语言识别和聊天机器人的实现

安卓上面语音识别和聊天机器人是非常常见也是非常实用的功能，在这里主要分享一款非常著名的语言平台，科大迅飞开放平台。

首先从官网下载一个sdk的包，如下图：

我们可以新建一个安卓工程，取名Robot,将下载下来的文件中的libs中的文件拷贝到我们的项目中的libs目录下，然后写一下布局文件：

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/lv_list"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:divider="@null"
        android:layout_weight="1" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/bottom_bar"
        android:gravity="center"
        android:orientation="vertical" >

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:background="@drawable/btn_selector"
            android:onClick="startListen"
            android:text="点击开始语音识别"
            android:textColor="#000"
            android:textSize="16sp" />
    </LinearLayout>

</LinearLayout>

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/tv_ask"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_margin="5dp"
        android:background="@drawable/asker_bubble"
        android:gravity="center"
        android:text="你吃饭了吗?"
        android:textColor="#000"
        android:textSize="16sp" />

    <LinearLayout
        android:id="@+id/ll_answer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/tv_ask"
        android:layout_margin="5dp"
        android:background="@drawable/answer_bubble"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/tv_answer"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="5dp"
            android:text=""
            android:textColor="#000"
            android:textSize="16sp" />

        <ImageView
            android:id="@+id/iv_pic"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/m"
            android:visibility="gone" />
    </LinearLayout>

</RelativeLayout>

界面效果如下：

我们可以在主界面中实现上面的功能：

// 初始化语音引擎
SpeechUtility.createUtility(this, SpeechConstant.APPID + "=54b8bca3");

/**
	 * 语音朗诵
	 */
	public void read(String text) {
		SpeechSynthesizer mTts = SpeechSynthesizer
				.createSynthesizer(this, null);

		mTts.setParameter(SpeechConstant.VOICE_NAME, "xiaoyan");
		mTts.setParameter(SpeechConstant.SPEED, "50");
		mTts.setParameter(SpeechConstant.VOLUME, "80");
		mTts.setParameter(SpeechConstant.ENGINE_TYPE, SpeechConstant.TYPE_CLOUD);

		mTts.startSpeaking(text, null);
	}

	/**
	 * 开始语音识别
	 * 
	 * @param view
	 */
	public void startListen(View view) {
		RecognizerDialog iatDialog = new RecognizerDialog(this, null);

		// 2.设置听写参数，详见《科大讯飞MSC API手册(Android)》SpeechConstant类
		iatDialog.setParameter(SpeechConstant.DOMAIN, "iat");
		iatDialog.setParameter(SpeechConstant.LANGUAGE, "zh_cn");
		iatDialog.setParameter(SpeechConstant.ACCENT, "mandarin");

		iatDialog.setListener(recognizerDialogListener);

		iatDialog.show();
	}

	class ChatAdapter extends BaseAdapter {

		@Override
		public int getCount() {
			return mChatList.size();
		}

		@Override
		public ChatBean getItem(int position) {
			return mChatList.get(position);
		}

		@Override
		public long getItemId(int position) {
			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			ViewHolder holder;
			if (convertView == null) {
				holder = new ViewHolder();
				convertView = View.inflate(MainActivity.this,
						R.layout.list_item, null);

				holder.tvAsk = (TextView) convertView.findViewById(R.id.tv_ask);
				holder.tvAnswer = (TextView) convertView
						.findViewById(R.id.tv_answer);
				holder.llAnswer = (LinearLayout) convertView
						.findViewById(R.id.ll_answer);
				holder.ivPic = (ImageView) convertView
						.findViewById(R.id.iv_pic);

				convertView.setTag(holder);
			} else {
				holder = (ViewHolder) convertView.getTag();
			}

			ChatBean item = getItem(position);

			if (item.isAsker) {// 是提问者
				holder.tvAsk.setVisibility(View.VISIBLE);
				holder.llAnswer.setVisibility(View.GONE);

				holder.tvAsk.setText(item.text);
			} else {
				holder.tvAsk.setVisibility(View.GONE);
				holder.llAnswer.setVisibility(View.VISIBLE);
				holder.tvAnswer.setText(item.text);
				if (item.imageId != -1) {// 有图片
					holder.ivPic.setVisibility(View.VISIBLE);
					holder.ivPic.setImageResource(item.imageId);
				} else {
					holder.ivPic.setVisibility(View.GONE);
				}
			}

			return convertView;
		}

	}

	static class ViewHolder {
		public TextView tvAsk;
		public TextView tvAnswer;
		public LinearLayout llAnswer;
		public ImageView ivPic;
	}

	/**
	 * 解析语音数据
	 * 
	 * @param resultString
	 */
	protected String parseData(String resultString) {
		Gson gson = new Gson();
		VoiceBean bean = gson.fromJson(resultString, VoiceBean.class);
		ArrayList<WSBean> ws = bean.ws;

		StringBuffer sb = new StringBuffer();
		for (WSBean wsBean : ws) {
			String text = wsBean.cw.get(0).w;
			sb.append(text);
		}

		return sb.toString();
	}

当启动的时候是这样的

更多的功能我们可以去看开发者文档。