Android Studio 在拍照后通过套接字发送字符串 [Google Glass]

Question

我想做什么：

User says "find my keys" Google glass takes a picture and stores a string of what you said in a socket to be sent on a port. A second socket is created to send the picture, so the receiver has the voice string and picture in order for further processing.

问题：

拍照后，我有一些 Toast.makeText 消息以及套接字创建，由于某种原因被忽略了。

所有套接字创建都在 onActivityResult 下进行语音检测发生在 onCreate

代码如下：

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.FileObserver;
import android.provider.MediaStore;
import android.speech.RecognizerIntent;
import android.util.Log;
import android.widget.Toast;
import com.google.android.glass.content.Intents;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;

public class CameraActivity extends Activity {

    private CameraSurfaceView cameraView;


    private static final int TAKE_PICTURE_REQUEST = 1;

    //Take the picture only if the string take_picture from voice control allows for it.
    private void takePicture() {

        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(intent, TAKE_PICTURE_REQUEST);
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(resultCode != RESULT_CANCELED)
        {


            if (requestCode == TAKE_PICTURE_REQUEST && resultCode == RESULT_OK) {
                String thumbnailPath = data.getStringExtra(Intents.EXTRA_THUMBNAIL_FILE_PATH);
                String picturePath = data.getStringExtra(Intents.EXTRA_PICTURE_FILE_PATH);

                processPictureWhenReady(picturePath);
                Toast.makeText(getApplicationContext(), "Proceeding to Socket creation.", Toast.LENGTH_LONG).show();

                //Create the java socket and send the file to the android device
                //Need to send out the voice command to the Android phone and the picture
                //for now, send the voice data

                try {

                    Toast.makeText(getApplicationContext(), "Socket created on port 40404", Toast.LENGTH_LONG).show();

                    try {
                        //Define the socket:
                        //Firewall problem.
                        Socket skt = new Socket(InetAddress.getLocalHost(), 40404);
                        //Send the voice data
                        OutputStream outstream = skt.getOutputStream();
                        PrintWriter out = new PrintWriter(outstream);
                        Toast.makeText(getApplicationContext(), "Sending data to Android Device", Toast.LENGTH_LONG).show();
                        out.print(voiceglobal);

                        //The commented out code below will eventually send the picture that you take with the device over a socket
                        //to a recieving device.You can ignore this for now.


                        //long length = pictureToSend.length();

                        //Create a new socket for sending the picture.
                            /*
                            Socket pic_socket = new Socket(InetAddress.getLocalHost(), 50505);
                            byte bytes[];
                            ObjectInputStream ois = new ObjectInputStream(pic_socket.getInputStream());
                            FileOutputStream fos = null;
                            try {
                                bytes = (byte[])ois.readObject();
                                fos = new FileOutputStream(pictureToSend);
                                fos.write(bytes);
                            } catch (ClassNotFoundException e)
                            {
                                e.printStackTrace();

                            } finally {
                                if(fos!= null)
                                {
                                    fos.close();
                                }
                            }
                            */
                        //////////////////////////////////////////////
                        //////////////////


                    } catch (UnknownHostException e) {

                        //Handle this.
                        System.err.print(e);
                    }
                } catch (IOException v) {
                   // handle this.
                    System.err.print(v);
                    }
            }

            //Define the socket:

            //Make sure this works and then write the code for


            /////////////////////////////////////////////////////////////////////////
            //////////////////////////////////////////////////////////////////////


        } //if resultCode != RESULT_CANCELED

        super.onActivityResult(requestCode, resultCode, data);
    }

    //Define global path to picture file.
    //Test the path by using the recieving connection.
    File pictureToSend;


    private void processPictureWhenReady(final String picturePath) {
        final File pictureFile = new File(picturePath);
        ////////////////////////////////////////////////////////
        //////
        pictureToSend = pictureFile; //Global for sending the picture.
        ////////////////////////////////////////////////////////
        /////

        if (pictureFile.exists()) {
            // The picture is ready; process it.

        } else {
            // The file does not exist yet. Before starting the file observer, you
            // can update your UI to let the user know that the application is
            // waiting for the picture (for example, by displaying the thumbnail
            // image and a progress indicator).

            final File parentDirectory = pictureFile.getParentFile();
            FileObserver observer = new FileObserver(parentDirectory.getPath(),
                    FileObserver.CLOSE_WRITE | FileObserver.MOVED_TO) {
                // Protect against additional pending events after CLOSE_WRITE
                // or MOVED_TO is handled.
                private boolean isFileWritten;

                @Override
                public void onEvent(int event, String path) {
                    if (!isFileWritten) {
                        // For safety, make sure that the file that was created in
                        // the directory is actually the one that we're expecting.
                        File affectedFile = new File(parentDirectory, path);
                        isFileWritten = affectedFile.equals(pictureFile);

                        if (isFileWritten) {
                            stopWatching();

                            // Now that the file is ready, recursively call
                            // processPictureWhenReady again (on the UI thread).
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    processPictureWhenReady(picturePath);
                                }
                            });
                        }
                    }
                }
            };
            observer.startWatching();
        }
    }


    public byte[] imgbyte;
    public String voiceglobal;




    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //Initiate CameraView
        cameraView = new CameraSurfaceView(this); //Calls CameraSurfaceView

        // Set the view
        this.setContentView(cameraView);



        //VOICE DETECTION HAPPENS HERE.
        ArrayList<String> voiceRes = getIntent().getExtras().getStringArrayList(RecognizerIntent.EXTRA_RESULTS);
        String Voicedata = voiceRes.toString();
        Log.d("Voicedata was ", Voicedata);
        voiceglobal = Voicedata;


        // "Dynamic" voice detection ...
        if((Voicedata.equals("[take a picture]")) || (Voicedata.equals("[find my cup]")) || (Voicedata.equals("[find my keys]")))
        {
            //Then take the picture.
             takePicture();

        } // if voicedata equals

        else if(!Voicedata.equals("take a picture"))
        {
            //Make a toast that says it's wrong.
            Toast.makeText(getApplicationContext(), "Try again", Toast.LENGTH_LONG).show();
        }

    }

    @Override
    protected void onResume() {
        super.onResume();

        // Do not hold the camera during onResume
        if (cameraView != null) {
            cameraView.releaseCamera();
        }


    }

    @Override
    protected void onPause() {
        super.onPause();

        // Do not hold the camera during onPause
        if (cameraView != null) {
            cameraView.releaseCamera();
        }
    }






}

非常感谢。我会 post 整个项目，一旦它可以供用户使用。

Answer 1

检查您的清单中是否具有 Internet 权限 <uses-permission android:name="android.permission.INTERNET" />
将所有网络代码移出主 UI 线程。否则，您将在日志中得到 android.os.NetworkOnMainThreadException。更多信息 here.

Android Studio 在拍照后通过套接字发送字符串 [Google Glass]

Android Studio Send string over socket after taking a picture [Google Glass]

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