android仿微信聊天界面 语音录制功能

本例为模仿微信聊天界面ui设计，文字发送以及语言录制ui。

1先看效果图：

 

 

 

第一:chat.xml设计

 <?xml version="1.0" encoding="utf-8"?> 
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  android:background="@drawable/chat_bg_default" > 
 
  <!-- 标题栏 --> 
  <relativelayout 
    android:id="@+id/rl_layout" 
    android:layout_width="fill_parent" 
    android:layout_height="45dp" 
    android:background="@drawable/title_bar" 
    android:gravity="center_vertical" > 
 
    <button 
      android:id="@+id/btn_back" 
      android:layout_width="70dp" 
      android:layout_height="wrap_content" 
      android:layout_centervertical="true" 
      android:background="@drawable/title_btn_back" 
      android:onclick="chat_back" 
      android:text="返回" 
      android:textcolor="#fff" 
      android:textsize="14sp" /> 
 
    <textview 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_centerinparent="true" 
      android:text="白富美" 
      android:textcolor="#ffffff" 
      android:textsize="20sp" /> 
 
    <imagebutton 
      android:id="@+id/right_btn" 
      android:layout_width="67dp" 
      android:layout_height="wrap_content" 
      android:layout_alignparentright="true" 
      android:layout_centervertical="true" 
      android:layout_marginright="5dp" 
      android:background="@drawable/title_btn_right" 
      android:src="@drawable/mm_title_btn_contact_normal" /> 
  </relativelayout> 
 
  <!-- 底部按钮以及 编辑框 --> 
  <relativelayout 
    android:id="@+id/rl_bottom" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_alignparentbottom="true" 
    android:background="@drawable/chat_footer_bg" > 
 
    <imageview 
      android:id="@+id/ivpopup" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignparentleft="true" 
      android:layout_centervertical="true" 
      android:layout_marginleft="10dip" 
      android:src="@drawable/chatting_setmode_msg_btn" /> 
 
    <relativelayout 
      android:id="@+id/btn_bottom" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_alignparentright="true" 
      android:layout_centervertical="true" 
      android:layout_torightof="@+id/ivpopup" > 
 
      <button 
        android:id="@+id/btn_send" 
        android:layout_width="60dp" 
        android:layout_height="40dp" 
        android:layout_alignparentright="true" 
        android:layout_centervertical="true" 
        android:layout_marginright="10dp" 
        android:background="@drawable/chat_send_btn" 
        android:text="发送" /> 
 
      <edittext 
        android:id="@+id/et_sendmessage" 
        android:layout_width="fill_parent" 
        android:layout_height="40dp" 
        android:layout_centervertical="true" 
        android:layout_marginleft="10dp" 
        android:layout_marginright="10dp" 
        android:layout_toleftof="@id/btn_send" 
        android:background="@drawable/login_edit_normal" 
        android:singleline="true" 
        android:textsize="18sp" /> 
    </relativelayout> 
 
    <textview 
      android:id="@+id/btn_rcd" 
      android:layout_width="fill_parent" 
      android:layout_height="40dp" 
      android:layout_alignparentright="true" 
      android:layout_centervertical="true" 
      android:layout_marginleft="10dp" 
      android:layout_marginright="10dp" 
      android:layout_torightof="@+id/ivpopup" 
      android:background="@drawable/chat_send_btn" 
      android:gravity="center" 
      android:text="按住说话" 
      android:visibility="gone" /> 
  </relativelayout> 
   
  <!-- 聊天内容 listview --> 
  <listview 
    android:id="@+id/listview" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_above="@id/rl_bottom" 
    android:layout_below="@id/rl_layout" 
    android:cachecolorhint="#0000" 
    android:divider="@null" 
    android:dividerheight="5dp" 
    android:scrollbarstyle="outsideoverlay" 
    android:stackfrombottom="true" /> 
   
  <!-- 录音显示ui层 --> 
  <linearlayout 
    android:id="@+id/rcchat_popup" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:gravity="center" 
    android:visibility="gone" > 
 
    <include 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_gravity="center" 
      layout="@layout/voice_rcd_hint_window" /> 
  </linearlayout> 
 
</relativelayout> 

第二：语音录制类封装soundmeter.java

package com.example.voice_rcd; 
 
import java.io.ioexception; 
 
import android.media.mediarecorder; 
import android.os.environment; 
 
public class soundmeter { 
  static final private double ema_filter = 0.6; 
 
  private mediarecorder mrecorder = null; 
  private double mema = 0.0; 
 
  public void start(string name) { 
    if (!environment.getexternalstoragestate().equals( 
        android.os.environment.media_mounted)) { 
      return; 
    } 
    if (mrecorder == null) { 
      mrecorder = new mediarecorder(); 
      mrecorder.setaudiosource(mediarecorder.audiosource.mic); 
      mrecorder.setoutputformat(mediarecorder.outputformat.three_gpp); 
      mrecorder.setaudioencoder(mediarecorder.audioencoder.amr_nb); 
      mrecorder.setoutputfile(android.os.environment.getexternalstoragedirectory()+"/"+name); 
      try { 
        mrecorder.prepare(); 
        mrecorder.start(); 
         
        mema = 0.0; 
      } catch (illegalstateexception e) { 
        system.out.print(e.getmessage()); 
      } catch (ioexception e) { 
        system.out.print(e.getmessage()); 
      } 
 
    } 
  } 
 
  public void stop() { 
    if (mrecorder != null) { 
      mrecorder.stop(); 
      mrecorder.release(); 
      mrecorder = null; 
    } 
  } 
 
  public void pause() { 
    if (mrecorder != null) { 
      mrecorder.stop(); 
    } 
  } 
 
  public void start() { 
    if (mrecorder != null) { 
      mrecorder.start(); 
    } 
  } 
 
  public double getamplitude() { 
    if (mrecorder != null) 
      return (mrecorder.getmaxamplitude() / 2700.0); 
    else 
      return 0; 
 
  } 
 
  public double getamplitudeema() { 
    double amp = getamplitude(); 
    mema = ema_filter * amp + (1.0 - ema_filter) * mema; 
    return mema; 
  } 
} 

 

第三：主界面activity源码，没写太多解释，相对比较简单的自己研究下：

package com.example.voice_rcd; 
 
import java.io.file; 
import java.util.arraylist; 
import java.util.calendar; 
import java.util.list; 
 
import android.app.activity; 
import android.os.bundle; 
import android.os.environment; 
import android.os.handler; 
import android.os.systemclock; 
import android.view.motionevent; 
import android.view.view; 
import android.view.view.onclicklistener; 
import android.view.view.ontouchlistener; 
import android.view.windowmanager; 
import android.view.animation.animation; 
import android.view.animation.animationutils; 
import android.widget.button; 
import android.widget.edittext; 
import android.widget.imageview; 
import android.widget.linearlayout; 
import android.widget.listview; 
import android.widget.relativelayout; 
import android.widget.textview; 
import android.widget.toast; 
 
public class mainactivity extends activity implements onclicklistener { 
  /** called when the activity is first created. */ 
 
  private button mbtnsend; 
  private textview mbtnrcd; 
  private button mbtnback; 
  private edittext medittextcontent; 
  private relativelayout mbottom; 
  private listview mlistview; 
  private chatmsgviewadapter madapter; 
  private list<chatmsgentity> mdataarrays = new arraylist<chatmsgentity>(); 
  private boolean isshosrt = false; 
  private linearlayout voice_rcd_hint_loading, voice_rcd_hint_rcding, 
      voice_rcd_hint_tooshort; 
  private imageview img1, sc_img1; 
  private soundmeter msensor; 
  private view rcchat_popup; 
  private linearlayout del_re; 
  private imageview chatting_mode_btn, volume; 
  private boolean btn_vocie = false; 
  private int flag = 1; 
  private handler mhandler = new handler(); 
  private string voicename; 
  private long startvoicet, endvoicet; 
 
  public void oncreate(bundle savedinstancestate) { 
    super.oncreate(savedinstancestate); 
    setcontentview(r.layout.chat); 
    // 启动activity时不自动弹出软键盘 
    getwindow().setsoftinputmode( 
        windowmanager.layoutparams.soft_input_state_always_hidden); 
    initview(); 
 
    initdata(); 
  } 
 
  public void initview() { 
    mlistview = (listview) findviewbyid(r.id.listview); 
    mbtnsend = (button) findviewbyid(r.id.btn_send); 
    mbtnrcd = (textview) findviewbyid(r.id.btn_rcd); 
    mbtnsend.setonclicklistener(this); 
    mbtnback = (button) findviewbyid(r.id.btn_back); 
    mbottom = (relativelayout) findviewbyid(r.id.btn_bottom); 
    mbtnback.setonclicklistener(this); 
    chatting_mode_btn = (imageview) this.findviewbyid(r.id.ivpopup); 
    volume = (imageview) this.findviewbyid(r.id.volume); 
    rcchat_popup = this.findviewbyid(r.id.rcchat_popup); 
    img1 = (imageview) this.findviewbyid(r.id.img1); 
    sc_img1 = (imageview) this.findviewbyid(r.id.sc_img1); 
    del_re = (linearlayout) this.findviewbyid(r.id.del_re); 
    voice_rcd_hint_rcding = (linearlayout) this 
        .findviewbyid(r.id.voice_rcd_hint_rcding); 
    voice_rcd_hint_loading = (linearlayout) this 
        .findviewbyid(r.id.voice_rcd_hint_loading); 
    voice_rcd_hint_tooshort = (linearlayout) this 
        .findviewbyid(r.id.voice_rcd_hint_tooshort); 
    msensor = new soundmeter(); 
    medittextcontent = (edittext) findviewbyid(r.id.et_sendmessage); 
     
    //语音文字切换按钮 
    chatting_mode_btn.setonclicklistener(new onclicklistener() { 
 
      public void onclick(view v) { 
 
        if (btn_vocie) { 
          mbtnrcd.setvisibility(view.gone); 
          mbottom.setvisibility(view.visible); 
          btn_vocie = false; 
          chatting_mode_btn 
              .setimageresource(r.drawable.chatting_setmode_msg_btn); 
 
        } else { 
          mbtnrcd.setvisibility(view.visible); 
          mbottom.setvisibility(view.gone); 
          chatting_mode_btn 
              .setimageresource(r.drawable.chatting_setmode_voice_btn); 
          btn_vocie = true; 
        } 
      } 
    }); 
    mbtnrcd.setontouchlistener(new ontouchlistener() { 
       
      public boolean ontouch(view v, motionevent event) { 
        //按下语音录制按钮时返回false执行父类ontouch 
        return false; 
      } 
    }); 
  } 
 
  private string[] msgarray = new string[] { "有人就有恩怨","有恩怨就有江湖","人就是江湖","你怎么退出？ ","生命中充满了巧合","两条平行线也会有相交的一天。"}; 
 
  private string[] dataarray = new string[] { "2012-10-31 18:00", 
      "2012-10-31 18:10", "2012-10-31 18:11", "2012-10-31 18:20", 
      "2012-10-31 18:30", "2012-10-31 18:35"}; 
  private final static int count = 6; 
 
  public void initdata() { 
    for (int i = 0; i < count; i++) { 
      chatmsgentity entity = new chatmsgentity(); 
      entity.setdate(dataarray[i]); 
      if (i % 2 == 0) { 
        entity.setname("白富美"); 
        entity.setmsgtype(true); 
      } else { 
        entity.setname("高富帅"); 
        entity.setmsgtype(false); 
      } 
 
      entity.settext(msgarray[i]); 
      mdataarrays.add(entity); 
    } 
 
    madapter = new chatmsgviewadapter(this, mdataarrays); 
    mlistview.setadapter(madapter); 
 
  } 
 
  public void onclick(view v) { 
    // todo auto-generated method stub 
    switch (v.getid()) { 
    case r.id.btn_send: 
      send(); 
      break; 
    case r.id.btn_back: 
      finish(); 
      break; 
    } 
  } 
 
  private void send() { 
    string contstring = medittextcontent.gettext().tostring(); 
    if (contstring.length() > 0) { 
      chatmsgentity entity = new chatmsgentity(); 
      entity.setdate(getdate()); 
      entity.setname("高富帅"); 
      entity.setmsgtype(false); 
      entity.settext(contstring); 
 
      mdataarrays.add(entity); 
      madapter.notifydatasetchanged(); 
 
      medittextcontent.settext(""); 
 
      mlistview.setselection(mlistview.getcount() - 1); 
    } 
  } 
 
  private string getdate() { 
    calendar c = calendar.getinstance(); 
 
    string year = string.valueof(c.get(calendar.year)); 
    string month = string.valueof(c.get(calendar.month)); 
    string day = string.valueof(c.get(calendar.day_of_month) + 1); 
    string hour = string.valueof(c.get(calendar.hour_of_day)); 
    string mins = string.valueof(c.get(calendar.minute)); 
 
    stringbuffer sbbuffer = new stringbuffer(); 
    sbbuffer.append(year + "-" + month + "-" + day + " " + hour + ":" 
        + mins); 
 
    return sbbuffer.tostring(); 
  } 
 
  //按下语音录制按钮时 
  @override 
  public boolean ontouchevent(motionevent event) { 
 
    if (!environment.getexternalstoragedirectory().exists()) { 
      toast.maketext(this, "no sdcard", toast.length_long).show(); 
      return false; 
    } 
 
    if (btn_vocie) { 
      system.out.println("1"); 
      int[] location = new int[2]; 
      mbtnrcd.getlocationinwindow(location); // 获取在当前窗口内的绝对坐标 
      int btn_rc_y = location[1]; 
      int btn_rc_x = location[0]; 
      int[] del_location = new int[2]; 
      del_re.getlocationinwindow(del_location); 
      int del_y = del_location[1]; 
      int del_x = del_location[0]; 
      if (event.getaction() == motionevent.action_down && flag == 1) { 
        if (!environment.getexternalstoragedirectory().exists()) { 
          toast.maketext(this, "no sdcard", toast.length_long).show(); 
          return false; 
        } 
        system.out.println("2"); 
        if (event.gety() > btn_rc_y && event.getx() > btn_rc_x) {//判断手势按下的位置是否是语音录制按钮的范围内 
          system.out.println("3"); 
          mbtnrcd.setbackgroundresource(r.drawable.voice_rcd_btn_pressed); 
          rcchat_popup.setvisibility(view.visible); 
          voice_rcd_hint_loading.setvisibility(view.visible); 
          voice_rcd_hint_rcding.setvisibility(view.gone); 
          voice_rcd_hint_tooshort.setvisibility(view.gone); 
          mhandler.postdelayed(new runnable() { 
            public void run() { 
              if (!isshosrt) { 
                voice_rcd_hint_loading.setvisibility(view.gone); 
                voice_rcd_hint_rcding 
                    .setvisibility(view.visible); 
              } 
            } 
          }, 300); 
          img1.setvisibility(view.visible); 
          del_re.setvisibility(view.gone); 
          startvoicet = systemclock.currentthreadtimemillis(); 
          voicename = startvoicet + ".amr"; 
          start(voicename); 
          flag = 2; 
        } 
      } else if (event.getaction() == motionevent.action_up && flag == 2) {//松开手势时执行录制完成 
        system.out.println("4"); 
        mbtnrcd.setbackgroundresource(r.drawable.voice_rcd_btn_nor); 
        if (event.gety() >= del_y 
            && event.gety() <= del_y + del_re.getheight() 
            && event.getx() >= del_x 
            && event.getx() <= del_x + del_re.getwidth()) { 
          rcchat_popup.setvisibility(view.gone); 
          img1.setvisibility(view.visible); 
          del_re.setvisibility(view.gone); 
          stop(); 
          flag = 1; 
          file file = new file(android.os.environment.getexternalstoragedirectory()+"/" 
                  + voicename); 
          if (file.exists()) { 
            file.delete(); 
          } 
        } else { 
 
          voice_rcd_hint_rcding.setvisibility(view.gone); 
          stop(); 
          endvoicet = systemclock.currentthreadtimemillis(); 
          flag = 1; 
          int time = (int) ((endvoicet - startvoicet) / 1000); 
          if (time < 1) { 
            isshosrt = true; 
            voice_rcd_hint_loading.setvisibility(view.gone); 
            voice_rcd_hint_rcding.setvisibility(view.gone); 
            voice_rcd_hint_tooshort.setvisibility(view.visible); 
            mhandler.postdelayed(new runnable() { 
              public void run() { 
                voice_rcd_hint_tooshort 
                    .setvisibility(view.gone); 
                rcchat_popup.setvisibility(view.gone); 
                isshosrt = false; 
              } 
            }, 500); 
            return false; 
          } 
          chatmsgentity entity = new chatmsgentity(); 
          entity.setdate(getdate()); 
          entity.setname("高富帅"); 
          entity.setmsgtype(false); 
          entity.settime(time+"\""); 
          entity.settext(voicename); 
          mdataarrays.add(entity); 
          madapter.notifydatasetchanged(); 
          mlistview.setselection(mlistview.getcount() - 1); 
          rcchat_popup.setvisibility(view.gone); 
 
        } 
      } 
      if (event.gety() < btn_rc_y) {//手势按下的位置不在语音录制按钮的范围内 
        system.out.println("5"); 
        animation mlitteanimation = animationutils.loadanimation(this, 
            r.anim.cancel_rc); 
        animation mbiganimation = animationutils.loadanimation(this, 
            r.anim.cancel_rc2); 
        img1.setvisibility(view.gone); 
        del_re.setvisibility(view.visible); 
        del_re.setbackgroundresource(r.drawable.voice_rcd_cancel_bg); 
        if (event.gety() >= del_y 
            && event.gety() <= del_y + del_re.getheight() 
            && event.getx() >= del_x 
            && event.getx() <= del_x + del_re.getwidth()) { 
          del_re.setbackgroundresource(r.drawable.voice_rcd_cancel_bg_focused); 
          sc_img1.startanimation(mlitteanimation); 
          sc_img1.startanimation(mbiganimation); 
        } 
      } else { 
 
        img1.setvisibility(view.visible); 
        del_re.setvisibility(view.gone); 
        del_re.setbackgroundresource(0); 
      } 
    } 
    return super.ontouchevent(event); 
  } 
 
  private static final int poll_interval = 300; 
 
  private runnable msleeptask = new runnable() { 
    public void run() { 
      stop(); 
    } 
  }; 
  private runnable mpolltask = new runnable() { 
    public void run() { 
      double amp = msensor.getamplitude(); 
      updatedisplay(amp); 
      mhandler.postdelayed(mpolltask, poll_interval); 
 
    } 
  }; 
 
  private void start(string name) { 
    msensor.start(name); 
    mhandler.postdelayed(mpolltask, poll_interval); 
  } 
 
  private void stop() { 
    mhandler.removecallbacks(msleeptask); 
    mhandler.removecallbacks(mpolltask); 
    msensor.stop(); 
    volume.setimageresource(r.drawable.amp1); 
  } 
 
  private void updatedisplay(double signalema) { 
     
    switch ((int) signalema) { 
    case 0: 
    case 1: 
      volume.setimageresource(r.drawable.amp1); 
      break; 
    case 2: 
    case 3: 
      volume.setimageresource(r.drawable.amp2); 
       
      break; 
    case 4: 
    case 5: 
      volume.setimageresource(r.drawable.amp3); 
      break; 
    case 6: 
    case 7: 
      volume.setimageresource(r.drawable.amp4); 
      break; 
    case 8: 
    case 9: 
      volume.setimageresource(r.drawable.amp5); 
      break; 
    case 10: 
    case 11: 
      volume.setimageresource(r.drawable.amp6); 
      break; 
    default: 
      volume.setimageresource(r.drawable.amp7); 
      break; 
    } 
  } 
 
  public void head_xiaohei(view v) { // 标题栏 返回按钮 
 
  } 
} 

第四：自定义的显示适配器：

package com.example.voice_rcd; 
 
import java.util.list; 
 
import android.content.context; 
import android.media.mediaplayer; 
import android.media.mediaplayer.oncompletionlistener; 
import android.view.layoutinflater; 
import android.view.view; 
import android.view.view.onclicklistener; 
import android.view.viewgroup; 
import android.widget.baseadapter; 
import android.widget.textview; 
 
public class chatmsgviewadapter extends baseadapter { 
 
  public static interface imsgviewtype { 
    int imvt_com_msg = 0; 
    int imvt_to_msg = 1; 
  } 
 
  private static final string tag = chatmsgviewadapter.class.getsimplename(); 
 
  private list<chatmsgentity> coll; 
 
  private context ctx; 
 
  private layoutinflater minflater; 
  private mediaplayer mmediaplayer = new mediaplayer(); 
 
  public chatmsgviewadapter(context context, list<chatmsgentity> coll) { 
    ctx = context; 
    this.coll = coll; 
    minflater = layoutinflater.from(context); 
  } 
 
  public int getcount() { 
    return coll.size(); 
  } 
 
  public object getitem(int position) { 
    return coll.get(position); 
  } 
 
  public long getitemid(int position) { 
    return position; 
  } 
 
  public int getitemviewtype(int position) { 
    // todo auto-generated method stub 
    chatmsgentity entity = coll.get(position); 
 
    if (entity.getmsgtype()) { 
      return imsgviewtype.imvt_com_msg; 
    } else { 
      return imsgviewtype.imvt_to_msg; 
    } 
 
  } 
 
  public int getviewtypecount() { 
    // todo auto-generated method stub 
    return 2; 
  } 
 
  public view getview(int position, view convertview, viewgroup parent) { 
 
    final chatmsgentity entity = coll.get(position); 
    boolean iscommsg = entity.getmsgtype(); 
 
    viewholder viewholder = null; 
    if (convertview == null) { 
      if (iscommsg) { 
        convertview = minflater.inflate( 
            r.layout.chatting_item_msg_text_left, null); 
      } else { 
        convertview = minflater.inflate( 
            r.layout.chatting_item_msg_text_right, null); 
      } 
 
      viewholder = new viewholder(); 
      viewholder.tvsendtime = (textview) convertview 
          .findviewbyid(r.id.tv_sendtime); 
      viewholder.tvusername = (textview) convertview 
          .findviewbyid(r.id.tv_username); 
      viewholder.tvcontent = (textview) convertview 
          .findviewbyid(r.id.tv_chatcontent); 
      viewholder.tvtime = (textview) convertview 
          .findviewbyid(r.id.tv_time); 
      viewholder.iscommsg = iscommsg; 
 
      convertview.settag(viewholder); 
    } else { 
      viewholder = (viewholder) convertview.gettag(); 
    } 
 
    viewholder.tvsendtime.settext(entity.getdate()); 
     
    if (entity.gettext().contains(".amr")) { 
      viewholder.tvcontent.settext(""); 
      viewholder.tvcontent.setcompounddrawableswithintrinsicbounds(0, 0, r.drawable.chatto_voice_playing, 0); 
      viewholder.tvtime.settext(entity.gettime()); 
    } else { 
      viewholder.tvcontent.settext(entity.gettext());      
      viewholder.tvcontent.setcompounddrawableswithintrinsicbounds(0, 0, 0, 0); 
      viewholder.tvtime.settext(""); 
    } 
    viewholder.tvcontent.setonclicklistener(new onclicklistener() { 
       
      public void onclick(view v) { 
        if (entity.gettext().contains(".amr")) { 
          playmusic(android.os.environment.getexternalstoragedirectory()+"/"+entity.gettext()) ; 
        } 
      } 
    }); 
    viewholder.tvusername.settext(entity.getname()); 
     
    return convertview; 
  } 
 
  static class viewholder { 
    public textview tvsendtime; 
    public textview tvusername; 
    public textview tvcontent; 
    public textview tvtime; 
    public boolean iscommsg = true; 
  } 
 
  /** 
   * @description 
   * @param name 
   */ 
  private void playmusic(string name) { 
    try { 
      if (mmediaplayer.isplaying()) { 
        mmediaplayer.stop(); 
      } 
      mmediaplayer.reset(); 
      mmediaplayer.setdatasource(name); 
      mmediaplayer.prepare(); 
      mmediaplayer.start(); 
      mmediaplayer.setoncompletionlistener(new oncompletionlistener() { 
        public void oncompletion(mediaplayer mp) { 
 
        } 
      }); 
 
    } catch (exception e) { 
      e.printstacktrace(); 
    } 
 
  } 
 
  private void stop() { 
 
  } 
 
}

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