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   源码介绍

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package com.example.watercamera;

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

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.os.Bundle;
import android.os.Environment;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.example.erweimascan.MyApplication;
import com.example.erweimascan.R;
import com.example.watercamera.util.SystemMethod;

public class WaterCameraActivity extends Activity {

	private Context mContext;
	private ImageView mBack;
	private SurfaceView mSurfaceView;
	private ImageView mCamera_sd;
	private ImageView mTackPic;
	private ViewPager mViewPager;

	private Camera camera;
	private Camera.Parameters parameters = null;
	private List<View> views = new ArrayList<View>();
	private int waterType = 0;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.waterphoto_camera);
		mContext = this;

		findView();
		init();
	}

	private void findView() {
		mBack = (ImageView) findViewById(R.id.back);
		mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView);
		mCamera_sd = (ImageView) findViewById(R.id.camera_sd);
		mTackPic = (ImageView) findViewById(R.id.tack_pic);
		mViewPager = (ViewPager) findViewById(R.id.viewPager);
	}

	private void init() {
		mSurfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		mSurfaceView.getHolder().setFixedSize(176, 144);// surfaceView 分辨率
		mSurfaceView.getHolder().setKeepScreenOn(true);
		mSurfaceView.getHolder().addCallback(new MySurfaceViewCallback());

		mTackPic.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				if (camera != null) {
					camera.takePicture(null, null, new MyPictureCallback());
				}
			}
		});

		// viewPager
		LayoutInflater inflater = LayoutInflater.from(mContext);
		views.add(inflater.inflate(R.layout.water_camera_page1, null));
		views.add(inflater.inflate(R.layout.water_camera_page2, null));
		views.add(inflater.inflate(R.layout.water_camera_page3, null));
		views.add(inflater.inflate(R.layout.water_camera_page4, null));
		views.add(inflater.inflate(R.layout.water_camera_page5, null));

		mViewPager.setAdapter(new MyViewPagerAdapter());
		mViewPager.setOnPageChangeListener(new MyOnPagerChangeListener());

	}

	private class MyPictureCallback implements PictureCallback {

		@Override
		public void onPictureTaken(byte[] data, Camera camera) {
			String photoName = System.currentTimeMillis()   ".jpg";
			// String
			// path=Environment.getExternalStorageDirectory() "/waterphoto/" photoName;
//			int result = SystemMethod.saveBitmap(path, data);
			((MyApplication)getApplication()).setBitmap(BitmapFactory.decodeByteArray(data, 0, data.length));
			Intent intent = new Intent(mContext, WaterPhotoActivity.class);
			intent.putExtra("waterType", waterType);
			startActivityForResult(intent, 0);
		}

	}

	private class MySurfaceViewCallback implements Callback {

		@Override
		public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
			parameters = camera.getParameters();// 设置相机参数
			parameters.setPictureFormat(PixelFormat.JPEG);
			parameters.setPreviewSize(width, height);// 预览大小
			parameters.setPreviewFrameRate(5);// 帧
			parameters.setPictureSize(width, height);// 保存图片大小
			parameters.setJpegQuality(80);// 图片质量

		}

		@Override
		public void surfaceCreated(SurfaceHolder holder) {
			try {
				camera = Camera.open();
				camera.setPreviewDisplay(holder);
				camera.setDisplayOrientation(getPreviewDegree(WaterCameraActivity.this));
				camera.startPreview();
			} catch (IOException e) {
				e.printStackTrace();
			}

		}

		@Override
		public void surfaceDestroyed(SurfaceHolder holder) {

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

	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if (camera != null) {
			camera.startPreview();
		}
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
		if (camera != null) {
			camera.release();
			camera = null;
		}
	}

	public static int getPreviewDegree(Activity activity) {
		// 获得手机的方向
		int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
		int degree = 0;
		// 根据手机的方向计算相机预览画面应该选择的角度
		switch (rotation) {
		case Surface.ROTATION_0:
			degree = 90;
			break;
		case Surface.ROTATION_90:
			degree = 0;
			break;
		case Surface.ROTATION_180:
			degree = 270;
			break;
		case Surface.ROTATION_270:
			degree = 180;
			break;
		}
		return degree;
	}

	// ////////////////////////////////////////////////////////////////////
	// viewPager
	private class MyViewPagerAdapter extends PagerAdapter {
		@Override
		public int getCount() {
			return views.size();
		}

		@Override
		public boolean isViewFromObject(View arg0, Object arg1) {
			return arg0 == arg1;
		}

		@Override
		public void destroyItem(ViewGroup container, int position, Object object) {
			container.removeView(views.get(position));
		}

		@Override
		public Object instantiateItem(ViewGroup container, int position) {
			container.addView(views.get(position));
			return views.get(position);
		}

	}

	private class MyOnPagerChangeListener implements OnPageChangeListener {

		@Override
		public void onPageScrollStateChanged(int arg0) {

		}

		@Override
		public void onPageScrolled(int arg0, float arg1, int arg2) {

		}

		@Override
		public void onPageSelected(int arg0) {
			waterType = arg0;
		}

	}

}