Android Studio Google Glass：如何使用语音命令拍照

Question

理想情况下，我尝试使用 voice_trigger.xml 中用户的语音输入并将其存储在 strings.xml 中，以便我可以比较相机 activity 中的字符串变量，例如如果匹配，请拍照并保存。

我不太确定如何实现它。听起来我有解决这个问题的正确想法吗？

以下：voice_trigger.xml、strings.xml、CameraActivity.java

voice_trigger.xml:

    <?xml version="1.0" encoding="utf-8"?>

<!-- For more information about voice trigger, check out: https://developers.google.com/glass/develop/gdk/starting-glassware -->
<trigger keyword="Visual tracker">
<!--    <input prompt="@string/glass_tracking_prompt" /> -->
        <input interaction ="@string/take_picture"/>
    <constraints network="true"
        camera="true" />
    </trigger>

strings.xml:

<resources>
    <string name="app_name">GlassTracker</string>
    <string name="title_activity_live_card_service">Tracking Prime LiveCard</string>
    <string name="title_activity_live_card_renderer">Tracking Prime Activity</string>
    <string name="action_stop">Close App</string>
    <string name="action_tune_track">Tune Tracker</string>
    <string name="action_start_track">Start Tracking</string>
    <string name="action_stop_track">Stop Tracking</string>
    <string name="hello_world">Hello visual tracker!</string>
    <string name="glass_tracking_trigger">Visual tracker</string>
    <string name="glass_tracking_prompt">Tap to tune</string>
    <string name="take_picture">Take a picture</string>
</resources>

CameraActivity.java:

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 com.google.android.glass.content.Intents;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by
 */
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
    /*Take out ints */
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        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);
            // TODO: Show the thumbnail to the user while the full picture is being
            // processed.
        }

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


    private void processPictureWhenReady(final String picturePath) {
        final File pictureFile = new File(picturePath);

        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();
        }
    }




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

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

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


    }

    @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！

Answer 1

在voice_triggers.xml文件中，将收听语音命令。当您对设备说出命令时，voiceRes 将填充您所说的内容，因为它是一个字符串类型的数组，理想情况下需要将其转换为字符串。然后根据用户说的做对比就简单了。另外，确保在比较前后包含方括号，否则 if 语句将不起作用。这是我很快发现的解决方案，我相信有很多方法可以做到。

在 onCreate() 方法中，在 this.setContentView(cameraView);

之后

ArrayList<String> voiceRes =getIntent().getExtras().getStringArrayList(RecognizerIntent.EXTRA_RESULTS);
String Voicedata = voiceRes.toString();


 if(Voicedata.equals("[take a picture]")
   {
        takepicture();

   }