本文实例为大家分享了android自定义Camera实现录像和拍照的具体代码，供大家参考，具体内容如下
源码：
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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布局：
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<?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> |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/xuwenneng/article/details/50339539
