Android(安卓)TTS 实战五：摇一摇输入

应用功能：摇一摇手机，自动连接Google Voice ，可以将语音转成文本

步骤：

1. 在 AndroidMainfest.xml 中添加权限：<uses-sdk android:minSdkVersion="7"/>

2.布局

<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:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:paddingBottom="@dimen/activity_vertical_margin"    tools:context=".MainActivity$PlaceholderFragment">    <TextView        android:text="shake"        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:text="voice"        android:id="@+id/textView2"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

3.代码分为两个类：

主类：

package com.example.shakeilikeactivity;import android.app.Activity;import android.content.ActivityNotFoundException;import android.content.Intent;import android.os.Bundle;import android.speech.RecognizerIntent;import android.widget.TextView;import android.widget.Toast;import java.util.ArrayList;public class MainActivity extends Activity {    ShakeListener mShakeListener = null;    private static final int VOICE_RECOGNITION = 83;    private TextView tv1;    private TextView tv2;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        this.setContentView(R.layout.fragment_main);        tv1=(TextView)this.findViewById(R.id.textView1);        tv2=(TextView)this.findViewById(R.id.textView2);        mShakeListener = new ShakeListener(this);        mShakeListener.setOnShakeListener(new ShakeListener.OnShakeListener() {            @Override            public void onShake() {                tv1.setText("摇一摇成功啦！");                Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);                intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,                        RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);                intent.putExtra(RecognizerIntent.EXTRA_PROMPT,                        "Speech recognition demo");             //设置语音识别Intent调用的特定属性参数                try {                    //启动一个要求有返回值的activity调用                    startActivityForResult(intent, VOICE_RECOGNITION);                    tv2.setText("");                } catch (ActivityNotFoundException a) {                    Toast t = Toast.makeText(getApplicationContext(),                            "Opps! Your device doesn't support Speech to Text",                            Toast.LENGTH_SHORT);                    t.show();                }                //mShakeListener.stop();            }        });    }    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        switch (requestCode) {            case VOICE_RECOGNITION: {                if (resultCode == RESULT_OK && null != data) {                    ArrayList<String> text = data                            .getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);                    tv2.setText(text.get(0));                }                break;            }        }    }}

监听类实现：

package com.example.shakeilikeactivity;import android.content.Context;import android.hardware.Sensor;import android.hardware.SensorEvent;import android.hardware.SensorEventListener;import android.hardware.SensorManager;import android.util.Log;public class ShakeListener implements SensorEventListener {    String TAG = "ShakeListener";    // 速度阈值，当摇晃速度达到这值后产生作用    private static final int SPEED_SHRESHOLD = 3000;    // 两次检测的时间间隔    private static final int UPTATE_INTERVAL_TIME = 70;    // 传感器管理器    private SensorManager sensorManager;    // 传感器    private Sensor sensor;    // 重力感应监听器    private OnShakeListener onShakeListener;    // 上下文    private Context mContext;    // 手机上一个位置时重力感应坐标    private float lastX;    private float lastY;    private float lastZ;    // 上次检测时间    private long lastUpdateTime;    // 构造器    public ShakeListener(Context c) {        // 获得监听对象        mContext = c;        start();    }    // 开始    public void start() {        // 获得传感器管理器        sensorManager = (SensorManager) mContext                .getSystemService(Context.SENSOR_SERVICE);        if (sensorManager != null) {            // 获得重力传感器            sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);        }        // 注册        if (sensor != null) {            sensorManager.registerListener(this, sensor,                    SensorManager.SENSOR_DELAY_GAME);        }    }    // 停止检测    public void stop() {        sensorManager.unregisterListener(this);    }    // 设置重力感应监听器    public void setOnShakeListener(OnShakeListener listener) {        onShakeListener = listener;    }    // 重力感应器感应获得变化数据    public void onSensorChanged(SensorEvent event) {        // 现在检测时间        long currentUpdateTime = System.currentTimeMillis();        // 两次检测的时间间隔        long timeInterval = currentUpdateTime - lastUpdateTime;        // 判断是否达到了检测时间间隔        if (timeInterval < UPTATE_INTERVAL_TIME)            return;        // 现在的时间变成last时间        lastUpdateTime = currentUpdateTime;        // 获得x,y,z坐标        float x = event.values[0];        float y = event.values[1];        float z = event.values[2];        // 获得x,y,z的变化值        float deltaX = x - lastX;        float deltaY = y - lastY;        float deltaZ = z - lastZ;        // 将现在的坐标变成last坐标        lastX = x;        lastY = y;        lastZ = z;        double speed = Math.sqrt(deltaX * deltaX + deltaY * deltaY + deltaZ                * deltaZ)                / timeInterval * 10000;        Log.v(TAG, "===========log===================");        // 达到速度阀值，发出提示        if (speed >= SPEED_SHRESHOLD) {            onShakeListener.onShake();        }    }    public void onAccuracyChanged(Sensor sensor, int accuracy) {    }    // 摇晃监听接口    public interface OnShakeListener {        public void onShake();    }}

完工

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