Android自定義ListPreference僅允許5個項目

Question

我在this的背面創建了自定義ListPreference示例。

我已經實現它，它的工作原理。但我只能將最多5個項目添加到ListPreference。如果我想補充7個項目，他們出現在列表中，但是當我點擊它，它什麼都不做，只是關閉ListPref對話框並返回到把選項屏幕

public class IconPickerPreference extends ListPreference { 

private class CustomListPreferenceAdapter extends ArrayAdapter<IconItem> { 

    private Context context; 
    private List<IconItem> icons; 
    private int resource; 

    public CustomListPreferenceAdapter(Context context, int resource, List<IconItem> objects) { 
     super(context, resource, objects); 
     this.context = context; 
     this.resource = resource; 
     this.icons = objects; 
    } 

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

     ViewHolder holder; 

     if (convertView == null) { 
      LayoutInflater inflater = (LayoutInflater) context 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      convertView = inflater.inflate(resource, parent, false); 

      holder = new ViewHolder(); 
      holder.iconName = (TextView) convertView 
        .findViewById(R.id.iconName); 
      holder.iconImage = (ImageView) convertView 
        .findViewById(R.id.iconImage); 
      holder.radioButton = (RadioButton) convertView 
        .findViewById(R.id.iconRadio); 
      holder.position = position; 

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

     holder.iconName.setText(icons.get(position).name); 

     int identifier = context.getResources().getIdentifier(
       icons.get(position).file, "drawable", 
       context.getPackageName()); 
     holder.iconImage.setImageResource(identifier); 

     holder.radioButton.setChecked(icons.get(position).isChecked); 

     convertView.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       ViewHolder holder = (ViewHolder) v.getTag(); 
       for (int i = 0; i < icons.size(); i++) { 
        if (i == holder.position) 
         icons.get(i).isChecked = true; 
        else 
         icons.get(i).isChecked = false; 
       } 
       getDialog().dismiss(); 
      } 
     }); 

     return convertView; 
    } 

} 

private static class IconItem { 

    private String file; 
    private boolean isChecked; 
    private String name; 

    public IconItem(CharSequence name, CharSequence file, boolean isChecked) { 
     this(name.toString(), file.toString(), isChecked); 
    } 

    public IconItem(String name, String file, boolean isChecked) { 
     this.name = name; 
     this.file = file; 
     this.isChecked = isChecked; 
    } 

} 

private static class ViewHolder { 
    protected ImageView iconImage; 
    protected TextView iconName; 
    protected int position; 
    protected RadioButton radioButton; 
} 

private Context context; 
private ImageView icon; 

private CharSequence[] iconFile; 
private CharSequence[] iconName; 
private List<IconItem> icons; 
private SharedPreferences preferences; 
private Resources resources; 
private String selectedIconFile, defaultIconFile; 
private TextView summary; 

public IconPickerPreference(Context context, AttributeSet attrs) { 
    super(context, attrs); 
    this.context = context; 

    resources = context.getResources(); 
    preferences = PreferenceManager.getDefaultSharedPreferences(context); 

    TypedArray a = context.getTheme().obtainStyledAttributes(attrs, 
      R.styleable.attrs_icon, 0, 0); 

    try { 
     defaultIconFile = a.getString(R.styleable.attrs_icon_iconFile); 
    } finally { 
     a.recycle(); 
    } 
} 

private String getEntry(String value) { 
    String[] entries = resources.getStringArray(R.array.iconName); 
    String[] values = resources.getStringArray(R.array.iconFile); 
    int index = Arrays.asList(values).indexOf(value); 
    return entries[index]; 
} 

@Override 
protected void onBindView(View view) { 
    super.onBindView(view); 

    selectedIconFile = preferences.getString(
      resources.getString(R.string.custom_icon_key), defaultIconFile); 

    icon = (ImageView) view.findViewById(R.id.iconSelected); 
    updateIcon(); 

    summary = (TextView) view.findViewById(R.id.summary); 
    summary.setText(getEntry(selectedIconFile)); 

} 

@Override 
protected void onDialogClosed(boolean positiveResult) { 
    super.onDialogClosed(positiveResult); 

    if (icons != null) { 
     for (int i = 0; i < icons.size(); i++) { 
      IconItem item = icons.get(i); 
      if (item.isChecked) { 

       Editor editor = preferences.edit(); 
       editor.putString(
         resources.getString(R.string.custom_icon_key), 
         item.file); 
       editor.apply(); 

       selectedIconFile = item.file; 
       updateIcon(); 

       summary.setText(item.name); 

       break; 
      } 
     } 
    } 

} 

@Override 
protected void onPrepareDialogBuilder(Builder builder) { 

    builder.setNegativeButton("Cancel", null); 
    builder.setPositiveButton(null, null); 

    iconName = getEntries(); 
    iconFile = getEntryValues(); 

    if (iconName == null || iconFile == null 
      || iconName.length != iconFile.length) { 
     throw new IllegalStateException(
       "ListPreference requires an entries array " 
         + "and an entryValues array which are both the same length"); 
    } 

    String selectedIcon = preferences.getString(
      resources.getString(R.string.custom_icon_key), 
      resources.getString(R.string.icon_default)); 

    icons = new ArrayList<IconItem>(); 

    for (int i = 0; i < iconName.length; i++) { 
     boolean isSelected = selectedIcon.equals(iconFile[i]) ? true 
       : false; 
     IconItem item = new IconItem(iconName[i], iconFile[i], isSelected); 
     icons.add(item); 
    } 

    CustomListPreferenceAdapter customListPreferenceAdapter = new CustomListPreferenceAdapter(
      context, R.layout.item_picker, icons); 
    builder.setAdapter(customListPreferenceAdapter, null); 

} 

private void updateIcon() { 
    int identifier = resources.getIdentifier(selectedIconFile, "drawable", 
      context.getPackageName()); 

    icon.setImageResource(identifier); 
    icon.setTag(selectedIconFile); 
} 

字符串值

<string-array name="iconName"> 
    <item>CHESTNUT</item> 
    <item>POMEGRANATE</item> 
    <item>OLD BRICK</item> 
    <item>FLAMINGO</item> 
    <item>SNUFF</item> 
    <item>RAZZMATAZZ</item> 
    <item>NEW YORK PINK</item> 
</string-array> 

<string-array name="iconFile"> 
    <item>ic_chestnut</item> 
    <item>ic_pomegranate</item> 
    <item>ic_old_brick</item> 
    <item>ic_flamingo</item> 
    <item>ic_snuff</item> 
    <item>ic_razzmatazz</item> 
    <item>ic_new_york_pink</item> 
</string-array> 

7個IC_ PNG圖片上面繪製的項目...

日誌不顯示任何指標差...

難倒了：P

任何幫助表示讚賞

在此先感謝

Answer 1

我認爲這個問題可能是因爲您保存在你的ViewHolder位置造成的，你爲什麼這樣做呢？

標記最終的位置字段，並直接在OnClickListener中使用它。

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

    ... 

    @Override 
     public void onClick(View v) { 
      ViewHolder holder = (ViewHolder) v.getTag(); 
      for (int i = 0; i < icons.size(); i++) { 
       if (i == position) 
        icons.get(i).isChecked = true; 
       else 
        icons.get(i).isChecked = false; 
      } 
      getDialog().dismiss(); 
     }