Android中的人机交互技术

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1.手势

java代码

package com.gst.user.myapplication;import android.gesture.Gesture;import android.gesture.GestureLibraries;import android.gesture.GestureLibrary;import android.gesture.GestureOverlayView;import android.gesture.Prediction;import android.os.Bundle;import android.support.design.widget.FloatingActionButton;import android.support.design.widget.Snackbar;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.util.Log;import android.view.View;import android.widget.Toast;import java.util.ArrayList;public class GestureActivity extends AppCompatActivity implements GestureOverlayView.OnGesturePerformedListener{    private static final String TAG = "GestureActivity";    GestureOverlayView gestureOverlayView;    GestureLibrary gestureLibrary;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_gesture);        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);        setSupportActionBar(toolbar);        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);        fab.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)                        .setAction("Action", null).show();            }        });        gestureOverlayView=(GestureOverlayView)findViewById(R.id.gestureOverlayView);//        gestureLibrary= GestureLibraries.fromRawResource(this, R.raw.gestures);        gestureLibrary=GestureLibraries.fromFile("/sdcard/mygestures");        if (gestureLibrary.load()) {            Toast.makeText(this,"加载文件成功",Toast.LENGTH_SHORT).show();            gestureOverlayView.addOnGesturePerformedListener(this);        }else {            Toast.makeText(this,"加载文件异常",Toast.LENGTH_SHORT).show();        }    }    @Override    public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {        ArrayList<Prediction> predictions=gestureLibrary.recognize(gesture);        if (predictions.size()>0) {            StringBuffer stringBuffer=new StringBuffer();            int n=0;            for (int i = 0; i < predictions.size(); i++) {                Prediction prediction=predictions.get(i);                if (prediction.score>1) {                    stringBuffer.append("score:" + prediction.score + "  name:"                            + prediction.name );                    n++;                }                Log.d(TAG,"score:" + prediction.score + "  name:"                        + prediction.name);            }            stringBuffer.insert(0,n + "个相匹配的手势.\n");            Toast.makeText(this,stringBuffer,Toast.LENGTH_SHORT).show();        }    }}

布局文件

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:app="http://schemas.android.com/apk/res-auto" 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"    app:layout_behavior="@string/appbar_scrolling_view_behavior"    tools:showIn="@layout/activity_gesture"    tools:context="com.gst.user.myapplication.GestureActivity">    <android.gesture.GestureOverlayView        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:id="@+id/gestureOverlayView"        android:gestureStrokeType="multiple"        android:layout_centerVertical="true"        android:layout_alignParentStart="true"></android.gesture.GestureOverlayView></RelativeLayout>

2.多点触摸

package com.gst.user.myapplication;import android.os.Bundle;import android.support.design.widget.FloatingActionButton;import android.support.design.widget.Snackbar;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.util.Log;import android.view.MotionEvent;import android.view.View;import com.lidroid.xutils.util.LogUtils;public class MutiTouchActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_muti_touch);        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);        setSupportActionBar(toolbar);        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);        fab.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)                        .setAction("Action", null).show();            }        });    }    @Override    public boolean onTouchEvent(MotionEvent event) {        if (event.getPointerCount()>=2&&event.getAction()==MotionEvent.ACTION_MOVE) {            int historySize=event.getHistorySize();            if (historySize==0){                return true;            }            float currentY1=event.getY(0);            float historyY1=event.getHistoricalY(0, historySize - 1);            float currentY2=event.getY(1);            float historyY2=event.getHistoricalY(1, historySize - 1);            float distance=Math.abs(currentY1 - currentY2);            float historyDistance=Math.abs(historyY1-historyY2);            if (distance > historyDistance) {                LogUtils.d("放大");            }else if (distance < historyDistance) {                LogUtils.d("缩小");            }else {                LogUtils.d("平行");            }        }        return super.onTouchEvent(event);    }}

3.语音识别及TTS

java代码

package com.gst.user.myapplication;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.speech.RecognizerIntent;import android.speech.tts.TextToSpeech;import android.support.design.widget.FloatingActionButton;import android.support.design.widget.Snackbar;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.view.View;import android.widget.TextView;import android.widget.Toast;import java.util.ArrayList;import java.util.Locale;public class VoiceRecognizeActivity extends AppCompatActivity implements TextToSpeech.OnInitListener {    private static final int RequestCode=1;    private TextToSpeech textToSpeech;    TextView textView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_voice_recognize);        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);        setSupportActionBar(toolbar);        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);        fab.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)                        .setAction("Action", null).show();            }        });        textView=(TextView)findViewById(R.id.textView);        textToSpeech=new TextToSpeech(this,this);    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        if (requestCode==RequestCode&&resultCode== Activity.RESULT_OK){            ArrayList<String> result=data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);            if (result.size()>0){                Toast.makeText(VoiceRecognizeActivity.this,result.get(0),Toast.LENGTH_LONG).show();            }        }        super.onActivityResult(requestCode, resultCode, data);    }    public void onClickVoiceRecongnize(View view){        Intent intent=new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_WEB_SEARCH);        intent.putExtra(RecognizerIntent.EXTRA_PROMPT,"语音输入");        startActivityForResult(intent, RequestCode);    }    public void onClickTTS(View view){        textToSpeech.speak(textView.getText().toString(),TextToSpeech.QUEUE_FLUSH,null);    }        @Override    public void onInit(int status) {        if (status == TextToSpeech.SUCCESS) {            int result=textToSpeech.setLanguage(Locale.US);            if (result==TextToSpeech.LANG_MISSING_DATA                    ||result==TextToSpeech.LANG_NOT_SUPPORTED){                Toast.makeText(this, "Language is not available.",                        Toast.LENGTH_SHORT).show();            }        }    }}

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    xmlns:app="http://schemas.android.com/apk/res-auto" 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"    app:layout_behavior="@string/appbar_scrolling_view_behavior"    tools:showIn="@layout/activity_voice_recognize"    tools:context="com.gst.user.myapplication.VoiceRecognizeActivity">    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/voice_recognize"        android:id="@+id/button"        android:onClick="onClickVoiceRecongnize"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="朗读"        android:onClick="onClickTTS"        android:id="@+id/button2"        android:layout_below="@+id/button"        android:layout_centerHorizontal="true"        android:layout_marginTop="49dp" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textAppearance="?android:attr/textAppearanceMedium"        android:text="@string/text"        android:id="@+id/textView"        android:layout_centerVertical="true"        android:layout_centerHorizontal="true" /></RelativeLayout>

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