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Ich arbeite an Kamera verwandte App. Ich habe erfolgreich die Aufnahme von Fotos und Fotos auch abgeschlossen. Aber ein Problem ist entstanden. Wenn ich ein Foto mache, ist die Fotoaufnahme erfolgreich, aber die Vorschau ist invers. Ich habe so viele Lösungen vom Stapelüberlauf ausprobiert, obwohl mir das Glück bisher nicht gefallen hat.Android Kamera Foto Vorschau kommt inverse
Meine Kamera Vorschau-Klasse ist:
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder mHolder;
private Camera mCamera;
private Context mContext;
public CameraPreview(Context context, Camera camera) {
super(context);
mContext = context;
mCamera = camera;
mHolder = getHolder();
mHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// create the surface and start camera preview
if (mCamera == null) {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
}
} catch (IOException e) {
Log.d(VIEW_LOG_TAG, "Error setting camera preview: " + e.getMessage());
}
}
public void refreshCamera(Camera camera) {
if (mHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
mCamera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
setCamera(camera);
// TODO: don't hardcode cameraId '0' here... figure this out later.
setCameraDisplayOrientation(mContext, Camera.CameraInfo.CAMERA_FACING_BACK, mCamera);
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e) {
Log.d(VIEW_LOG_TAG, "Error starting camera preview: " + e.getMessage());
}
}
public static void setCameraDisplayOrientation(Context context, int cameraId, Camera camera) {
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
int rotation = wm.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;
}
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(cameraId, info);
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
// Compensate for the mirror image.
result = (360 - result) % 360;
} else {
// Back-facing camera.
result = (info.orientation - degrees + 360) % 360;
}
camera.setDisplayOrientation(result);
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// If your preview can change or rotate, take care of those events here.
// Make sure to stop the preview before resizing or reformatting it.
refreshCamera(mCamera);
}
public void setCamera(Camera camera) {
//method to set a camera instance
mCamera = camera;
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
// mCamera.release();
}
}
und meine PhotoCaputeActivity Klasse ist unten:
public class PhotoCaptureActivity extends AppCompatActivity {
private static final String TAG = "PhotoCaptureActivity";
//Arraylist for image timer animation
int[] imageArray = {R.drawable.ic_five_128, R.drawable.ic_four_128,
R.drawable.ic_three_128, R.drawable.ic_two_128, R.drawable.ic_one_128,
R.drawable.ic_smiley_128
};
int i = 0;
private final static int DELAY = 1000;
private final Handler handler = new Handler();
Timer timer = new Timer();
Thread timerThread;
// Create variable to handle progress and set it to 0.
private int progress = 0;
Bitmap bitmap,photoCaptureBitmap;
private Camera mCamera;
private CameraPreview mPreview;
private PictureCallback mPicture;
private ImageButton capture, switchCamera;
private Context myContext;
private LinearLayout cameraPreview;
private boolean cameraFront = false;
private ImageView capturedImageHolder;
private ProgressBar progressBar_take_photo;
ImageButton next_button_take_photo;
ImageButton back_button_take_photo;
TextView photo_title_text;
ImageView image_animation;
private MyPreferences myPreferences;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getSupportActionBar().setDisplayShowTitleEnabled(false);
setContentView(R.layout.photo_capture_activity);
//setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
Logger.addLogAdapter(new AndroidLogAdapter());
myContext = this;
initialize();
myPreferences = MyPreferences.getPreferences(this);
nextButton();
backButton();
progressBar();
nameTextShow();
}
private int findFrontFacingCamera() {
int cameraId = -1;
// Search for the front facing camera
int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
cameraId = i;
cameraFront = true;
break;
}
}
return cameraId;
}
private int findBackFacingCamera() {
int cameraId = -1;
//Search for the back facing camera
//get the number of cameras
int numberOfCameras = Camera.getNumberOfCameras();
//for every camera check
for (int i = 0; i < numberOfCameras; i++) {
CameraInfo info = new CameraInfo();
Camera.getCameraInfo(i, info);
if (info.facing == CameraInfo.CAMERA_FACING_BACK) {
cameraId = i;
cameraFront = false;
break;
}
}
return cameraId;
}
public void onResume() {
super.onResume();
if (!hasCamera(myContext)) {
Toast toast = Toast.makeText(myContext, "Sorry, your phone does not have a camera!", Toast.LENGTH_LONG);
toast.show();
finish();
}
if (mCamera == null) {
//if the front facing camera does not exist
if (findFrontFacingCamera() < 0) {
//Toast.makeText(this, "", Toast.LENGTH_LONG).show();
//switchCamera.setVisibility(View.GONE);
}
mCamera = Camera.open(findFrontFacingCamera());
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}else{
//Visibility
cameraPreview.setVisibility(View.GONE);
capturedImageHolder.setVisibility(View.VISIBLE);
String photoCapturePreview = myPreferences.getVisitorPhoto();
if(!photoCapturePreview.equals("")) {
photoCaptureBitmap = decodeToBase64(photoCapturePreview);
}
capturedImageHolder.setImageBitmap(photoCaptureBitmap);
}
}
public static Bitmap decodeToBase64(String input) {
byte[] decodedByte = Base64.decode(input, 0);
return BitmapFactory.decodeByteArray(decodedByte, 0, decodedByte.length);
}
// Code for initialization
public void initialize() {
cameraPreview = (LinearLayout) findViewById(R.id.cameraFrame);
mPreview = new CameraPreview(myContext, mCamera);
cameraPreview.addView(mPreview);
capture = (ImageButton) findViewById(R.id.button_capture);
capture.setOnClickListener(captrureListener);
//switchCamera = (Button) findViewById(R.id.button_ChangeCamera);
//switchCamera.setOnClickListener(switchCameraListener);
image_animation = (ImageView) findViewById(R.id.timer_text);
capturedImageHolder = (ImageView) findViewById(R.id.captured_image);
next_button_take_photo = (ImageButton) findViewById(R.id.next_button_take_photo);
back_button_take_photo = (ImageButton) findViewById(R.id.back_button_take_photo);
progressBar_take_photo = (ProgressBar) findViewById(R.id.progressBar_take_photo);
photo_title_text = (TextView) findViewById(R.id.photo_title_text);
}
//Next Button operation based on mobile number input
private void nextButton() {
next_button_take_photo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
hideKeyboard();
if (bitmap != null) {
Intent newIntent = new Intent(getApplicationContext(), ConfirmationActivity.class);
startActivity(newIntent);
}
}
});
}
//Back button operation
private void backButton() {
back_button_take_photo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent newIntent = new Intent(getApplicationContext(), AddressInputActivity.class);
startActivity(newIntent);
}
});
}
//Progress bar operation
private void progressBar() {
//simpleProgressBar.setMax(100); // 100 maximum value for the progress value
//simpleProgressBar.setProgress(50); // 50 default progress value for the progress bar
// Get the Drawable custom_progressbar
//Drawable draw=res.getDrawable(R.drawable.custom_progressbar);
// set the drawable as progress drawable
//progressBar.setProgressDrawable(draw);
}
//Normal text show
private void nameTextShow() {
String vsitorName = myPreferences.getVisitorName();
photo_title_text.setText(vsitorName + ", please smile for the Camera");
}
OnClickListener switchCameraListener = new OnClickListener() {
@Override
public void onClick(View v) {
//get the number of cameras
int camerasNumber = Camera.getNumberOfCameras();
if (camerasNumber > 1) {
//release the old camera instance
//switch camera, from the front and the back and vice versa
releaseCamera();
chooseCamera();
} else {
Toast toast = Toast.makeText(myContext, "Sorry, your phone has only one camera!", Toast.LENGTH_LONG);
toast.show();
}
}
};
public void chooseCamera() {
//if the camera preview is the front
if (cameraFront) {
int cameraId = findBackFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
} else {
int cameraId = findFrontFacingCamera();
if (cameraId >= 0) {
//open the backFacingCamera
//set a picture callback
//refresh the preview
mCamera = Camera.open(cameraId);
mPicture = getPictureCallback();
mPreview.refreshCamera(mCamera);
}
}
}
@Override
protected void onPause() {
super.onPause();
//when on Pause, release camera in order to be used from other applications
releaseCamera();
}
private boolean hasCamera(Context context) {
//check if the device has camera
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY)) {
return true;
} else {
return false;
}
}
private PictureCallback getPictureCallback() {
PictureCallback picture = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
if (data != null) {
//make a new picture file
File pictureFile = getOutputMediaFile();
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
String imageEncoded = Base64.encodeToString(data, Base64.DEFAULT);
myPreferences.setVisitorPhoto(imageEncoded);
if (bitmap == null) {
return;
}
try {
//write the file
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
//Toast toast = Toast.makeText(myContext, "Picture saved: " + pictureFile.getName(), Toast.LENGTH_LONG);
//toast.show();
//Method for image view
captureImageView();
} catch (FileNotFoundException e) {
} catch (IOException e) {
}
//refresh camera to continue preview
mPreview.refreshCamera(mCamera);
}
}
};
return picture;
}
**private void captureImageView(){
//Visibitlity of camera photo
cameraPreview.setVisibility(View.GONE);
capturedImageHolder.setVisibility(View.VISIBLE);
int screenWidth = getResources().getDisplayMetrics().widthPixels;
int screenHeight = getResources().getDisplayMetrics().heightPixels;
Camera.CameraInfo info = new Camera.CameraInfo();
Matrix mtx = new Matrix();
if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
// Notice that width and height are reversed
Bitmap scaled = Bitmap.createScaledBitmap(bitmap, screenHeight, screenWidth, true);
int w = scaled.getWidth();
int h = scaled.getHeight();
// Perform matrix rotations/mirrors depending on camera that took the photo
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT)
{
float[] mirrorY = { -1, 0, 0, 0, 1, 0, 0, 0, 1};
Matrix matrixMirrorY = new Matrix();
matrixMirrorY.setValues(mirrorY);
mtx.postConcat(matrixMirrorY);
}
// Setting post rotate to 90
mtx.postRotate(270);
// Rotating Bitmap
bitmap = Bitmap.createBitmap(scaled, 0, 0, w, h, mtx, true);
//capturedImageHolder.setImageBitmap(bitmap);
capturedImageHolder.setImageBitmap(scaleDownBitmapImage(bitmap, 350, 450));
}else{// LANDSCAPE MODE
//No need to reverse width and height
Bitmap scaled = Bitmap.createScaledBitmap(bitmap, screenWidth,screenHeight , true);
bitmap=scaled;
//capturedImageHolder.setImageBitmap(bitmap);
capturedImageHolder.setImageBitmap(scaleDownBitmapImage(bitmap, 650, 300));
}
}**
private Bitmap scaleDownBitmapImage(Bitmap bitmap, int newWidth, int newHeight) {
Bitmap resizedBitmap = Bitmap.createScaledBitmap(bitmap, newWidth, newHeight, true);
return resizedBitmap;
}
OnClickListener captrureListener = new OnClickListener() {
@Override
public void onClick(View v) {
//Visibitlity of camera photo
cameraPreview.setVisibility(View.VISIBLE);
capturedImageHolder.setVisibility(View.GONE);
new Loading().execute();
//timer.schedule(task, DELAY, DELAY);
timerThread = new Thread()
{
public void run() {
for (i = 0; i < 6; i++) {
runOnUiThread(new Runnable() {
public void run() {
image_animation.setImageResource(imageArray[i]);
}
});
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
if(i==6){
timerThread.interrupt();
}
}
}
};
timerThread.start();
}
};
private final TimerTask task = new TimerTask() {
private int counter = 0;
public void run() {
handler.post(new Runnable() {
public void run() {
image_animation.setImageResource(imageArray[i]);
i++;
if (i > imageArray.length - 1) {
i = 0;
}
}
});
if (++counter == 6) {
timer.cancel();
timer.purge();
}
}
};
public class Loading extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... voids) {
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
// 6000ms=6s at intervals of 1000ms=1s so that means it lasts 5 seconds
new CountDownTimer(5000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
// every time 1 second passes
//tv.setText("" + millisUntilFinished/1000);
/* image_animation.setImageResource(imageArray[i]);
i++;
if (i > imageArray.length - 1) {
i = 0;
}*/
}
@Override
public void onFinish() {
// count finished
//tv.setText("Picture Taken");
mCamera.takePicture(null, null, null, mPicture);
}
}.start();
}
}
//make picture and save to a folder
private static File getOutputMediaFile() {
//make a new file directory inside the "sdcard" folder
File mediaStorageDir = new File("/sdcard/", "JCG Camera");
//if this "JCGCamera folder does not exist
if (!mediaStorageDir.exists()) {
//if you cannot make this folder return
if (!mediaStorageDir.mkdirs()) {
return null;
}
}
//take the current timeStamp
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
//and make a media file:
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");
return mediaFile;
}
private void releaseCamera() {
// stop and release camera
if (mCamera != null) {
mCamera.release();
mCamera = null;
}
}
private void hideKeyboard() {
View view = getCurrentFocus();
if (view != null) {
((InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE)).
hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
}
}
@Override
public void onBackPressed()
{
// code here to show dialog
super.onBackPressed(); // optional depending on your needs
}
@Override
protected void onDestroy() {
if (mCamera != null) {
mCamera.release();
}
super.onDestroy();
}
@Override
public void onStop() {
if (mCamera != null) {
mCamera.release();
}
super.onStop();
}
}
Was ist das Ergebnis, das ich jetzt bin immer und was ich will, dass unten. Bitte sehen Sie während der Fotoaufnahme die Hand auf der rechten Seite, aber wenn die Fotovorschau angezeigt wird, wird sie auf der linken Seite angezeigt.
Also, was kann getan werden, um das Problem zu lösen?
dies nur mit Frontkamera oder zurück Kamera passieren ....? – Omi
@Omi dies ist nur für die Frontkamera, da ich jetzt nur die Frontkamera verwende –
Spiegelanzeige, wenn die Frontkamera-Vorschau beabsichtigt und Standard ist. Ihre Benutzer können überrascht oder sogar verärgert sein, diese Funktion nicht zu haben, die für sie natürlich aussieht (siehe https://stackoverflow.com/questions/47497345). Es wird weithin erwartet, dass Bilder oder Videos ohne Spiegelung aufgenommen wurden, als ob sie von einer anderen Person aufgenommen würden, die Sie ansieht. Einige Apps, wie Snapchat, liefern zusätzliche Mikrofone, um Standbilder und aufgezeichnete Videos im Spiegelmodus zu erstellen. Soweit ich das beurteilen kann, akzeptieren die meisten Benutzer dies, aber für einige ist es frustrierend (siehe https://stackoverflow.com/a/47249032/192373). –