android camera2 demo
效果图
package com.pepe.aplayer;
import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.ImageFormat;
import android.graphics.Rect;
import android.graphics.SurfaceTexture;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCaptureSession;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraDevice;
import android.hardware.camera2.CameraManager;
import android.hardware.camera2.CaptureRequest;
import android.hardware.camera2.params.StreamConfigurationMap;
import android.media.AudioAttributes;
import android.media.Image;
import android.media.ImageReader;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import android.util.Size;
import android.view.LayoutInflater;
import android.view.Surface;
import android.view.TextureView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class AFragment extends Fragment {
private static final String TAG = "Camera2Fragment";
private static final int SETIMAGE = 1;
private static final int MOVE_FOCK = 2;
/**
* Max preview width that is guaranteed by Camera2 API
*/
private static final int MAX_PREVIEW_WIDTH = 1920;
/**
* Max preview height that is guaranteed by Camera2 API
*/
private static final int MAX_PREVIEW_HEIGHT = 1080;
private TextureView mTextureView;
private ImageView mThumbnail;
private Button mButton;
private Handler mHandler;
private Handler mUIHandler;
private ImageReader mImageReader;
private CaptureRequest.Builder mPreViewBuidler;
private CameraCaptureSession mCameraSession;
private CameraCharacteristics mCameraCharacteristics;
private Ringtone ringtone;
private Surface surface;
private Size mPreViewSize;
private Rect maxZoomrect;
private int maxRealRadio;
//相机缩放相关
private Rect picRect;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle
savedInstanceState) {
View v = inflater.inflate(R.layout.activity_main, container,false);
findView(v);
mUIHandler = new Handler(new InnerCallBack());
//初始化拍照的声音
ringtone = RingtoneManager.getRingtone(getActivity(), Uri.parse
("file:///system/media/audio/ui/camera_click.ogg"));
AudioAttributes.Builder attr = new AudioAttributes.Builder();
attr.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION);
ringtone.setAudioAttributes(attr.build());
//初始化相机布局
mTextureView.setSurfaceTextureListener(mSurfacetextlistener);
// mTextureView.setOnTouchListener(textTureOntuchListener);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
int i = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (i != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(getActivity(),
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE},
111);
}
}
return v;
}
@Override
public void onDestroyView() {
super.onDestroyView();
if (mCameraSession != null) {
mCameraSession.getDevice().close();
mCameraSession.close();
}
}
private void findView(View v) {
mTextureView = v.findViewById(R.id.tv_textview);
mButton = v.findViewById(R.id.btn_takepic);
mThumbnail = v.findViewById(R.id.iv_Thumbnail);
mThumbnail.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//调用相册
Intent intent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivity(intent);
}
});
}
//打开相机时候的监听器，通过他可以得到相机实例，这个实例可以创建请求建造者
private CameraDevice.StateCallback cameraOpenCallBack = new CameraDevice.StateCallback() {
@Override
public void onOpened(CameraDevice cameraDevice) {
Log.d(TAG, "相机已经打开");
try {
mPreViewBuidler = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
SurfaceTexture texture = mTextureView.getSurfaceTexture();
texture.setDefaultBufferSize(mPreViewSize.getWidth(), mPreViewSize.getHeight());
surface = new Surface(texture);
mPreViewBuidler.addTarget(surface);
cameraDevice.createCaptureSession(Arrays.asList(surface, mImageReader.getSurface
()), new CameraCaptureSession
.StateCallback() {
@Override
public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
try {
mCameraSession = cameraCaptureSession;
cameraCaptureSession.setRepeatingRequest(mPreViewBuidler.build(), null, mHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
@Override
public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {
}
}, mHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
@Override
public void onDisconnected(@NonNull CameraDevice cameraDevice) {
Log.d(TAG, "相机连接断开");
}
@Override
public void onError(@NonNull CameraDevice cameraDevice, int i) {
Log.d(TAG, "相机打开失败");
}
};
//预览图显示控件的监听器，可以监听这个surface的状态
private TextureView.SurfaceTextureListener mSurfacetextlistener = new TextureView
.SurfaceTextureListener() {
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int i, int i1) {
HandlerThread thread = new HandlerThread("Ceamera3");
thread.start();
mHandler = new Handler(thread.getLooper());
CameraManager manager = (CameraManager) getActivity().getSystemService(Context
.CAMERA_SERVICE);
String cameraid = CameraCharacteristics.LENS_FACING_FRONT + "";
try {
mCameraCharacteristics = manager.getCameraCharacteristics(cameraid);
//画面传感器的面积，单位是像素。
maxZoomrect = mCameraCharacteristics.get(CameraCharacteristics
.SENSOR_INFO_ACTIVE_ARRAY_SIZE);
//最大的数字缩放
maxRealRadio = mCameraCharacteristics.get(CameraCharacteristics
.SCALER_AVAILABLE_MAX_DIGITAL_ZOOM).intValue();
picRect = new Rect(maxZoomrect);
StreamConfigurationMap map = mCameraCharacteristics.get(CameraCharacteristics
.SCALER_STREAM_CONFIGURATION_MAP);
Size largest = Collections.max(Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)
), new CompareSizeByArea());
mPreViewSize = map.getOutputSizes(SurfaceTexture.class)[0];
choosePreSize(i, i1, map, largest);
mImageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(),
ImageFormat.JPEG, 5);
mImageReader.setOnImageAvailableListener(new ImageReader
.OnImageAvailableListener() {
@Override
public void onImageAvailable(ImageReader imageReader) {
mHandler.post(new ImageSaver(imageReader.acquireNextImage()));
}
}, mHandler);
if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
manager.openCamera(cameraid, cameraOpenCallBack, mHandler);
//设置点击拍照的监听
mButton.setOnClickListener(picOnClickListener);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
private void choosePreSize(int i, int i1, StreamConfigurationMap map, Size largest) {
int displayRotation = getActivity().getWindowManager().getDefaultDisplay().getRotation();
//noinspection ConstantConditions
Integer mSensorOrientation = mCameraCharacteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
boolean swappedDimensions = false;
switch (displayRotation) {
case Surface.ROTATION_0:
case Surface.ROTATION_180:
if (mSensorOrientation == 90 || mSensorOrientation == 270) {
swappedDimensions = true;
}
break;
case Surface.ROTATION_90:
case Surface.ROTATION_270:
if (mSensorOrientation == 0 || mSensorOrientation == 180) {
swappedDimensions = true;
}
break;
default:
Log.e(TAG, "Display rotation is invalid: " + displayRotation);
}
android.graphics.Point displaySize = new android.graphics.Point();
getActivity().getWindowManager().getDefaultDisplay().getSize(displaySize);
int rotatedPreviewWidth = i;
int rotatedPreviewHeight = i1;
int maxPreviewWidth = displaySize.x;
int maxPreviewHeight = displaySize.y;
if (swappedDimensions) {
rotatedPreviewWidth = i1;
rotatedPreviewHeight = i;
maxPreviewWidth = displaySize.x;
maxPreviewHeight = displaySize.y;
}
if (maxPreviewWidth > MAX_PREVIEW_WIDTH) {
maxPreviewWidth = MAX_PREVIEW_WIDTH;
}
if (maxPreviewHeight > MAX_PREVIEW_HEIGHT) {
maxPreviewHeight = MAX_PREVIEW_HEIGHT;
}
mPreViewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class),
rotatedPreviewWidth, rotatedPreviewHeight, maxPreviewWidth,
maxPreviewHeight, largest);
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int i, int i1) {
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
return false;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
}
private Size chooseOptimalSize(Size[] choices, int textureViewWidth,
int textureViewHeight, int maxWidth, int maxHeight, Size aspectRatio) {
// Collect the supported resolutions that are at least as big as the preview Surface
List<Size> bigEnough = new ArrayList<>();
// Collect the supported resolutions that are smaller than the preview Surface
List<Size> notBigEnough = new ArrayList<>();
int w = aspectRatio.getWidth();
int h = aspectRatio.getHeight();
for (Size option : choices) {
if (option.getWidth() <= maxWidth && option.getHeight() <= maxHeight &&
option.getHeight() == option.getWidth() * 3 / 4) {
if (option.getWidth() >= textureViewWidth &&
option.getHeight() >= textureViewHeight) {
bigEnough.add(option);
} else {
notBigEnough.add(option);
}
}
}
// Pick the smallest of those big enough. If there is no one big enough, pick the
// largest of those not big enough.
if (bigEnough.size() > 0) {
return Collections.min(bigEnough, new CompareSizeByArea());
} else if (notBigEnough.size() > 0) {
return Collections.max(notBigEnough, new CompareSizeByArea());
} else {
Log.e(TAG, "Couldn't find any suitable preview size");
return choices[0];
}
}
};
// private View.OnTouchListener onTouchListener = new View.OnTouchListener() {
// @Override
// public boolean onTouch(View v, MotionEvent event) {
// switch (event.getAction()) {
// case MotionEvent.ACTION_DOWN:
// try {
// mCameraSession.setRepeatingRequest(initDngBuilder().build(), null, mHandler);
// } catch (CameraAccessException e) {
// Toast.makeText(getActivity(), "请求相机权限被拒绝", Toast.LENGTH_SHORT).show();
// }
// break;
// case MotionEvent.ACTION_UP:
// try {
// updateCameraPreviewSession();
// } catch (CameraAccessException e) {
// Toast.makeText(getActivity(), "请求相机权限被拒绝", Toast.LENGTH_SHORT).show();
// }
// break;
// }
// return true;
// }
// };
// private void updateCameraPreviewSession() throws CameraAccessException {
// mPreViewBuidler.set(CaptureRequest.CONTROL_AF_TRIGGER, CameraMetadata.CONTROL_AF_TRIGGER_CANCEL);
// mPreViewBuidler.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH);
// mCameraSession.setRepeatingRequest(mPreViewBuidler.build(), null, mHandler);
// }
// /**
// * 设置连拍参数
// *
// * @return
// */
// private CaptureRequest.Builder initDngBuilder() {
// CaptureRequest.Builder captureBuilder = null;
// try {
// captureBuilder = mCameraSession.getDevice().createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
//
// captureBuilder.addTarget(mImageReader.getSurface());
// captureBuilder.addTarget(surface);
// // Required for RAW capture
// captureBuilder.set(CaptureRequest.STATISTICS_LENS_SHADING_MAP_MODE, CaptureRequest.STATISTICS_LENS_SHADING_MAP_MODE_ON);
// captureBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_OFF);
// captureBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
// captureBuilder.set(CaptureRequest.SENSOR_EXPOSURE_TIME, (long) ((214735991 - 13231) / 2));
// captureBuilder.set(CaptureRequest.CONTROL_AE_EXPOSURE_COMPENSATION, 0);
//// captureBuilder.set(CaptureRequest.SENSOR_SENSITIVITY, (10000 - 100) / 2);//设置 ISO，感光度
// captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, 90);
// //设置每秒30帧
// CameraManager cameraManager = (CameraManager) getActivity().getSystemService(Context.CAMERA_SERVICE);
// String cameraid = CameraCharacteristics.LENS_FACING_FRONT + "";
// CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics(cameraid);
// Range<Integer> fps[] = cameraCharacteristics.get(CameraCharacteristics.CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES);
// captureBuilder.set(CaptureRequest.CONTROL_AE_TARGET_FPS_RANGE, fps[fps.length - 1]);
// } catch (CameraAccessException e) {
// Toast.makeText(getActivity(), "请求相机权限被拒绝", Toast.LENGTH_SHORT).show();
// } catch (NullPointerException e) {
// Toast.makeText(getActivity(), "打开相机失败", Toast.LENGTH_SHORT).show();
// }
// return captureBuilder;
// }
private View.OnClickListener picOnClickListener = new View.OnClickListener() {
@Override
public void onClick(View view) {
try {
shootSound();
Log.d(TAG, "正在拍照");
CaptureRequest.Builder builder = mCameraSession.getDevice().createCaptureRequest
(CameraDevice.TEMPLATE_STILL_CAPTURE);
builder.addTarget(mImageReader.getSurface());
// builder.set(CaptureRequest.SCALER_CROP_REGION, picRect);
// builder.set(CaptureRequest.CONTROL_AF_MODE,
// CaptureRequest.CONTROL_AF_MODE_EDOF);
// builder.set(CaptureRequest.SENSOR_SENSITIVITY, (10000 - 100) / 2);//设置 ISO，感光度
// builder.set(CaptureRequest.CONTROL_AF_TRIGGER,
// CameraMetadata.CONTROL_AF_TRIGGER_START);
// builder.set(CaptureRequest.JPEG_ORIENTATION, 90);
mCameraSession.capture(builder.build(), null, mHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
};
// private View.OnTouchListener textTureOntuchListener = new View.OnTouchListener() {
// //时时当前的zoom
// public double zoom;
// // 0<缩放比<mCameraCharacteristics.get(CameraCharacteristics
// // .SCALER_AVAILABLE_MAX_DIGITAL_ZOOM).intValue();
// //上次缩放前的zoom
// public double lastzoom;
// //两个手刚一起碰到手机屏幕的距离
// public double lenth;
// int count;
//
// @Override
// public boolean onTouch(View v, MotionEvent event) {
// switch (event.getAction() & MotionEvent.ACTION_MASK) {
// case MotionEvent.ACTION_DOWN:
// count = 1;
// break;
// case MotionEvent.ACTION_MOVE:
// if (count >= 2) {
// float x1 = event.getX(0);
// float y1 = event.getY(0);
// float x2 = event.getX(1);
// float y2 = event.getY(1);
// float x = x1 - x2;
// float y = y1 - y2;
// Double lenthRec = Math.sqrt(x * x + y * y) - lenth;
// Double viewLenth = Math.sqrt(v.getWidth() * v.getWidth() + v.getHeight()
// * v.getHeight());
// zoom = ((lenthRec / viewLenth) * maxRealRadio) + lastzoom;
// picRect.top = (int) (maxZoomrect.top / (zoom));
// picRect.left = (int) (maxZoomrect.left / (zoom));
// picRect.right = (int) (maxZoomrect.right / (zoom));
// picRect.bottom = (int) (maxZoomrect.bottom / (zoom));
// Message.obtain(mUIHandler, MOVE_FOCK).sendToTarget();
// }
// break;
// case MotionEvent.ACTION_UP:
// count = 0;
// break;
// case MotionEvent.ACTION_POINTER_DOWN:
// count++;
// if (count == 2) {
// float x1 = event.getX(0);
// float y1 = event.getY(0);
// float x2 = event.getX(1);
// float y2 = event.getY(1);
// float x = x1 - x2;
// float y = y1 - y2;
// lenth = Math.sqrt(x * x + y * y);
// }
// break;
// case MotionEvent.ACTION_POINTER_UP:
// count--;
// if (count < 2)
// lastzoom = zoom;
// break;
// }
// return true;
// }
// };
//
/**
* 播放系统的拍照的声音
*/
public void shootSound() {
ringtone.stop();
ringtone.play();
}
private class ImageSaver implements Runnable {
Image reader;
public ImageSaver(Image reader) {
this.reader = reader;
}
@Override
public void run() {
Log.d(TAG, "正在保存图片");
File dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)
.getAbsoluteFile();
if (!dir.exists()) {
dir.mkdirs();
}
File file = new File(dir, System.currentTimeMillis() + ".jpg");
FileOutputStream outputStream = null;
try {
outputStream = new FileOutputStream(file);
ByteBuffer buffer = reader.getPlanes()[0].getBuffer();
byte[] buff = new byte[buffer.remaining()];
buffer.get(buff);
BitmapFactory.Options ontain = new BitmapFactory.Options();
ontain.inSampleSize = 50;
Bitmap bm = BitmapFactory.decodeByteArray(buff, 0, buff.length, ontain);
Message.obtain(mUIHandler, SETIMAGE, bm).sendToTarget();
outputStream.write(buff);
Log.d(TAG, "保存图片完成");
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
reader.close();
}
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
private class InnerCallBack implements Handler.Callback {
@Override
public boolean handleMessage(Message message) {
switch (message.what) {
case SETIMAGE:
Bitmap bm = (Bitmap) message.obj;
mThumbnail.setImageBitmap(bm);
break;
case MOVE_FOCK:
mPreViewBuidler.set(CaptureRequest.SCALER_CROP_REGION, picRect);
try {
mCameraSession.setRepeatingRequest(mPreViewBuidler.build(), null,
mHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
break;
}
return false;
}
}
class CompareSizeByArea implements java.util.Comparator<Size> {
@Override
public int compare(Size lhs, Size rhs) {
// We cast here to ensure the multiplications won't overflow
return Long.signum((long) lhs.getWidth() * lhs.getHeight() -
(long) rhs.getWidth() * rhs.getHeight());
}
}
}
