相机的表面视图在 android 棒棒糖 os 中不起作用

Question

今天我在 android surfaceview for camera customization 中遇到了一个问题。我试过下面的代码。

The Issue occurred when I captured the image, it stops the camera preview and doesn't return to the activity.

程序中将实现以下代码。我从 Whosebug

上的现有参考中获取了这段代码

支持Class.

public class AndroidCameraSurfaceview extends Activity implements
    SurfaceHolder.Callback {
TextView testView;

Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
boolean preview;

PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
int displayheight, displaywidth;
Camera.PreviewCallback previewCallback;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.camerasurfaceview);

    getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
    surfaceHolder = surfaceView.getHolder();

    surfaceHolder.addCallback(this);

    surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    jpegCallback = new PictureCallback() {
        public void onPictureTaken(byte[] data, Camera camera) {
            Bundle b = new Bundle();
            b.putByteArray("Image", data);
            Intent intent = new Intent();
            intent.putExtras(b);
            setResult(RESULT_OK, intent);
            finish();
            // refreshCamera();
        }
    };
}



public void captureImage(View v) throws IOException {
            // take the picture
            camera.takePicture(null, null, jpegCallback);
        }

    public void refreshCamera() {
        if (surfaceHolder.getSurface() == null) {
            // preview surface does not exist
            return;
        }

        try {
            camera.stopPreview();
        } catch (Exception e) {
        }

        try {
            camera.setDisplayOrientation(90);
            camera.setPreviewDisplay(surfaceHolder);
            camera.startPreview();
        } catch (Exception e) {

        }
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        if (preview) {
            camera.stopPreview();
        }
try{
        Camera.Parameters parameters = camera.getParameters();
        List<Size> sizes = parameters.getSupportedPreviewSizes();
        Size optimalSize = getOptimalPreviewSize(sizes, width, height);
        parameters.setPreviewSize(optimalSize.width, optimalSize.height);
        camera.setParameters(parameters);
        try {
            camera.setDisplayOrientation(90);
            camera.setPreviewDisplay(holder);
            camera.startPreview();
            preview = true;
        } catch (IOException e) {
            e.printStackTrace();
        }
}catch(Exception e){
    System.out.println("Surface Exception---=>"+e);
}
    }

    public void surfaceCreated(SurfaceHolder holder) {
        camera = Camera.open();
        if (camera != null) {
            Camera.Parameters params = camera.getParameters();
            camera.setDisplayOrientation(90);
            camera.setParameters(params);

        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        // stop preview and release camera
        camera.stopPreview();
        camera.release();
        camera = null;
    }

    private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
        final double ASPECT_TOLERANCE = 1;
        double targetRatio = (double) w / h;
        if (sizes == null)
            return null;
        Size optimalSize = null;
        double minDiff = Double.MAX_VALUE;
        int targetHeight = h;
        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);
            }
        }

        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;
    }

    }

2.Implemented 在 Activity

public void captureImage() {

    Intent intentDriver = new Intent(AddNewDevice_Activity.this,
            AndroidCameraSurfaceview.class);
    startActivityForResult(intentDriver, 0);
    //
    // Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    //
    // Uri fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
    //
    // intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
    //
    // // start the image capture Intent
    // startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);

    // Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    //
    // fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
    //
    // intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
    //
    // // start the image capture Intent
    // startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);

}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == 0) {

        System.out.println("Result Code: " + resultCode);
        if (resultCode == RESULT_OK && data != null) {

            Bundle bundle = data.getExtras();
            byte[] test = bundle.getByteArray("Image");
            Bitmap bpCamera = BitmapFactory.decodeByteArray(test, 0,
                    test.length);
            Matrix matrix = new Matrix();
            matrix.postRotate(90);
            bpCamera = Bitmap
                    .createBitmap(bpCamera, 0, 0, bpCamera.getWidth(),
                            bpCamera.getHeight(), matrix, true);

            imageView_camera.setImageBitmap(bpCamera);
            selectedImageStr = encodeTobase64(bpCamera);
        }

    } else {
        finish();
    }

}

Answer 1

你应该拆分 activity 和表面视图。

public class AndroidCameraActivity extends Activity {
    AndroidCameraSurfaceview surfaceView;
    ...
    @Override
    public void onCreate(Bundle savedInstanceState) {
        ...
        surfaceView = (AndroidCameraSurfaceview) findViewById(R.id.surfaceView);
    }
}

class AndroidCameraSurfaceview extends SurfaceView implements SurfaceHolder.Callback {
    public AndroidCameraSurfaceview(Context context, AttributeSet attrs) {
        super(context, attrs);
        getHolder().addCallback(this);
        ...
    }

    public void surfaceCreated(SurfaceHolder holder) {
        ...
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        ...
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        ...
    }
}

Answer 2

Google 从 API 版本 21 中修改了相机 API，今后我们必须采用新的 camera2 包，并且在相机功能出现的情况下必须遵守.这是 link 由 google 发布的示例代码，它使用表面视图实现并且在 Android 5.0 中完美运行。我相信它解决了一些谜团。

https://github.com/googlesamples/android-Camera2Basic

Answer 3

try this, I have made it from my self : 

package com.fragments;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.Date;
import java.text.SimpleDateFormat;

import com.jsonparsing.JsonMainActivity;
import com.jsonparsing.MailFragment;
import com.mobehc.R;
import com.sendmail.main;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.hardware.Camera;
import android.hardware.Camera.CameraInfo;
import android.hardware.Camera.PictureCallback;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.Environment;
import android.os.Handler;
import android.os.SystemClock;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class CamImageCapture2 extends Fragment implements
        MediaRecorder.OnInfoListener {

    private Camera myCamera;
    private MyCameraSurfaceView myCameraSurfaceView;
    private MediaRecorder mediaRecorder;
    Camera c = null;
    ImageView myButton, myButton1, backcam;
    SurfaceHolder surfaceHolder;
    boolean recording;
    private Button startButton;
    private Button pauseButton;

    private TextView timerValue;

    private long startTime = 0L;

    private Handler customHandler = new Handler();

    long timeInMilliseconds = 0L;
    long timeSwapBuff = 0L;
    long updatedTime = 0L;
    String path = Environment.getExternalStorageDirectory().toString()
            + "/00 MHC/VID.MP4";

    /** Called when the activity is first created. */
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.activity_captureimage, container,
                false);

        recording = false;

        getActivity().getWindow().addFlags(
                WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        timerValue = (TextView) v.findViewById(R.id.timer);
        // Get Camera for preview
        myCamera = getCameraInstance();
        if (myCamera == null) {
            Toast.makeText(getActivity(), "Fail to get Camera",
                    Toast.LENGTH_LONG).show();
        }

        myCameraSurfaceView = new MyCameraSurfaceView(getActivity(), myCamera);
        FrameLayout myCameraPreview = (FrameLayout) v
                .findViewById(R.id.videoview);
        myCameraPreview.addView(myCameraSurfaceView);

        myButton = (ImageView) v.findViewById(R.id.rec);
        myButton1 = (ImageView) v.findViewById(R.id.rec1);
        backcam = (ImageView) v.findViewById(R.id.backcamera);
        backcam.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                Intent ik = new Intent(getActivity(), Camrec2.class);
                startActivity(ik);
                // getActivity().finish();
                getActivity().getFragmentManager().popBackStack();
            }
        });
        myButton1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                myCamera.takePicture(null, null, mPicture);
            }
        });

        myButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                File attachment1 = new File(Environment
                        .getExternalStorageDirectory(), "/00 MHC/image.jpg");
                if (attachment1.exists()) {
                    attachment1.delete();
                }

                if (recording) {
                    mediaRecorder.stop(); // stop the recording
                    releaseMediaRecorder(); // release the MediaRecorder object

                    // Exit after saved
                    getActivity().finish();
                } else {

                    // Release Camera before MediaRecorder start
                    releaseCamera();

                    if (!prepareMediaRecorder()) {
                        Toast.makeText(getActivity(),
                                "Fail in prepareMediaRecorder()!\n - Ended -",
                                Toast.LENGTH_LONG).show();
                        getActivity().finish();
                    }

                    mediaRecorder.start();
                    startTime = SystemClock.uptimeMillis();
                    customHandler.postDelayed(updateTimerThread, 0);

                    /*
                     * final TextView _tv = (TextView) findViewById(R.id.timer);
                     * _tv.setVisibility(View.VISIBLE); new
                     * CountDownTimer(60000, 1000) {
                     * 
                     * public void onTick(long millisUntilFinished) {
                     * _tv.setText(new SimpleDateFormat("00:ss") .format(new
                     * Date(millisUntilFinished))); }
                     * 
                     * public void onFinish() { _tv.setText("done!"); Intent ii
                     * = new Intent(Camrecord.this, Emailtry.class);
                     * startActivity(ii); finish(); } }.start();
                     */recording = true;
                    // myButton.setText("STOP");

                    Drawable myDrawable = getResources().getDrawable(
                            R.drawable.stp);
                    myButton.setImageDrawable(myDrawable);
                    backcam.setVisibility(View.INVISIBLE);

                }

            }
        });
        return v;
    }

    PictureCallback mPicture = new PictureCallback() {
        @Override
        public void onPictureTaken(byte[] data, Camera camera) {
            File externalStorage = Environment.getExternalStorageDirectory();

            String sdcardPath = externalStorage.getAbsolutePath() + "/00 MHC/";
            File pictureFile = new File(sdcardPath + "/image" + ".jpg");

            try {
                FileOutputStream fos = new FileOutputStream(pictureFile);
                fos.write(data);
                fos.close();

                File attachment1 = new File(
                        Environment.getExternalStorageDirectory(),
                        "/00 MHC/VID.mp4");
                if (attachment1.exists()) {
                    attachment1.delete();
                }
                Toast.makeText(getActivity(), "Captured Successfully...",
                        Toast.LENGTH_LONG).show();
                Fragment fr = new main();
                android.support.v4.app.FragmentTransaction fragmentTransaction = getFragmentManager()
                        .beginTransaction();
                fragmentTransaction.replace(R.id.fragment_place, fr);
                fragmentTransaction.commit();
                // getActivity().finish();
            } catch (FileNotFoundException e) {

            } catch (IOException e) {
            }
        }
    };

    private Camera getCameraInstance() {
        // TODO Auto-generated method stub

        try {
            // c = Camera.open(); // attempt to get a Camera instance
            if (Camera.getNumberOfCameras() >= 2) {

                // backcam.setVisibility(View.VISIBLE);
                // if you want to open front facing camera use this line
                c = Camera.open(CameraInfo.CAMERA_FACING_FRONT);

                c = Camera.open(CameraInfo.CAMERA_FACING_BACK);

            } else {
                c = Camera.open(CameraInfo.CAMERA_FACING_BACK);
            }

            /*
             * c.setDisplayOrientation(90); c.setPreviewDisplay(surfaceHolder);
             * 
             * Camera.Parameters p = c.getParameters(); p.set("camera-id", 2);
             * c.setParameters(p);
             */
        } catch (Exception e) {
            // Camera is not available (in use or does not exist)
        }
        return c; // returns null if camera is unavailable
    }

    private boolean prepareMediaRecorder() {
        myCamera = getCameraInstance();
        myCamera.setDisplayOrientation(90);
        mediaRecorder = new MediaRecorder();

        myCamera.unlock();
        mediaRecorder.setCamera(myCamera);

        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
        mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

        mediaRecorder.setProfile(CamcorderProfile
                .get(CamcorderProfile.QUALITY_LOW));
        mediaRecorder.setOrientationHint(270);

        mediaRecorder.setOutputFile(path);
        mediaRecorder.setMaxDuration(60000); // Set max duration 60 sec.
        mediaRecorder.setOnInfoListener(this);
        mediaRecorder.setMaxFileSize(2500000); // Set max file size 5M

        // mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface());
        mediaRecorder.setPreviewDisplay(myCameraSurfaceView.getHolder()
                .getSurface());

        try {
            mediaRecorder.prepare();
        } catch (IllegalStateException e) {
            releaseMediaRecorder();
            return false;
        } catch (IOException e) {
            releaseMediaRecorder();
            return false;
        }
        return true;

    }

    @Override
    public void onPause() {
        super.onPause();
        releaseMediaRecorder(); // if you are using MediaRecorder, release it
                                // first
        releaseCamera(); // release the camera immediately on pause event
    }

    private void releaseMediaRecorder() {
        if (mediaRecorder != null) {
            mediaRecorder.reset(); // clear recorder configuration
            mediaRecorder.release(); // release the recorder object
            mediaRecorder = null;
            myCamera.lock(); // lock camera for later use
        }
    }

    private void releaseCamera() {
        if (myCamera != null) {
            myCamera.release(); // release the camera for other applications
            myCamera = null;
        }
    }

    public class MyCameraSurfaceView extends SurfaceView implements
            SurfaceHolder.Callback {

        private SurfaceHolder mHolder;
        private Camera mCamera;

        public MyCameraSurfaceView(Context context, Camera camera) {
            super(context);
            mCamera = camera;

            // Install a SurfaceHolder.Callback so we get notified when the
            // underlying surface is created and destroyed.
            mHolder = getHolder();

            mHolder.addCallback(this);
            // deprecated setting, but required on Android versions prior to 3.0
            mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format,
                int weight, int height) {
            // If your preview can change or rotate, take care of those events
            // here.
            // Make sure to stop the preview before resizing or reformatting it.

            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
            }

            // make any resize, rotate or reformatting changes here

            // start preview with new settings
            try {

                mCamera.setPreviewDisplay(mHolder);
                mCamera.startPreview();

            } catch (Exception e) {
            }
        }

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            // TODO Auto-generated method stub
            // The Surface has been created, now tell the camera where to draw
            // the preview.
            try {
                mCamera.setDisplayOrientation(90);
                mCamera.setPreviewDisplay(holder);
                mCamera.startPreview();
            } catch (IOException e) {
            }
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {

        }
    }

    private Runnable updateTimerThread = new Runnable() {

        public void run() {

            timeInMilliseconds = SystemClock.uptimeMillis() - startTime;

            updatedTime = timeSwapBuff + timeInMilliseconds;

            int secs = (int) (updatedTime / 1000);
            int mins = secs / 60;
            secs = secs % 60;
            int milliseconds = (int) (updatedTime % 1000);
            timerValue.setText("" + mins + ":" + String.format("%02d", secs)
                    + ":" + String.format("%03d", milliseconds));
            customHandler.postDelayed(this, 0);
        }

    };

    @Override
    public void onInfo(MediaRecorder mr, int what, int extra) {

        if (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED) {
            Log.v("VIDEOCAPTURE", "Maximum Duration Reached");
            mediaRecorder.stop(); // stop the recording
            releaseMediaRecorder(); // release the MediaRecorder object

            // Exit after saved
            // getActivity().finish();
            getActivity().getFragmentManager().popBackStack();
        }
    }

}

Answer 4

我试过相机 API 2，但我没有时间解决问题时间线。这就是我找到问题解决方案的方式 using camera API 1.当Multiple Views为Handle Single时 Activity。请在相机处理的情况下尝试此代码。

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == CAPTURE_IMAGE_CAPTURE_CODE) {
            if (resultCode == RESULT_OK) {
                Bitmap bp = (Bitmap) data.getExtras().get("data");
                Bitmap resized = Bitmap.createScaledBitmap(bp,
                        (int) (bp.getWidth() * 0.8),
                        (int) (bp.getHeight() * 0.8), true);

                imageView_camera.setImageBitmap(resized);

                SharedPreferences value_1_Details = getSharedPreferences(
                        "Value_1_Key", MODE_PRIVATE);
                Value_1_SelectedPosId = Integer.parseInt(value_1_Details.getString(
                        "Value_1_ID", ""));
                String value_1_Name = value_1_Details.getString("Value_1_Data", "");
                btn_popup_value_1_Name.setText(value_1_Name);

                SharedPreferences value_2_Details = getSharedPreferences(
                        "Value_2_Key", MODE_PRIVATE);
                value_2_SelectedPosId = Integer.parseInt(value_2_Details.getString(
                        "Value_2_ID", ""));
                String value_2_Name = value_2_Details.getString("Value_2_Data", "");
                btn_dropdown_value_2_Name.setText(value_2_Name);

                SharedPreferences value_3_Details = getSharedPreferences(
                        "Value_3_Key", MODE_PRIVATE);
                value_3_PosId = Integer.parseInt(value_3_Details
                        .getString("Value_3_ID", ""));
                String value_3_Name = value_3_Details.getString("Value_3_Data",
                        "");
                btn_dropdown_value_3_Name.setText(value_3_Name);


                rL_include_ViewDetails.setVisibility(View.GONE);
                rL_include_AddNew.setVisibility(View.VISIBLE);
                rL_include_View.setVisibility(View.GONE);

                selectedImageStr = encodeTobase64(resized);

            } else if (resultCode == RESULT_CANCELED) {
                Toast.makeText(this, "Cancelled", Toast.LENGTH_LONG).show();
            }
        }
    }

相机的表面视图在 android 棒棒糖 os 中不起作用

surfaceview for camera is not working in android lollipop os

android

android-intent

android-camera

android-5.1.1-lollipop