<!-- 授予该程序录制声音的权限 -->     <uses-permission android:name="android.permission.RECORD_AUDIO" />     <!-- 授予该程序使用摄像头的权限 -->     <uses-permission android:name="android.permission.CAMERA" />     <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />     <!-- 授予使用外部存储的权限 -->     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context=".MainActivity" >     <SurfaceView         android:id="@+id/dView"         android:layout_width="match_parent"         android:layout_height="match_parent" />     <LinearLayout         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_alignParentBottom="true"          android:orientation="horizontal" >         <Button             android:id="@+id/record"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_weight="1"             android:text="@string/record" />         <Button             android:id="@+id/stop"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_weight="1"             android:text="@string/stop" />     </LinearLayout> </RelativeLayout>

package com.android.xiong.videotest; import java.io.File; import android.app.Activity; import android.hardware.Camera; import android.media.MediaRecorder; import android.os.Bundle; import android.os.Environment; import android.view.Menu; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class MainActivity extends Activity implements OnClickListener {  Button record, stop;  // 系统视频文件  File viodFile;  MediaRecorder mRecorder;  // 显示视频的SurfaceView  SurfaceView sView;  // 记录是否正在进行录制  boolean isRecording = false;  Camera camera;  @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.activity_main);   record = (Button) findViewById(R.id.record);   stop = (Button) findViewById(R.id.stop);   sView = (SurfaceView) findViewById(R.id.dView);   // stop按钮不可用   stop.setEnabled(false);   // 设置Surface不需要维护自己的缓冲区   sView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);   // 设置分辨率   sView.getHolder().setFixedSize(320, 280);   // 设置该组件不会让屏幕自动关闭   sView.getHolder().setKeepScreenOn(true);   record.setOnClickListener(this);   stop.setOnClickListener(this);  }  @Override  public boolean onCreateOptionsMenu(Menu menu) {   // Inflate the menu; this adds items to the action bar if it is present.   getMenuInflater().inflate(R.menu.main, menu);   return true;  }  @Override  public void onClick(View v) {   switch (v.getId()) {   case R.id.record:    if (!Environment.getExternalStorageState().equals(      Environment.MEDIA_MOUNTED)) {     Toast.makeText(this, "SD卡不存在，请插卡！", Toast.LENGTH_SHORT).show();     return;    }    try {     // 创建MediaPlayer对象     mRecorder = new MediaRecorder();     mRecorder.reset();    /* camera = Camera.open();     camera.unlock();     camera.setDisplayOrientation(0);     mRecorder.setCamera(camera);*/     // 创建保存录制视频的视频文件     viodFile = new File(Environment.getExternalStorageDirectory()       .getCanonicalFile() + "/myvideo.mp4");     if (!viodFile.exists())      viodFile.createNewFile();     // 设置从麦克风采集声音     mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);     // 设置从摄像头采集图像     mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);     // 设置视频、音频的输出格式     mRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);     // 设置音频的编码格式、     mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);     // 设置图像编码格式     mRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);     mRecorder.setOrientationHint(90);     //mRecorder.setVideoSize(320, 280);     // mRecorder.setVideoFrameRate(5);     mRecorder.setOutputFile(viodFile.getAbsolutePath());     // 指定SurfaceView来预览视频     mRecorder.setPreviewDisplay(sView.getHolder().getSurface());     mRecorder.prepare();     // 开始录制     mRecorder.start();     // 让record按钮不可用     record.setEnabled(false);     // 让stop按钮可用     stop.setEnabled(true);     isRecording = true;    } catch (Exception e) {     e.printStackTrace();    }    break;   case R.id.stop:    // 如果正在录制    if (isRecording) {     // 停止录制     mRecorder.stop();     // 释放资源     mRecorder.release();     mRecorder = null;     // 让record按钮可用     record.setEnabled(true);     // 让stop按钮不可用     stop.setEnabled(false);    }    break;   default:    break;   }  } }