CaptureActivity.java

package com.barcode;

import java.io.IOException;
import java.util.Vector;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.res.AssetFileDescriptor;
import android.graphics.Bitmap;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.os.Handler;
import android.os.Vibrator;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;

import com.codecomb.ufreedom.R;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;

public class CaptureActivity extends Activity implements Callback {

	private static final String TAG = "CaptureActivity";
	private CaptureActivityHandler handler;
	private ViewfinderView viewfinderView;
	private boolean hasSurface;
	private Vector<BarcodeFormat> decodeFormats; 
	private String characterSet;
	//private TextView txtResult;
	private InactivityTimer inactivityTimer;
	private MediaPlayer mediaPlayer;
	private boolean playBeep;
	private static final float BEEP_VOLUME = 0.10f;
	private boolean vibrate;
//	private EditText etCode;
//	private Button btnOk;
	private Context _context;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.layout_scan);
		
		Log.e(TAG, "onCreate");
		//閿熸枻鎷峰閿熸枻鎷� CameraManager
		CameraManager.init(getApplication());
		_context = this;

		viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
		//txtResult = (TextView) findViewById(R.id.txtResult);
		hasSurface = false;
		inactivityTimer = new InactivityTimer(this);
		
//		etCode = (EditText)findViewById(R.id.etCode);
//		btnOk = (Button)findViewById(R.id.btnOk);
//		btnOk.setOnClickListener(new OnClickListener() {
//			
//			@Override
//			public void onClick(View v) {
//				// TODO Auto-generated method stub
//				String code = etCode.getText().toString();
//				if (!code.equals(""))
//				{
//					Intent intent=getIntent();
//					intent.putExtra("RESULT", code);
//					setResult(RESULT_OK, intent);
//					finish();
//				}
//				else
//				{
//					Toast.makeText(_context, "閿熸枻鎷烽敓鏂ゆ嫹閿熸枻鎷烽敓鏂ゆ嫹閿燂拷.", Toast.LENGTH_SHORT).show();
//				}
//				
//			}
//		});
	}

	@Override
	protected void onResume() {
		super.onResume();
		Log.e(TAG, "onResume");
		SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
		SurfaceHolder surfaceHolder = surfaceView.getHolder();
	
		
		if (hasSurface) {
			initCamera(surfaceHolder);
		} else {
			surfaceHolder.addCallback(this);
			surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		}
		decodeFormats = null;
		characterSet = null;

		playBeep = true;
		AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);
		if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
			playBeep = false;
		}
		initBeepSound();
		vibrate = true;
	}

	@Override
	protected void onPause() {
		super.onPause();
		if (handler != null) {
			handler.quitSynchronously();
			handler = null;
		}
		CameraManager.get().closeDriver();
	}

	@Override
	protected void onDestroy() {
		Log.e(TAG, "Destory");
		inactivityTimer.shutdown();
		super.onDestroy();
	}

	private void initCamera(SurfaceHolder surfaceHolder) {
		try {
			CameraManager.get().openDriver(surfaceHolder);
			

		} catch (IOException ioe) {
			return;
		} catch (RuntimeException e) {
			return;
		}
		if (handler == null) {
			handler = new CaptureActivityHandler(this, decodeFormats,
					characterSet);
		}
	}

	@Override
	public void surfaceChanged(SurfaceHolder holder, int format, int width,
			int height) {

	}

	@Override
	public void surfaceCreated(SurfaceHolder holder) {
		if (!hasSurface) {
			hasSurface = true;
			initCamera(holder);
		}
		
	}

	@Override
	public void surfaceDestroyed(SurfaceHolder holder) {
		hasSurface = false;

	}

	public ViewfinderView getViewfinderView() {
		return viewfinderView;
	}

	public Handler getHandler() {
		return handler;
	}

	public void drawViewfinder() {
		viewfinderView.drawViewfinder();

	}

	public void handleDecode(Result obj, Bitmap barcode) {

		inactivityTimer.onActivity();
		viewfinderView.drawResultBitmap(barcode);
		 playBeepSoundAndVibrate();
		/*txtResult.setText(obj.getBarcodeFormat().toString() + ":"
				+ obj.getText());*/
		Intent intent=getIntent();
		intent.putExtra("RESULT",obj.getText().toString());
		setResult(RESULT_OK, intent);
		finish();
	}
	
	private void initBeepSound() {
		if (playBeep && mediaPlayer == null) {
			// The volume on STREAM_SYSTEM is not adjustable, and users found it
			// too loud,
			// so we now play on the music stream.
			setVolumeControlStream(AudioManager.STREAM_MUSIC);
			mediaPlayer = new MediaPlayer();
			mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
			mediaPlayer.setOnCompletionListener(beepListener);

			AssetFileDescriptor file = getResources().openRawResourceFd(
					R.raw.beep);
			try {
				mediaPlayer.setDataSource(file.getFileDescriptor(),
						file.getStartOffset(), file.getLength());
				file.close();
				mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
				mediaPlayer.prepare();
			} catch (IOException e) {
				mediaPlayer = null;
			}
		}
	}

	private static final long VIBRATE_DURATION = 200L;

	private void playBeepSoundAndVibrate() {
		if (playBeep && mediaPlayer != null) {
			mediaPlayer.start();
		}
		if (vibrate) {
			Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
			vibrator.vibrate(VIBRATE_DURATION);
		}
	}

	/**
	 * When the beep has finished playing, rewind to queue up another one.
	 */
	private final OnCompletionListener beepListener = new OnCompletionListener() {
		public void onCompletion(MediaPlayer mediaPlayer) {
			mediaPlayer.seekTo(0);
		}
	};

}