These are notes for a presentation on building a GifCamera Glassware - http://goo.gl/vZrxSQ

AndroidManifest_1.xml

<activity
    android:name=".GGMainActivity"
    android:label="@string/app_name" >
	<intent-filter>
		<action android:name="android.intent.action.MAIN"/>
	  <category android:name="android.intent.category.LAUNCHER" />
  </intent-filter>
</activity>

AndroidManifest_2.xml

<application
		android:allowBackup="true"
		android:icon="@drawable/ic_launcher"
		android:label="@string/app_name"
		android:theme="@android:style/Theme.Holo.Light.NoActionBar.Fullscreen">
  <!-- ... -->
</application>

AndroidManifest_3.xml

<activity
		android:name=".GGMainActivity"
		android:icon="@drawable/ic_launcher"
		android:label="@string/app_name"
		android:immersive="true" >
	<intent-filter>
		<action android:name="android.intent.action.MAIN"/>
		<action android:name="com.google.android.glass.action.VOICE_TRIGGER" />
		<category android:name="android.intent.category.LAUNCHER" />
	</intent-filter>
	<meta-data
			android:name="com.google.android.glass.VoiceTrigger"
		  android:resource="@xml/voice_launch" />
</activity>

AndroidManifest_final.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.feigdev.gg_test" >
	<uses-permission android:name="android.permission.CAMERA"/>
	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
	<uses-feature android:name="android.hardware.camera"/>
	<uses-feature android:name="android.hardware.camera.autofocus"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
		android:theme="@android:style/Theme.Holo.Light.NoActionBar.Fullscreen">
        <activity
            android:name=".GGMainActivity"
            android:label="@string/app_name"
			android:immersive="true">
			<intent-filter>
				<action android:name="android.intent.action.MAIN"/>
				<action android:name="com.google.android.glass.action.VOICE_TRIGGER" />
				<category android:name="android.intent.category.LAUNCHER" />
			</intent-filter>
			<meta-data
					android:name="com.google.android.glass.VoiceTrigger"
					android:resource="@xml/voice_launch" />
		</activity>
    </application>

</manifest>

build_1.gradle

dependencies {
  // requires library project https://github.com/emil10001/ReusableAndroidUtils
  compile project(':ReusableAndroidUtils')
}

build_2.gradle

android {
  compileSdkVersion "Google Inc.:Glass Development Kit Sneak Peek:15"
  buildToolsVersion "19.0.1"
}

builder2.xml

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

<FrameLayout
		xmlns:android="http://schemas.android.com/apk/res/android"
		android:layout_width="match_parent"
		android:layout_height="match_parent"
		android:background="@android:color/black">

	<ImageView
			android:id="@+id/cur_img"
			android:layout_width="match_parent"
			android:layout_height="match_parent"/>

	<ProgressBar
			style="?android:attr/progressBarStyleLarge"
			android:layout_width="wrap_content"
			android:layout_height="wrap_content"
			android:id="@+id/progressBar"
			android:layout_gravity="center"/>

</FrameLayout>

fragment_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.feigdev.gg_runthrough.MainActivity$ImageGrabFrag">

	<SurfaceView
			android:id="@+id/preview1"
			android:layout_width="match_parent"
			android:layout_height="match_parent"
			android:layout_alignParentBottom="true"
			android:layout_alignParentLeft="true" />
</RelativeLayout>

GGMainActivity.java

public class GGMainActivity extends Activity implements GifFlowControl {
    private static final String TAG = "GGMainActivity";
    static ArrayList<String> listOfFiles = new ArrayList<String>();
    static String gifFile;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

    }

    @Override
    public void onResume() {
        super.onResume();
        getFragmentManager().beginTransaction()
                .replace(R.id.container, new ImageGrabFrag())
                .commit();
    }

    @Override
    public void startBuild() {
        getFragmentManager().beginTransaction()
                .replace(R.id.container, new GifBuilderFrag())
                .commit();
    }

    @Override
    public void startDisplay() {

    }
}

GGMainActivity_screenOn.java

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main2);

  getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
}

GifBuilderFrag.java

public class GifBuilderFrag extends Fragment {
    private static final String TAG = "GifBuilderFrag";
    private GifFlowControl flowControl;
    private ImageView curImg;
    private ProgressBar progressBar;
    private AsyncTask updater;

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        flowControl = (GifFlowControl) activity;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        Log.d(TAG, "onCreateView");
        View rootView = inflater.inflate(R.layout.builder, container, false);

        return rootView;
    }

    @Override
    public void onResume() {
        super.onResume();
        new BackgroundGif().execute();
    }

    private class BackgroundGif extends AsyncTask<Void, Bitmap, String> {

        @Override
        protected String doInBackground(Void... params) {
            Log.d(TAG, "GlassPhotoDelay");
            String gifFile = SimpleFileUtils.getDir() + File.separator + System.currentTimeMillis() + ".gif";

            // http://stackoverflow.com/a/20277649/974800
            ArrayList<Bitmap> bitmaps = new ArrayList<Bitmap>();
            for (String filename : MainActivity.listOfFiles) {
                File f = new File(filename);
                if (!f.exists())
                    continue;
                Bitmap b = ImageTools.generatePic(filename);
                bitmaps.add(b);
                publishProgress(b);
            }
            byte[] bytes = ImageTools.generateGIF(bitmaps);
            SimpleFileUtils.write(gifFile, bytes);
            String newGifFile = SimpleFileUtils.getSdDir() + File.separator
                    + "DCIM" + File.separator + "Camera" + File.separator
                    + System.currentTimeMillis() + ".gif";
            try {
                SimpleFileUtils.copy(gifFile, newGifFile);
            } catch (IOException e) {
                e.printStackTrace();
            }

            for (String filename : MainActivity.listOfFiles) {
                File f = new File(filename);
                if (f.exists())
                    f.delete();
            }

            return gifFile;
        }

        @Override
        protected void onPostExecute(String params) {
            flowControl.startDisplay();
        }
    }


}

GifBuilderFrag_eyeCandy.java

public class GifBuilderFrag extends Fragment {
    private static final String TAG = "GifBuilderFrag";
    private GifFlowControl flowControl;
    private ImageView curImg;
    private ProgressBar progressBar;
    private AsyncTask updater;

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        flowControl = (GifFlowControl) activity;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        Log.d(TAG, "onCreateView");
        View rootView = inflater.inflate(R.layout.builder2, container, false);

        curImg = (ImageView) rootView.findViewById(R.id.cur_img);
        progressBar = (ProgressBar) rootView.findViewById(R.id.progressBar);

        return rootView;
    }

    @Override
    public void onResume() {
        super.onResume();
        new BackgroundGif().execute();
        updater = new ProgressUpdater().execute();
    }

    @Override
    public void onPause() {
        updater.cancel(true);
        super.onPause();
    }


    private class ProgressUpdater extends AsyncTask<Void, Integer, Void> {
        @Override
        protected Void doInBackground(Void... params) {
            int count = 0;
            try {
                while (true) {
                    publishProgress((count++ % 100));
                    Thread.sleep(50);
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return null;
        }

        protected void onProgressUpdate(Integer... progress) {
            progressBar.setProgress(progress[0]);
        }

    }

    private class BackgroundGif extends AsyncTask<Void, Bitmap, String> {

        @Override
        protected String doInBackground(Void... params) {
            Log.d(TAG, "GlassPhotoDelay");
            String gifFile = SimpleFileUtils.getDir() + File.separator + System.currentTimeMillis() + ".gif";

            ArrayList<Bitmap> bitmaps = new ArrayList<Bitmap>();
            for (String filename : GGMainActivity.listOfFiles) {
                File f = new File(filename);
                if (!f.exists())
                    continue;
                Bitmap b = ImageTools.generatePic(filename);
                bitmaps.add(b);
                publishProgress(b);
            }
            byte[] bytes = ImageTools.generateGIF(bitmaps);
            SimpleFileUtils.write(gifFile, bytes);
            String newGifFile = SimpleFileUtils.getSdDir() + File.separator
                    + "DCIM" + File.separator + "Camera" + File.separator
                    + System.currentTimeMillis() + ".gif";
            try {
                SimpleFileUtils.copy(gifFile, newGifFile);
            } catch (IOException e) {
                e.printStackTrace();
            }

            for (String filename : GGMainActivity.listOfFiles) {
                File f = new File(filename);
                if (f.exists())
                    f.delete();
            }

            return gifFile;
        }

        protected void onProgressUpdate(Bitmap... progress) {
            curImg.setImageBitmap(progress[0]);
        }

        @Override
        protected void onPostExecute(String params) {
            Log.d(TAG, "creating card with params: " + params);
            flowControl.startDisplay();
        }
    }


}

GifDisplayFrag_1.java

public class GifDisplayFrag extends Fragment {
    private static final String TAG = "GifDisplayFrag";

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = new GifWebView(getActivity(), GGMainActivity.gifFile, "480", "360");
        return v;
    }

}

GifDisplayFrag_final.java

public class GifDisplayFrag extends Fragment {
    private static final String TAG = "GifDisplayFrag";
    public static final String GOOGLE_DRIVE = "com.google.android.apps.docs";
    public static final String GOOGLE_PLUS = "com.google.android.apps.plus";

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = new GifWebView(getActivity(), GGMainActivity.gifFile, "480", "360");
        new DriveUpload().execute();
        return v;
    }

    private class DriveUpload extends AsyncTask<Void, Void, Void> {
        @Override
        protected Void doInBackground(Void... params) {
            Log.d(TAG, "GlassPhotoDelay");
            try {
                Thread.sleep(5000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void params) {
            try {
                // http://divingintoglass.blogspot.com/2014/01/how-to-upload-files-using-google-drive.html
                Uri imageUri = Uri.fromFile(new File(GGMainActivity.gifFile));
                Intent shareIntent = ShareCompat.IntentBuilder.from(getActivity())
                        .setText("#glassgif #throughglass")
                        .setType("image/gif")
                        .setStream(imageUri )
                        .getIntent()
                        .setPackage(GOOGLE_DRIVE);

                startActivity(shareIntent);

                getActivity().finish();
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }

    }
}

GifFlowControl.java

package com.feigdev.gg_test;

public interface GifFlowControl {
  public void startBuild();
  public void startDisplay();
}

ImageGrabFrag_1.java

package com.feigdev.gg_test;

import android.app.Activity;
import android.app.Fragment;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.view.*;
// requires library project https://github.com/emil10001/ReusableAndroidUtils
import com.feigdev.reusableandroidutils.graphics.PhotoCallback;
import com.feigdev.reusableandroidutils.graphics.PhotoHandler;
import com.google.android.glass.sample.camera.CameraPreview;

import java.io.IOException;

/**
 * Created by ejf3 on 3/11/14.
 */
public class ImageGrabFrag extends Fragment implements PhotoCallback {
    private static final String TAG = "ImageGrabFrag";
    private Camera camera;
    private CameraPreview cameraPreview;
    private SurfaceView preview;
    private SurfaceHolder holder;
    private static boolean isAlive = false;

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main2, container, false);

        preview = (SurfaceView) rootView.findViewById(R.id.preview1);
        preview.getHolder().addCallback(mSurfaceHolderCallback);

        return rootView;
    }

    @Override
    public void onResume() {
        Log.d(TAG, "onResume");
        super.onResume();
        isAlive = true;
    }

    @Override
    public void onPause() {
        Log.d(TAG, "onPause");
        isAlive = false;

        if (camera != null) {
            camera.stopPreview();
            camera.release();
            camera = null;
        }
        super.onPause();
    }

    private void initCamera() {
        Log.d(TAG, "initCamera");

        // do we have a camera?
        if (!getActivity().getPackageManager()
                .hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
            Log.d(TAG, "No camera on this device");
            return;
        }

        camera = Camera.open();

        cameraPreview = new CameraPreview(getActivity());
        cameraPreview.setCamera(camera);
        try {
            camera.setPreviewDisplay(holder);
        } catch (IOException e) {
            e.printStackTrace();
        }
        camera.startPreview();

    }

    private void takePicture() {
        Log.d(TAG, "takePicture");

        if (!isAlive)
            return;

        camera.takePicture(null, null,
                new PhotoHandler(this));
    }

    @Override
    public void pictureTaken(String filename){
        Log.d(TAG, "captured file " + filename);
        getActivity().finish();
    }

    private final SurfaceHolder.Callback mSurfaceHolderCallback = new SurfaceHolder.Callback() {

        @Override
        public void surfaceCreated(SurfaceHolder hldr) {
            holder = hldr;
            initCamera();
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            // Nothing to do here.
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
            // Nothing to do here.
        }
    };


}

ImageGrabFrag_changes_1.java

public void onResume() {
  Log.d(TAG, "onResume");
  super.onResume();
  isAlive = true;

  new GlassPhotoDelay().execute();
}

private void initCamera() {
  Log.d(TAG, "initCamera");

  // do we have a camera?
  if (!getActivity().getPackageManager()
      .hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
    Log.d(TAG, "No camera on this device");
    return;
  }

  camera = Camera.open();
  camera.setDisplayOrientation(0);

  /**
   * The camera preview on Glass needs certain special parameters to run properly
   * SO help: http://stackoverflow.com/a/19257078/974800
   */
  Camera.Parameters params = camera.getParameters();
  params.setPreviewFpsRange(30000, 30000);
  params.setJpegQuality(90);
  // hard-coding is bad, but I'm a bit lazy
  params.setPictureSize(640, 480);
  params.setPreviewSize(640, 480);
  camera.setParameters(params);

  cameraPreview = new CameraPreview(getActivity());
  cameraPreview.setCamera(camera);
  try {
    camera.setPreviewDisplay(holder);
  } catch (IOException e) {
    e.printStackTrace();
  }
  camera.startPreview();
  // note we removed the call to takePicture()
}

/**
 * There is currently a race condition where using a voice command to launch,
 * then trying to grab the camera will fail, because the microphone is still locked
 * <p/>
 * http://stackoverflow.com/a/20154537/974800
 * https://code.google.com/p/google-glass-api/issues/detail?id=259
 */
private class GlassPhotoDelay extends AsyncTask<Void, Void, Void> {

  @Override
  protected Void doInBackground(Void... params) {
    Log.d(TAG, "GlassPhotoDelay");
    try {
      Thread.sleep(1000);
    } catch (InterruptedException e) {
      e.printStackTrace();
    }
    return null;
  }

  @Override
  protected void onPostExecute(Void params) {
    if (!isAlive)
      return;

    initCamera();
    takePicture();
  }
}

private final SurfaceHolder.Callback mSurfaceHolderCallback = new SurfaceHolder.Callback() {

  @Override
  public void surfaceCreated(SurfaceHolder hldr) {
    holder = hldr;
    // removed initCamera call
  }

  @Override
  public void surfaceDestroyed(SurfaceHolder holder) {
    // Nothing to do here.
  }

  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    // Nothing to do here.
  }
};

ImageGrabFrag_final.java

package com.feigdev.gg_test;

import android.app.Activity;
import android.app.Fragment;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.*;
import com.feigdev.reusableandroidutils.graphics.PhotoCallback;
import com.feigdev.reusableandroidutils.graphics.PhotoHandler;
import com.google.android.glass.sample.camera.CameraPreview;

import java.io.IOException;

/**
 * Created by ejf3 on 3/11/14.
 */
public class ImageGrabFrag extends Fragment implements PhotoCallback {
    private static final String TAG = "ImageGrabFrag";
    private Camera camera;
    private CameraPreview cameraPreview;
    private SurfaceView preview;
    private SurfaceHolder holder;
    private int count = 0;
    private static boolean isAlive = false;
    private GifFlowControl flowControl;

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        flowControl = (GifFlowControl)activity;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main2, container, false);

        preview = (SurfaceView) rootView.findViewById(R.id.preview1);
        preview.getHolder().addCallback(mSurfaceHolderCallback);

        return rootView;
    }

    @Override
    public void onResume() {
        Log.d(TAG, "onResume");
        super.onResume();
        isAlive = true;
        count = 0;

        new GlassPhotoDelay().execute();
    }

    @Override
    public void onPause() {
        Log.d(TAG, "onPause");
        isAlive = false;

        if (camera != null) {
            camera.stopPreview();
            camera.release();
            camera = null;
        }
        super.onPause();
    }

    private void initCamera() {
        Log.d(TAG, "initCamera");

        // do we have a camera?
        if (!getActivity().getPackageManager()
                .hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
            Log.d(TAG, "No camera on this device");
            return;
        }

        camera = Camera.open();
        camera.setDisplayOrientation(0);

        /**
         * The camera preview on Glass needs certain special parameters to run properly
         * SO help: http://stackoverflow.com/a/19257078/974800
         */
        Camera.Parameters params = camera.getParameters();
        params.setPreviewFpsRange(30000, 30000);
        params.setJpegQuality(90);
        // hard-coding is bad, but I'm a bit lazy
        params.setPictureSize(640, 480);
        params.setPreviewSize(640, 480);
        camera.setParameters(params);

        cameraPreview = new CameraPreview(getActivity());
        cameraPreview.setCamera(camera);
        try {
            camera.setPreviewDisplay(holder);
        } catch (IOException e) {
            e.printStackTrace();
        }
        camera.startPreview();
    }

    private void takePicture() {
        Log.d(TAG, "takePicture");
        count++;

        if (!isAlive)
            return;

        camera.takePicture(null, null,
                new PhotoHandler(this));
    }

    @Override
    public void pictureTaken(String filename){
        GGMainActivity.listOfFiles.add(filename);
        if (count >= 5){
            Log.d(TAG, "taken 5");
            flowControl.startBuild();
            return;
        }
        if (!isAlive)
            return;

        camera.startPreview();
        takePicture();
    }

    /**
     * There is currently a race condition where using a voice command to launch,
     * then trying to grab the camera will fail, because the microphone is still locked
     * <p/>
     * http://stackoverflow.com/a/20154537/974800
     * https://code.google.com/p/google-glass-api/issues/detail?id=259
     */
    private class GlassPhotoDelay extends AsyncTask<Void, Void, Void> {

        @Override
        protected Void doInBackground(Void... params) {
            Log.d(TAG, "GlassPhotoDelay");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void params) {
            if (!isAlive)
                return;

            initCamera();
            takePicture();
        }
    }
    private final SurfaceHolder.Callback mSurfaceHolderCallback = new SurfaceHolder.Callback() {

        @Override
        public void surfaceCreated(SurfaceHolder hldr) {
            holder = hldr;
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            // Nothing to do here.
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
            // Nothing to do here.
        }
    };


}

initCamera.java

private void initCamera() {
  Log.d(TAG, "initCamera");

  // do we have a camera?
  if (!getActivity().getPackageManager()
      .hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
    Log.d(TAG, "No camera on this device");
    return;
  }

  camera = Camera.open();
  camera.setDisplayOrientation(0);

  /**
   * The camera preview on Glass needs certain special parameters to run properly
   * SO help: http://stackoverflow.com/a/19257078/974800
   */
  Camera.Parameters params = camera.getParameters();
  params.setPreviewFpsRange(30000, 30000);
  params.setJpegQuality(90);
  // hard-coding is bad, but I'm a bit lazy
  params.setPictureSize(640, 480);
  params.setPreviewSize(640, 480);
  camera.setParameters(params);

  cameraPreview = new CameraPreview(getActivity());
  cameraPreview.setCamera(camera);
  try {
    camera.setPreviewDisplay(holder);
  } catch (IOException e) {
    e.printStackTrace();
  }
  camera.startPreview();
  takePicture();
}

insertStaticCard.java

// in BackgroundGif subclass
protected void onPostExecute(String params) {
  Log.d(TAG, "creating card with params: " + params);
  if (PlatformUtils.isGlass()) {
    if (null == params)
      return;

    // http://stackoverflow.com/a/21843601/974800
    Uri imgUri = Uri.fromFile(new File(params));

    GGMainActivity.gifFile = params;

    // create card
    Card gifCard = new Card(getActivity());
    if (null != imgUri) {
      gifCard.addImage(imgUri);
      gifCard.setImageLayout(Card.ImageLayout.FULL);
      gifCard.setText(MainActivity.gifFile);
    } else
      gifCard.setText("failed to get image uri");

    // menus currently not supported
    // https://code.google.com/p/google-glass-api/issues/detail?id=320

    TimelineManager tlm = TimelineManager.from(getActivity());
    tlm.insert(gifCard);
    Log.d(TAG, "inserted into timeline!");
  }

  flowControl.startDisplay();
}

listOfFiles.java

static ArrayList<String> listOfFiles = new ArrayList<String>();

onAttach.java

private GifFlowControl flowControl;

@Override
public void onAttach(Activity activity) {
  super.onAttach(activity);
  flowControl = (GifFlowControl)activity;
}

pictureTaken_startBuild.java

@Override
public void pictureTaken(String filename){
  GGMainActivity.listOfFiles.add(filename);
  if (count >= 5){
    Log.d(TAG, "taken 5");
    // use the interface to do a fragment transaction in the activity
    flowControl.startBuild();
    return;
  }
  if (!isAlive)
    return;

  camera.startPreview();
  takePicture();
}

pictureTaken_updated.java

private static int count = 0;
//...

@Override
public void onResume() {
  count = 0;
  //...
}

private void takePicture() {
  Log.d(TAG, "takePicture");
  count++;

  if (!isAlive)
    return;

  camera.takePicture(null, null,
      new PhotoHandler(this));
}

@Override
public void pictureTaken(String filename){
  GGMainActivity.listOfFiles.add(filename);
  if (count >= 5){
    count = 0;
    Log.d(TAG, "taken 5");
    getActivity().finish();
    return;
  }
  if (!isAlive)
    return;

  camera.startPreview();
  takePicture();
}

startDisplay.java

@Override
public void startDisplay() {
  // https://www.grokkingandroid.com/adding-files-to-androids-media-library-using-the-mediascanner/
  try {
    Intent intent =
        new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
    intent.setData(Uri.fromFile(new File(gifFile)));
    sendBroadcast(intent);
  } catch (Exception e) {
    e.printStackTrace();
  }

  getFragmentManager().beginTransaction()
      .replace(R.id.container, new GifDisplayFrag())
      .commit();
}

strings_1.xml

<string name="voice_launch">launch the app</string>

voice_launch.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- res/xml/voice_launch.xml -->
<trigger keyword="@string/voice_launch">
</trigger>