Android编程实现QQ表情的发送和接收完整实例(附源码)
作者：段残梦
这篇文章主要介绍了Android编程实现QQ表情的发送和接收的方法,涉及Android图片资源、正则表达式及对话框的相关操作技巧,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了Android编程实现QQ表情的发送和接收。分享给大家供大家参考，具体如下：
在自己做一个聊天应用练习的时候，需要用到表情，于是就想着模仿一下QQ表情，图片资源完全copy的QQ.apk，解压就可以得到，这里不细说。
下面将该应用中的表情模块功能抽离出来，以便自己以后复习回顾。。
先看一下效果图：
首先进入界面：（完全仿照QQ）
点击一下上面的表情图标：
选择一些表情，输入一些文字混合：
点击发送：
可以看到文字和表情图片都一起显示出来了。
下面列出一些关键代码：
表情工具类ExpressionUtil:
public class ExpressionUtil {
/**
* 对spanableString进行正则判断，如果符合要求，则以表情图片代替
* @param context
* @param spannableString
* @param patten
* @param start
* @throws SecurityException
* @throws NoSuchFieldException
* @throws NumberFormatException
* @throws IllegalArgumentException
* @throws IllegalAccessException
*/
public static void dealExpression(Context context,SpannableString spannableString, Pattern patten, int start) throws SecurityException, NoSuchFieldException, NumberFormatException, IllegalArgumentException, IllegalAccessException {
Matcher matcher = patten.matcher(spannableString);
while (matcher.find()) {
String key = matcher.group();
if (matcher.start() < start) {
continue;
}
Field field = R.drawable.class.getDeclaredField(key);
int resId = Integer.parseInt(field.get(null).toString()); //通过上面匹配得到的字符串来生成图片资源id
if (resId != 0) {
Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), resId);
ImageSpan imageSpan = new ImageSpan(bitmap); //通过图片资源id来得到bitmap，用一个ImageSpan来包装
int end = matcher.start() + key.length(); //计算该图片名字的长度，也就是要替换的字符串的长度
spannableString.setSpan(imageSpan, matcher.start(), end, Spannable.SPAN_INCLUSIVE_EXCLUSIVE); //将该图片替换字符串中规定的位置中
if (end < spannableString.length()) { //如果整个字符串还未验证完，则继续。。
dealExpression(context,spannableString, patten, end);
}
break;
}
}
}
/**
* 得到一个SpanableString对象，通过传入的字符串,并进行正则判断
* @param context
* @param str
* @return
*/
public static SpannableString getExpressionString(Context context,String str,String zhengze){
SpannableString spannableString = new SpannableString(str);
Pattern sinaPatten = Pattern.compile(zhengze, Pattern.CASE_INSENSITIVE); //通过传入的正则表达式来生成一个pattern
try {
dealExpression(context,spannableString, sinaPatten, 0);
} catch (Exception e) {
Log.e("dealExpression", e.getMessage());
}
return spannableString;
}
}
在显示聊天页面的list的适配器中，我们需要做如下的显示，即调用上面工具类的方法：
SimpleChatAdapter中的内部类ViewHolder：
private class ViewHolder{
RelativeLayout chat_layout;
ImageView image;
TextView text;
public ViewHolder(View convertView){
chat_layout=(RelativeLayout) convertView.findViewById(R.id.team_singlechat_id_listiteam);
image=(ImageView) convertView.findViewById(R.id.team_singlechat_id_listiteam_headicon);
text=(TextView) convertView.findViewById(R.id.team_singlechat_id_listiteam_message);
}
public void setData(MessageInfo msg){
RelativeLayout.LayoutParams rl_chat_left=((RelativeLayout.LayoutParams)chat_layout.getLayoutParams());
RelativeLayout.LayoutParams rl_tv_msg_left=((RelativeLayout.LayoutParams)text.getLayoutParams());
RelativeLayout.LayoutParams rl_iv_headicon_left=((RelativeLayout.LayoutParams)image.getLayoutParams());
if(!DicqConstant.DEFAULTMAC.equalsIgnoreCase(msg.getUsermac())){ //根据本地的mac地址来判断该条信息是属于本人所说还是对方所说
//如果是自己说的，则显示在右边；如果是对方所说，则显示在左边
rl_chat_left.addRule(RelativeLayout.ALIGN_PARENT_LEFT,-1);
rl_chat_left.addRule(RelativeLayout.ALIGN_PARENT_RIGHT,0);
rl_iv_headicon_left.addRule(RelativeLayout.ALIGN_PARENT_LEFT,-1);
rl_iv_headicon_left.addRule(RelativeLayout.ALIGN_PARENT_RIGHT,0);
rl_tv_msg_left.addRule(RelativeLayout.RIGHT_OF,R.id.team_singlechat_id_listiteam_headicon);
rl_tv_msg_left.addRule(RelativeLayout.LEFT_OF,0);
text.setBackgroundResource(R.drawable.balloon_l_selector);
}else{
rl_chat_left.addRule(RelativeLayout.ALIGN_PARENT_LEFT,0);
rl_chat_left.addRule(RelativeLayout.ALIGN_PARENT_RIGHT,-1);
rl_iv_headicon_left.addRule(RelativeLayout.ALIGN_PARENT_LEFT,0);
rl_iv_headicon_left.addRule(RelativeLayout.ALIGN_PARENT_RIGHT,-1);
rl_tv_msg_left.addRule(RelativeLayout.RIGHT_OF,0);
rl_tv_msg_left.addRule(RelativeLayout.LEFT_OF,R.id.team_singlechat_id_listiteam_headicon);
text.setBackgroundResource(R.drawable.balloon_r_selector);
}
image.setImageResource(PrortaitUtils.conversionIdToRes(msg.getProtrait())); //设置头像
String str = msg.getMsg(); //消息具体内容
String zhengze = "f0[0-9]{2}|f10[0-7]"; //正则表达式，用来判断消息内是否有表情
try {
SpannableString spannableString = ExpressionUtil.getExpressionString(context, str, zhengze);
text.setText(spannableString);
} catch (NumberFormatException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
}
}
}
关于表情弹出框的实现如下：
MainActivity：
/**
* 创建一个表情选择对话框
*/
private void createExpressionDialog() {
builder = new Dialog(MainActivity.this);
GridView gridView = createGridView();
builder.setContentView(gridView);
builder.setTitle("默认表情");
builder.show();
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
Bitmap bitmap = null;
bitmap = BitmapFactory.decodeResource(getResources(), imageIds[arg2 % imageIds.length]);
ImageSpan imageSpan = new ImageSpan(MainActivity.this, bitmap);
String str = null;
if(arg2<10){
str = "f00"+arg2;
}else if(arg2<100){
str = "f0"+arg2;
}else{
str = "f"+arg2;
}
SpannableString spannableString = new SpannableString(str);
spannableString.setSpan(imageSpan, 0, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
edit.append(spannableString);
builder.dismiss();
}
});
}
/**
* 生成一个表情对话框中的gridview
* @return
*/
private GridView createGridView() {
final GridView view = new GridView(this);
List<Map<String,Object>> listItems = new ArrayList<Map<String,Object>>();
//生成107个表情的id，封装
for(int i = 0; i < 107; i++){
try {
if(i<10){
Field field = R.drawable.class.getDeclaredField("f00" + i);
int resourceId = Integer.parseInt(field.get(null).toString());
imageIds[i] = resourceId;
}else if(i<100){
Field field = R.drawable.class.getDeclaredField("f0" + i);
int resourceId = Integer.parseInt(field.get(null).toString());
imageIds[i] = resourceId;
}else{
Field field = R.drawable.class.getDeclaredField("f" + i);
int resourceId = Integer.parseInt(field.get(null).toString());
imageIds[i] = resourceId;
}
} catch (NumberFormatException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
Map<String,Object> listItem = new HashMap<String,Object>();
listItem.put("image", imageIds[i]);
listItems.add(listItem);
}
SimpleAdapter simpleAdapter = new SimpleAdapter(this, listItems, R.layout.team_layout_single_expression_cell, new String[]{"image"}, new int[]{R.id.image});
view.setAdapter(simpleAdapter);
view.setNumColumns(6);
view.setBackgroundColor(Color.rgb(214, 211, 214));
view.setHorizontalSpacing(1);
view.setVerticalSpacing(1);
view.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
view.setGravity(Gravity.CENTER);
return view;
}
完整实例代码代码点击此处本站下载。
希望本文所述对大家Android程序设计有所帮助。