Android 使用camera类捕获图像
我想使用camera类捕获图像,然后将其显示在曲面视图中。最初,我有一个问题,相机在横向视图中运行,所以我添加了一个方法来设置相机的方向。现在相机工作正常,但拍摄的图像是旋转的 下面是我的代码Android 使用camera类捕获图像,android,camera,android-camera,Android,Camera,Android Camera,我想使用camera类捕获图像,然后将其显示在曲面视图中。最初,我有一个问题,相机在横向视图中运行,所以我添加了一个方法来设置相机的方向。现在相机工作正常,但拍摄的图像是旋转的 下面是我的代码 public class MainActivity extends AppCompatActivity { private ImageView imageResult; private CameraPreview cameraView; private FrameLayout f
public class MainActivity extends AppCompatActivity {
private ImageView imageResult;
private CameraPreview cameraView;
private FrameLayout frameNew;
private Button snapPhoto;
boolean takePicture = false;
private Bitmap image = null;
private static final String TAG = "MyActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setupCamera();
}
public void setupCamera() {
cameraView = new CameraPreview(getApplicationContext(), this);
imageResult = new ImageView(getApplicationContext());
imageResult.setBackgroundColor(Color.GRAY);
frameNew = (FrameLayout) findViewById(R.id.frame);
snapPhoto = (Button) findViewById(R.id.capture);
frameNew.addView(imageResult);
frameNew.addView(cameraView);
frameNew.bringChildToFront(imageResult);
}
public void captureHandler(View view) {
if (takePicture) {
cameraView.capture(jpegHandler);
} else {
takePicture = true;
frameNew.bringChildToFront(cameraView);
imageResult.setImageBitmap(null);
snapPhoto.setText("Capture");
}
}
public Camera.PictureCallback jpegHandler = new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
image = BitmapFactory.decodeByteArray(data, 0, data.length);
imageResult.setImageBitmap(image);
frameNew.bringChildToFront(imageResult);
snapPhoto.setText("take a picture");
takePicture = false;
File pictureFile = getOuputMediaFile();
if (pictureFile == null) {
Log.d(TAG, "Error creating media file ");
return;
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
};
public File getOuputMediaFile() {
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "Divyeshs");
if (!mediaStorageDir.exists()) {
Log.d("Divyeshs", "failed to create directory");
return null;
}
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");
return mediaFile;
}
}
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback2 {
private SurfaceHolder mHolder;
public Camera camera = null;
Activity activity;
int camid;
public CameraPreview(Context context, Activity activity) {
super(context);
this.activity = activity;
mHolder = getHolder();
mHolder.addCallback(this);
}
@Override
public void surfaceRedrawNeeded(SurfaceHolder holder) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
int camCount;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
camCount = Camera.getNumberOfCameras();
for (int i = 0; i < camCount; i++) {
Camera.getCameraInfo(i, cameraInfo);
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
try {
camera = Camera.open(i);
camid = i;
} catch (Exception e) {
e.printStackTrace();
}
}
}
try {
camera.setPreviewDisplay(mHolder);
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
camera.startPreview();
CameraPreview.setCameraDisplayOrientation(activity, camid, camera);
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
camera.stopPreview();
camera = null;
}
public void capture(Camera.PictureCallback jpegHandler) {
camera.takePicture(null, null, jpegHandler);
}
public static void setCameraDisplayOrientation(Activity activity, int cameraId, android.hardware.Camera camera) {
Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
android.hardware.Camera.getCameraInfo(cameraId, info);
int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break;
case Surface.ROTATION_90:
degrees = 90;
break;
case Surface.ROTATION_180:
degrees = 180;
break;
case Surface.ROTATION_270:
degrees = 270;
break;
}
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
camera.setDisplayOrientation(result);
}
}
public类MainActivity扩展了AppCompatActivity{
私有图像查看图像结果;
私人摄像师;
私有框架布局框架新建;
私人按钮快照;
布尔takePicture=false;
私有位图图像=空;
私有静态最终字符串TAG=“MyActivity”;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
设置摄像头();
}
公共摄像机(){
cameraView=新的CameraPreview(getApplicationContext(),this);
imageResult=新的ImageView(getApplicationContext());
imageResult.setBackgroundColor(颜色:灰色);
frameNew=(FrameLayout)findviewbyd(R.id.frame);
snapPhoto=(按钮)findViewById(R.id.capture);
frameNew.addView(imageResult);
frameNew.addView(cameraView);
frameNew.bringChildToFront(imageResult);
}
公共无效captureHandler(视图){
如果(拍照){
cameraView.capture(JPEG处理程序);
}否则{
拍摄照片=真实;
frameNew.bringChildToFront(cameraView);
imageResult.setImageBitmap(空);
snapPhoto.setText(“捕获”);
}
}
public Camera.PictureCallback jpegHandler=新建Camera.PictureCallback(){
@凌驾
公共void onPictureTaken(字节[]数据,摄像头){
image=BitmapFactory.decodeByteArray(数据,0,数据.长度);
设置图像位图(图像);
frameNew.bringChildToFront(imageResult);
snapPhoto.setText(“拍照”);
拍照=假;
File pictureFile=getOutMediaFile();
如果(pictureFile==null){
Log.d(标记“创建媒体文件时出错”);
返回;
}
试一试{
FileOutputStream fos=新的FileOutputStream(pictureFile);
写入(数据);
fos.close();
}catch(filenotfounde异常){
e、 printStackTrace();
}捕获(IOE异常){
e、 printStackTrace();
}
}
};
公共文件getOutMediaFile(){
File mediaStorageDir=新文件(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),“Divyeshs”);
如果(!mediaStorageDir.exists()){
Log.d(“Divyeshs”,“创建目录失败”);
返回null;
}
字符串时间戳=新的SimpleDateFormat(“yyyyMMdd_HHmmss”)。格式(新日期();
File mediaFile=new File(mediaStorageDir.getPath()+File.separator+“IMG_”+timeStamp+”.jpg”);
返回媒体文件;
}
}
公共类CameraPreview扩展了SurfaceView实现了SurfaceHolder.Callback2{
私人地勤人员;
公共摄像机=空;
活动;
int camid;
公共CameraPreview(上下文、活动){
超级(上下文);
这个。活动=活动;
mHolder=getHolder();
mHolder.addCallback(this);
}
@凌驾
需要使用公共空隙表面浮雕(表面浮雕支架){
}
@凌驾
已创建的公共空白表面(表面持有人){
int camCount;
Camera.CameraInfo CameraInfo=新的Camera.CameraInfo();
camCount=Camera.getNumberOfCameras();
对于(int i=0;i
你真的希望有人会