为什么在触摸Android屏幕时却什么也没做？

Question

This is the MainActivity.java

package com.test.webservertest;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.support.v7.app.ActionBarActivity;
import android.util.AndroidRuntimeException;
import android.util.Xml;
import android.view.Menu;
import android.view.MenuItem;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.content.Context;
import android.view.View.OnClickListener;

import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.util.EncodingUtils;
import org.json.JSONObject;
import org.json.JSONTokener;

import java.io.DataOutputStream;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.Socket;
import java.net.URL;
import java.net.UnknownHostException;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Locale;
import java.net.URLConnection;

import java.net.HttpURLConnection;
import java.io.*;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.logging.Logger;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity
{
    private static final int MY_DATA_CHECK_CODE = 0;
    public static MainActivity currentActivity;
    TextToSpeech mTts;
    private String targetURL;
    private String urlParameters;
    private Button btnClick;
    private String clicking = "clicked";
    private final String[] ipaddresses = new String[2];
    private final Integer[] ipports = new Integer[2];
    private TextView text;
    private Socket socket;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //setContentView(new SingleTouchEventView(this, null));

        /*ipaddresses[0] = "10.0.0.3";
        ipaddresses[1] = "10.0.0.2";
        ipports[0] = 8098;
        ipports[1] = 8088;*/

        //addListenerOnButton();
        currentActivity = this;
        initTTS();
    }

    public void addListenerOnButton() {

        /*btnClick = (Button) findViewById(R.id.checkipbutton);

        btnClick.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View arg0)
            {
                text = (TextView) findViewById(R.id.textView2);
                try
                {

                } catch (Exception e)
                {
                    text.setText("Connection Failed");
                }
            }
        });*/
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings)
        {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * Dispatch onStart() to all fragments.  Ensure any created loaders are
     * now started.
     */   

    @Override
    protected void onStart()
    {
        super.onStart();
        TextToSpeechServer.main(null);
    }

    @Override
    protected void onStop() {
        super.onStop();
    }

    public void initTTS() {
        Intent checkIntent = new Intent();
        checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
        startActivityForResult(checkIntent, MY_DATA_CHECK_CODE);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(requestCode == MY_DATA_CHECK_CODE) {
            if(resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
                mTts = new TextToSpeech(getApplicationContext(), new OnInitListener() {
                    @Override
                    public void onInit(int i) {

                        if(i == TextToSpeech.SUCCESS) {
                            int result = mTts.setLanguage(Locale.US);
                            if(result == TextToSpeech.LANG_AVAILABLE
                                    || result == TextToSpeech.LANG_COUNTRY_AVAILABLE) {
                                mTts.setPitch(1);
                                mTts.speak(textforthespeacch, TextToSpeech.QUEUE_FLUSH, null);
                            }
                        }
                    }
                });
            } else {
                Intent installIntent = new Intent();
                installIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
                startActivity(installIntent);
            }
        }
    }

    public static String textforthespeacch = "";
    public static void TextToSpeak(String text) {
        textforthespeacch = text;
    }

    private boolean is_start = true;
    public class SingleTouchEventView extends View {
        private Paint paint = new Paint();
        private Path path = new Path();
        private Path circlePath = new Path();

        public SingleTouchEventView(Context context, AttributeSet attrs) {
            super(context, attrs);

            paint.setAntiAlias(true);
            paint.setStrokeWidth(6f);
            paint.setColor(Color.BLACK);
            paint.setStyle(Paint.Style.STROKE);
            paint.setStrokeJoin(Paint.Join.ROUND);
        }

        @Override
        protected void onDraw(Canvas canvas) {
            canvas.drawPath(path, paint);
            canvas.drawPath(circlePath, paint);
        }

        @Override
        public boolean onTouchEvent(MotionEvent event)
        {
            float eventX = event.getX();
            float eventY = event.getY();

            float lastdownx = 0;
            float lastdowny = 0;

            switch (event.getAction())
            {
                case MotionEvent.ACTION_DOWN:
                    path.moveTo(eventX, eventY);
                    circlePath.addCircle(eventX, eventY, 50, Path.Direction.CW);
                    lastdownx = eventX;
                    lastdowny = eventY;

                    Thread t = new Thread(new Runnable()
                    {
                        @Override
                        public void run()
                        {
                            byte[] response = null;
                            if (is_start == true)
                            {
                                response = Get("http://10.0.0.2:8098/?cmd=start");
                                is_start = false;
                            }
                            else
                            {
                               response = Get("http://10.0.0.2:8098/?cmd=stop");
                                is_start = true;
                            }

                            if (response!=null)
                            {
                                String a = null;
                                try
                                {
                                    a = new String(response,"UTF-8");
                                    textforthespeacch = a;
                                    MainActivity.currentActivity.initTTS();
                                } catch (UnsupportedEncodingException e)
                                {
                                    e.printStackTrace();
                                }
                                Logger.getLogger("MainActivity(inside thread)").info(a);
                            }
                        }
                    });
                    t.start();
                    return true;
                case MotionEvent.ACTION_MOVE:
                    path.lineTo(eventX, eventY);
                    break;
                case MotionEvent.ACTION_UP:
                    // nothing to do
                    circlePath.reset();   
                    break;
                default:
                    return false;
            }    
            // Schedules a repaint.
            invalidate();
            return true;
        }
    }

    private byte[] Get(String urlIn)
    {
        URL url = null;

        String urlStr = urlIn;

        if (urlIn!=null)
            urlStr=urlIn;

        try
        {
            url = new URL(urlStr);
        } catch (MalformedURLException e)
        {
            e.printStackTrace();
            return null;
        }
        HttpURLConnection urlConnection = null;
        try
        {

            urlConnection = (HttpURLConnection) url.openConnection();
            InputStream in = new BufferedInputStream(urlConnection.getInputStream());

            byte[] buf=new byte[10*1024];
            int szRead = in.read(buf);

            byte[] bufOut;   
            if (szRead==10*1024)
            {
                throw new AndroidRuntimeException("the returned data is bigger than 10*1024.. we don't handle it..");
            }
            else
            {
                bufOut = Arrays.copyOf(buf, szRead);
            }
            return bufOut;
        }
        catch (IOException e)
        {
            e.printStackTrace();
            return null;
        }
        finally
        {
            if (urlConnection!=null)
                urlConnection.disconnect();
        }
    }
}

It was working fine. Maybe I need to enable something on my Android device?

My Android device is connected now to the PC via USB and working fine.

When I'm running my program in debug mode and touch the screen it never stop on:

@Override
        public boolean onTouchEvent(MotionEvent event)
        {
            float eventX = event.getX();

I added a break point on the line: float eventX = event.getX(); But touching the screen does nothing.

Answer 1

You are not at all registering the OnTouchListener. First register OnTouchListener using anonymousclass or just implements it in your class

From your code you need the listener for this SingleTouchEventView view. Just add " implements View.OnTouchListenter " for the class. Because you have already overridden onTouch method in your code.

Answer 2

You have to change your style.xml when you remove "Extends ActionbarActivity"! Check this change appTheme