Android录像，可以预览。

package com.recode; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; import android.app.Activity; import android.graphics.Color; import android.graphics.ImageFormat; import android.hardware.Camera; import android.media.MediaRecorder; import android.os.Bundle; import android.os.Environment; import android.util.DisplayMetrics; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.Window; import android.view.SurfaceHolder.Callback; import android.view.View.OnClickListener; import android.widget.Button; public class CameraVideo extends Activity implements Callback { private Button statRecode;// 开始 录像 private Button stopRecode;// 停止 录像 private SurfaceView mySurfaceView;// surfaceView声明 private SurfaceHolder holder;// surfaceHolder声明 private Camera myCamera;// 相机声明 private MediaRecorder mediaRecorder; private boolean record; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE);// 无标题 setContentView(R.layout.camera_layout); statRecode = (Button) findViewById(R.id.c_recode); stopRecode = (Button) findViewById(R.id.c_stop); mySurfaceView = (SurfaceView) findViewById(R.id.surfaceView1); // 获得holder holder = mySurfaceView.getHolder(); // 添加回调 holder.addCallback(this); // 开始 statRecode.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //按下“停止”按钮后将“开始”按钮设置为可以点击 statRecode.setClickable(false); statRecode.setText("正在录制"); statRecode.setTextColor(Color.RED); // 关闭预览并释放资源 myCamera.stopPreview(); myCamera.release(); myCamera = null; if (mediaRecorder == null) { mediaRecorder = new MediaRecorder(); } mediaRecorder.reset(); // 从照相机采集视频 mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); // 设置音频资源采集方式 mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); // 设置录制完成后视频的封装格式THREE_GPP为3gp.MPEG_4为mp4 mediaRecorder .setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); // 设置视频录制的分辨率。 引用android.util.DisplayMetrics 获取分辨率 DisplayMetrics dm = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(dm); // mediaRecorder.setVideoSize(dm.widthPixels, dm.heightPixels); mediaRecorder.setVideoFrameRate(15); // 设置录制的视频帧率。 每秒15帧 mediaRecorder .setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP); // 设置视频编码方式 mediaRecorder .setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); // 设置音频编码方式 // 用时间来给录的视频命名 String fileName = new SimpleDateFormat("yyyyMMddHHmmss") .format(new Date()); // 保存路径 String path = Environment.getExternalStorageDirectory() .toString() + "/" + fileName + ".mp4"; mediaRecorder.setOutputFile(path);// 设置保存路径 mediaRecorder.setPreviewDisplay(holder.getSurface()); try { mediaRecorder.prepare();// 预期准备 } catch (Exception e) { e.printStackTrace(); } mediaRecorder.start();// 开始刻录 record = true; } }); // 停止 stopRecode.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //按下“停止”按钮后将“开始”按钮设置为可以点击 statRecode.setClickable(true); statRecode.setText("开始录制"); statRecode.setTextColor(Color.BLACK); if (record) { mediaRecorder.stop(); mediaRecorder.release(); mediaRecorder = null; record = false; // 开启相机 if (myCamera == null) { myCamera = Camera.open(); try { myCamera.setPreviewDisplay(holder); } catch (IOException e) { e.printStackTrace(); } } Camera.Parameters params = myCamera.getParameters(); params.setPictureFormat(ImageFormat.JPEG); myCamera.setParameters(params); myCamera.startPreview(); // 开启预览 } } }); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { // 设置参数并开始预览 Camera.Parameters params = myCamera.getParameters(); params.setPictureFormat(ImageFormat.JPEG); myCamera.setParameters(params); myCamera.startPreview(); } @Override public void surfaceCreated(SurfaceHolder holder) { Log.i("gao", "surfaceCreated"); // 开启相机 if (myCamera == null) { myCamera = Camera.open(); try { myCamera.setPreviewDisplay(holder); } catch (IOException e) { e.printStackTrace(); } } } @Override public void surfaceDestroyed(SurfaceHolder holder) { // TODO Auto-generated method stub // 关闭预览并释放资源 if (myCamera != null) { myCamera.stopPreview(); myCamera.release(); myCamera = null; } if (mediaRecorder != null) { mediaRecorder.release(); mediaRecorder = null; } } }