Android聊天软件的开发(四)--通讯录
2014-06-19 22:07
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一，好友排序
好友排序是按照昵称拼音进行A-Z排序。效果如下图：
对好友昵称进行排序，需要先将首字转换为ASCII码，然后根据ASCII码得到对应的拼音，最后根据拼音进行A-Z排序。点击按压右边的字母栏，会同步更新列表显示，并且显示当前点击的字母。
代码实现：
1. ContactsModel:好友列表实体。其中，如果用户昵称为成龙，则sortLetter为C，sortPinyin为CHEN。
另外，photo(头像)属性由于是以String类型在客户端与服务器之间传输，而在客户端显示需要Drawable类型，所以photo要在String和Drawable之间转换。
public class ContactsModel{
/**昵称首汉字的拼音首字母。用于显示*/
private String sortLetter;
/**昵称首汉字的全拼音。用于排序*/
private String sortPinyin;
private String userId;
private String name;
private String gender;
private Drawable photo;
public Drawable getPhoto() {
return photo;
}
public void setPhoto(Drawable photo) {
this.photo = photo;
}
public void setPhoto(String photo) {
this.photo = ViewUtils.StringToDrawable(photo);
}
//...
}String和Drawable转换类
public class ViewUtils {
/**
* 将照片存储为字符串形式(经过BASE64编码)
*/
public static String DrawableToString(Drawable drawable) {
if(drawable == null)
{
return "";
}
BitmapDrawable bd = (BitmapDrawable)drawable;
Bitmap bmp = bd.getBitmap();
if(bmp == null)
return "";
ByteArrayOutputStream stream = new ByteArrayOutputStream();
//压缩图片
bmp.compress(Bitmap.CompressFormat.PNG, 60, stream);
byte[] b = stream.toByteArray();
// Base64Coder编码，将图片流以字符串形式存储下来
return Base64Coder.encodeLines(b);
}
/**
* 将Base64Coder编码后的字符串转换为Drawable
*/
public static Drawable StringToDrawable(String encodeStr) {
if(encodeStr==null || encodeStr.isEmpty())
{
return null;
}
//Base64Coder解码
ByteArrayInputStream in = new ByteArrayInputStream(Base64Coder.decodeLines(encodeStr));
Bitmap dBitmap = BitmapFactory.decodeStream(in);
Drawable drawable = new BitmapDrawable(dBitmap);
return drawable;
}
}其中，Base64Coder不是SDK库函数，可以在 http://www.source-code.biz/base64coder/java/ 获得。
2. SideBar：自定义View，右侧字母索引。setTextView用于设置显示字母的TextView，比如上图的S字母框(该TextView的显示和隐藏已在内部实现，无需调用者操作)。setOnTouchingLetterChangedListener用于设置按压字母的回调函数，在OnTouchingLetterChangedListener函数中处理相应操作，如更新ListView显示。
public class SideBar extends View {
/**触摸事件*/
private OnTouchingLetterChangedListener mOnTouchingLetterChangedListener;
/**26个字母*/
public static String[] mLetters = { "A", "B", "C", "D", "E", "F", "G", "H", "I",
"J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V",
"W", "X", "Y", "Z", "#" };
/**是否按压状态*/
private boolean mIsPress;
/**选中字母位置*/
private int mChoose = -1;
private Paint mPaint = new Paint();
private TextView mTextDialog;
public SideBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setBackgroundDrawable(new ColorDrawable(0xFFFFFFFF));
}
public SideBar(Context context, AttributeSet attrs) {
super(context, attrs);
setBackgroundDrawable(new ColorDrawable(0xFFFFFFFF));
}
public SideBar(Context context) {
super(context);
setBackgroundDrawable(new ColorDrawable(0xFFFFFFFF));
}
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// 获取焦点改变背景颜色.
int height = getHeight();// 获取对应高度
int width = getWidth(); // 获取对应宽度
int singleHeight = height / mLetters.length;// 获取每一个字母的高度
if(mIsPress)//处于按压态
{
for (int i = 0; i < mLetters.length; i++) {
//字体改为黑色粗体
mPaint.setColor(Color.parseColor("#000000"));
mPaint.setTypeface(Typeface.DEFAULT_BOLD);
mPaint.setAntiAlias(true);
mPaint.setTextSize(18);
// 选中的状态
if (i == mChoose) {
mPaint.setColor(Color.parseColor("#FFFFFF"));
mPaint.setFakeBoldText(true);
}
// x坐标等于中间-字符串宽度的一半.
float xPos = width / 2 - mPaint.measureText(mLetters[i]) / 2;
float yPos = singleHeight * i + singleHeight;
canvas.drawText(mLetters[i], xPos, yPos, mPaint);
mPaint.reset();// 重置画笔
}
}else//正常状态
{
for (int i = 0; i < mLetters.length; i++) {
mPaint.setColor(Color.parseColor("#E0E0E0"));
mPaint.setTypeface(Typeface.DEFAULT);
mPaint.setAntiAlias(true);
mPaint.setTextSize(16);
// x坐标等于中间-字符串宽度的一半.
float xPos = width / 2 - mPaint.measureText(mLetters[i]) / 2;
float yPos = singleHeight * i + singleHeight;
canvas.drawText(mLetters[i], xPos, yPos, mPaint);
mPaint.reset();// 重置画笔
}
}
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
final int action = event.getAction();
final float y = event.getY();// 点击y坐标
final int oldChoose = mChoose;
final OnTouchingLetterChangedListener listener = mOnTouchingLetterChangedListener;
// 点击y坐标所占总高度的比例*mLetters数组的长度就等于点击mLetters中的个数.
final int c = (int) (y / getHeight() * mLetters.length);
switch (action) {
case MotionEvent.ACTION_UP:
setBackgroundDrawable(new ColorDrawable(0xFFFFFFFF));
mChoose = -1;//
mIsPress = false;
invalidate();
if (mTextDialog != null) {
//隐藏字母
mTextDialog.setVisibility(View.GONE);
}
break;
default:
setBackgroundResource(R.drawable.sidebar_background);
if (oldChoose != c) {
if (c >= 0 && c < mLetters.length) {
if (listener != null) {
listener.onTouchingLetterChanged(mLetters[c]);
}
if (mTextDialog != null) {
//显示字母
mTextDialog.setText(mLetters[c]);
mTextDialog.setVisibility(View.VISIBLE);
}
mChoose = c;
mIsPress = true;
invalidate();
}
}
break;
}
return true;
}
/**设置用于显示当前字母的TextView*/
public void setTextView(TextView mTextDialog) {
this.mTextDialog = mTextDialog;
}
/**
* 设置按压监听
*/
public void setOnTouchingLetterChangedListener(
OnTouchingLetterChangedListener onTouchingLetterChangedListener) {
this.mOnTouchingLetterChangedListener = onTouchingLetterChangedListener;
}
public interface OnTouchingLetterChangedListener {
public void onTouchingLetterChanged(String s);
}
}3. CharacterParser：汉字转拼音类。需要先将汉字转换为ASCII码，然后得到对应的拼音。此处的拼音为无声调的拼音。
public class CharacterParser {
private static int[] pyvalue = new int[] {-20319, -20317, -20304, -20295, -20292, -20283, -20265, -20257, -20242, -20230, -20051, -20036, -20032,
-20026, -20002, -19990, -19986, -19982, -19976, -19805, -19784, -19775, -19774, -19763, -19756, -19751, -19746, -19741, -19739, -19728,
-19725, -19715, -19540, -19531, -19525, -19515, -19500, -19484, -19479, -19467, -19289, -19288, -19281, -19275, -19270, -19263, -19261,
-19249, -19243, -19242, -19238, -19235, -19227, -19224, -19218, -19212, -19038, -19023, -19018, -19006, -19003, -18996, -18977, -18961,
-18952, -18783, -18774, -18773, -18763, -18756, -18741, -18735, -18731, -18722, -18710, -18697, -18696, -18526, -18518, -18501, -18490,
-18478, -18463, -18448, -18447, -18446, -18239, -18237, -18231, -18220, -18211, -18201, -18184, -18183, -18181, -18012, -17997, -17988,
-17970, -17964, -17961, -17950, -17947, -17931, -17928, -17922, -17759, -17752, -17733, -17730, -17721, -17703, -17701, -17697, -17692,
-17683, -17676, -17496, -17487, -17482, -17468, -17454, -17433, -17427, -17417, -17202, -17185, -16983, -16970, -16942, -16915, -16733,
-16708, -16706, -16689, -16664, -16657, -16647, -16474, -16470, -16465, -16459, -16452, -16448, -16433, -16429, -16427, -16423, -16419,
-16412, -16407, -16403, -16401, -16393, -16220, -16216, -16212, -16205, -16202, -16187, -16180, -16171, -16169, -16158, -16155, -15959,
-15958, -15944, -15933, -15920, -15915, -15903, -15889, -15878, -15707, -15701, -15681, -15667, -15661, -15659, -15652, -15640, -15631,
-15625, -15454, -15448, -15436, -15435, -15419, -15416, -15408, -15394, -15385, -15377, -15375, -15369, -15363, -15362, -15183, -15180,
-15165, -15158, -15153, -15150, -15149, -15144, -15143, -15141, -15140, -15139, -15128, -15121, -15119, -15117, -15110, -15109, -14941,
-14937, -14933, -14930, -14929, -14928, -14926, -14922, -14921, -14914, -14908, -14902, -14894, -14889, -14882, -14873, -14871, -14857,
-14678, -14674, -14670, -14668, -14663, -14654, -14645, -14630, -14594, -14429, -14407, -14399, -14384, -14379, -14368, -14355, -14353,
-14345, -14170, -14159, -14151, -14149, -14145, -14140, -14137, -14135, -14125, -14123, -14122, -14112, -14109, -14099, -14097, -14094,
-14092, -14090, -14087, -14083, -13917, -13914, -13910, -13907, -13906, -13905, -13896, -13894, -13878, -13870, -13859, -13847, -13831,
-13658, -13611, -13601, -13406, -13404, -13400, -13398, -13395, -13391, -13387, -13383, -13367, -13359, -13356, -13343, -13340, -13329,
-13326, -13318, -13147, -13138, -13120, -13107, -13096, -13095, -13091, -13076, -13068, -13063, -13060, -12888, -12875, -12871, -12860,
-12858, -12852, -12849, -12838, -12831, -12829, -12812, -12802, -12607, -12597, -12594, -12585, -12556, -12359, -12346, -12320, -12300,
-12120, -12099, -12089, -12074, -12067, -12058, -12039, -11867, -11861, -11847, -11831, -11798, -11781, -11604, -11589, -11536, -11358,
-11340, -11339, -11324, -11303, -11097, -11077, -11067, -11055, -11052, -11045, -11041, -11038, -11024, -11020, -11019, -11018, -11014,
-10838, -10832, -10815, -10800, -10790, -10780, -10764, -10587, -10544, -10533, -10519, -10331, -10329, -10328, -10322, -10315, -10309,
-10307, -10296, -10281, -10274, -10270, -10262, -10260, -10256, -10254};
public static String[] pystr = new String[] {"a", "ai", "an", "ang", "ao", "ba", "bai", "ban", "bang", "bao", "bei", "ben", "beng", "bi", "bian",
"biao", "bie", "bin", "bing", "bo", "bu", "ca", "cai", "can", "cang", "cao", "ce", "ceng", "cha", "chai", "chan", "chang", "chao", "che",
"chen", "cheng", "chi", "chong", "chou", "chu", "chuai", "chuan", "chuang", "chui", "chun", "chuo", "ci", "cong", "cou", "cu", "cuan",
"cui", "cun", "cuo", "da", "dai", "dan", "dang", "dao", "de", "deng", "di", "dian", "diao", "die", "ding", "diu", "dong", "dou", "du",
"duan", "dui", "dun", "duo", "e", "en", "er", "fa", "fan", "fang", "fei", "fen", "feng", "fo", "fou", "fu", "ga", "gai", "gan", "gang",
"gao", "ge", "gei", "gen", "geng", "gong", "gou", "gu", "gua", "guai", "guan", "guang", "gui", "gun", "guo", "ha", "hai", "han", "hang",
"hao", "he", "hei", "hen", "heng", "hong", "hou", "hu", "hua", "huai", "huan", "huang", "hui", "hun", "huo", "ji", "jia", "jian",
"jiang", "jiao", "jie", "jin", "jing", "jiong", "jiu", "ju", "juan", "jue", "jun", "ka", "kai", "kan", "kang", "kao", "ke", "ken",
"keng", "kong", "kou", "ku", "kua", "kuai", "kuan", "kuang", "kui", "kun", "kuo", "la", "lai", "lan", "lang", "lao", "le", "lei", "leng",
"li", "lia", "lian", "liang", "liao", "lie", "lin", "ling", "liu", "long", "lou", "lu", "lv", "luan", "lue", "lun", "luo", "ma", "mai",
"man", "mang", "mao", "me", "mei", "men", "meng", "mi", "mian", "miao", "mie", "min", "ming", "miu", "mo", "mou", "mu", "na", "nai",
"nan", "nang", "nao", "ne", "nei", "nen", "neng", "ni", "nian", "niang", "niao", "nie", "nin", "ning", "niu", "nong", "nu", "nv", "nuan",
"nue", "nuo", "o", "ou", "pa", "pai", "pan", "pang", "pao", "pei", "pen", "peng", "pi", "pian", "piao", "pie", "pin", "ping", "po", "pu",
"qi", "qia", "qian", "qiang", "qiao", "qie", "qin", "qing", "qiong", "qiu", "qu", "quan", "que", "qun", "ran", "rang", "rao", "re",
"ren", "reng", "ri", "rong", "rou", "ru", "ruan", "rui", "run", "ruo", "sa", "sai", "san", "sang", "sao", "se", "sen", "seng", "sha",
"shai", "shan", "shang", "shao", "she", "shen", "sheng", "shi", "shou", "shu", "shua", "shuai", "shuan", "shuang", "shui", "shun",
"shuo", "si", "song", "sou", "su", "suan", "sui", "sun", "suo", "ta", "tai", "tan", "tang", "tao", "te", "teng", "ti", "tian", "tiao",
"tie", "ting", "tong", "tou", "tu", "tuan", "tui", "tun", "tuo", "wa", "wai", "wan", "wang", "wei", "wen", "weng", "wo", "wu", "xi",
"xia", "xian", "xiang", "xiao", "xie", "xin", "xing", "xiong", "xiu", "xu", "xuan", "xue", "xun", "ya", "yan", "yang", "yao", "ye", "yi",
"yin", "ying", "yo", "yong", "you", "yu", "yuan", "yue", "yun", "za", "zai", "zan", "zang", "zao", "ze", "zei", "zen", "zeng", "zha",
"zhai", "zhan", "zhang", "zhao", "zhe", "zhen", "zheng", "zhi", "zhong", "zhou", "zhu", "zhua", "zhuai", "zhuan", "zhuang", "zhui",
"zhun", "zhuo", "zi", "zong", "zou", "zu", "zuan", "zui", "zun", "zuo"};
private static CharacterParser characterParser = new CharacterParser();
public static CharacterParser getInstance() {
return characterParser;
}
/** * 汉字转成ASCII码 */
private int getChsAscii(String chs) {
int asc = 0;
try {
byte[] bytes = chs.getBytes("gb2312");
if (bytes == null || bytes.length > 2 || bytes.length <= 0) {
throw new RuntimeException("illegal resource string");
}
if (bytes.length == 1) { // 英文字符
asc = bytes[0];
}
if (bytes.length == 2) {// 中文字符
int hightByte = 256 + bytes[0];
int lowByte = 256 + bytes[1];
asc = (256 * hightByte + lowByte) - 256 * 256;
}
} catch (Exception e) {
e.printStackTrace();
}
return asc;
}
/** * 单字解析 */
public String convert(String str) {
String result = null;
int ascii = getChsAscii(str);
if (ascii > 0 && ascii < 160) {
result = String.valueOf((char) ascii);
} else {
for (int i = (pyvalue.length - 1); i >= 0; i--) {
if (pyvalue[i] <= ascii) {
result = pystr[i];
break;
}
}
}
return result;
}
/** * 词组解析 */
public String getSelling(String chs) {
String key, value;
StringBuilder sb = new StringBuilder();
for (int i = 0; i < chs.length(); i++) {
key = chs.substring(i, i + 1);
if (key.getBytes().length >= 2) {
value = (String) convert(key);
if (value == null) {
value = "unknown";
}
} else {
value = key;
}
sb.append(value);
}
return sb.toString();
}
}4. ContactsAdapter：好友列表适配器。
下图，标题字母L与林丹属于同一个Item，李宗伟这个item是将标题字母的TextView隐藏了。
这里的显示隐藏逻辑为：(假设只有林丹和李宗伟这两个好友)
林丹item：通过getSectionForPosition(0)得到sortLetter的ASCII码值为76(即L的ASCII码)，然后通过getPositionForSection(76)得到sortLetter为L的item第一次出现的位置为0。由于林丹item当前position == 0，所以显示标题字母。
李宗伟item：通过getSectionForPosition(1)得到sortLetter的ASCII码值为76(即L的ASCII码)，然后通过getPositionForSection(76)得到sortLetter为L的item第一次出现的位置为0。由于李宗伟item当前position
= 1 != 0，所以隐藏标题字母。
public class ContactsAdapter extends BaseAdapter implements SectionIndexer{
private List<ContactsModel> list = null;
private Context mContext;
public ContactsAdapter(Context mContext, List<ContactsModel> list) {
this.mContext = mContext;
this.list = list;
}
/**
* 当ListView数据发生变化时,调用此方法来更新ListView
*/
public void updateListView(List<ContactsModel> list){
this.list = list;
notifyDataSetChanged();
}
public int getCount() {
return this.list.size();
}
public Object getItem(int position) {
return list.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View view, ViewGroup arg2) {
ViewHolder viewHolder = null;
final ContactsModel contactsModel = list.get(position);
if (view == null) {
viewHolder = new ViewHolder();
view = LayoutInflater.from(mContext).inflate(R.layout.listview_item_contacts, null);
viewHolder.tvTitleLayout = (LinearLayout) view.findViewById(R.id.contacts_catalogLayout);
viewHolder.tvLetter = (TextView) view.findViewById(R.id.contacts_catalog);
viewHolder.tvPhoto = (ImageView) view.findViewById(R.id.contacts_photo);
viewHolder.tvName = (TextView) view.findViewById(R.id.contacts_friend);
view.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) view.getTag();
}
//根据position获取分类的首字母的Char ascii值
int section = getSectionForPosition(position);
//如果当前位置等于该分类首字母的Char的位置 ，则认为是第一次出现
if(position == getPositionForSection(section)){
viewHolder.tvTitleLayout.setVisibility(View.VISIBLE);
viewHolder.tvLetter.setText(contactsModel.getSortLetter());
}else{
viewHolder.tvTitleLayout.setVisibility(View.GONE);
}
Drawable drawable = contactsModel.getPhoto();
if(drawable != null)
{
viewHolder.tvPhoto.setImageDrawable(drawable);
}
else
{
viewHolder.tvPhoto.setImageDrawable(mContext.getResources().getDrawable(R.drawable.photo_default));
}
viewHolder.tvName.setText(contactsModel.getName());
return view;
}
final static class ViewHolder {
LinearLayout tvTitleLayout;
TextView tvLetter;
ImageView tvPhoto;
TextView tvName;
}
/**
* 根据ListView的当前位置获取分类的首字母的Char ascii值
*/
@Override
public int getSectionForPosition(int position) {
return list.get(position).getSortLetter().charAt(0);
}
/**
* 根据分类的首字母的Char ascii值获取其第一次出现该首字母的位置
*/
@Override
public int getPositionForSection(int section) {
for (int i = 0; i < getCount(); i++) {
String sortStr = list.get(i).getSortLetter();
char firstChar = sortStr.toUpperCase().charAt(0);
if (firstChar == section) {
return i;
}
}
return -1;
}
@Override
public Object[] getSections() {
return null;
}
}5. ContactsFragment：通讯录主类。这里只是将好友列表的排序和显示的代码贴出来。filledData将好友列表数据填充到ContactsModel列表中，并且根据sortPinyin进行排序。
public class ContactsFragment extends ListFragment implements HttpCallBackListener{
private SideBar mSideBar;
private TextView mLetter;
private ContactsAdapter mAdapter;
private FriendList mFriendList;
private String mFriendId;
/**
* 汉字转换成拼音的类
*/
private CharacterParser mCharacterParser;
private List<ContactsModel> mSourceDateList;
/**
* 根据拼音来排列ListView里面的数据类
*/
private PinyinComparator mPinyinComparator;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mSourceDateList = new ArrayList<ContactsModel>();
// 实例化汉字转拼音类
mCharacterParser = CharacterParser.getInstance();
mPinyinComparator = new PinyinComparator();
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setListener();
// 获取好友列表
mFriendList = DataUtils.GetFriendList();
// 设置好友列表数据
mSourceDateList = filledData(mFriendList);
mAdapter = new ContactsAdapter(mContext, mSourceDateList);
setListAdapter(mAdapter);
}
private void setListener()
{
//设置显示字母的TextView
mSideBar.setTextView(mLetter);
// 设置右侧触摸监听
mSideBar.setOnTouchingLetterChangedListener(new OnTouchingLetterChangedListener() {
@Override
public void onTouchingLetterChanged(String s) {
// 该字母首次出现的位置
int position = mAdapter.getPositionForSection(s.charAt(0));
if (position != -1) {
mFriendListView.setSelection(position);
}
}
});
}
/**
* 为ListView填充数据<BR/>
* 已经根据首字母排序
*/
private List<ContactsModel> filledData(FriendList friendList){
List<ContactsModel> mSortList = new ArrayList<ContactsModel>();
List<User> friends = friendList.getFriends();
if(friends == null)
return mSortList;
for(int i=0; i<friends.size(); i++){
ContactsModel contactsModel = new ContactsModel();
User user = friends.get(i);
contactsModel.setPhoto(user.getPhoto());
contactsModel.setName(user.getName());
contactsModel.setGender(user.getGender());
contactsModel.setUserId(user.getUserId());
//将昵称首字转换成拼音
String pinyin = mCharacterParser.getSelling(user.getName().substring(0, 1));
String sortLetter = pinyin.substring(0, 1).toUpperCase();//拼音首字母，用于显示
String sortPinyin = pinyin.toUpperCase();//拼音，用于排序
// 正则表达式，判断首字母是否是英文字母
if(sortLetter.matches("[A-Z]")){
contactsModel.setSortLetter(sortLetter);
contactsModel.setSortPinyin(sortPinyin);
}else{
contactsModel.setSortLetter("#");
contactsModel.setSortPinyin("#");
}
mSortList.add(contactsModel);
}
// 根据a-z进行排序源数据
Collections.sort(mSortList, mPinyinComparator);
return mSortList;
}
}参考网址：/article/1645788.html
二，头像显示
通讯录的好友列表项，点击可进入好友基本信息界面，并且点击头像可放大显示，再次点击则恢复。一般来说，列表中的小头像是压缩后的缩略图，只有在点击头像放大显示时，才需要加载清晰图片。不过我这里没有这样处理，只是简单将原图放大显示(因为原图并非是压缩后的缩略图)。
图片放大显示，是将头像以Bitmap类型传(Drawable没有实现序列化，不能用于传递)递到ShowPhotoActivity进行显示。ShowPhotoActivity的出现和消失，具有动画效果。
ShowPhotoActivity.java
public class ShowPhotoActivity extends Activity {
private ImageView mShowPhoto;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_show_photo);
mShowPhoto = (ImageView) findViewById(R.id.showPhotoImage);
Intent intent = getIntent();
Bitmap bmp = (Bitmap) intent.getParcelableExtra(Constants.Flags.SHOW_PHOTO);
if(bmp != null)
{
mShowPhoto.setImageDrawable(new BitmapDrawable(bmp));
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
finish();
return true;
}
} layout_show_photo.xml<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#000000"
android:gravity="center" >
<ImageView
android:id="@+id/showPhotoImage"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="@drawable/photo_default"
android:scaleType="fitCenter"/>
</LinearLayout>AndroidManifest.xml
<activity android:name=".view.ShowPhotoActivity" android:theme="@style/ShowPhotoStyle" android:screenOrientation="portrait"> </activity>
styles.xml
<!-- 头像放大显示的样式 -->
<style name="ShowPhotoStyle" parent="android:Theme.Black.NoTitleBar">
<item name="android:windowAnimationStyle">@style/AnimShowPhoto</item>
<!-- 无标题 -->
<item name="android:windowNoTitle">true</item>
<!-- 设置全屏显示 -->
<item name="android:windowFullscreen">true</item>
<!-- 边框 -->
<item name="android:windowFrame">@null</item>
<!-- 是否浮现在activity之上 -->
<item name="android:windowIsFloating">false</item>
<!-- 半透明 -->
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowBackground">@android:color/black</item>
<!-- 模糊 -->
<item name="android:backgroundDimEnabled">false</item>
</style>
<style name="AnimShowPhoto" parent="@android:style/Animation">
<item name="android:windowEnterAnimation">@anim/show_photo_in</item>
<item name="android:windowExitAnimation">@anim/show_photo_out</item>
</style>show_photo_in.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- 左上角扩大-->
<scale xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_decelerate_interpolator"
android:fromXScale="0.001"
android:toXScale="1.0"
android:fromYScale="0.001"
android:toYScale="1.0"
android:pivotX="15%"
android:pivotY="25%"
android:duration="200" /> show_photo_out.xml<?xml version="1.0" encoding="utf-8"?>
<!-- 左上角缩小 -->
<scale xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_decelerate_interpolator"
android:fromXScale="1.0"
android:toXScale="0.001"
android:fromYScale="1.0"
android:toYScale="0.001"
android:pivotX="15%"
android:pivotY="25%"
android:duration="200" />首页 Android聊天软件的开发
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