Android：自定義選擇器狀態永遠不會變「真」

Question

我已經從這個小時開始苦苦掙扎，我找不到解決方案，希望有人能幫助我。
我有一個ListView與自定義適配器擴展BaseAdapter和列表的每個元素擴展一個LinearLayout只包含一個TextView。我基本上從​​開始。
這是列表元素的list_item.xml佈局文件：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res/com.example.mypackage" 
    android:id="@+id/newItem" 
    app:state_playing="true" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="@drawable/item_selector" 
    android:orientation="horizontal" > 

    <TextView 
     android:id="@+id/textview" 
     style="@style/Text_View_Style_White" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:duplicateParentState="true" 
     android:ellipsize="marquee" 
     android:focusableInTouchMode="true" 
     android:marqueeRepeatLimit="marquee_forever" 
     android:padding="3dp" 
     android:scrollHorizontally="true" 
     android:singleLine="true" 
     android:textColor="@drawable/item_text_selector" /> 
</LinearLayout> 

這裏是BaseAdapter的相關代碼：

class AlbumListAdapter extends BaseAdapter implements Checkable { 

    private Context mContext; 

    public AlbumListAdapter(Context context) { 
     mContext = context; 
    } 

    @Override 
    public int getCount() { 

     return listSize; // is a variable 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     AlbumViewHolder albumHolder = null; 
     if (convertView == null) { 
      // Inflate the layout 
      LayoutInflater li = getActivity().getLayoutInflater(); 
      convertView = li.inflate(R.layout.list_item, null); 
      albumHolder = new AlbumViewHolder(mContext, null); 
      albumHolder.albumTitle = (TextView) convertView 
        .findViewById(R.id.textview); 

      convertView.setTag(albumHolder); 
     } else { 
      albumHolder = (AlbumViewHolder) convertView.getTag(); 
     } 

     albumHolder.albumTitle.setText("Some text in the TextView"); 
     albumHolder.albumTitle.setSelected(true); 

     if (myBooleanCondition) 
     { 
      albumHolder.setPlaying(true); 
      albumHolder.refreshDrawableState(); 

      for (int i = 0; i < albumHolder.getDrawableState().length; i++) { 
       if (albumHolder.getDrawableState()[i] != 0) 
        System.out.println(TAG + " State i = " 
        + i + " -> " + getResources().getResourceEntryName(albumHolder.getDrawableState()[i])); 
      } 
     } 

     return convertView; 
    } 
} 

這裏延伸的LinearLayout列表元素類：

static class AlbumViewHolder extends LinearLayout { 

     private static final int[] STATE_PLAYING_SET = { R.attr.state_playing }; 
     private boolean mIsPlaying = false; 
     TextView albumTitle; 

     public AlbumViewHolder(Context context, AttributeSet attrs) { 
      super(context, attrs); 
     } 

     public void setPlaying(boolean isPlaying) { 
      mIsPlaying = isPlaying; 
     } 

     @Override 
     protected int[] onCreateDrawableState(int extraSpace) { 
      final int[] drawableState = super 
        .onCreateDrawableState(extraSpace + 1); 
      if (mIsPlaying) { 
       System.out.println(TAG 
         + " - onCreateDrawableState() -> mIsPlaying = " 
         + mIsPlaying); 
       mergeDrawableStates(drawableState, STATE_PLAYING_SET); 
      } 
      return drawableState; 
     } 
    } 

這裏是attrs.xml

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
    <declare-styleable name="music"> 
     <attr name="state_playing" format="boolean" /> 
     <attr name="playing" format="boolean" /> 
    </declare-styleable> 
</resources> 

，這裏的2個選擇器試圖使用選擇狀態state_playing，一個用於每個元件的的LinearLayout（item_selector.xml）的背景：

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res/com.example.mypackage"> 

    <item android:drawable="@color/blue_fluo3" app:state_playing="true"/> 
    <item android:drawable="@color/orange_fluo" android:state_pressed="true" app:state_playing="false"/> 
    <item android:drawable="@color/orange_fluo" android:state_activated="true" app:state_playing="false"/> 
    <item android:drawable="@android:color/transparent" app:state_playing="false"/> 

</selector> 

，一個用於TextView的的文字顏色（item_text_selector .XML）：

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res/com.example.mypackage"> 

    <item app:state_playing="true" android:color="@color/orange_fluo"/> 
    <item android:state_pressed="true" app:state_playing="false" android:color="@color/black"/> 
    <item android:state_activated="true" app:state_playing="false" android:color="@color/black"/> 
    <item app:state_playing="false" android:color="@android:color/white"/> 

</selector> 

結果是兩個相同的：state_playing似乎工作，但只有在狀態「假」，因爲如果我在選擇狀態列表的開頭添加一行<item app:state_playing="false" android:color="@color/yellow"/>爲文本選擇器和背景選擇器一切工作正常，我可以看到帶有紅色背景的LinearLayout和帶有黃色文本的文本！
我真的不知道該怎麼去嘗試了...（即使我默認設置爲在XML佈局中的對象（app:state_playing="true"）的財產這是行不通的！

任何幫助，暗示或經驗共享極爲賞識！

Answer 1

它看起來不錯給我，但我建議在下面的容器佈局設置duplicateParentState。我有自己並沿着這些線路問題的模糊的記憶......

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res/com.example.mypackage" 
android:id="@+id/newItem" 
android:duplicateParentState="true" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:background="@drawable/item_selector" 
android:orientation="horizontal" > 

<TextView 
    android:id="@+id/textview" 
    style="@style/Text_View_Style_White" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:duplicateParentState="true" 
    android:ellipsize="marquee" 
    android:focusableInTouchMode="true" 
    android:marqueeRepeatLimit="marquee_forever" 
    android:padding="3dp" 
    android:scrollHorizontally="true" 
    android:singleLine="true" 
    android:textColor="@drawable/item_text_selector" />