Question

我正在开发的自定义相机应用程序将图像旋转90度，我的相机的屏幕视图失真并逆时针旋转90度，但是当它保存图像时，就好像我已经拍摄当我拿着它的肖像时，我的手机向左90度的照片，需要风景照片。这是相机活动的代码，如何旋转相机的屏幕视图？

package fr.altimer.lost.collect.client;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.Size;
import android.location.Location;
import android.os.Bundle;
import android.os.Environment;
import android.os.IBinder;
import android.view.KeyEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;
import android.widget.Toast;
import fr.altimer.lost.collect.client.model.Data;
import fr.altimer.lost.collect.client.model.Image;
import fr.altimer.lost.collect.client.preferences.Configuration;
import fr.altimer.lost.collect.client.services.SearchService;
import fr.altimer.lost.collect.client.services.ServiceSensor;

public class CameraActivity extends Activity implements SurfaceHolder.Callback, Camera.PictureCallback {

private Camera camera;
private SurfaceView surfaceCamera;
private Boolean isPreview;
private ServiceSensor mService;
private boolean mBound;

private int routeGiven = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // On met l'application en plein écran et sans barre de titre
    getWindow().setFormat(PixelFormat.TRANSLUCENT);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

    isPreview = false;

    // On applique notre layout
    setContentView(R.layout.camera);

    // On récupère notre surface pour le preview
    surfaceCamera = (SurfaceView) findViewById(R.id.surfaceViewCamera);

    // Bouton pour prendre la photo
    ImageButton picture = (ImageButton) findViewById(R.id.photo);
    picture.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            takepicture();
        }
    });

    // Bouton retour
    ImageButton back = (ImageButton) findViewById(R.id.TableLayout02);
    back.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            finish();
        }
    });

    // Méthode d'initialisation de la caméra
    InitializeCamera();

    if (savedInstanceState != null) {
        routeGiven = savedInstanceState.getInt("routeGiven", 0);
    }
}

public void InitializeCamera() {
    // On attache nos retour du holder à  notre activite
    surfaceCamera.getHolder().addCallback(this);
    surfaceCamera.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    // Si le mode preview est lancé alors on le stop
    if (isPreview) {
        camera.stopPreview();
    }
    // On récupère les parametres de la camera
    Camera.Parameters parameters = camera.getParameters();

    List<Size> sizes = parameters.getSupportedPreviewSizes();
    Size previewSize = getOptimalPreviewSize(sizes, width, height);
    // On change la taille
    parameters.setPreviewSize(previewSize.width, previewSize.height);

    // On applique nos nouveaux parametres
    camera.setParameters(parameters);

    try {
        // On attache notre previsualisation de la camera au holder de la
        // surface
        camera.setPreviewDisplay(surfaceCamera.getHolder());
    } catch (IOException e) {
    }

    // On lance la previeuw
    camera.startPreview();

    isPreview = true;
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
    // On prend le controle de la camera
    if (camera == null)
        camera = Camera.open();
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    // On arrête la camera et on rend la main
    if (camera != null) {
        camera.stopPreview();
        isPreview = false;
        camera.release();
    }
}

@Override
public void onPictureTaken(byte[] data, Camera camera) {
    int routeid = 0;

    // récupération de l'id du parcours
    if (mBound && mService != null) {
        routeid = mService.getIdCurrent();
    } else {
        routeid = routeGiven;
    }

    // Création et sauvegarde la photo
    String pictureName = getFileName(routeid);

    if (pictureName != null) {
        File pictureFile = new File(pictureName);
        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream(pictureFile);
            fos.write(data);
            fos.flush();
            Toast.makeText(getBaseContext(), "New Image saved", Toast.LENGTH_LONG).show();

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                fos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        // Enregistrement du path de l'image dans la bdd
        if (mBound && mService != null) {
            Location loc = mService.getLastLocation();
            Data image;
            if (loc == null)
                image = new Image(pictureName, null, null);
            else
                image = new Image(pictureName, loc.getLatitude(), loc.getLongitude());
            mService.saveData(image);
        } else {
            Intent intent = new Intent();
            intent.putExtra("path", pictureName);
            setResult(RESULT_OK, intent);
        }
    } else {
        Toast.makeText(this, "Can't create directory to save image.", Toast.LENGTH_LONG).show();
    }
    finish();
}

/**
 * Récupération du chemin de la carte SD
 * @return
 */
private File getDir() {
    String status = Environment.getExternalStorageState();
    try {
        if (status.equals(Environment.MEDIA_MOUNTED)) {
            return Environment.getExternalStorageDirectory();
        }
    } catch (IllegalArgumentException e) {
        status = Environment.MEDIA_REMOVED;
    }
    return null;
}

/**
 * Création et récupération du nom du fichier jpg
 * @param routeid
 * @return
 */
private String getFileName(int routeid) {
    SimpleDateFormat dateFormat1 = new SimpleDateFormat("ddMMyy-HHmmss");
    String dateString = dateFormat1.format(new Date());
    File fileDir = getDir();
    if (fileDir != null) {
        File filePath = new File(fileDir.getAbsolutePath() + Configuration.LOST_FOLDER);
        if (!filePath.exists())
            filePath.mkdir();
        return filePath.getPath() + File.separator + "Picture_" + dateString + "_id_" + routeid + ".jpg";
    } else {
        return null;
    }
}

private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
    final double ASPECT_TOLERANCE = 0.1;
    double targetRatio = (double) w / h;
    if (sizes == null)
        return null;

    Size optimalSize = null;
    double minDiff = Double.MAX_VALUE;

    int targetHeight = h;

    // Try to find an size match aspect ratio and size
    for (Size size : sizes) {
        double ratio = (double) size.width / size.height;
        if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE)
            continue;
        if (Math.abs(size.height - targetHeight) < minDiff) {
            optimalSize = size;
            minDiff = Math.abs(size.height - targetHeight);
        }
    }

    // Cannot find the one match the aspect ratio, ignore the requirement
    if (optimalSize == null) {
        minDiff = Double.MAX_VALUE;
        for (Size size : sizes) {
            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }
    }
    return optimalSize;
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (KeyEvent.KEYCODE_CAMERA == keyCode /* && event.isLongPress() */) {
        takepicture();
        return true;
    }
    if (KeyEvent.KEYCODE_BACK == keyCode) {
        finish();
        return true;
    }
    return false;
}

private void takepicture() {
    camera.takePicture(null, null, this);
}

private ServiceConnection mConnection = new ServiceConnection() {

    @Override
    public void onServiceConnected(ComponentName className, IBinder service) {
        // We've bound to LocalService, cast the IBinder and get LocalService instance
        mService = ((ServiceSensor.LocalBinder) service).getService();
        mService.setHandler(null);

        mBound = true;
    }

    @Override
    public void onServiceDisconnected(ComponentName arg0) {
        mBound = false;
    }
};

@Override
protected void onStart() {
    super.onStart();
    Intent intent = new Intent(this, ServiceSensor.class);
    if (SearchService.Search(this, "ServiceSensor")) {
        bindService(intent, mConnection, Context.BIND_NOT_FOREGROUND);
    }
}

@Override
protected void onStop() {
    super.onStop();
    if (mBound) {
        unbindService(mConnection);
        mBound = false;
    }
}
}

（因为我和一位法国同事一起工作，所以评论偶尔会有法语，尽管我不会说法语。）

Answer 1

这是我对surfaceCreated SurfaceHolder.Callback方法的实现，它运行正常，请检查您是否遗漏了实施中的任何内容

public void surfaceCreated(SurfaceHolder holder) {
        // The Surface has been created, acquire the camera and tell it where
        // to draw.
        try {
            Log.d(TAG, "surfaceCreated(), holder"+holder.toString());
            mCamera = null;
            mCamera = Camera.open();
            Log.d(TAG, "surfaceCreated(), mCamera="+mCamera);
            mCamera.setDisplayOrientation(90);
            mCamera.setPreviewDisplay(holder);
            Camera.Parameters params= mCamera.getParameters();
            params.set("jpeg-quality", 72);
            params.set("rotation", 90);
            params.set("orientation", "portrait");
            params.setPictureFormat(PixelFormat.JPEG);
                    mCamera.setParameters(params);
            createZoomlayout();

        } catch (Exception e) {
            Toast.makeText(CameraInterface.this,
                    " surfaceCreated " + e.getMessage(), Toast.LENGTH_LONG)
                    .show();
            e.printStackTrace();
        }
    }

Answer 2

试试这个代码段

camera.setDisplayOrientation(90)

Answer 3

清单文件中的

在您的活动中添加以下行：机器人：screenOrientation = “风景”

相机应用程序将图像旋转90度

3 个答案: