Android中Fragmen使用自定义的ListPreference Android中Fragmen首选项使用自定义的ListPreference的方法

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <declare-styleable name="IconListPreference">
  <attr name="entryIcons" format="reference" />
 </declare-styleable>
</resources>

public IconListPreference(Context context, AttributeSet attrs) {
 super(context, attrs);
 mContext = context;

 // 获取自定义的属性(attrs.xml中)对应行的TypedArray
 TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.IconListPreference);
 // 获取entryIcons属性对应的值
 int iconResId = a.getResourceId(R.styleable.IconListPreference_entryIcons, -1);
 if (iconResId != -1) {
  setEntryIcons(iconResId);
 } 

 // 获取Preferece对应的key
 mKey = getKey();
 // 获取SharedPreferences
 mPref = PreferenceManager.getDefaultSharedPreferences(context);
 // 获取SharedPreferences.Editor
 mEditor = mPref.edit();
 // 获取Entry
 // 注意：如果配置文件中没有android:entries属性，则getEntries()为空；
 mEntries = getEntries();
 // 获取Entry对应的值
 // 注意：如果配置文件中没有android:entryValues属性，则getEntries()为空
 mEntryValues = getEntryValues();

 // 获取该ListPreference保存的值
 String value = mPref.getString(mKey, "");
 mPosition = findIndexOfValue(value);
 // 设置Summary
 if (mPosition!=-1) {
  setSummary(mEntries[mPosition]);
  setIcon(mEntryIcons[mPosition]);
 } 

 a.recycle();
}

/**
 * 设置图标：icons数组
 */
private void setEntryIcons(int[] entryIcons) {
 mEntryIcons = entryIcons;
}

/**
 * 设置图标：根据icon的id数组
 */
public void setEntryIcons(int entryIconsResId) {
 TypedArray icons = getContext().getResources().obtainTypedArray(entryIconsResId);
 int[] ids = new int[icons.length()];
 for (int i = 0; i < icons.length(); i++)
  ids[i] = icons.getResourceId(i, -1);
 setEntryIcons(ids);
 icons.recycle();
}

@Override
protected void onPrepareDialogBuilder(Builder builder) {
 super.onPrepareDialogBuilder(builder);

 IconAdapter adapter = new IconAdapter(mContext);
 builder.setAdapter(adapter, null);
}

public class IconAdapter extends BaseAdapter{

 private LayoutInflater mInflater;


 public IconAdapter(Context context){
  this.mInflater = LayoutInflater.from(context);
 }
 @Override
 public int getCount() {
  return mEntryIcons.length;
 }

 @Override
 public Object getItem(int arg0) {
  return null;
 }

 @Override
 public long getItemId(int arg0) {
  return 0;
 }

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

  ViewHolder holder = null;
  if (convertView == null) {

   holder = new ViewHolder();

   convertView = mInflater.inflate(R.layout.icon_adapter, parent, false);
   holder.layout = (LinearLayout)convertView.findViewById(R.id.icon_layout);
   holder.img = (ImageView)convertView.findViewById(R.id.icon_img);
   holder.info = (TextView)convertView.findViewById(R.id.icon_info);
   holder.check = (RadioButton)convertView.findViewById(R.id.icon_check);
   convertView.setTag(holder);

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

  holder.img.setBackgroundResource(mEntryIcons[position]);
  holder.info.setText(mEntries[position]);
  holder.check.setChecked(mPosition == position);

  final ViewHolder fholder = holder;
  final int fpos = position;
  convertView.setOnClickListener(new View.OnClickListener() {

   @Override
   public void onClick(View v) {
    v.requestFocus();
    // 选中效果
    fholder.layout.setBackgroundColor(Color.CYAN);

    // 更新mPosition
    mPosition = fpos;
    // 更新Summary
    IconListPreference.this.setSummary(mEntries[fpos]);
    IconListPreference.this.setIcon(mEntryIcons[fpos]);
    // 更新该ListPreference保存的值
    mEditor.putString(mKey, mEntryValues[fpos].toString());
    mEditor.commit();

    // 取消ListPreference设置对话框
    getDialog().dismiss();
   }
  });

  return convertView;
 }

 // ListPreference每一项对应的Layout文件的结构体
 private final class ViewHolder {
  ImageView img;
  TextView info;
  RadioButton check;
  LinearLayout layout;
 }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/icon_layout" 
 android:orientation="horizontal"
 android:paddingLeft="6dp" 
 android:layout_width="fill_parent"
 android:layout_height="fill_parent">


 <ImageView
  android:id="@+id/icon_img" 
  android:layout_width="wrap_content"
  android:layout_height="wrap_content" 
  android:gravity="center_vertical"
  android:layout_margin="4dp"/>

 <TextView
  android:id="@+id/icon_info" 
  android:layout_width="0dp"
  android:layout_height="wrap_content" 
  android:layout_weight="1"
  android:paddingLeft="6dp"
  android:layout_gravity="left|center_vertical"
  android:textAppearance="?android:attr/textAppearanceLarge" />

 <RadioButton
  android:id="@+id/icon_check"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:checked="false"
  android:layout_gravity="right|center_vertical"
  android:layout_marginRight="6dp"/>

</LinearLayout>

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:iconlistpreference="http://schemas.android.com/apk/res/com.skw.fragmenttest">

 <!-- 系统默认的ListPreference -->
 <PreferenceCategory
  android:title="PreferenceCategory A">

  <!-- 
   (01) android:key是Preferece的id
   (02) android:title是Preferece的大标题
   (03) android:summary是Preferece的小标题
   (04) android:dialogTitle是对话框的标题
   (05) android:defaultValue是默认值
   (06) android:entries是列表中各项的说明
   (07) android:entryValues是列表中各项的值
   -->
  <ListPreference 
   android:key="list_preference" 
   android:dialogTitle="Choose font" 
   android:entries="@array/pref_font_types" 
   android:entryValues="@array/pref_font_types_values" 
   android:summary="sans" 
   android:title="Font" 
   android:defaultValue="sans"/> 
 </PreferenceCategory>

 <!-- 自定义的ListPreference -->

 <PreferenceCategory
  android:title="PreferenceCategory B">

  <!-- 
   iconlistpreference:entryIcons是自定义的属性
   -->
  <com.skw.fragmenttest.IconListPreference
   android:key="icon_list_preference" 
   android:dialogTitle="ChooseIcon" 
   android:entries="@array/android_versions"
   android:entryValues="@array/android_version_values" 
   iconlistpreference:entryIcons="@array/android_version_icons"
   android:icon="@drawable/cupcake"
   android:summary="summary_icon_list_preference"
   android:title="title_icon_list_preference" /> 

 </PreferenceCategory>

</PreferenceScreen>

public class PrefsFragment extends PreferenceFragment {

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  addPreferencesFromResource(R.xml.preferences);
 }

 ...
}

public class FragmentTest extends Activity {

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  // 获取FragmentManager
  FragmentManager fragmentManager = getFragmentManager();
  // 获取FragmentTransaction  
  FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

  PrefsFragment fragment = new PrefsFragment();
  // 将fragment添加到容器frag_example中
  fragmentTransaction.add(R.id.prefs, fragment);
  fragmentTransaction.commit();
 } 
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 >

 <FrameLayout
  android:id="@+id/prefs"
  android:layout_width="match_parent"
  android:layout_height="match_parent"/>

</LinearLayout>