Android视频录制

package cn.itcast.videorecord;

import java.io.File;

import android.app.Activity;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
	private static final String TAG = "MainActivity";
    private SurfaceView surfaceView;
    private MediaRecorder mediaRecorder;
    private boolean record;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        mediaRecorder = new MediaRecorder();
        surfaceView = (SurfaceView) this.findViewById(R.id.surfaceView);
        /*下面设置Surface不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到用户面前*/
        this.surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        this.surfaceView.getHolder().setFixedSize(320, 240);//设置分辨率

        ButtonClickListener listener = new ButtonClickListener();
        Button stopButton = (Button) this.findViewById(R.id.stop);
        Button recordButton = (Button) this.findViewById(R.id.record);
        stopButton.setOnClickListener(listener);
        recordButton.setOnClickListener(listener);        
    }
    
    @Override
	protected void onDestroy() {
    	mediaRecorder.release();
		super.onDestroy();
	}

	private final class ButtonClickListener implements View.OnClickListener{
		@Override
		public void onClick(View v) {
			if(!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
				Toast.makeText(MainActivity.this, R.string.sdcarderror, 1).show();
				return ;
			}
			try {
				switch (v.getId()) {
				case R.id.record:
					mediaRecorder.reset();
					mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //从照相机采集视频
					mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
					mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
					mediaRecorder.setVideoSize(320, 240);
					mediaRecorder.setVideoFrameRate(3); //每秒3帧
					mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263); //设置视频编码方式
					mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
					File videoFile = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis()+".3gp");
					mediaRecorder.setOutputFile(videoFile.getAbsolutePath());
					mediaRecorder.setPreviewDisplay(surfaceView.getHolder().getSurface());
					mediaRecorder.prepare();//预期准备
					mediaRecorder.start();//开始刻录
					record = true;
					break;

				case R.id.stop:
					if(record){
						mediaRecorder.stop();
						record = false;
					}
					break;
				}
			} catch (Exception e) {
				Toast.makeText(MainActivity.this, R.string.error, 1).show();
				Log.e(TAG, e.toString());
			}
		}
    	
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:background="#ffffff"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<SurfaceView
    android:layout_width="fill_parent" 
    android:layout_height="220dip" 
    android:id="@+id/surfaceView"
    />
    <LinearLayout
	    android:orientation="horizontal"
	    android:layout_width="fill_parent"
	    android:layout_height="fill_parent"
	    android:gravity="right"
	    >
	    <Button
		    android:layout_width="wrap_content" 
		    android:layout_height="wrap_content" 
		    android:text="@string/record"
		    android:id="@+id/record"
		    />
	    <Button
		    android:layout_width="wrap_content" 
		    android:layout_height="wrap_content" 
		    android:layout_marginLeft="10dip"
		    android:text="@string/stop"
		    android:id="@+id/stop"
		    />
    </LinearLayout>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="cn.itcast.videorecord"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name" android:screenOrientation="landscape">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
    <uses-sdk android:minSdkVersion="7" />
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
 <uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

</manifest>