相机Camera

public class Main extends Activity implements SurfaceHolder.Callback,
		OnClickListener, PictureCallback {
	private Camera camera;// 相机
	private boolean isboolean = true;
	public static final int ITEM0 = Menu.FIRST;
	public static final int ITEM1 = Menu.FIRST + 1;
	public static final int ITEM2 = Menu.FIRST + 2;
	byte[] data;
	SurfaceView surfaceView;
	ImageButton take_btn;// 拍照
	ImageButton tool_btn;// 工具

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		getWindow().setFormat(PixelFormat.TRANSLUCENT);//
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
				WindowManager.LayoutParams.FLAG_FULLSCREEN);
		setContentView(R.layout.main);
		getView();// 实例化
		surfaceView.getHolder().setFixedSize(320, 240); // 设置分辨率
		surfaceView.getHolder()
				.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		surfaceView.getHolder().addCallback(this);// 回调
	}

	public void getView() {
		surfaceView = (SurfaceView) findViewById(R.id.surface_camera);
		take_btn = (ImageButton) findViewById(R.id.shutter);
		tool_btn = (ImageButton) findViewById(R.id.finish);
		take_btn.setOnClickListener(this);
		tool_btn.setOnClickListener(this);
	}

	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.shutter:// 拍照
			camera.takePicture(null, null, this);
			break;
		case R.id.finish:// 工具
			Main.super.openOptionsMenu();// 打开菜单
			break;
		default:
			break;
		}
	}

	public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
		// 在界面尺寸改变时被调用，设置相机的参数（大小，格式）
		if (isboolean) {
			camera.stopPreview();
		}
		// 相机参数设置
		Camera.Parameters para = camera.getParameters();
		para.setPictureFormat(PixelFormat.JPEG);
		para.setPreviewSize(w, h);
		para.setPictureSize(640, 480);// 照片大小
		para.set("rotation", 90);
		camera.setParameters(para);
		try {
			camera.setPreviewDisplay(holder);
		} catch (IOException e) {
			e.printStackTrace();
		}
		camera.startPreview();
		isboolean = true;
	}

	public void surfaceCreated(SurfaceHolder holder) {
		// 界面创建时被调用，一般是用来，打开相机，设置预览
		camera = Camera.open();// 不能放在构造函数里，否则产生不了预览效果
	}

	public void surfaceDestroyed(SurfaceHolder holder) {
		camera.stopPreview();
		isboolean = false;
		camera.release();
	}

	private Dialog buildDialog(Context context) {
		AlertDialog.Builder builder = new AlertDialog.Builder(context);
		builder.setTitle("是否储存照片");
		builder.setPositiveButton("存储", new DialogInterface.OnClickListener() {
			public void onClick(DialogInterface arg0, int arg1) {
				savepicture(data);
			}
		});
		builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
			public void onClick(DialogInterface dialog, int which) {
				camera.startPreview();
			}
		});
		return builder.create();
	};

	public Dialog onCreateDialog(int i) {
		switch (i) {
		case 1:
			return buildDialog(Main.this);
		}
		return null;
	};

	@SuppressWarnings("static-access")
	public void savepicture(byte[] _data) {
		String string = null;

		// 获取系统时间，并格式化
		Calendar calendar = Calendar.getInstance();
		calendar.setTime(new Date());
		int year = calendar.get(Calendar.YEAR);
		int mounth = calendar.get(Calendar.MONTH) + 1;
		int day = calendar.get(Calendar.DATE);
		int hour = calendar.get(calendar.HOUR);
		int min = calendar.get(calendar.MINUTE);
		int secound = calendar.get(calendar.SECOND);
		// 格式一：2011-11-1 12-12-66 作为文件名
		String formateDate1 = String.valueOf(year) + "-"
				+ String.valueOf(mounth) + "-" + String.valueOf(day) + "  "
				+ String.valueOf(hour) + "-" + String.valueOf(min) + "-"
				+ String.valueOf(secound);
		// 格式二：2011年11月1日 12时12分45秒 写在照片上
		String formateDate2 = String.valueOf(year) + "年"
				+ String.valueOf(mounth) + "月" + String.valueOf(day) + "日  "
				+ String.valueOf(hour) + "时" + String.valueOf(min) + "分"
				+ String.valueOf(secound) + "秒";

		// SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HHmmss");
		// String date = sdf.format(new Date());

		try {
			Bitmap bitmap = BitmapFactory.decodeByteArray(_data, 0,
					_data.length);
			Bitmap newbitmap = dateBitmap(bitmap, formateDate2);

			String photoName = formateDate1 + ".jpg";// 照片名称
			string = photoName;

			File file = new File(Utils.getSDPath(), photoName);// 创建图片文件

			FileOutputStream outStream = new FileOutputStream(file);
			newbitmap.compress(CompressFormat.JPEG, 100, outStream);
			outStream.close();
			camera.stopPreview();
			camera.startPreview();// 开始预览
		} catch (Exception e) {
		}
		Toast.makeText(Main.this, "照片存储路径：" + Utils.getSDPath() + "/" + string,
				2000).show();
	}

	// 往照片上写入日期
	private Bitmap dateBitmap(Bitmap bitmap, String date) {
		if (bitmap == null) {
			return null;
		}

		int w = bitmap.getWidth();
		int h = bitmap.getHeight();
		// 创建一个空白的bitmap
		Bitmap newbitmap = Bitmap.createBitmap(w, h, Config.ARGB_8888);// 创建一个新的和SRC长度宽度一样的位图
		Canvas canvas = new Canvas(newbitmap);
		canvas.drawBitmap(bitmap, 0, 0, null);// 在 0，0坐标开始画入src

		Paint paint = new Paint();
		paint.setStyle(Paint.Style.FILL);
		paint.setColor(Color.RED);

		paint.setTextSize(25);
		// canvas.drawText(date, 80, 50, paint);//居顶
		canvas.drawText(date, 80, 620, paint);// 居底
		canvas.save(Canvas.ALL_SAVE_FLAG);// 保存
		canvas.restore();// 存储
		return newbitmap;
	}

	public void onPictureTaken(byte[] _data, Camera camera) {
		data = _data;
		showDialog(1);// 弹出对话框，提示是否要保存图片
	}

	// Menu菜单
	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		menu.add(0, ITEM0, 0, "相册");
		menu.add(0, ITEM2, 2, "退出");
		menu.findItem(ITEM1);
		return true;
	}

	// Menu菜单点击事件
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case ITEM0:// 相册
			Intent intent = new Intent(Main.this, Album.class);
			startActivity(intent);
			break;
		case ITEM2:// 退出
			finish();
			break;
		}
		return super.onOptionsItemSelected(item);
	}

}