通过Surface实现相机功能 摄像机功能

package cn.itcast.camera;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.app.Activity;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.os.Bundle;
import android.os.Environment;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.Toast;

public class DemoActivity extends Activity implements OnClickListener {
	private SurfaceView sv;
	private Button bt_take_pic, bt_auto_focus;
	private SurfaceHolder holder;
	private 		Camera camera ;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //隐藏掉activity的标题栏 
        // 必须写到setcontentview之前 
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        //实现窗体的全屏显示
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.main);
        sv = (SurfaceView) this.findViewById(R.id.sv);
        bt_take_pic = (Button) this.findViewById(R.id.bt_take_pic);
        bt_auto_focus = (Button) this.findViewById(R.id.bt_auto_focus); 
        bt_take_pic.setOnClickListener(this);
        bt_auto_focus.setOnClickListener(this);
        holder =   sv.getHolder();
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        holder.addCallback(new MyHolderCallback());
        
    }

	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.bt_auto_focus:
			//自动对焦
			camera.autoFocus(null);
			break;

		case R.id.bt_take_pic:
			//拍照 
			//ShutterCallback 
			// raw 未经过处理的意思 
			camera.takePicture(null, null, new MyPicCallback());
			break;
		}
		
	}
	private class MyPicCallback implements Camera.PictureCallback{

		public void onPictureTaken(byte[] data, Camera camera) {
			if(Environment.MEDIA_MOUNTED.equals( Environment.getExternalStorageState())){
				try {
					File file = new File(Environment.getExternalStorageDirectory(),System.currentTimeMillis()+".jpg");
					FileOutputStream fos = new FileOutputStream(file);
					fos.write(data);
					fos.flush();
					fos.close();
					
				} catch (Exception e) {
					Toast.makeText(getApplicationContext(), "保存照片失败", 0).show();
					e.printStackTrace();
				}finally{
					camera.startPreview();
				}
			}else{
				Toast.makeText(getApplicationContext(), "sd卡不可用", 0).show();
			}
		}
	}
	
	
	private class MyHolderCallback implements SurfaceHolder.Callback{

		public void surfaceCreated(SurfaceHolder holder) {
			System.out.println("holder 被创建 ");
			DemoActivity.this.holder = holder;
			camera = Camera.open();
			// 要想给照相机设置参数 必须要知道你的相机支持什么样子的参数 否则可能导致不兼容
			//System.out.println(camera.getParameters().flatten());
			Camera.Parameters parms = camera.getParameters();
			parms.setPreviewFrameRate(5);
			parms.setPictureSize(1280, 960);
			parms.setPictureFormat(PixelFormat.JPEG);//设置照片的输出格式
			parms.set("jpeg-quality", 85);//照片质量

			camera.setParameters(parms);
			try {
				camera.setPreviewDisplay(holder);
			} catch (IOException e) {
				e.printStackTrace();
			}//通过SurfaceView显示取景画面
			camera.startPreview();//开始预览


		}

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

		public void surfaceDestroyed(SurfaceHolder holder) {
			System.out.println("holder被销毁");
			camera.release();
			camera = null;

		}
		
	}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <SurfaceView
        android:layout_weight="100"
        android:id="@+id/sv"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

    <RelativeLayout
        android:layout_weight="0"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <Button
            android:id="@+id/bt_take_pic"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:text="拍照" />

        <Button
            android:id="@+id/bt_auto_focus"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_toLeftOf="@id/bt_take_pic"
            android:text="对焦" />
    </RelativeLayout>

</LinearLayout>

任何是摄像机功能:

package cn.itcast.videorecoder;

import java.io.IOException;

import android.app.Activity;
import android.hardware.Camera;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;

public class DemoActivity extends Activity implements OnClickListener {
	private Button bt_start, bt_stop;
	private SurfaceView sv;
	private SurfaceHolder holder;
	private Camera  camera;
	MediaRecorder recorder;
		
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //隐藏掉activity的标题栏 
        // 必须写到setcontentview之前 
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        //实现窗体的全屏显示
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
       
        setContentView(R.layout.main);
        bt_start = (Button) this.findViewById(R.id.bt_start);
        bt_stop =(Button)this.findViewById(R.id.bt_stop);
        bt_start.setOnClickListener(this);
        bt_stop.setOnClickListener(this);
        sv = (SurfaceView) this.findViewById(R.id.sv);
        holder = sv.getHolder();
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        holder.addCallback(new MySurfaceCallback());
    }

    private class MySurfaceCallback implements SurfaceHolder.Callback{

		public void surfaceCreated(SurfaceHolder holder) {
			System.out.println("surface oncreate");
			DemoActivity.this.holder = holder;
/*			camera = Camera.open();
			try {
				camera.setPreviewDisplay(holder);
			} catch (IOException e) {
				e.printStackTrace();
			}
			camera.startPreview();*/
		}

		public void surfaceChanged(SurfaceHolder holder, int format, int width,
				int height) {
			// TODO Auto-generated method stub
			
		}

		public void surfaceDestroyed(SurfaceHolder holder) {
			System.out.println("surface destroy");
		/*	camera.release();
			camera = null;*/
		}
    	
    }
    
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.bt_start:
			bt_start.setEnabled(false);
			bt_stop.setEnabled(true);
			recorder = new MediaRecorder();
/*			recorder.reset();
//			recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
			recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
			recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
//			recorder.setAudioChannels(2);
//			recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
			recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
			recorder.setVideoSize(320, 240);
			recorder.setVideoFrameRate(3); //每秒3帧

			recorder.setOutputFile("/mnt/sdcard/itcast.3gp");
			recorder.setPreviewDisplay(holder.getSurface());
			try {
				recorder.prepare();
			} catch (IllegalStateException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}//预期准备
			recorder.start();//开始刻录
*/
			recorder.reset();
			recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //从照相机采集视频
			recorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
			recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
			recorder.setVideoSize(720, 480);
			recorder.setVideoFrameRate(3); //每秒3帧
			recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263); //设置视频编码方式
			recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
			recorder.setOutputFile("/mnt/sdcard/itcast.3gp");
			recorder.setPreviewDisplay(holder.getSurface());
			try {
				recorder.prepare();
			} catch (IllegalStateException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}//预期准备
			recorder.start();//开始刻录
			break;

		case R.id.bt_stop:
			bt_start.setEnabled(true);
			bt_stop.setEnabled(false);
			if(recorder!=null){
				recorder.stop();
				recorder.release();
				recorder = null;
			}
			
			break;
		}
		
	}
}