android悬浮窗语音识别demo

带有android悬浮窗的语音识别语义理解demo

如发现代码排版问题，请访问CSDN博客

转载请注明CSDN博文地址：http://blog.csdn.net/ls0609/a...

在线听书demo：http://blog.csdn.net/ls0609/a...

语音记帐demo：http://blog.csdn.net/ls0609/a...

Android桌面悬浮窗实现比较简单，本篇以一个语音识别，语义理解的demo来演示如何实现android悬浮窗。
1.悬浮窗效果

桌面上待机的时候，悬浮窗吸附在边上

拖动远离屏幕边缘时图标变大，松开自动跑到屏幕边缘，距离屏幕左右边缘靠近哪边吸附哪边

点击悬浮图标时，启动录音

说完后能够点击左button，上传录音给服务器等待处理返回结果

服务器返回结果后自动跳转到应用界面，本例用的是在线听书，跳转到在线听书的界面

2.FloatViewIdle与FloatViewIdleService

1.FloatViewIdle

定义一个FloatViewIdle类，以下是该类的单例模式

public static synchronized FloatViewIdle getInstance(Context context)
{

if(floatViewManager == null)
    {
        mContext = context.getApplicationContext();;
        winManager = (WindowManager) 
                                mContext.getSystemService(Context.WINDOW_SERVICE);
        displayWidth = winManager.getDefaultDisplay().getWidth();
        displayHeight = winManager.getDefaultDisplay().getHeight();
        floatViewManager = new FloatViewIdle();
    }
    return floatViewManager;

}

利用winManager 的addview方法，把自定义的floatview添加到屏幕中，那么就会在任何界面显示该floatview，而后再屏蔽非待机界面隐藏floatview，这样就只有待机显示悬浮窗了。
定义两个自定义view，分别是FloatIconView和FloatRecordView，前者就是待机看到的小icon图标，后者是点击这个icon图标后展现的录音的那个界面。
下面来看下怎么定义的FloatIconView
class FloatIconView extends LinearLayout{

private int mWidth;
    private int mHeight;
    private int preX;
    private int preY;
    private int x;
    private int y;
    public boolean isMove;
    public boolean isMoveToEdge;    
    private FloatViewIdle manager;
    public ImageView imgv_icon_left;
    public ImageView imgv_icon_center;
    public ImageView imgv_icon_right;
    public int mWidthSide;

    public FloatIconView(Context context) {
        super(context);

        View view = LayoutInflater.from(mContext).
                                   inflate(R.layout.layout_floatview_icon, this);
        LinearLayout layout_content = 
                          (LinearLayout)  view.findViewById(R.id.layout_content);
        imgv_icon_left = (ImageView) view.findViewById(R.id.imgv_icon_left);
        imgv_icon_center = (ImageView) view.findViewById(R.id.imgv_icon_center);
        imgv_icon_right = (ImageView) view.findViewById(R.id.imgv_icon_right);
        imgv_icon_left.setVisibility(View.GONE);
        imgv_icon_center.setVisibility(View.GONE);

        mWidth = layout_content.getWidth();
        mHeight = layout_content.getHeight();
        if((mWidth == 0)||(mHeight == 0))
        {
            int temp = DensityUtil.dip2px(mContext, icon_width);
            mHeight = temp;
            icon_width_side_temp = DensityUtil.dip2px(mContext, icon_width_side);
            mWidth = icon_width_side_temp;
        }
        manager = FloatViewIdle.getInstance(mContext);
        if(params != null)
        {
            params.x = displayWidth - icon_width_side_temp;
            params.y = displayHeight/2;
        }
    }

    public int getFloatViewWidth()
    {
        return mWidth;
    }
    public int getFloatViewHeight()
    {
        return mHeight;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event)
    {
        switch(event.getAction())
        {
        case MotionEvent.ACTION_DOWN:
             preX = (int)event.getRawX();
             preY = (int)event.getRawY();
             isMove = false;
             if(params.width == icon_width_side_temp)
                 handler.sendMessage(handler.obtainMessage(
                                    MSG_UPDATE_FLOAT_VIEW_AFTER_CHANGED, 3, 0));
             break;
        case MotionEvent.ACTION_UP:              
             if(isMoveToEdge == true)
             {
                 if(params.width == icon_width_side_temp)
                     handler.sendMessage(handler.obtainMessage(
                                    MSG_UPDATE_FLOAT_VIEW_AFTER_CHANGED, 3, 0));
                 handler.sendMessage(handler.obtainMessage(
                                             MSG_FLOAT_VIEW_MOVE_TO_EDGE,this));                     
             }
             break;
        case MotionEvent.ACTION_MOVE:
             x = (int)event.getRawX();
             y = (int)event.getRawY();               
             if(Math.abs(x-preX)>1||Math.abs(y-preY)>1)
             {                   
              isMoveToEdge = true;
             }
             if(Math.abs(x-preX)>5||Math.abs(y-preY)>5)
                 isMove = true;
             if(params.width == icon_width_side_temp)
                 handler.sendMessage(handler.obtainMessage(
                                   MSG_UPDATE_FLOAT_VIEW_AFTER_CHANGED, 3, 0));
             manager.move(this, x-preX, y-preY);
             preX = x;
             preY = y;
             break;
        }
        return super.onTouchEvent(event);
    }

}

经过layout文件生成一个FloatIconView，在onTouchEvent函数中当按下的时候，发送消息更新悬浮view，抬起即up事件时先更新悬浮view，而后再显示吸附到边上的动画。 当move的时候，判断每次位移至少5和像素则更新view位置，这样不断move不断更新就会造成连续的画面。

另外一个FloatRecordView（录音的悬浮窗）道理相同，这里就不贴代码了，有兴趣能够下载demo本身编译跑一下。
在FloatIconView中定义一个handler，用于接收消息处理悬浮窗更新位置和吸附的动画

private void initHandler(){

handler = new Handler(){
          @Override
          public void handleMessage(Message msg) 
          {
                switch (msg.what) 
                {
                case MSG_REFRESH_VOLUME:
                    if(floatRecordView != null)
                        floatRecordView.updateVolume((int)msg.arg1);
                    break;
                case MSG_FLOAT_VIEW_MOVE_TO_EDGE:
                    //更新悬浮窗位置的动画
                    moveAnimation((View)msg.obj);
                    break;
                case MSG_REMOVE_FLOAT_VIEW:
                    if(msg.arg1 == 1)
                    {//此时已有floatview是floatIconView
                        if(floatIconView != null)
                        {//先移除一个floatview
                            winManager.removeView(floatIconView);
                            floatIconView = null;
                            floatRecordView = getFloatRecordView();
                            if(floatRecordView != null)
                            {   
                               if(floatRecordView.getParent() == null)
                               {//再加入一个新的floatview
                                  winManager.addView(floatRecordView, params);
                                  floatViewType = FLOAT_RECORD_VIEW_TYPE;
                               }
                               if(mHandler != null)
                               {
                                 mHandler.sendMessage(mHandler.obtainMessage(
                                         MessageConst.CLIENT_ACTION_START_CAPTURE));
                                 IS_RECORD_FROM_FLOAT_VIEW_IDLE = true;
                               }
                            }
                        }
                    }
                    else
                    {//此时已有floatview是floatRecordView即录音的floatview
                       if(floatRecordView != null)
                       {//先移除一个floatview
                           winManager.removeView(floatRecordView);
                           floatRecordView = null;
                       }
                       floatIconView = getFloatIconView();
                       if(floatIconView != null)
                       {
                          if(floatIconView.getParent() == null)
                          {/再加入一个新的floatview
                              winManager.addView(floatIconView, params);
                              floatViewType = FLOAT_ICON_VIEW_TYPE;
                              setViewOnClickListener(floatIconView);
                          }
                          //可能须要有吸附动画
                          moveAnimation(floatIconView);
                       }
                    }
                    break;
                case MSG_UPDATE_VIEW_SENDING_TO_SERVER:
                    if(floatRecordView != null)
                    {
                        floatRecordView.updateSendingToServerView();
                        floatRecordView.setTitle("努力识别中");
                    }
                    break;
                case MSG_UPDATE_ROTATE_VIEW:
                    if(floatRecordView != null)
                    {
                        floatRecordView.rotateview.startRotate();   
                    }
                    break;                  
                case MSG_UPDATE_FLOAT_VIEW_AFTER_CHANGED:
                    //1，2是吸附到左边仍是右边，3是拖动到中间显示放大的悬浮窗icon
                    if(msg.arg1 == 1)
                        changeFloatIconToSide(false);
                    else if(msg.arg1 == 2)
                        changeFloatIconToSide(true);
                    else if(msg.arg1 == 3)
                        changeFloatIconToNormal();              
                    break;
                case MSG_UPDATE_FLOAT_VIEW_ON_SIDE:
                    if(msg.arg1 == 1)
                        updateFloatIconOnSide(true);
                    else if(msg.arg1 == 2)
                        updateFloatIconOnSide(false);
                    break;
                case MSG_START_ACTIVITY:
                    hide();
                    Intent intent = new Intent(mContext,MusicActivity.class);
                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    intent.putExtra(START_FROM_FLOAT_VIEW, true);
                    IS_START_FROM_FLOAT_VIEW_IDLE = true;
                    mContext.startActivity(intent);
                    break;  
                }
          }
       };

}

那么，怎样作到点击吸附屏幕边缘的悬浮按钮，切换成录音的悬浮窗呢？
public void show()
{

isHide = false;

    floatIconView = getFloatIconView();
    if(floatIconView != null)
    {
         if(floatIconView.getParent() == null)
         {
              winManager.addView(floatIconView, params);
              floatViewType = FLOAT_ICON_VIEW_TYPE;
         }
         if(floatRecordView != null)
         {
             handler.sendMessage(handler.obtainMessage(
                                                   MSG_REMOVE_FLOAT_VIEW, 2, 0));       
         }
         floatIconView.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View v) {
                if(floatIconView.isMove || floatIconView.isMoveToEdge)
                {
                    floatIconView.isMove = false;
                    return;
                }
                winManager.removeView(floatIconView);
                floatIconView = null;
                floatRecordView = getFloatRecordView();
                if(floatRecordView != null)
                {
                    if(floatRecordView.getParent() == null)
                    {
                        winManager.addView(floatRecordView, params);
                        floatViewType = FLOAT_RECORD_VIEW_TYPE;
                    }
                    if(mHandler != null)
                    {
                      mHandler.sendMessage(mHandler.obtainMessage(
                                     MessageConst.CLIENT_ACTION_START_CAPTURE));
                      IS_RECORD_FROM_FLOAT_VIEW_IDLE = true;
                    }
                }

            }                
         });
    }

}

在show函数中，设置了floatIconView的点击事件，移除小的悬浮吸附按钮，加入录音的悬浮窗view并启动录音。

2.FloatViewIdleService

为何要定义这个service？

这个service用途是，定时扫描是否在待机桌面，若是是待机桌面则显示floatview，不然隐藏。

public class FloatViewIdleService extends Service {

private static Handler mHandler;  
private FloatViewIdle floatViewIdle;
private final static int REFRESH_FLOAT_VIEW = 1;
private boolean is_vertical = true;
@Override
public void onCreate() {
    super.onCreate();
    initHandler();      
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    mHandler.sendMessageDelayed(mHandler.obtainMessage(REFRESH_FLOAT_VIEW), 500);
    FloatViewIdle.IS_START_FROM_FLOAT_VIEW_IDLE = false;
    is_vertical = true;
    return START_STICKY;
}
protected void initHandler() {
    mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
            case REFRESH_FLOAT_VIEW://1s发送一次更新floatview消息
                updateFloatView();
                mHandler.sendMessageDelayed(
                           mHandler.obtainMessage(REFRESH_FLOAT_VIEW), 1000);
                break;
            }
        }
    };
}

 private void updateFloatView()
 {
    boolean isOnIdle = isHome();//判断是否在待机界面
    floatViewIdle = FloatViewIdle.getInstance(FloatViewIdleService.this);       
    if(isOnIdle)
    { //待机界面则显示floatview            
        if(floatViewIdle.getFloatViewType() == 0)
        {               
            floatViewIdle.show();
        }
        else if(floatViewIdle.getFloatViewType() == 
                                    floatViewIdle.FLOAT_ICON_VIEW_TYPE||  
                floatViewIdle.getFloatViewType() == 
                                    floatViewIdle.FLOAT_RECORD_VIEW_TYPE)
        {
            if(this.getResources().getConfiguration().orientation ==
                                      Configuration.ORIENTATION_LANDSCAPE) 
            {
                if(is_vertical == true)
                {
                   floatViewIdle.swapWidthAndHeight();  
                   is_vertical = false;
                }
            }
            else if(this.getResources().getConfiguration().orientation == 
                                           Configuration.ORIENTATION_PORTRAIT)
            {
                if(is_vertical == false)
                {
                   floatViewIdle.swapWidthAndHeight();
                   is_vertical = true;
                }
            }   
        }
    }
    else
    {//不然隐藏floatview
        floatViewIdle.hide();               
    }
 }

 private boolean isHome() 
 {  
    ActivityManager mActivityManager = (ActivityManager) 
                                   getSystemService(Context.ACTIVITY_SERVICE);  
    List<RunningTaskInfo> rti = mActivityManager.getRunningTasks(1); 
    try{ 
    if(rti.size() == 0)
    {
        return true;
    }else
    {
        if(rti.get(0).topActivity.getPackageName().
                                           equals("com.olami.floatviewdemo"))
            return false;
        else
            return getHomes().contains(rti.get(0).topActivity.getPackageName()); 
        }
    }
    catch(Exception e)
    {       
       return true;
    }
 }  

 private List<String> getHomes() 
 {  
    List<String> names = new ArrayList<String>();  
    PackageManager packageManager = this.getPackageManager();  
    Intent intent = new Intent(Intent.ACTION_MAIN);  
    intent.addCategory(Intent.CATEGORY_HOME);  
    List<ResolveInfo> resolveInfo = packageManager.queryIntentActivities(intent,  
            PackageManager.MATCH_DEFAULT_ONLY);  
    for (ResolveInfo ri : resolveInfo) {  
        names.add(ri.activityInfo.packageName);  
    }  
    return names;  
 }  

@Override
public void onDestroy() {
    super.onDestroy();
    if(floatViewIdle != null)
       floatViewIdle.setFloatViewType(0);
}
@Override
public IBinder onBind(Intent intent) {
    return null;
}

}

3.启动语音识别

在另外一个VoiceSdkService（另外一个处理录音服务业务的service）中，当接收到悬浮窗按钮点击事件消息时，则启动录音服务，录音结束后会在onResult回调中收到服务器返回的结果。

本例用的是olami语音识别，语义理解引擎，olami支持强大的用户自定义语义，能更好的解决语义理解。
好比同义理解的时候，我要听三国演义，我想听三国演义，听三国演义这本书，相似的说法有不少，olmai就能够为你解决这类的语义理解，olami语音识别引擎使用比较简单，只须要简单的初始化，而后设置好回调listener，在回调的时候处理服务器返回的json字符串便可，固然语义仍是要用户本身定义的。

public void init()
{

initHandler();
mOlamiVoiceRecognizer = new OlamiVoiceRecognizer(VoiceSdkService.this);
TelephonyManager telephonyManager=(TelephonyManager) this.getSystemService(
(this.getBaseContext().TELEPHONY_SERVICE);
String imei=telephonyManager.getDeviceId();
mOlamiVoiceRecognizer.init(imei);//设置身份标识，能够填null

mOlamiVoiceRecognizer.setListener(mOlamiVoiceRecognizerListener);//设置识别结果回调listener
mOlamiVoiceRecognizer.setLocalization(
OlamiVoiceRecognizer.LANGUAGE_SIMPLIFIED_CHINESE);//设置支持的语音类型，优先选择中文简体
mOlamiVoiceRecognizer.setAuthorization("51a4bb56ba954655a4fc834bfdc46af1",
                        "asr","68bff251789b426896e70e888f919a6d","nli");  
//注册Appkey，在olami官网注册应用后生成的appkey
//注册api，请直接填写“asr”，标识语音识别类型
//注册secret，在olami官网注册应用后生成的secret
//注册seq ，请填写“nli”

mOlamiVoiceRecognizer.setVADTailTimeout(2000);//录音时尾音结束时间，建议填//2000ms
//设置经纬度信息，不肯上传位置信息，能够填0 
mOlamiVoiceRecognizer.setLatitudeAndLongitude(31.155364678184498,121.34882432933009);

在VoiceSdkService中定义OlamiVoiceRecognizerListener用于处理录音时的回调
onError(int errCode)//出错回调，能够对比官方文档错误码看是什么错误
onEndOfSpeech()//录音结束
onBeginningOfSpeech()//录音开始
onResult(String result, int type)//result是识别结果JSON字符串
onCancel()//取消识别，不会再返回识别结果
onUpdateVolume(int volume)//录音时的音量，1-12个级别大小音量

本文用的是在线听书的例子，当收到服务器返回的消息是，进入以下函数：

在下面的函数中，经过解析服务器返回的json字符串，提取用户须要的语义理解字段进行处理

private void processServiceMessage(String message)

{
    String input = null;
    String serverMessage = null;
    try{
        JSONObject jsonObject = new JSONObject(message);
        JSONArray jArrayNli = jsonObject.optJSONObject("data").optJSONArray("nli");
        JSONObject jObj = jArrayNli.optJSONObject(0);
        JSONArray jArraySemantic = null;
        if(message.contains("semantic"))
          jArraySemantic = jObj.getJSONArray("semantic");
        else{
            input = jsonObject.optJSONObject("data").optJSONObject("asr").
            optString("result");
            sendMessageToActivity(MessageConst.
                                 CLIENT_ACTION_UPDATA_INPUT_TEXT, 0, 0, null, input);
            serverMessage = jObj.optJSONObject("desc_obj").opt("result").toString();
            sendMessageToActivity(MessageConst.
                    CLIENT_ACTION_UPDATA_SERVER_MESSAGE, 0, 0, null, serverMessage);
            return;
        }
        JSONObject jObjSemantic;
        JSONArray jArraySlots;
        JSONArray jArrayModifier;
        String type = null;
        String songName = null;
        String singer = null;

if(jObj != null) {
            type = jObj.optString("type");
            if("musiccontrol".equals(type))
            {
                jObjSemantic = jArraySemantic.optJSONObject(0);
                input = jObjSemantic.optString("input");
                jArraySlots = jObjSemantic.optJSONArray("slots");
                jArrayModifier = jObjSemantic.optJSONArray("modifier");
                String modifier = (String)jArrayModifier.opt(0);
                if((jArrayModifier != null) && ("play".equals(modifier)))
                {
                    if(jArraySlots != null)
                       for(int i=0,k=jArraySlots.length(); i<k; i++)
                       {
                           JSONObject obj = jArraySlots.getJSONObject(i);
                           String name = obj.optString("name");
                           if("singer".equals(name))
                               singer = obj.optString("value");
                           else if("songname".equals(name))
                               songName = obj.optString("value");

                       }
                }else if((modifier != null) && ("stop".equals(modifier)))
                {
                    if(mBookUtil != null)
                        if(mBookUtil.isPlaying())
                            mBookUtil.stop();
                }else if((modifier != null) && ("pause".equals(modifier)))
                {
                    if(mBookUtil != null)
                        if(mBookUtil.isPlaying())
                            mBookUtil.pause();
                }else if((modifier != null) && ("resume_play".equals(modifier)))
                {
                    if(mBookUtil != null)
                        mBookUtil.resumePlay();
                }else if((modifier != null) && ("add_volume".equals(modifier)))
                {
                    if(mBookUtil != null)
                        mBookUtil.addVolume();
                }else if((modifier != null) && ("del_volume".equals(modifier)))
                {
                    if(mBookUtil != null)
                        mBookUtil.delVolume();
                }else if((modifier != null) && ("next".equals(modifier)))
                {
                    if(mBookUtil != null)
                        mBookUtil.next();
                }else if((modifier != null) && ("previous".equals(modifier)))
                {
                    if(mBookUtil != null)
                        mBookUtil.prev();
                }else if((modifier != null) && ("play_index".equals(modifier)))
                {
                    int position = 0;
                    if(jArraySlots != null)
                           for(int i=0,k=jArraySlots.length(); i<k; i++)
                           {
                               JSONObject obj = jArraySlots.getJSONObject(i);
                               JSONObject jNumDetial = obj.getJSONObject("num_detail");
                               String index = jNumDetial.optString("recommend_value");
                               position = Integer.parseInt(index) - 1;
                           }
                    if(mBookUtil != null)
                        mBookUtil.skipTo(position);
                }
            }
        }
        if(songName != null)
        {
            if(singer != null)
            {

            }else{
                mBookUtil.searchBookAndPlay(songName,0,0);
            }
        }else if(singer != null)
        {
            mBookUtil.searchBookAndPlay(songName,0,0);
        }
        serverMessage = jObj.optJSONObject("desc_obj").opt("result").toString();
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
    //发送消息更新语音识别的文字
    sendMessageToActivity(MessageConst.CLIENT_ACTION_UPDATA_INPUT_TEXT, 0, 0, null, input);
    //发送消息更新服务器返回的结果字符串
    sendMessageToActivity(MessageConst.CLIENT_ACTION_UPDATA_SERVER_MESSAGE, 
                                                0, 0, null, serverMessage);

}

以我要听三国演义这句语音，服务器返回的数据以下：

{

"data": {
    "asr": {
        "result": "我要听三国演义",
        "speech_status": 0,
        "final": true,
        "status": 0
    },
    "nli": [
        {
            "desc_obj": {
                "result": "正在努力搜索中，请稍等",
                "status": 0
            },
            "semantic": [
                {
                    "app": "musiccontrol",
                    "input": "我要听三国演义",
                    "slots": [
                        {
                            "name": "songname",
                            "value": "三国演义"
                        }
                    ],
                    "modifier": [
                        "play"
                    ],
                    "customer": "58df512384ae11f0bb7b487e"
                }
            ],
            "type": "musiccontrol"
        }
    ]
},
"status": "ok"

}

1）解析出nli中type类型是musiccontrol,这是语法返回app的类型，而这个在线听书的demo只关心musiccontrol这 个app类型，其余的忽略。
2）用户说的话转成文字是在asr中的result中获取
3）在nli中的semantic中，input值是用户说的话，同asr中的result。
modifier表明返回的行为动做，此处能够看到是play就是要求播放，slots中的数据表示歌曲名称是三国演义。
那么动做是play，内容是歌曲名称是三国演义，在这个demo中调用
mBookUtil.searchBookAndPlay(songName,0,0);会先查询，查询到结果会再发播放消息要求播放，我要听三国演义这个流程就走完了。

关于在线听书请看博文：http://blog.csdn.net/ls0609/a...

4.源码下载连接

http://pan.baidu.com/s/1o8OELdC

5.相关连接

语音记帐demo：http://blog.csdn.net/ls0609/a...

olami开放平台语法编写简介：http://blog.csdn.net/ls0609/a...

olami开放平台语法官方介绍：https://cn.olami.ai/wiki/?mp=...