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   源码介绍

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package com.dwtedx.qq;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.text.Editable;
import android.text.Selection;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.TextUtils;
import android.text.style.ImageSpan;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.dwtedx.qq.adapter.ChatLVAdapter;
import com.dwtedx.qq.adapter.FaceGVAdapter;
import com.dwtedx.qq.adapter.FaceVPAdapter;
import com.dwtedx.qq.bean.ChatInfo;
import com.dwtedx.qq.view.DropdownListView;
import com.dwtedx.qq.view.DropdownListView.OnRefreshListenerHeader;
import com.dwtedx.qq.view.MyEditText;
import com.dwtedx.tst.R;

/**
 * */
public class ChatActivity extends Activity implements OnClickListener,OnRefreshListenerHeader{
private ViewPager mViewPager;
private LinearLayout mDotsLayout;
private MyEditText input;
private Button send;
private DropdownListView mListView;
private ChatLVAdapter mLvAdapter;

private LinearLayout chat_face_container;
private ImageView image_face;//表情图标
// 7列3行
private int columns = 6;
private int rows = 4;
private List<View> views = new ArrayList<View>();
private List<String> staticFacesList;
private LinkedList<ChatInfo> infos = new LinkedList<ChatInfo>();
private SimpleDateFormat sd;

private String reply="";//模拟回复

@SuppressLint("SimpleDateFormat")
private void initViews() {
mListView = (DropdownListView) findViewById(R.id.message_chat_listview);
sd=new SimpleDateFormat("MM-dd HH:mm");
//模拟收到信息
infos.add(getChatInfoFrom("你好啊！"));
infos.add(getChatInfoFrom("认识你很高兴#[face/png/f_static_018.png]#"));
mLvAdapter = new ChatLVAdapter(this, infos);
mListView.setAdapter(mLvAdapter);
//表情图标
image_face=(ImageView) findViewById(R.id.image_face);
//表情布局
chat_face_container=(LinearLayout) findViewById(R.id.chat_face_container);
mViewPager = (ViewPager) findViewById(R.id.face_viewpager);
mViewPager.setOnPageChangeListener(new PageChange());
//表情下小圆点
mDotsLayout = (LinearLayout) findViewById(R.id.face_dots_container);
input = (MyEditText) findViewById(R.id.input_sms);
input.setOnClickListener(this);
send = (Button) findViewById(R.id.send_sms);
InitViewPager();
//表情按钮
image_face.setOnClickListener(this);
// 发送
send.setOnClickListener(this);

mListView.setOnRefreshListenerHead(this);
mListView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View arg0, MotionEvent arg1) {
if(arg1.getAction()==MotionEvent.ACTION_DOWN){
if(chat_face_container.getVisibility()==View.VISIBLE){
chat_face_container.setVisibility(View.GONE);
}
}
return false;
}
});
}


@Override
public void onClick(View arg0) {
switch (arg0.getId()) {
case R.id.input_sms://输入框
if(chat_face_container.getVisibility()==View.VISIBLE){
chat_face_container.setVisibility(View.GONE);
}
break;
case R.id.image_face://表情
hideSoftInputView();//隐藏软键盘
if(chat_face_container.getVisibility()==View.GONE){
chat_face_container.setVisibility(View.VISIBLE);
}else{
chat_face_container.setVisibility(View.GONE);
}
break;
case R.id.send_sms://发送
reply=input.getText().toString();
if (!TextUtils.isEmpty(reply)) {
infos.add(getChatInfoTo(reply));
mLvAdapter.setList(infos);
mLvAdapter.notifyDataSetChanged();
mListView.setSelection(infos.size() - 1);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
infos.add(getChatInfoFrom(reply));
mLvAdapter.setList(infos);
mLvAdapter.notifyDataSetChanged();
mListView.setSelection(infos.size() - 1);
}
}, 1000);
input.setText("");
}
break;

default:
break;
}
}

/*
* 初始表情 *
*/
private void InitViewPager() {
// 获取页数
for (int i = 0; i < getPagerCount(); i ) {
views.add(viewPagerItem(i));
LayoutParams params = new LayoutParams(16, 16);
mDotsLayout.addView(dotsItem(i), params);
}
FaceVPAdapter mVpAdapter = new FaceVPAdapter(views);
mViewPager.setAdapter(mVpAdapter);
mDotsLayout.getChildAt(0).setSelected(true);
}

private View viewPagerItem(int position) {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.face_gridview, null);//表情布局
GridView gridview = (GridView) layout.findViewById(R.id.chart_face_gv);
/**
* 注：因为每一页末尾都有一个删除图标，所以每一页的实际表情columns *　rows　－　1; 空出最后一个位置给删除图标
* */
List<String> subList = new ArrayList<String>();
subList.addAll(staticFacesList
.subList(position * (columns * rows - 1),
(columns * rows - 1) * (position 1) > staticFacesList
.size() ? staticFacesList.size() : (columns
* rows - 1)
* (position 1)));
/**
* 末尾添加删除图标
* */
subList.add("emotion_del_normal.png");
FaceGVAdapter mGvAdapter = new FaceGVAdapter(subList, this);
gridview.setAdapter(mGvAdapter);
gridview.setNumColumns(columns);
// 单击表情执行的操作
gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
try {
String png = ((TextView) ((LinearLayout) view).getChildAt(1)).getText().toString();
if (!png.contains("emotion_del_normal")) {// 如果不是删除图标
insert(getFace(png));
} else {
delete();
}
} catch (Exception e) {
e.printStackTrace();
}
}
});

return gridview;
}

private SpannableStringBuilder getFace(String png) {
SpannableStringBuilder sb = new SpannableStringBuilder();
try {
/**
* 经过测试，虽然这里tempText被替换为png显示，但是但我单击发送按钮时，获取到輸入框的内容是tempText的值而不是png
* 所以这里对这个tempText值做特殊处理
* 格式：#[face/png/f_static_000.png]#，以方便判斷當前圖片是哪一個
* */
String tempText = "#[" png "]#";
sb.append(tempText);
sb.setSpan(
new ImageSpan(ChatActivity.this, BitmapFactory
.decodeStream(getAssets().open(png))), sb.length()
- tempText.length(), sb.length(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

} catch (Exception e) {
e.printStackTrace();
}

return sb;
}

/**
* 向输入框里添加表情
* */
private void insert(CharSequence text) {
int iCursorStart = Selection.getSelectionStart((input.getText()));
int iCursorEnd = Selection.getSelectionEnd((input.getText()));
if (iCursorStart != iCursorEnd) {
((Editable) input.getText()).replace(iCursorStart, iCursorEnd, "");
}
int iCursor = Selection.getSelectionEnd((input.getText()));
((Editable) input.getText()).insert(iCursor, text);
}

/**
* 删除图标执行事件
* 注：如果删除的是表情，在删除时实际删除的是tempText即图片占位的字符串，所以必需一次性删除掉tempText，才能将图片删除
* */
private void delete() {
if (input.getText().length() != 0) {
int iCursorEnd = Selection.getSelectionEnd(input.getText());
int iCursorStart = Selection.getSelectionStart(input.getText());
if (iCursorEnd > 0) {
if (iCursorEnd == iCursorStart) {
if (isDeletePng(iCursorEnd)) {
String st = "#[face/png/f_static_000.png]#";
((Editable) input.getText()).delete(
iCursorEnd - st.length(), iCursorEnd);
} else {
((Editable) input.getText()).delete(iCursorEnd - 1,
iCursorEnd);
}
} else {
((Editable) input.getText()).delete(iCursorStart,
iCursorEnd);
}
}
}
}

/**
* 判断即将删除的字符串是否是图片占位字符串tempText 如果是：则讲删除整个tempText
* **/
private boolean isDeletePng(int cursor) {
String st = "#[face/png/f_static_000.png]#";
String content = input.getText().toString().substring(0, cursor);
if (content.length() >= st.length()) {
String checkStr = content.substring(content.length() - st.length(),
content.length());
String regex = "(\\#\\[face/png/f_static_)\\d{3}(.png\\]\\#)";
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(checkStr);
return m.matches();
}
return false;
}

private ImageView dotsItem(int position) {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.dot_image, null);
ImageView iv = (ImageView) layout.findViewById(R.id.face_dot);
iv.setId(position);
return iv;
}

/**
* 根据表情数量以及GridView设置的行数和列数计算Pager数量
* @return
*/
private int getPagerCount() {
int count = staticFacesList.size();
return count % (columns * rows - 1) == 0 ? count / (columns * rows - 1)
: count / (columns * rows - 1) 1;
}

/**
* 初始化表情列表staticFacesList
*/
private void initStaticFaces() {
try {
staticFacesList = new ArrayList<String>();
String[] faces = getAssets().list("face/png");
//将Assets中的表情名称转为字符串一一添加进staticFacesList
for (int i = 0; i < faces.length; i ) {
staticFacesList.add(faces[i]);
}
//去掉删除图片
staticFacesList.remove("emotion_del_normal.png");
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 表情页改变时，dots效果也要跟着改变
* */
class PageChange implements OnPageChangeListener {
@Override
public void onPageScrollStateChanged(int arg0) {
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageSelected(int arg0) {
for (int i = 0; i < mDotsLayout.getChildCount(); i ) {
mDotsLayout.getChildAt(i).setSelected(false);
}
mDotsLayout.getChildAt(arg0).setSelected(true);
}

}

/**
* 发送的信息
* @param message
* @return
*/
private ChatInfo getChatInfoTo(String message) {
ChatInfo info = new ChatInfo();
info.content = message;
info.fromOrTo = 1;
info.time=sd.format(new Date());
return info;
}

/**
* 接收的信息
* @param message
* @return
*/
private ChatInfo getChatInfoFrom(String message) {
ChatInfo info = new ChatInfo();
info.content = message;
info.fromOrTo = 0;
info.time=sd.format(new Date());
return info;
}

@SuppressLint("HandlerLeak")
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 0:
mLvAdapter.setList(infos);
mLvAdapter.notifyDataSetChanged();
mListView.onRefreshCompleteHeader();
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.chat_main);
initStaticFaces();
initViews();
}

@Override
public void onRefresh() {
new Thread() {
@Override
public void run() {
try {
sleep(1000);
Message msg = mHandler.obtainMessage(0);
mHandler.sendMessage(msg);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}.start();
}

public void hideSoftInputView() {
InputMethodManager manager = ((InputMethodManager) this.getSystemService(Activity.INPUT_METHOD_SERVICE));
if (getWindow().getAttributes().softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN) {
if (getCurrentFocus() != null)
manager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
}
}

}