Android开发之拍照功能实现

Android开发之拍照功能实现（附源码）

package org.winplus.camera;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.KeyEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.View.onclickListener;
import android.widget.Button;

public class CameraDemoActivity extends Activity{

	private final static String TAG = “CameraActivity“;
	private SurfaceView surfaceView;
	private SurfaceHolder surfaceHolder;
	private Camera camera;
	private File picture;
	private Button btnSave;
	
	@Override
	public void onCreate（Bundle savedInstanceState） {
		super.onCreate（savedInstanceState）;
		setRequestedOrientation（ActivityInfo.SCREEN_ORIENTATION_PORTRAIT）;
		this.requestWindowFeature（Window.FEATURE_NO_title）;
		setContentView（R.layout.main）;
		setupViews（）;
	}
	
	private void setupViews（）{
		surfaceView = （SurfaceView） findViewById（R.id.camera_preview）; // Camera interface to instantiate components
		surfaceHolder = surfaceView.getHolder（）; // Camera interface to instantiate components
		surfaceHolder.addCallback（surfaceCallback）; // Add a callback for the SurfaceHolder
		surfaceHolder.setType（SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS）;
		
		btnSave = （Button） findViewById（R.id.save_pic）;
		
		btnSave.setonclickListener（new onclickListener（） {
			
			@Override
			public void onclick（View v） {
				takePic（）;
			}
		}）;
	}
	
	
	@Override
	public boolean onkeydown（int keyCode KeyEvent event） {
		if （keyCode == KeyEvent.KEYCODE_CAMERA
				|| keyCode == KeyEvent.KEYCODE_SEARCH） {
			takePic（）;
			return true;
		}
		return super.onkeydown（keyCode event）;
	}

	private void takePic（） {

		camera.stopPreview（）;// stop the preview

		camera.takePicture（null null pictureCallback）; // picture
	}

	// Photo call back
	Camera.PictureCallback pictureCallback = new Camera.PictureCallback（） {
		//@Override
		public void onPictureTaken（byte[] data Camera camera） {
			new SavePictureTask（）.execute（data）;
			camera.startPreview（）;
		}
	};

	// save pic
	class SavePictureTask extends AsyncTask {
		@Override
		protected String doInBackground（byte[]... params） {
			String fname = DateFormat.format（“yyyyMMddhhmmss“ new Date（））.toString（）+“.jpg“;
			
			Log.i（TAG “fname=“+fname+“;dir=“+Environment.getExternalStorageDirectory（））;
			//picture = new File（Environment.getExternalStorageDirectory（）fname）;// create file
			
			picture = new File（Environment.getExternalStorageDirectory（）+“/“+fname）;
			
			try {
				FileOutputStream fos = new FileOutputStream（picture.getPath（））; // Get file output stream
				fos.write（params[0]）; // Written to the file
	

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件        364  2011-11-29 15:53  CameraDemo\.classpath

     文件        846  2011-11-29 15:53  CameraDemo\.project

     文件       1614  2011-12-03 10:04  CameraDemo\AndroidManifest.xml

     文件       1248  2011-11-29 15:53  CameraDemo\proguard.cfg

     文件        361  2011-11-29 15:53  CameraDemo\project.properties

     文件       4147  2011-11-29 15:53  CameraDemo\res\drawable-hdpi\ic_launcher.png

     文件       1723  2011-11-29 15:53  CameraDemo\res\drawable-ldpi\ic_launcher.png

     文件       2574  2011-11-29 15:53  CameraDemo\res\drawable-mdpi\ic_launcher.png

     文件        752  2011-12-03 10:00  CameraDemo\res\layout\main.xml

     文件        163  2011-12-03 10:00  CameraDemo\res\values\strings.xml

     文件       4330  2011-12-03 10:04  CameraDemo\src\org\winplus\camera\CameraDemoActivity.java

     目录          0  2011-12-03 10:04  CameraDemo\src\org\winplus\camera

     目录          0  2011-12-03 10:04  CameraDemo\src\org\winplus

     目录          0  2011-12-03 10:04  CameraDemo\res\drawable-hdpi

     目录          0  2011-12-03 10:04  CameraDemo\res\drawable-ldpi

     目录          0  2011-12-03 10:04  CameraDemo\res\drawable-mdpi

     目录          0  2011-12-03 10:04  CameraDemo\res\layout

     目录          0  2011-12-03 10:04  CameraDemo\res\values

     目录          0  2011-12-03 10:04  CameraDemo\src\org

     目录          0  2011-12-03 10:04  CameraDemo\assets

     目录          0  2011-12-03 10:04  CameraDemo\res

     目录          0  2011-12-03 10:04  CameraDemo\src

     目录          0  2011-12-03 10:04  CameraDemo

----------- ---------  ---------- -----  ----

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