1 package com.lixu.letterlistview; 2 3 import java.util.ArrayList; 4 import java.util.List; 5 import org.apache.http.NameValuePair; 6 import org.apache.http.message.BasicNameValuePair; 7 import com.lixu.letterlistview.letter.LetterBaseListAdapter; 8 import com.lixu.letterlistview.letter.LetterListView; 9 import com.lixu.lianxirenlist.R; 10 import android.app.Activity; 11 import android.content.ContentResolver; 12 import android.database.Cursor; 13 import android.graphics.Color; 14 import android.net.Uri; 15 import android.os.Bundle; 16 import android.view.Gravity; 17 import android.view.View; 18 import android.view.ViewGroup; 19 import android.widget.TextView; 20 21 public class MainActivity extends Activity { 22 private ArrayList<String> dataArray; 23 24 @Override 25 protected void onCreate(Bundle savedInstanceState) { 26 super.onCreate(savedInstanceState); 27 setContentView(R.layout.activity_main); 28 // 通过获取手机通讯录的姓名 29 dataArray = new ArrayList<String>(); 30 31 Uri uri = Uri.parse("content://com.android.contacts/contacts"); 32 ContentResolver resolver = this.getContentResolver(); 33 // 给query传递一个SORT_KEY_PRIMARY，让ContentResolver将获得的数据按照联系人名字首字母排序 34 Cursor cursor = resolver.query(uri, null, null, null, 35 android.provider.ContactsContract.Contacts.SORT_KEY_PRIMARY); 36 while (cursor.moveToNext()) 37 38 { 39 // 联系人的id 40 String id = cursor.getString(cursor.getColumnIndex(android.provider.ContactsContract.Contacts._ID)); 41 // 将联系人按姓名首字母分组 42 String sort_key_primary = cursor 43 .getString(cursor.getColumnIndex(android.provider.ContactsContract.Contacts.SORT_KEY_PRIMARY)); 44 // 获取联系人的名字 45 String name = cursor 46 .getString(cursor.getColumnIndex(android.provider.ContactsContract.Contacts.DISPLAY_NAME)); 47 dataArray.add(name); 48 } 49 50 LetterListView letterListView = (LetterListView) findViewById(R.id.letterListView); 51 letterListView.setAdapter(new TestAdapter()); 52 53 } 54 55 /** 56 * 这里 使用一个简单的 NameValuePair 对象,做为测试 57 * 58 * @Title: 59 * @Description: 60 * @Author:Justlcw 61 * @Since:2014-5-13 62 * @Version: 63 */ 64 class TestAdapter extends LetterBaseListAdapter<NameValuePair> { 65 /** 字母对应的key,因为字母是要插入到列表中的,为了区别,所有字母的item都使用同一的key. **/ 66 private static final String LETTER_KEY = "letter"; 67 68 public TestAdapter() { 69 super(); 70 71 List<NameValuePair> dataList = new ArrayList<NameValuePair>(); 72 for (int i = 0; i < dataArray.size(); i++) { 73 NameValuePair pair = new BasicNameValuePair(String.valueOf(i), dataArray.get(i)); 74 dataList.add(pair); 75 } 76 setContainerList(dataList); 77 } 78 79 @Override 80 public Object getItem(int position) { 81 return list.get(position); 82 } 83 84 @Override 85 public long getItemId(int position) { 86 return position; 87 } 88 89 @Override 90 public String getItemString(NameValuePair t) { 91 return t.getValue(); 92 } 93 94 @Override 95 public NameValuePair create(char letter) { 96 return new BasicNameValuePair(LETTER_KEY, String.valueOf(letter)); 97 } 98 99 @Override100 public boolean isLetter(NameValuePair t) {101 // 判断是不是字母行,通过key比较,这里是NameValuePair对象,其他对象,就由你自己决定怎么判断了.102 return t.getName().equals(LETTER_KEY);103 }104 105 @Override106 public View getLetterView(int position, View convertView, ViewGroup parent) {107 // 这里是字母的item界面设置.108 if (convertView == null) {109 convertView = new TextView(MainActivity.this);110 ((TextView) convertView).setGravity(Gravity.CENTER_VERTICAL);111 convertView.setBackgroundColor(getResources().getColor(android.R.color.white));112 }113 ((TextView) convertView).setText(list.get(position).getValue());114 ((TextView) convertView).setBackgroundColor(Color.GREEN);115 ((TextView) convertView).setTextSize(25);116 return convertView;117 }118 119 @Override120 public View getContainerView(int position, View convertView, ViewGroup parent) {121 // 这里是其他正常数据的item界面设置.122 if (convertView == null) {123 convertView = new TextView(MainActivity.this);124 ((TextView) convertView).setGravity(Gravity.CENTER_VERTICAL);125 }126 ((TextView) convertView).setText(list.get(position).getValue());127 ((TextView) convertView).setBackgroundColor(Color.YELLOW);128 ((TextView) convertView).setTextSize(20);129 130 return convertView;131 }132 }133 }
1 package com.lixu.letterlistview.letter; 2 3 import android.widget.BaseAdapter; 4 5 /** 6 * 带有侧边字母列表的listView适配器 7 * 8 *@Title: 9 *@Description:10 *@Author:Justlcw11 *@Since:2014-5-812 *@Version:13 */14 public abstract class LetterBaseAdapter extends BaseAdapter15 {16 /** 字母表头部 **/17 protected static final char HEADER = '+';18 /** 字母表尾部 **/19 protected static final char FOOTER = '#';20 21 /**22 * 是否需要隐藏没有匹配到的字母23 * 24 * @return true 隐藏, false 不隐藏25 * @Description:26 * @Author Justlcw27 * @Date 2014-5-828 */29 public abstract boolean hideLetterNotMatch();30 31 /**32 * 获取字母对应的位置33 * 34 * @return position35 * @Description:36 * @Author Justlcw37 * @Date 2014-5-838 */39 public abstract int getIndex(char letter);40 }
1 package com.lixu.letterlistview.letter; 2 3 import java.util.ArrayList; 4 import java.util.HashMap; 5 import java.util.List; 6 import java.util.Map; 7 import android.text.TextUtils; 8 import android.util.Log; 9 import android.view.View; 10 import android.view.ViewGroup; 11 12 /** 13 * 通用带有字母列表的泛型对象adapter 14 * 15 * @Title: 16 * @Description: 17 * @Author:Justlcw 18 * @Since:2014-5-9 19 * @Version: 20 */ 21 public abstract class LetterBaseListAdapter<T> extends LetterBaseAdapter { 22 /** log tag. **/ 23 private static final String TAG = "LetterBaseListAdapter"; 24 25 /** 默认错误头部字母. **/ 26 private static final char ERROR_LETTER = ' '; 27 28 /** view type的类型总数 **/ 29 private static final int TYPE_COUNT = 2; 30 /** 字母类型 **/ 31 private static final int TYPE_LETTER = 0; 32 /** 实体类型 **/ 33 private static final int TYPE_CONTAINER = 1; 34 35 /** 添加字母之后的list **/ 36 protected final List<T> list; 37 /** 字母头位置标示map **/ 38 private final Map<Character, Integer> letterMap; 39 40 /** 41 * 构造方法 42 */ 43 public LetterBaseListAdapter() { 44 list = new ArrayList<T>(); 45 letterMap = new HashMap<Character, Integer>(); 46 } 47 48 /** 49 * 构造方法 50 * 51 * @param dataArray 52 * 内容数组 53 */ 54 public LetterBaseListAdapter(T[] dataArray) { 55 this(); 56 setContainerList(dataArray); 57 } 58 59 /** 60 * 构造方法 61 * 62 * @param dataList 63 * 内容列表 64 */ 65 public LetterBaseListAdapter(List<T> dataList) { 66 this(); 67 setContainerList(dataList); 68 } 69 70 /** 71 * 设置主体内容 72 * 73 * @param dataArray 74 * 实体数组 75 * @Description: 76 * @Author Justlcw 77 * @Date 2014-5-9 78 */ 79 protected final void setContainerList(T[] dataArray) { 80 if (!list.isEmpty()) { 81 list.clear(); 82 } 83 if (!letterMap.isEmpty()) { 84 letterMap.clear(); 85 } 86 87 char letter = ERROR_LETTER; 88 int index = 0; 89 for (int i = 0; i < dataArray.length; i++) { 90 T t = dataArray[i]; 91 92 char l = getHeaderLetter(t); 93 94 if (letter != l && l != ERROR_LETTER) { 95 // 如果发现这个字母没有添加过,更新一下标示 96 letter = l; 97 // 创建一个T类型的字母头放进去 98 T tl = create(letter); 99 if (tl != null) {100 // 如果创建成功,则插入到列表中101 list.add(tl);102 }103 // 存放最新字母对应的位置104 letterMap.put(letter, index);105 index++;106 }107 // 添加原本的填充实体项108 list.add(t);109 index++;110 }111 }112 113 /**114 * 设置主体内容.115 * 116 * @param dataList117 * 实体列表118 * @Description:119 * @Author Justlcw120 * @Date 2014-5-9121 */122 protected final void setContainerList(List<T> dataList) {123 if (!list.isEmpty()) {124 list.clear();125 }126 if (!letterMap.isEmpty()) {127 letterMap.clear();128 }129 130 char letter = ' ';131 int index = 0;132 for (int i = 0; i < dataList.size(); i++) {133 T t = dataList.get(i);134 135 char l = getHeaderLetter(t);136 137 if (letter != l && l != ERROR_LETTER) {138 // 如果发现这个字母没有添加过,更新一下标示139 letter = l;140 // 创建一个T类型的字母头放进去141 T tl = create(letter);142 if (tl != null) {143 // 如果创建成功,则插入到列表中144 list.add(tl);145 }146 // 存放最新字母对应的位置147 letterMap.put(letter, index);148 index++;149 }150 // 添加原本的填充实体项151 list.add(t);152 index++;153 }154 }155 156 /**157 * @param t158 * <实体item对象>159 * 160 * @return <实体item对象> 首字母, 获取失败返回 {@link #ERROR_LETTER}161 * @Description:162 * @Author Justlcw163 * @Date 2014-5-12164 */165 private char getHeaderLetter(T t) {166 // 获取item对应的字符串167 String str = getItemString(t);168 // 如果为空,跳出继续169 if (TextUtils.isEmpty(str)) {170 Log.e(TAG, "item string empty in " + t.toString());171 return ERROR_LETTER;172 }173 char l;174 // 获取第一个字母175 char firstChar = str.charAt(0);176 if (firstChar == HEADER || firstChar == FOOTER || LetterUtil.isLetter(firstChar)) {177 l = firstChar;// 如果是头,尾,字母,直接赋值178 } else {179 String[] letterArray = LetterUtil.getFirstPinyin(firstChar);180 // 如果是汉字,取拼音首字母181 if (letterArray != null && letterArray.length > 0) {182 l = letterArray[0].charAt(0);183 } else {184 // 如果汉字转拼音失败了,跳过185 Log.e(TAG, firstChar + " turn to letter fail, " + t.toString());186 return ERROR_LETTER;187 }188 }189 190 // 如果是小写字母,转换为大写字母191 if (l >= 'a') {192 l = (char) (l - 32);193 }194 return l;195 }196 197 @Override198 public final int getCount() {199 return list.size();200 }201 202 @Override203 public final View getView(int position, View convertView, ViewGroup parent) {204 if (getItemViewType(position) == TYPE_LETTER) {205 return getLetterView(position, convertView, parent);206 }207 return getContainerView(position, convertView, parent);208 }209 210 @Override211 public final int getItemViewType(int position) {212 if (isLetter(list.get(position))) {213 return TYPE_LETTER;214 }215 return TYPE_CONTAINER;216 }217 218 @Override219 public final int getViewTypeCount() {220 return TYPE_COUNT;221 }222 223 @Override224 public boolean hideLetterNotMatch() {225 return false;226 }227 228 @Override229 public final int getIndex(char letter) {230 Integer index = letterMap.get(letter);231 if (index == null) {232 return -1;233 }234 return index;235 }236 237 /**238 * @param T239 * <实体item对象>240 * 241 * @return <实体item对象>对应的String,用来获取<拼音首字母>242 * @Description:243 * @Author Justlcw244 * @Date 2014-5-9245 */246 public abstract String getItemString(T t);247 248 /**249 * @param letter250 * <字母>251 * 252 * @return 根据<字母>创建一个<实体item对象>,用来显示<字母item>253 * @Description:254 * @Author Justlcw255 * @Date 2014-5-9256 */257 public abstract T create(char letter);258 259 /**260 * @param t261 * <实体item对象>262 * 263 * @return 根据<实体item对象>,判断是否是<字母item>264 * @Description:265 * @Author Justlcw266 * @Date 2014-5-9267 */268 public abstract boolean isLetter(T t);269 270 /**271 * 返回 <字母item>界面,其他的同272 * <P>273 * {@link #getView(int, View, ViewGroup)}274 * 275 * @Description:276 * @Author Justlcw277 * @Date 2014-5-9278 */279 public abstract View getLetterView(int position, View convertView, ViewGroup parent);280 281 /**282 * 返回<实体item>界面,其他的同283 * <P>284 * {@link #getView(int, View, ViewGroup)}285 * 286 * @Description:287 * @Author Justlcw288 * @Date 2014-5-9289 */290 public abstract View getContainerView(int position, View convertView, ViewGroup parent);291 }
1 package com.lixu.letterlistview.letter; 2 3 import java.lang.ref.SoftReference; 4 import java.util.ArrayList; 5 import java.util.List; 6 7 import com.lixu.lianxirenlist.R; 8 import android.content.Context; 9 import android.os.Handler; 10 import android.os.Message; 11 import android.util.AttributeSet; 12 import android.view.Gravity; 13 import android.view.LayoutInflater; 14 import android.view.MotionEvent; 15 import android.view.View; 16 import android.view.ViewGroup; 17 import android.widget.AbsListView; 18 import android.widget.BaseAdapter; 19 import android.widget.FrameLayout; 20 import android.widget.ListView; 21 import android.widget.TextView; 22 import android.widget.AdapterView.OnItemClickListener; 23 24 /** 25 * 带有字母列表的listView 26 * 27 * @Title: 28 * @Description: 29 * @Author:Justlcw 30 * @Since:2014-5-7 31 * @Version: 32 */ 33 public class LetterListView extends FrameLayout { 34 /** 隐藏字母消息 **/ 35 private final int MSG_HIDE_LETTER = 0x0; 36 37 /** 字母列表的宽度 **/ 38 private final int LETTER_LIST_VIEW_WIDTH = 50;// TODO 这里宽度写死了,按着一定的比例比较好 39 40 /** 内容列表 **/ 41 private ListView mListView; 42 /** 内容列表适配器 **/ 43 private LetterBaseAdapter mAdapter; 44 45 /** 字母列表 **/ 46 private ListView mLetterListView; 47 private LetterAdapter mLetterAdapter; 48 49 private TextView mLetterTextView; 50 51 /** 字母消息Handler **/ 52 private Handler mLetterhandler; 53 54 /** 55 * 构造方法 56 * 57 * @param context 58 */ 59 public LetterListView(Context context) { 60 super(context); 61 initListView(context); 62 } 63 64 /** 65 * 构造方法 66 * 67 * @param context 68 * @param attrs 69 */ 70 public LetterListView(Context context, AttributeSet attrs) { 71 super(context, attrs); 72 initListView(context); 73 } 74 75 /** 76 * 初始化 内容列表 字母列表 77 * 78 * @Description: 79 * @Author Justlcw 80 * @Date 2014-5-7 81 */ 82 private void initListView(Context context) { 83 LayoutInflater inflater = LayoutInflater.from(getContext()); 84 // TODO 这里添加内容列表,可以在这里对ListView进行一些你想要的设置 85 mListView = (ListView) inflater.inflate(R.layout.letter_list_container, null, false); 86 LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); 87 addView(mListView, lp); 88 89 // TODO 这里添加字母列表,可以在这里对ListView进行一些你想要的设置 90 mLetterListView = (ListView) inflater.inflate(R.layout.letter_list_letter, null, false); 91 mLetterListView.setOnTouchListener(mLetterOnTouchListener); 92 LayoutParams letterListLp = new LayoutParams(LETTER_LIST_VIEW_WIDTH, LayoutParams.MATCH_PARENT, Gravity.RIGHT); 93 addView(mLetterListView, letterListLp); 94 95 // TODO 这里对显示的字母进行设置 96 mLetterTextView = (TextView) inflater.inflate(R.layout.letter_list_position, null, false); 97 LayoutParams letterLp = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, Gravity.CENTER); 98 addView(mLetterTextView, letterLp); 99 mLetterTextView.setVisibility(View.INVISIBLE);100 101 // 初始化letter消息发送者102 mLetterhandler = new LetterHandler(this);103 }104 105 /**106 * 设置内容列表适配器107 * 108 * @param adapter109 * {@link LetterBaseAdapter}110 * @Description:111 * @Author Justlcw112 * @Date 2014-5-7113 */114 public void setAdapter(LetterBaseAdapter adapter) {115 if (adapter != null) {116 mAdapter = adapter;117 mListView.setAdapter(mAdapter);118 }119 }120 121 /**122 * {@link AbsListView#setOnItemClickListener(OnItemClickListener)}123 * 124 * @Description:125 * @Author Justlcw126 * @Date 2014-5-14127 */128 public void setOnItemClickListener(OnItemClickListener onItemClickListener) {129 mListView.setOnItemClickListener(onItemClickListener);130 }131 132 @Override133 protected void onSizeChanged(int w, int h, int oldw, int oldh) {134 super.onSizeChanged(w, h, oldw, oldh);135 136 mLetterAdapter = new LetterAdapter(h - getPaddingTop() - getPaddingBottom());137 mLetterListView.setAdapter(mLetterAdapter);138 }139 140 /**141 * 显示字母142 * 143 * @Description:144 * @Author Justlcw145 * @Date 2014-5-8146 */147 private void showLetter(String letter) {148 if (mLetterTextView.getVisibility() != View.VISIBLE) {149 mLetterTextView.setVisibility(View.VISIBLE);150 mLetterListView.setBackgroundResource(android.R.color.darker_gray);151 }152 mLetterTextView.setText(letter);153 154 mLetterhandler.removeMessages(MSG_HIDE_LETTER);155 mLetterhandler.sendEmptyMessageDelayed(MSG_HIDE_LETTER, 500);156 }157 158 /**159 * 处理消息 {@link LetterHandler#handleMessage(Message)}160 * 161 * @param msg162 * 消息163 * @Description:164 * @Author Justlcw165 * @Date 2014-5-8166 */167 private void handleLetterMessage(Message msg) {168 mLetterTextView.setVisibility(View.INVISIBLE);169 mLetterListView.setBackgroundResource(android.R.color.white);170 }171 172 /** 字母栏touch事件 **/173 private View.OnTouchListener mLetterOnTouchListener = new View.OnTouchListener() {174 @Override175 public boolean onTouch(View v, MotionEvent event) {176 int height = (int) event.getY() - v.getTop();177 178 int position = mLetterAdapter.getTouchPoistion(height);179 if (position >= 0) {180 char letter = (Character) mLetterAdapter.getItem(position);181 // 显示字母182 showLetter(String.valueOf(letter));183 184 // 显示到字母对应的位置185 int select = mAdapter.getIndex(letter);186 if (select >= 0) {187 mListView.setSelection(select);188 }189 return true;190 }191 return false;192 }193 };194 195 /**196 * 字母列表设配器197 * 198 * @Title:199 * @Description:200 * @Author:Justlcw201 * @Since:2014-5-7202 * @Version:203 */204 private class LetterAdapter extends BaseAdapter {205 /** 字母表 **/206 private static final String LETTER_STR = "+ABCDEFGHIJKLMNOPQRSTUVWXYZ#";207 /** 最终显示的字母array **/208 private char[] letterArray;209 /** 每个字母的高度 **/210 private int itemHeight;211 212 /**213 * 构造方法214 * 215 * @param height216 * view height217 */218 public LetterAdapter(int height) {219 if (mAdapter.hideLetterNotMatch()) {220 List<Character> list = new ArrayList<Character>();221 char[] allArray = LETTER_STR.toCharArray();222 for (int i = 0; i < allArray.length; i++) {223 char letter = allArray[i];224 int position = mAdapter.getIndex(letter);225 if (position >= 0) {226 list.add(letter);227 }228 }229 letterArray = new char[list.size()];230 for (int i = 0; i < list.size(); i++) {231 letterArray[i] = list.get(i);232 }233 list.clear();234 list = null;235 } else {236 letterArray = LETTER_STR.toCharArray();237 }238 itemHeight = height / letterArray.length;239 }240 241 @Override242 public int getCount() {243 return letterArray.length;244 }245 246 @Override247 public Object getItem(int position) {248 return letterArray[position];249 }250 251 @Override252 public long getItemId(int position) {253 return position;254 }255 256 @Override257 public View getView(int position, View convertView, ViewGroup parent) {258 if (convertView == null) {259 convertView = new TextView(getContext());260 ((TextView) convertView).setTextColor(getResources().getColor(android.R.color.black));261 ((TextView) convertView).setGravity(Gravity.CENTER);262 AbsListView.LayoutParams lp = new AbsListView.LayoutParams(AbsListView.LayoutParams.MATCH_PARENT,263 itemHeight);264 convertView.setLayoutParams(lp);265 }266 ((TextView) convertView).setText(String.valueOf(letterArray[position]));267 268 return convertView;269 }270 271 /**272 * 获取touch的位置273 * 274 * @return position275 * @Description:276 * @Author Justlcw277 * @Date 2014-5-8278 */279 public int getTouchPoistion(int touchHeight) {280 int position = touchHeight / itemHeight;281 if (position >= 0 && position < getCount()) {282 return position;283 }284 return -1;285 }286 }287 288 /**289 * 处理字母显示的handler.290 * 291 * @Title:292 * @Description:293 * @Author:Justlcw294 * @Since:2014-5-8295 * @Version:296 */297 private static class LetterHandler extends Handler {298 /** 弱引用 {@link LetterListView} **/299 private SoftReference<LetterListView> srLetterListView;300 301 /**302 * 构造方法303 * 304 * @param letterListView305 * {@link LetterListView}306 */307 public LetterHandler(LetterListView letterListView) {308 srLetterListView = new SoftReference<LetterListView>(letterListView);309 }310 311 @Override312 public void handleMessage(Message msg) {313 LetterListView letterListView = srLetterListView.get();314 // 如果view没有被销毁掉,交给view处理这个消息315 if (letterListView != null) {316 letterListView.handleLetterMessage(msg);317 }318 }319 }320 }
1 package com.lixu.letterlistview.letter; 2 3 import net.sourceforge.pinyin4j.PinyinHelper; 4 5 6 /** 7 * 字母工具类 8 *@Title: 9 *@Description:10 *@Author:Justlcw11 *@Since:2014-5-812 *@Version:13 */14 public class LetterUtil15 {16 /**17 * @param chinese 一个汉字18 * @return 拼音首字母19 * @Description:20 * @Author Justlcw21 * @Date 2014-5-822 */23 public static String[] getFirstPinyin(char chinese)24 {25 return PinyinHelper.toHanyuPinyinStringArray(chinese);26 }27 28 /**29 * 是否是字母30 * 31 * @return true 字母,false 非字母32 * @Description:33 * @Author Justlcw34 * @Date 2014-5-835 */36 public static boolean isLetter(char c)37 {38 return (c >= 65 && c <= 90) || (c >= 97 && c <= 112);39 }40 }
xml文件：
1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" > 5 6 <com.lixu.letterlistview.letter.LetterListView 7 android:id="@+id/letterListView" 8 android:layout_width="match_parent" 9 android:layout_height="match_parent" >10 </com.lixu.letterlistview.letter.LetterListView>11 12 </RelativeLayout>
1 <?xml version="1.0" encoding="utf-8"?>2 <ListView xmlns:android="http://schemas.android.com/apk/res/android"3 android:layout_width="match_parent"4 android:layout_height="match_parent"5 android:cacheColorHint="@android:color/transparent"6 android:divider="@android:color/transparent"7 android:dividerHeight="0dp"8 android:scrollbars="none" />
1 <?xml version="1.0" encoding="utf-8"?>2 <ListView xmlns:android="http://schemas.android.com/apk/res/android"3 android:layout_width="match_parent"4 android:layout_height="match_parent"5 android:background="#f44336"6 android:cacheColorHint="@android:color/transparent"7 android:divider="@android:color/transparent"8 android:dividerHeight="0dp"9 android:scrollbars="none" />
1 <?xml version="1.0" encoding="utf-8"?> 2 <TextView xmlns:android="http://schemas.android.com/apk/res/android" 3 android:layout_width="wrap_content" 4 android:layout_height="wrap_content" 5 android:background="#f44336" 6 android:gravity="center" 7 android:maxWidth="70dip" 8 android:minWidth="70dip" 9 android:padding="10dip"10 android:textColor="@android:color/black"11 android:textSize="50sp" />
运行效果图：