android– 为ListView设置TypeFace

概述我有2个XML文件列表视图.一个用于视图,另一个用于第一个.note_list.XML是：<?xmlversion="1.0"encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apkes/android"android:layout_width="match_parent"a

我有2个XML文件列表视图.一个用于视图,另一个用于第一个.
note_List.XML是：

<?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="vertical"    androID:padding="10dip" >    <button        androID:ID="@+ID/allNotes_btn_refresh_List"        androID:layout_wIDth="fill_parent"        androID:layout_height="wrap_content"        androID:text="@string/all_note_refresh_List" />    <ListVIEw        androID:ID="@androID:ID/List"        androID:layout_wIDth="fill_parent"        androID:layout_height="match_parent" /></linearLayout>

和List_otem.XML是：

<?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="vertical" >    <TextVIEw        androID:ID="@+ID/List_lbl_ID"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:visibility="gone" />    <TextVIEw        androID:ID="@+ID/List_lbl_subject"        androID:layout_wIDth="fill_parent"        androID:layout_height="wrap_content"        androID:textAppearance="?androID:attr/textAppearanceLarge" />    <TextVIEw        androID:ID="@+ID/List_lbl_date"        androID:layout_wIDth="fill_parent"        androID:layout_height="wrap_content"        androID:textAppearance="?androID:attr/textAppearanceSmall" /></linearLayout>

在下面的代码中,我为列表设置了适配器：

ArrayList<HashMap<String, String>> noteList;ListVIEw lv;@OverrIDepublic voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.note_List);    noteList = new ArrayList<HashMap<String, String>>();    lv = getListVIEw();    lv.setonItemClickListener(new OnItemClickListener() {        public voID onItemClick(AdapterVIEw<?> parent, VIEw vIEw,                int position, long ID) {            String note_ID = ((TextVIEw) vIEw                    .findVIEwByID(R.ID.List_lbl_ID)).getText().toString();            Intent i = new Intent(getApplicationContext(), NoteDetail.class);            i.putExtra("note_ID", note_ID);            startActivityForResult(i, 100);        }    });}public class LoadAllNotes extends AsyncTask<String, String, String> {        @OverrIDe        protected voID onPreExecute() {            super.onPreExecute();            pDialog = new ProgressDialog(AllNotes.this);            pDialog.setMessage("???? ??? ????...");            pDialog.setIndeterminate(false);            pDialog.setCancelable(true);            pDialog.show();            noteList.clear();        }        protected String doInBackground(String... args) {            UserFunctions userFunctions = new UserFunctions();            Json = userFunctions.getAllNotes(userID);            Log.i("AllNotes >> Json >>", Json.toString());            return null;        }        protected voID onPostExecute(String file_url) {            pDialog.dismiss();            try {                if (Json.has(KEY_SUCCESS)) {                    String success = Json.getString(KEY_SUCCESS);                    if (success.equals("1")) {                        notes = Json.getJsONObject("notes");                        for (int i = 0; i < notes.length(); i++) {                            JsONObject c = notes.getJsONObject(Integer                                    .toString(i));                            Log.i("JsONObject c >>", c.toString());                            String ID = c.getString(KEY_NOTE_ID);                            String subject = c.getString(KEY_NOTE_SUBJECT);                            String date = c.getString(KEY_NOTE_DATE);                            HashMap<String, String> map = new HashMap<String, String>();                            map.put(KEY_NOTE_ID, ID);                            map.put(KEY_NOTE_SUBJECT, subject);                            map.put(KEY_NOTE_DATE, date);                            noteList.add(map);                        }                    }                }            } catch (JsONException e) {                e.printstacktrace();            }            runOnUiThread(new Runnable() {                public voID run() {                    listadapter adapter = new SimpleAdapter(AllNotes.this,                            noteList, R.layout.List_item, new String[] {                                    KEY_NOTE_ID, KEY_NOTE_SUBJECT,                                    KEY_NOTE_DATE }, new int[] {                                    R.ID.List_lbl_ID, R.ID.List_lbl_subject,                                    R.ID.List_lbl_date });                    setlistadapter(adapter);                }            });        }    }

如何在item_List.XML中为TextVIEws设置类型面？我在java代码中为内容视图设置了note_List.所以无法访问List_item.xml的视图.谢谢你的帮助.

解决方法:

您需要覆盖SimpleAdapter的getVIEw(int position,VIEw convertVIEw,VIEwGroup parent)方法并将结果转换为TextVIEw.对于R.layout.List_item布局,这应该是安全的,尽管您可能需要仔细检查.

从那里开始,设置字体照常工作.

片段,放在SimpleAdapter的(匿名)扩展中：

Typeface mTypeface = ... // only needs to be initialised once.@OverrIDe public VIEw getVIEw(int position, VIEw convertVIEw, VIEwGroup parent) {    VIEw vIEw = super.getVIEw(position, convertVIEw, parent);    TextVIEw textvIEw = (TextVIEw) vIEw;    textvIEw.setTypeface(mTypeface);    return textvIEw;}

如果,或许在将来的某个时候,你将会有一个更复杂的布局,而不仅仅是一个TextVIEw,我会考虑实现你自己的ArrayAdapter扩展.有很多关于如何去做的例子(也查看VIEwHolder / RowWrapper模式)它会让你完全控制.

编辑：下面的示例代码.

public class TypefacedSimpleAdapter extends SimpleAdapter {    private final Typeface mTypeface;    public TypefacedSimpleAdapter(Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to) {        super(context, data, resource, from, to);        mTypeface = Typeface.createFromAsset(context.getAssets(), /* typeface */);    }    @OverrIDe public VIEw getVIEw(int position, VIEw convertVIEw, VIEwGroup parent) {        VIEw vIEw = super.getVIEw(position, convertVIEw, parent);        TextVIEw textvIEw = (TextVIEw) vIEw;        textvIEw.setTypeface(mTypeface);        return textvIEw;    }}

复制粘贴上面的类,并确保根据您的要求设置类型面字段.然后替换当前的SimpleAdapter;即是这样的：

listadapter adapter = new TypefacedSimpleAdapter(AllNotes.this,        noteList, R.layout.List_item, new String[] {        KEY_NOTE_ID, KEY_NOTE_SUBJECT,        KEY_NOTE_DATE }, new int[] {        R.ID.List_lbl_ID, R.ID.List_lbl_subject,        R.ID.List_lbl_date });

请注意,我实际上并没有编译或运行任何此类 *** 作.我会留给你填写任何空白和/或进行更正.

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