Android中的人机交互技术

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 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

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 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();
              }
          }
  
      }
  }

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