自定義佈局ListPreference

Question

請在可以閱讀有關創建自定義佈局列表首選項（背景和佈局頂部面板，面板按鈕）的地方閱讀提示。遇見 - 僅用於自定義行的示例。 對不起 - 谷歌翻譯。

Answer 1

您無法爲ListPreference創建自定義佈局。但是，您可以創建自己的自定義DialogPreference，並將其設置爲您想要的任何形狀。例如，here is a DialogPreference that uses a TimePicker to allow the user to choose a time。 Here is a DialogPreference that allows the user to choose a color。

Answer 2

在preference.xml文件，你可以通過類，即全名com.example.MyPreference

<?xml version="1.0" encoding="utf-8"?> 
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" 
    android:key="pref_wifi_key" 
    android:title="@string/settings"> 
    <ListPreference 
     android:key="pref_wifi_remove" 
     android:title="@string/remove_wifi"/> 
    <com.example.MyPreference 
    android:title="@string/add_wifi"/> 
</PreferenceScreen> 

然後你的類爲MyPreference HOULD的東西是指您的自定義ListPreference像這樣：

import android.preference.ListPreference; 

public class MyPreference extends ListPreference { 

    Context context; 

    public MyPreference(Context context, AttributeSet attrs) { 
     this.context = context; 
     setDialogLayoutResource(R.layout.yourLayout); //inherited from DialogPreference 
     setEntries(new CharSequence[] {"one", "two"}); 
     setEntryValues(new CharSequence[] {"item1", "item2"}); 
    } 
    protected void onDialogClosed(boolean positiveResult) { 
    Toast.makeText(context, "item_selected", 
         Toast.LENGTH_SHORT).show(); 
    } 
} 

Answer 3

1. 在您的喜好xml文件

   < your.domain.CustomListPreference .../>

2. CustomListPreference.java

   class CustomListPreference extends ListPreference { 
   
   mListAdapter = new your_custom_list_adapter(); 
   private int mClickedDialogEntryIndex; 
   public CustomListPreference(Context context, AttributeSet attrs) { 
       super(context, attrs); 
   } 
   
   public CustomListPreference(Context context) { 
       super(context); 
   } 
   
   @Override 
   protected void onPrepareDialogBuilder(Builder builder) { 
        mClickedDialogEntryIndex = findIndexOfValue(getValue()); 
        builder.setSingleChoiceItems(mListAdapter, mClickedDialogEntryIndex, 
         new DialogInterface.OnClickListener() { 
          public void onClick(DialogInterface dialog, int which) { 
           if (mClickedDialogEntryIndex != which) { 
            mClickedDialogEntryIndex = which; 
            CustomListPreference.this.notifyChanged(); 
           } 
           CustomListPreference.this.onClick(dialog, DialogInterface.BUTTON_POSITIVE); 
           dialog.dismiss(); 
          } 
         }); 
        builder.setPositiveButton(null, null); 
   } 
   
   @Override 
   protected void onDialogClosed(boolean positiveResult) { 
       CharSequence[] entryValues = getEntryValues(); 
       if (positiveResult && mClickedDialogEntryIndex >= 0 && entryValues != null) { 
        String value = entryValues[mClickedDialogEntryIndex].toString(); 
        if (callChangeListener(value)) { 
         setValue(value); 
        } 
       } 
   } 
   
   }