_play"       androID:contentDescription="@string/Now_playing"       androID:visibility="gone" /></linearLayout>

如您所见,ImageVIEw的可见性消失了.我想成功
对于一个特定行可见.这是我尝试的代码,但事实并非如此
工作…

VIEw vIEw = getListVIEw().getAdapter().getVIEw(0,null,null);ImageVIEw iv = (ImageVIEw)vIEw.findVIEwByID(R.ID.currentplaying);iv.setVisibility(ImageVIEw.VISIBLE);

提前致谢.

@OverrIDepublic VIEw getVIEw(int position,VIEw convertVIEw,VIEwGroup parent) {    VIEwHolder holder;    if(convertVIEw==null) {        holder = new VIEwHolder();        convertVIEw = inflater.inflate(R.layout.yourlayout,null);        holder.imgVIEwlogo = (ImageVIEw) convertVIEw.findVIEwByID(R.ID.imgVIEwlogo);        convertVIEw.setTag(holder);    }    else {        holder=(VIEwHolder)convertVIEw.getTag();    }    if(position==0) {             holder.imgVIEwlogo.setVisiblity(VIEw.VISIBLE);    }    return convertVIEw;}

编辑：

我搞定了.我用它来启动ListVIEw活动.

intent.putExtra("ID",c.getInt(c.getColumnIndex(DatabaseHelper._ID)));startActivity(intent);

在ListVIEw活动中,

currentplayingID = getIntent().getExtras().getInt("ID");

然后我在bindvIEw()中添加了这个

ImageVIEw imgvIEw = (ImageVIEw)vIEw.findVIEwByID(R.ID.currentplaying);int ID = c.getInt(c.getColumnIndex(DatabaseHelper._ID));if (ID == SongsListActivity.this.currentplayingID)    imgvIEw.setVisibility(VIEw.VISIBLE);else    imgvIEw.setVisibility(VIEw.GONE);

解决方法 我搞定了.我用它来启动列表视图活动.

intent.putExtra("ID",c.getInt(c.getColumnIndex(DatabaseHelper._ID)));startActivity(intent);

在ListvIEw活动中,

currentplayingID = getIntent().getExtras().getInt("ID");

然后我在bindvIEw()中添加了这个

ImageVIEw imgvIEw = (ImageVIEw)vIEw.findVIEwByID(R.ID.currentplaying);int ID = c.getInt(c.getColumnIndex(DatabaseHelper._ID));if ( ID == SongsListActivity.this.currentplayingID )imgvIEw.setVisibility(VIEw.VISIBLE);elseimgvIEw.setVisibility(VIEw.GONE);

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