カメラ映像の録音・録画:Android

package com.camera_test0;

import java.io.File;

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

import android.os.Environment;
import android.app.Activity;
import android.hardware.Camera;
import android.hardware.Camera.Size;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup.LayoutParams;

public class CameraTest0Activity extends Activity {
 /** Called when the activity is first created. */
 private Camera myCamera;
 private SurfaceView mySurfaceView;
 private boolean isRecording;
 private MediaRecorder mediaRecorder;
private SurfaceHolder v_holder;

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  mySurfaceView = (SurfaceView) findViewById(R.id.surfaceView1);
  SurfaceHolder holder = mySurfaceView.getHolder();
  holder.addCallback(mSurfaceListener);
  holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

  myCamera = getCameraInstance();//

 }

 private SurfaceHolder.Callback mSurfaceListener = new SurfaceHolder.Callback() {

  public void surfaceCreated(SurfaceHolder holder) {
   // TODO Auto-generated method stub
   
   try {
    myCamera.setPreviewDisplay(holder);
   } catch (Exception e) {
    e.printStackTrace();
   }
  }

  public void surfaceDestroyed(SurfaceHolder holder) {
   // TODO Auto-generated method stub
   //myCamera.release();
   //myCamera = null;
   
   myCamera.setPreviewCallback(null);
   myCamera.stopPreview();
   myCamera.release();
   myCamera = null;
  }

  public void surfaceChanged(SurfaceHolder holder, int format, int width,
    int height) {
   // TODO Auto-generated method stub
   v_holder = holder; // SurfaceHolderを保存
   
   myCamera.stopPreview();
    Camera.Parameters parameters = myCamera.getParameters();
    
   List<Size> asizeSupport = parameters.getSupportedPreviewSizes();
   //一番小さいプレビューサイズを利用
   Size size = asizeSupport.get(asizeSupport.size() - 1);
   parameters.setPreviewSize(size.width,size.height);
   Log.d("size1", "w=" + String.valueOf(width) + "h=" + String.valueOf(height));// 
   Log.d("size2", "w=" + String.valueOf(size.width) + "h=" + String.valueOf(size.height));// 
   
   LayoutParams paramLayout;
   paramLayout = mySurfaceView.getLayoutParams();
   paramLayout.width = size.width;
   paramLayout.height = size.height;
   mySurfaceView.setLayoutParams(paramLayout);
      // camera.setDisplayOrientation(90);// カメラを回転
      
      //List<Camera.Size> size = parameters.getSupportedPreviewSizes();
    
      //Log.d("カメラのサイズ", "w=" + String.valueOf(size.get(0).width) + "h=" + String.valueOf(size.get(0).height));// 
      //parameters.setPreviewSize(size.get(0).width, size.get(0).height);
     // myCamera.setParameters(parameters);
      myCamera.startPreview();//
  }
 };


 public void click(View v) {
  // 録画中でなければ録画を開始
  if (!isRecording) {
   initializeVideoSettings(); // MediaRecorderの設定
   // myRecorder.start(); // 録画開始
   isRecording = true; // 録画中のフラグを立てる

   // 録画中であれば録画を停止
  } else {
   mediaRecorder.stop(); // 録画停止
   mediaRecorder.reset(); // 無いとmediarecorder went away with unhandled
         // events　が発生
   mediaRecorder.release();//
   mediaRecorder = null;
   //myCamera.lock();
   //myCamera.release(); // release the camera for other applications
   //myCamera = null;
   isRecording = false; // 録画中のフラグを外す
   
   
  }
 }


 private void initializeVideoSettings() {
  // TODO 自動生成されたメソッド・スタブ
  try {
   //myCamera = getCameraInstance();
   mediaRecorder = new MediaRecorder();
   //mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
   //mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
   
   myCamera.unlock();
   mediaRecorder.setCamera( myCamera );
   
   mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); // 録画の入力ソースを指定
   mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
   
   mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); // ファイルフォーマットを指定
   
   mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP); // ビデオエンコーダを指定
   mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

   //CamcorderProfile profile = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
   //mediaRecorder.setProfile(profile);
   
   mediaRecorder.setVideoFrameRate(15); // 動画のフレームレートを指定
   mediaRecorder.setVideoSize(320, 240); // 動画のサイズを指定
   
   File folder = Environment.getExternalStorageDirectory();
   File file;

   file = File.createTempFile("sample20110603", ".mp4", folder);//

   //mFile = Environment.getExternalStorageDirectory().getAbsolutePath();

   mediaRecorder.setOutputFile(file.getAbsolutePath());
   mediaRecorder.setPreviewDisplay(v_holder.getSurface());//

   mediaRecorder.prepare();
   mediaRecorder.start();
  } catch (IOException e) {
   // TODO 自動生成された catch ブロック
   e.printStackTrace();
  }
 }
 private Camera getCameraInstance() {
  // TODO 自動生成されたメソッド・スタブ
   Camera c = null;
      try {
          c = Camera.open( 1 ); // attempt to get a Camera instance
      }
      catch (Exception e){
          // Camera is not available (in use or does not exist)
      }
      return c; // returns null if camera is unavailable
 }

}

参考サイト:
Androidで簡単なカメラアプリを作る
ソフトウェア技術ドキュメントを勝手に翻訳 c.3 カメラ