android自定义Camera实现录像和拍照

package com.example.myvideocamera;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.List;import android.app.Activity;import android.content.pm.ActivityInfo;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Matrix;import android.hardware.Camera;import android.hardware.Camera.AutoFocusCallback;import android.hardware.Camera.Parameters;import android.hardware.Camera.PictureCallback;import android.hardware.Camera.Size;import android.hardware.Sensor;import android.hardware.SensorEvent;import android.hardware.SensorEventListener;import android.hardware.SensorManager;import android.media.MediaRecorder;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.view.SurfaceHolder;import android.view.SurfaceHolder.Callback;import android.view.SurfaceView;import android.view.View;import android.view.View.OnClickListener;import android.view.WindowManager;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;/** * 视频录制 */@SuppressWarnings("deprecation")public class MainActivity extends Activity implements OnClickListener, SensorEventListener, Callback { private SurfaceView surfaceView; // 用于绘制缓冲图像的 private Button luXiang_bt; // 开始录制的按钮 private Button tingZhi_bt; // 停止录制的按钮 private Button auto_focus; // 进行对焦 private Button screenshot; // 截图 private TextView time_tv; // 显示时间的文本框 private MediaRecorder mRecorder; private boolean recording; // 记录是否正在录像,fasle为未录像, true 为正在录像 private File videoFolder; // 存放视频的文件夹 private File videFile; // 视频文件 private Handler handler; private int time; // 时间 private Camera myCamera; // 相机声明 private SurfaceHolder holder; // 用来访问surfaceview的接口 private SensorManager sManager; // 传感器管理者 private Sensor sensor; // 传感器对象 private int mX, mY, mZ; // x y z 坐标 private Calendar calendar; // 日历 private long lasttimestamp = 0; // 上一次用时的标志 /** * 录制过程中,时间变化 */ private Runnable timeRun = new Runnable() { @Override public void run() {  time++;  time_tv.setText(time + "秒");  handler.postDelayed(timeRun, 1000); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);// 强制横屏 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,  WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.activity_main); initView(); initSensor(); initCreateFile(); } /** * 对传感器进行初始化 */ private void initSensor() { sManager = (SensorManager) getSystemService(SENSOR_SERVICE); sensor = sManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); if (sManager == null) {  // throw new IllegalArgumentException("SensorManager is null"); } sManager.registerListener(this, sensor,  SensorManager.SENSOR_DELAY_NORMAL); } /** * 文件的创建 */ private void initCreateFile() { // 判断sd卡是否存在 boolean sdCardExist = Environment.getExternalStorageState().equals(  android.os.Environment.MEDIA_MOUNTED); if (sdCardExist) {  // 设定存放视频的文件夹的路径  String path = Environment.getExternalStorageDirectory()   .getAbsolutePath()   + File.separator   + "VideoFolder"   + File.separator;  // 声明存放视频的文件夹的File对象  videoFolder = new File(path);  // 如果不存在此文件夹,则创建  if (!videoFolder.exists()) {  videoFolder.mkdirs();  }  // 设置surfaceView不管理的缓冲区  surfaceView.getHolder().setType(   SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);  // 设置surfaceView分辨率  //surfaceView.getHolder().setFixedSize(1000, 500);  luXiang_bt.setOnClickListener(this); } else  Toast.makeText(this, "未找到sdCard!", Toast.LENGTH_LONG).show(); } /** * 初始化工作 */ private void initView() { // 获取控件 surfaceView = (SurfaceView) findViewById(R.id.surfaceview); luXiang_bt = (Button) findViewById(R.id.luXiang_bt); tingZhi_bt = (Button) findViewById(R.id.tingZhi_bt); time_tv = (TextView) findViewById(R.id.time); auto_focus = (Button) findViewById(R.id.auto_focus); screenshot = (Button) findViewById(R.id.screenshot); handler = new Handler(); holder = surfaceView.getHolder(); tingZhi_bt.setOnClickListener(this); auto_focus.setOnClickListener(this); screenshot.setOnClickListener(this); // 添加回调 holder.addCallback(this); } /** * 将Camera和mediaRecoder释放 */ @Override protected void onDestroy() { handler.removeCallbacks(timeRun); if (mRecorder != null) {  mRecorder.release(); } if (myCamera != null) {  myCamera.stopPreview();  myCamera.release(); } super.onDestroy(); } /** * 控件点击事件的监听 */ @Override public void onClick(View v) { switch (v.getId()) { case R.id.luXiang_bt: // 录像点击事件  if (!recording) {  try {   // 获取当前时间,作为视频文件的文件名   String nowTime = java.text.MessageFormat.format(    "{0,date,yyyyMMdd_HHmmss}",    new Object[] { new java.sql.Date(System     .currentTimeMillis()) });   // 声明视频文件对象   videFile = new File(videoFolder.getAbsoluteFile()    + File.separator + "video" + nowTime + ".mp4");   // 关闭预览并释放资源   myCamera.unlock();   mRecorder = new MediaRecorder();   mRecorder.setCamera(myCamera);   // 创建此视频文件   videFile.createNewFile();   mRecorder.setPreviewDisplay(surfaceView.getHolder()    .getSurface()); // 预览   mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); // 视频源   mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); // 录音源为麦克风   mRecorder    .setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); // 输出格式为mp4   /**     *引用android.util.DisplayMetrics 获取分辨率    */   // DisplayMetrics dm = new DisplayMetrics();   // getWindowManager().getDefaultDisplay().getMetrics(dm);   mRecorder.setVideoSize(800, 480); // 视频尺寸   mRecorder.setVideoEncodingBitRate(2*1280*720); //设置视频编码帧率   mRecorder.setVideoFrameRate(30); // 视频帧频率   mRecorder    .setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP); // 视频编码   mRecorder    .setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); // 音频编码   mRecorder.setMaxDuration(1800000); // 设置最大录制时间   mRecorder.setOutputFile(videFile.getAbsolutePath()); // 设置录制文件源   mRecorder.prepare(); // 准备录像   mRecorder.start(); // 开始录像   time_tv.setVisibility(View.VISIBLE); // 设置文本框可见   handler.post(timeRun); // 调用Runable   recording = true; // 改变录制状态为正在录制   setAutofocus();  } catch (IOException e1) {   e1.printStackTrace();  } catch (IllegalStateException e) {   e.printStackTrace();  }  } else  Toast.makeText(MainActivity.this, "视频正在录制中...",   Toast.LENGTH_LONG).show();  break; case R.id.tingZhi_bt: // 停止点击事件  if (recording) {  mRecorder.stop();  mRecorder.release();  handler.removeCallbacks(timeRun);  time_tv.setVisibility(View.GONE);  int videoTimeLength = time;  time = 0;  recording = false;  Toast.makeText(   MainActivity.this,   videFile.getAbsolutePath() + " " + videoTimeLength    + "秒", Toast.LENGTH_LONG).show();  }  // 开启相机  if (myCamera == null) {  myCamera = Camera.open();  try {   myCamera.setPreviewDisplay(holder);  } catch (IOException e) {   e.printStackTrace();  }  }  myCamera.startPreview(); // 开启预览  break; case R.id.auto_focus:  setAutofocus();  break; case R.id.screenshot:  myCamera.autoFocus(new AutoFocusCallback() {  @Override  public void onAutoFocus(boolean success, Camera camera) {   if (success) {   camera.takePicture(null, null, jpegCallBack);   }  }  });  break; } } /** * 设置自动对焦 */ private void setAutofocus() { if (myCamera != null) {  myCamera.autoFocus(new AutoFocusCallback() {  @Override  public void onAutoFocus(boolean success, Camera camera) {   if (success) {   }  }  }); } } /** * 传感器改变调用的方法 */ @Override public void onSensorChanged(SensorEvent event) { if (event.sensor == null) {  return; } if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {  int x = (int) event.values[0];  int y = (int) event.values[1];  int z = (int) event.values[2];  calendar = Calendar.getInstance();  long stamp = calendar.getTimeInMillis();  int px = Math.abs(mX - x);  int py = Math.abs(mY - y);  int pz = Math.abs(mZ - z);  int maxValue = getMaxValue(px, py, pz);  if (maxValue > 2 && (stamp - lasttimestamp) > 30) {  lasttimestamp = stamp;  setAutofocus();  }  mX = x;  mY = y;  mZ = z; } } /** * 获取最大改变的值 */ private int getMaxValue(int px, int py, int pz) { int max = 0; if (px > py && px > pz) {  max = px; } else if (py > px && py > pz) {  max = py; } else if (pz > px && pz > py) {  max = pz; } return max; } @Override public void onAccuracyChanged(Sensor sensor, int accuracy) { } /** * suraceView 创建执行的操作 */ @Override public void surfaceCreated(SurfaceHolder holder) { // 开启相机 if (myCamera == null) {  myCamera = Camera.open();  try {  myCamera.setPreviewDisplay(holder);  } catch (IOException e) {  e.printStackTrace();  } } } /** * suraceView 状态改变执行的操作 */ @Override public void surfaceChanged(SurfaceHolder holder, int format, int width,  int height) { // 开始预览 myCamera.startPreview(); Parameters parameters = myCamera.getParameters();// 获取mCamera的参数对象  Size largestSize = getBestSupportedSize(parameters   .getSupportedPreviewSizes());  parameters.setPreviewSize(largestSize.width, largestSize.height);// 设置预览图片尺寸 largestSize = getBestSupportedSize(parameters   .getSupportedPictureSizes());// 设置捕捉图片尺寸  parameters.setPictureSize(largestSize.width, largestSize.height);  myCamera.setParameters(parameters); }  private Size getBestSupportedSize(List<Size> sizes) {  // 取能适用的最大的SIZE  Size largestSize = sizes.get(0);  int largestArea = sizes.get(0).height * sizes.get(0).width;  for (Size s : sizes) {   int area = s.width * s.height;   if (area > largestArea) {   largestArea = area;   largestSize = s;   }  }  return largestSize;  }  /** * suraceView 销毁执行的操作 */ @Override public void surfaceDestroyed(SurfaceHolder holder) { // 关闭预览并释放资源 if (myCamera != null) {  myCamera.stopPreview();  myCamera.release();  myCamera = null; } } /** * 创建jpeg图片回调数据对象 */ private String filepath = ""; private PictureCallback jpegCallBack = new PictureCallback() { @Override public void onPictureTaken(byte[] data, Camera camera) {  Bitmap oldBitmap = BitmapFactory.decodeByteArray(data, 0,    data.length);  Matrix matrix = new Matrix();   matrix.setRotate(90);   Bitmap newBitmap = Bitmap.createBitmap(oldBitmap, 0, 0,    oldBitmap.getWidth(), oldBitmap.getHeight(),    matrix, true);   filepath = Environment.getExternalStorageDirectory()   + File.separator   + new SimpleDateFormat("yyyyMMddHHmmss").format(new Date())   + ".jpg";  File file = new File(filepath);  try {  BufferedOutputStream bos = new BufferedOutputStream(   new FileOutputStream(file));  newBitmap.compress(Bitmap.CompressFormat.JPEG, 85, bos);  bos.flush();  bos.close();  camera.stopPreview();  camera.startPreview();  newBitmap.recycle();  } catch (FileNotFoundException e) {  e.printStackTrace();  } catch (IOException e) {  e.printStackTrace();  } } };}

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ffffff" >  <SurfaceView android:id="@+id/surfaceview" android:layout_width="fill_parent" android:layout_height="fill_parent"/>   <Button  android:id="@+id/tingZhi_bt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentBottom="true" android:text="停止"/>   <Button  android:id="@+id/luXiang_bt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_toLeftOf="@id/tingZhi_bt" android:text="录像"/>  <Button  android:id="@+id/auto_focus" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_toLeftOf="@id/luXiang_bt" android:text="调焦"/>  <Button  android:id="@+id/screenshot" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_toLeftOf="@id/auto_focus" android:text="拍照"/>  <TextView  android:id="@+id/time" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="#FF0000" android:text="1秒" android:visibility="gone" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginBottom="10dp"/> </RelativeLayout>