Android Open Source - OrzEye Camera Activity

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From Project

Back to project page OrzEye.

License

The source code is released under:

GNU General Public License

Java Source Code

package com.dylan.orzeye;
//  w w w.  ja  v a  2s.  c o m
import java.io.IOException;
import java.lang.ref.WeakReference;
import java.util.Locale;

import com.dylan.orzeye.dictionary.DictionaryTool;
import com.dylan.orzeye.dictionary.YoudaoJsonParser;
import com.dylan.orzeye.dictionary.YoudaoTranslater;
import com.dylan.orzeye.image.ImageProcessTool;
import com.dylan.orzeye.ocr.OCRTool;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.ImageFormat;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.PreviewCallback;
import android.util.DisplayMetrics;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.ImageButton;
import android.widget.PopupMenu;
import android.widget.PopupMenu.OnMenuItemClickListener;
import android.widget.TextView;
import android.widget.Toast;

public class CameraActivity extends Activity implements SurfaceHolder.Callback,
    PreviewCallback {
  private boolean isPreview = false;
  private SurfaceView mPreviewSV = null;
  private SurfaceHolder mSurfaceHolder = null;
  private Camera mCamera = null;
  private static TextView recognizedView = null;
  private static TextView translatedView = null;
  private ImageButton triggerButton = null;
  private ImageButton dicWebSearchButton = null;
  private ImageButton addNotesButton = null;
  private ImageButton overflowMenu_Button = null;
  private DisplayMetrics dm = null;

  private final static String[] recognizedText = { new String("") };
  
  private OCRTool mOCRTool;
  private DictionaryTool mDictionaryTool;
  

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_camera);

    mPreviewSV = (SurfaceView) findViewById(R.id.surfaceView);
    mPreviewSV.setZOrderOnTop(false);
    mSurfaceHolder = mPreviewSV.getHolder();
    mSurfaceHolder.setFormat(PixelFormat.TRANSPARENT);
    mSurfaceHolder.addCallback(this);

    triggerButton = (ImageButton) findViewById(R.id.TriggerButton);
    triggerButton.setOnClickListener(new TriggerButtonOnClickListener());

    dicWebSearchButton = (ImageButton) findViewById(R.id.web_search_btn);

    addNotesButton = (ImageButton) findViewById(R.id.notes_add_btn);

    recognizedView = (TextView) findViewById(R.id.RecognizedView);
    translatedView = (TextView) findViewById(R.id.TranslatedView);
    
    overflowMenu_Button = (ImageButton) findViewById(R.id.Overflow_Menu);
    overflowMenu_Button.setOnClickListener(new OnClickListener() {
      
      @Override
      public void onClick(View v) {
        PopupMenu overflowMneu = new PopupMenu(getBaseContext(), v);
        MenuInflater inflater = overflowMneu.getMenuInflater();
        inflater.inflate(R.menu.overflow_menu, overflowMneu.getMenu());

        overflowMneu.show();
        
      }
    });
    
    dm = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(dm);

    mOCRTool = new OCRTool();
    mDictionaryTool = new DictionaryTool();
  }

  public void surfaceChanged(SurfaceHolder holder, int format, int width,
      int height) {
    initCamera();
  }

  public void surfaceCreated(SurfaceHolder holder) {
    mCamera = Camera.open();
    try {
      mCamera.setPreviewDisplay(mSurfaceHolder);
    } catch (IOException e) {
      if (null != mCamera) {
        mCamera.release();
        mCamera = null;
      }
      e.printStackTrace();
    }
  }

  public void surfaceDestroyed(SurfaceHolder holder) {
    if (null != mCamera) {
      mCamera.setOneShotPreviewCallback(null);

      mCamera.stopPreview();
      isPreview = false;
      mCamera.release();
      mCamera = null;
    }
  }

  private void initCamera() {
    if (isPreview) {
      mCamera.stopPreview();
    }
    if (null != mCamera) {
      Camera.Parameters mCameraParam = mCamera.getParameters();
      mCameraParam.setPictureFormat(ImageFormat.JPEG);
      mCameraParam.setPreviewSize(mCameraParam.getSupportedPreviewSizes()
          .get(1).width,
          mCameraParam.getSupportedPreviewSizes().get(1).height);
      mCamera.setDisplayOrientation(90);
      mCameraParam
          .setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
      mCamera.setParameters(mCameraParam);
      mCamera.startPreview();
      isPreview = true;
    }
  }

  public DisplayMetrics getDisplayMetrics() {
    return dm;
  }

  @Override
  public void onPreviewFrame(final byte[] data, final Camera camera) {
    if (null != data) {
      enableTriggerButton(false);

      ProgressDialog dialog = showProgressDialog(getString(R.string.ocrprogressdlg_title),
          getString(R.string.waiting_msg));
      final UpdateUIHandler handler = new UpdateUIHandler(dialog, CameraActivity.this);
      
      Thread thread = new Thread(new Runnable() {

        @Override
        public void run() {
          String translatedText;
          Bitmap ocrBitmap = ImageProcessTool.getOCRBitmapFromCamera(
              data, camera, dm);
          if (mOCRTool.isOCREngineReasy()
              && mDictionaryTool.isDictionaryReady()) {
            recognizedText[0] = mOCRTool.OCRStart(ocrBitmap);
            translatedText = mDictionaryTool
                .lookUpDictionary(recognizedText[0]
                    .toLowerCase(Locale.getDefault()));
          } else {
            translatedText = getString(R.string.datanotfound_Msg);
          }
          Message msg = new Message();
          Bundle bundle = new Bundle();
          bundle.putString("translated", translatedText);
          msg.setData(bundle);
          handler.sendMessage(msg);
        }
      });
      thread.start();

      enableTriggerButton(true);

    }
  }

  private void enableTriggerButton(boolean enable) {
    triggerButton
        .setOnClickListener(enable ? new TriggerButtonOnClickListener()
            : null);
    triggerButton.setEnabled(enable);
  }

  long waitTime = 2000;
  long touchTime = 0;

  @Override
  public void onBackPressed() {
    long currentTime = System.currentTimeMillis();
    if ((currentTime - touchTime) >= waitTime) {
      Toast.makeText(this, getString(R.string.presstoquit_msg), Toast.LENGTH_SHORT)
          .show();
      touchTime = currentTime;
    } else {
      finish();
    }
  }

  private ProgressDialog showProgressDialog(String title, String msg) {
    final ProgressDialog dialog = new ProgressDialog(this);
    dialog.setTitle(title);
    dialog.setMessage(msg);
    dialog.show();
    
    return dialog;
  }

  
  static class UpdateUIHandler extends Handler {
    private ProgressDialog dialog;
    WeakReference<CameraActivity> mActivity;
    
    UpdateUIHandler(ProgressDialog dialog, CameraActivity activity) {
      this.dialog = dialog;
      mActivity = new WeakReference<CameraActivity>(activity);
    }
    public void handleMessage(android.os.Message msg) {
      if(dialog != null) {
        dialog.cancel();
      }
      if(msg.what != 1 && recognizedView !=null && translatedView !=null) {
        recognizedView.setText(recognizedText[0]);
        translatedView.setText(msg.getData().getString("translated"));
      }
      
    }
  
  }
  
  class TriggerButtonOnClickListener implements OnClickListener {

    @Override
    public void onClick(View v) {
      if (null != mCamera && isPreview) {
        mCamera.setOneShotPreviewCallback(CameraActivity.this);
      }
    }
  }
}

Java Source Code List

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