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Android 카메라 동영상 녹화 예제 코드입니다.  


2020. 12. 27  최초작성




처음 시작시 권한 설정을 허용해야 합니다.  

RECORD를 클릭시 카메라 녹화가 시작되며 STOP을 클릭하면 영상이 저장되고 갤러리에서 

해당 영상을 찾을 수 있습니다. 영상의 확장자는 MP4입니다. 


원본 코드 출처는 아래 주소입니다. 

권한 설정 관련 코드가 Deprecated되었는데 해결방법을 찾지못해서

 프래그먼트로 작성된 것을 액티비티로 바꾸었습니다. 

추가로 영상을 저장시 갤러리에서 찾을 수 있도록 수정했습니다. 

https://github.com/googlearchive/android-Camera2Video


테스트 환경

Android Studio 4.1.1

Android 10.0+ ( API 30 )




 




AndroidManifest.xml


<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.tistory.webnautes.camera2video">

    <uses-permission android:name="android.permission.CAMERA"/>
    <uses-permission android:name="android.permission.RECORD_AUDIO"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>


    <application
        android:requestLegacyExternalStorage="true"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"




MainActivity.java

package com.tistory.webnautes.camera2video;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.Fragment;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.graphics.Matrix;
import android.graphics.RectF;
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.CameraMetadata;
import android.hardware.camera2.CaptureRequest;
import android.hardware.camera2.params.StreamConfigurationMap;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.HandlerThread;
import android.util.Log;
import android.util.Size;
import android.util.SparseIntArray;
import android.view.Surface;
import android.view.TextureView;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

public class MainActivity extends AppCompatActivity {

    private static final int SENSOR_ORIENTATION_DEFAULT_DEGREES = 90;
    private static final int SENSOR_ORIENTATION_INVERSE_DEGREES = 270;
    private static final SparseIntArray DEFAULT_ORIENTATIONS = new SparseIntArray();
    private static final SparseIntArray INVERSE_ORIENTATIONS = new SparseIntArray();

    private static final String TAG = "Camera2VideoFragment";
    private static final int REQUEST_VIDEO_PERMISSIONS = 1;
    private static final String FRAGMENT_DIALOG = "dialog";

    private static final String[] VIDEO_PERMISSIONS = {
            Manifest.permission.CAMERA,
            Manifest.permission.RECORD_AUDIO,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
    };

    static {
        DEFAULT_ORIENTATIONS.append(Surface.ROTATION_0, 90);
        DEFAULT_ORIENTATIONS.append(Surface.ROTATION_90, 0);
        DEFAULT_ORIENTATIONS.append(Surface.ROTATION_180, 270);
        DEFAULT_ORIENTATIONS.append(Surface.ROTATION_270, 180);
    }

    static {
        INVERSE_ORIENTATIONS.append(Surface.ROTATION_0, 270);
        INVERSE_ORIENTATIONS.append(Surface.ROTATION_90, 180);
        INVERSE_ORIENTATIONS.append(Surface.ROTATION_180, 90);
        INVERSE_ORIENTATIONS.append(Surface.ROTATION_270, 0);
    }

    /**
    * An {@link AutoFitTextureView} for camera preview.
    */
    private AutoFitTextureView mTextureView;

    /**
    * Button to record video
    */
    private Button mButtonVideo;

    /**
    * A reference to the opened {@link android.hardware.camera2.CameraDevice}.
    */
    private CameraDevice mCameraDevice;

    /**
    * A reference to the current {@link android.hardware.camera2.CameraCaptureSession} for
    * preview.
    */
    private CameraCaptureSession mPreviewSession;

    /**
    * {@link TextureView.SurfaceTextureListener} handles several lifecycle events on a
    * {@link TextureView}.
    */
    private TextureView.SurfaceTextureListener mSurfaceTextureListener
            = new TextureView.SurfaceTextureListener() {

        @Override
        public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture,
                                              int width, int height) {
            openCamera(width, height);
        }

        @Override
        public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture,
                                                int width, int height) {
            configureTransform(width, height);
        }

        @Override
        public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
            return true;
        }

        @Override
        public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
        }

    };

    /**
    * The {@link android.util.Size} of camera preview.
    */
    private Size mPreviewSize;

    /**
    * The {@link android.util.Size} of video recording.
    */
    private Size mVideoSize;

    /**
    * MediaRecorder
    */
    private MediaRecorder mMediaRecorder;

    /**
    * Whether the app is recording video now
    */
    private boolean mIsRecordingVideo;

    /**
    * An additional thread for running tasks that shouldn't block the UI.
    */
    private HandlerThread mBackgroundThread;

    /**
    * A {@link Handler} for running tasks in the background.
    */
    private Handler mBackgroundHandler;

    /**
    * A {@link Semaphore} to prevent the app from exiting before closing the camera.
    */
    private Semaphore mCameraOpenCloseLock = new Semaphore(1);

    /**
    * {@link CameraDevice.StateCallback} is called when {@link CameraDevice} changes its status.
    */
    private CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() {

        @Override
        public void onOpened(@NonNull CameraDevice cameraDevice) {
            mCameraDevice = cameraDevice;
            startPreview();
            mCameraOpenCloseLock.release();
            if (null != mTextureView) {
                configureTransform(mTextureView.getWidth(), mTextureView.getHeight());
            }
        }

        @Override
        public void onDisconnected(@NonNull CameraDevice cameraDevice) {
            mCameraOpenCloseLock.release();
            cameraDevice.close();
            mCameraDevice = null;
        }

        @Override
        public void onError(@NonNull CameraDevice cameraDevice, int error) {
            mCameraOpenCloseLock.release();
            cameraDevice.close();
            mCameraDevice = null;
            finish();
        }

    };
    private Integer mSensorOrientation;
    private String mNextVideoAbsolutePath;
    private File mNextVideo;
    private CaptureRequest.Builder mPreviewBuilder;

    /**
    * In this sample, we choose a video size with 3x4 aspect ratio. Also, we don't use sizes
    * larger than 1080p, since MediaRecorder cannot handle such a high-resolution video.
    *
    * @param choices The list of available sizes
    * @return The video size
    */
    private static Size chooseVideoSize(Size[] choices) {
        for (Size size : choices) {
            if (size.getWidth() == size.getHeight() * 4 / 3 && size.getWidth() <= 1080) {
                return size;
            }
        }
        Log.e(TAG, "Couldn't find any suitable video size");
        return choices[choices.length - 1];
    }

    /**
    * Given {@code choices} of {@code Size}s supported by a camera, chooses the smallest one whose
    * width and height are at least as large as the respective requested values, and whose aspect
    * ratio matches with the specified value.
    *
    * @param choices     The list of sizes that the camera supports for the intended output class
    * @param width       The minimum desired width
    * @param height      The minimum desired height
    * @param aspectRatio The aspect ratio
    * @return The optimal {@code Size}, or an arbitrary one if none were big enough
    */
    private static Size chooseOptimalSize(Size[] choices, int width, int height, Size aspectRatio) {
        // Collect the supported resolutions that are at least as big as the preview Surface
        List<Size> bigEnough = new ArrayList<>();
        int w = aspectRatio.getWidth();
        int h = aspectRatio.getHeight();
        for (Size option : choices) {
            if (option.getHeight() == option.getWidth() * h / w &&
                    option.getWidth() >= width && option.getHeight() >= height) {
                bigEnough.add(option);
            }
        }

        // Pick the smallest of those, assuming we found any
        if (bigEnough.size() > 0) {
            return Collections.min(bigEnough, new CompareSizesByArea());
        } else {
            Log.e(TAG, "Couldn't find any suitable preview size");
            return choices[0];
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mTextureView = (AutoFitTextureView) findViewById(R.id.texture);
        mButtonVideo = (Button) findViewById(R.id.video);
        mButtonVideo.setOnClickListener(new Button.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (mIsRecordingVideo) {
                    stopRecordingVideo();
                } else {
                    startRecordingVideo();
                }
            }
        });
        findViewById(R.id.info).setOnClickListener(new Button.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog show = new AlertDialog.Builder(MainActivity.this)
                        .setMessage("This sample demonstrates how to record video using Camera2 API.")
                        .setPositiveButton(android.R.string.ok, null)
                        .show();
            }
        });
    }

    @Override
    public void onResume() {
        super.onResume();
        startBackgroundThread();
        if (mTextureView.isAvailable()) {
            openCamera(mTextureView.getWidth(), mTextureView.getHeight());
        } else {
            mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);
        }
    }

    @Override
    public void onPause() {
        closeCamera();
        stopBackgroundThread();
        super.onPause();
    }

    /**
    * Starts a background thread and its {@link Handler}.
    */
    private void startBackgroundThread() {
        mBackgroundThread = new HandlerThread("CameraBackground");
        mBackgroundThread.start();
        mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
    }

    /**
    * Stops the background thread and its {@link Handler}.
    */
    private void stopBackgroundThread() {
        mBackgroundThread.quitSafely();
        try {
            mBackgroundThread.join();
            mBackgroundThread = null;
            mBackgroundHandler = null;
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    /**
    * Gets whether you should show UI with rationale for requesting permissions.
    *
    * @param permissions The permissions your app wants to request.
    * @return Whether you can show permission rationale UI.
    */
    private boolean shouldShowRequestPermissionRationale(String[] permissions) {
        for (String permission : permissions) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(this, permission)) {
                return true;
            }
        }
        return false;
    }

    /**
    * Requests permissions needed for recording video.
    */
    private void requestVideoPermissions() {
        if (shouldShowRequestPermissionRationale(VIDEO_PERMISSIONS)) {
            new ConfirmationDialog().show(getFragmentManager(), FRAGMENT_DIALOG);
        } else {
            ActivityCompat.requestPermissions( this, VIDEO_PERMISSIONS,
                    REQUEST_VIDEO_PERMISSIONS);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
                                          @NonNull int[] grantResults) {
        Log.d(TAG, "onRequestPermissionsResult");
        if (requestCode == REQUEST_VIDEO_PERMISSIONS) {
            if (grantResults.length == VIDEO_PERMISSIONS.length) {
                for (int result : grantResults) {
                    if (result != PackageManager.PERMISSION_GRANTED) {
                        ErrorDialog.newInstance("This sample needs permission for camera and audio recording.")
                                .show(getFragmentManager(), FRAGMENT_DIALOG);
                        break;
                    }
                }
            } else {
                ErrorDialog.newInstance("This sample needs permission for camera and audio recording.")
                        .show(getFragmentManager(), FRAGMENT_DIALOG);
            }
        } else {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }

    private boolean hasPermissionsGranted(String[] permissions) {
        for (String permission : permissions) {
            if (ActivityCompat.checkSelfPermission(this, permission)
                    != PackageManager.PERMISSION_GRANTED) {
                return false;
            }
        }
        return true;
    }

    /**
    * Tries to open a {@link CameraDevice}. The result is listened by `mStateCallback`.
    */
    @SuppressWarnings("MissingPermission")
    private void openCamera(int width, int height) {
        if (!hasPermissionsGranted(VIDEO_PERMISSIONS)) {
            requestVideoPermissions();
            return;
        }

        if (isFinishing()) {
            return;
        }
        CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
        try {
            Log.d(TAG, "tryAcquire");
            if (!mCameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) {
                throw new RuntimeException("Time out waiting to lock camera opening.");
            }
            String cameraId = manager.getCameraIdList()[0];

            // Choose the sizes for camera preview and video recording
            CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId);
            StreamConfigurationMap map = characteristics
                    .get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
            mSensorOrientation = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
            if (map == null) {
                throw new RuntimeException("Cannot get available preview/video sizes");
            }
            mVideoSize = chooseVideoSize(map.getOutputSizes(MediaRecorder.class));
            mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class),
                    width, height, mVideoSize);

            int orientation = getResources().getConfiguration().orientation;
            if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
                mTextureView.setAspectRatio(mPreviewSize.getWidth(), mPreviewSize.getHeight());
            } else {
                mTextureView.setAspectRatio(mPreviewSize.getHeight(), mPreviewSize.getWidth());
            }
            configureTransform(width, height);
            mMediaRecorder = new MediaRecorder();
            manager.openCamera(cameraId, mStateCallback, null);
        } catch (CameraAccessException e) {
            Toast.makeText(MainActivity.this, "Cannot access the camera.", Toast.LENGTH_SHORT).show();
            finish();
        } catch (NullPointerException e) {
            // Currently an NPE is thrown when the Camera2API is used but not supported on the
            // device this code runs.
            ErrorDialog.newInstance("This device doesn\\'t support Camera2 API.")
                    .show(getFragmentManager(), FRAGMENT_DIALOG);
        } catch (InterruptedException e) {
            throw new RuntimeException("Interrupted while trying to lock camera opening.");
        }
    }

    private void closeCamera() {
        try {
            mCameraOpenCloseLock.acquire();
            closePreviewSession();
            if (null != mCameraDevice) {
                mCameraDevice.close();
                mCameraDevice = null;
            }
            if (null != mMediaRecorder) {
                mMediaRecorder.release();
                mMediaRecorder = null;
            }
        } catch (InterruptedException e) {
            throw new RuntimeException("Interrupted while trying to lock camera closing.");
        } finally {
            mCameraOpenCloseLock.release();
        }
    }

    /**
    * Start the camera preview.
    */
    private void startPreview() {
        if (null == mCameraDevice || !mTextureView.isAvailable() || null == mPreviewSize) {
            return;
        }
        try {
            closePreviewSession();
            SurfaceTexture texture = mTextureView.getSurfaceTexture();
            assert texture != null;
            texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
            mPreviewBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);

            Surface previewSurface = new Surface(texture);
            mPreviewBuilder.addTarget(previewSurface);

            mCameraDevice.createCaptureSession(Collections.singletonList(previewSurface),
                    new CameraCaptureSession.StateCallback() {

                        @Override
                        public void onConfigured(@NonNull CameraCaptureSession session) {
                            mPreviewSession = session;
                            updatePreview();
                        }

                        @Override
                        public void onConfigureFailed(@NonNull CameraCaptureSession session) {
                                Toast.makeText(MainActivity.this, "Failed", Toast.LENGTH_SHORT).show();
                        }
                    }, mBackgroundHandler);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }

    /**
    * Update the camera preview. {@link #startPreview()} needs to be called in advance.
    */
    private void updatePreview() {
        if (null == mCameraDevice) {
            return;
        }
        try {
            setUpCaptureRequestBuilder(mPreviewBuilder);
            HandlerThread thread = new HandlerThread("CameraPreview");
            thread.start();
            mPreviewSession.setRepeatingRequest(mPreviewBuilder.build(), null, mBackgroundHandler);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }

    private void setUpCaptureRequestBuilder(CaptureRequest.Builder builder) {
        builder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
    }

    /**
    * Configures the necessary {@link android.graphics.Matrix} transformation to `mTextureView`.
    * This method should not to be called until the camera preview size is determined in
    * openCamera, or until the size of `mTextureView` is fixed.
    *
    * @param viewWidth  The width of `mTextureView`
    * @param viewHeight The height of `mTextureView`
    */
    private void configureTransform(int viewWidth, int viewHeight) {

        if (null == mTextureView || null == mPreviewSize ) {
            return;
        }
        int rotation = getWindowManager().getDefaultDisplay().getRotation();
        Matrix matrix = new Matrix();
        RectF viewRect = new RectF(0, 0, viewWidth, viewHeight);
        RectF bufferRect = new RectF(0, 0, mPreviewSize.getHeight(), mPreviewSize.getWidth());
        float centerX = viewRect.centerX();
        float centerY = viewRect.centerY();
        if (Surface.ROTATION_90 == rotation || Surface.ROTATION_270 == rotation) {
            bufferRect.offset(centerX - bufferRect.centerX(), centerY - bufferRect.centerY());
            matrix.setRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.FILL);
            float scale = Math.max(
                    (float) viewHeight / mPreviewSize.getHeight(),
                    (float) viewWidth / mPreviewSize.getWidth());
            matrix.postScale(scale, scale, centerX, centerY);
            matrix.postRotate(90 * (rotation - 2), centerX, centerY);
        }
        mTextureView.setTransform(matrix);
    }

    private void setUpMediaRecorder() throws IOException {

        mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
        mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);

        File path = new File (Environment.getExternalStorageDirectory().getAbsolutePath() + "/camtest");
        if (!path.exists()) {
            path.mkdirs();
        }

        String fileName = String.format("%d.mp4", System.currentTimeMillis());
        mNextVideo = new File(path, fileName);
        mNextVideoAbsolutePath = mNextVideo.getAbsolutePath();

        mMediaRecorder.setOutputFile(mNextVideoAbsolutePath);
        mMediaRecorder.setVideoEncodingBitRate(10000000);
        mMediaRecorder.setVideoFrameRate(30);
        mMediaRecorder.setVideoSize(mVideoSize.getWidth(), mVideoSize.getHeight());
        mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
        mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        int rotation = getWindowManager().getDefaultDisplay().getRotation();
        switch (mSensorOrientation) {
            case SENSOR_ORIENTATION_DEFAULT_DEGREES:
                mMediaRecorder.setOrientationHint(DEFAULT_ORIENTATIONS.get(rotation));
                break;
            case SENSOR_ORIENTATION_INVERSE_DEGREES:
                mMediaRecorder.setOrientationHint(INVERSE_ORIENTATIONS.get(rotation));
                break;
        }
        mMediaRecorder.prepare();
    }

    private void startRecordingVideo() {
        if (null == mCameraDevice || !mTextureView.isAvailable() || null == mPreviewSize) {
            return;
        }
        try {
            closePreviewSession();
            setUpMediaRecorder();
            SurfaceTexture texture = mTextureView.getSurfaceTexture();
            assert texture != null;
            texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
            mPreviewBuilder = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
            List<Surface> surfaces = new ArrayList<>();

            // Set up Surface for the camera preview
            Surface previewSurface = new Surface(texture);
            surfaces.add(previewSurface);
            mPreviewBuilder.addTarget(previewSurface);

            // Set up Surface for the MediaRecorder
            Surface recorderSurface = mMediaRecorder.getSurface();
            surfaces.add(recorderSurface);
            mPreviewBuilder.addTarget(recorderSurface);

            // Start a capture session
            // Once the session starts, we can update the UI and start recording
            mCameraDevice.createCaptureSession(surfaces, new CameraCaptureSession.StateCallback() {

                @Override
                public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
                    mPreviewSession = cameraCaptureSession;
                    updatePreview();
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            // UI
                            mButtonVideo.setText("Stop");
                            mIsRecordingVideo = true;

                            // Start recording
                            mMediaRecorder.start();
                        }
                    });
                }

                @Override
                public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {
                    Toast.makeText(MainActivity.this, "Failed", Toast.LENGTH_SHORT).show();
                }
            }, mBackgroundHandler);
        } catch (CameraAccessException | IOException e) {
            e.printStackTrace();
        }

    }

    private void closePreviewSession() {
        if (mPreviewSession != null) {
            mPreviewSession.close();
            mPreviewSession = null;
        }
    }

    private void stopRecordingVideo() {
        // UI
        mIsRecordingVideo = false;
        mButtonVideo.setText("Record");
        // Stop recording
        mMediaRecorder.stop();
        mMediaRecorder.reset();

        Intent mediaScanIntent = new Intent( Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
        mediaScanIntent.setData(Uri.fromFile(mNextVideo));
        sendBroadcast(mediaScanIntent);

        Toast.makeText(MainActivity.this, "Video saved: " + mNextVideoAbsolutePath,
                Toast.LENGTH_SHORT).show();
        Log.d(TAG, "Video saved: " + mNextVideoAbsolutePath);

        mNextVideoAbsolutePath = null;
        startPreview();
    }

    /**
    * Compares two {@code Size}s based on their areas.
    */
    static class CompareSizesByArea implements 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());
        }

    }

    public static class ErrorDialog extends DialogFragment {

        private static final String ARG_MESSAGE = "message";

        public static ErrorDialog newInstance(String message) {
            ErrorDialog dialog = new ErrorDialog();
            Bundle args = new Bundle();
            args.putString(ARG_MESSAGE, message);
            dialog.setArguments(args);
            return dialog;
        }

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            final Activity activity = getActivity();
            return new AlertDialog.Builder(activity)
                    .setMessage(getArguments().getString(ARG_MESSAGE))
                    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            activity.finish();
                        }
                    })
                    .create();
        }

    }

    public static class ConfirmationDialog extends DialogFragment {

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            final Fragment parent = getParentFragment();
            return new AlertDialog.Builder(getActivity())
                    .setMessage("This sample needs permission for camera and audio recording.")
                    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            ActivityCompat.requestPermissions( getActivity(), VIDEO_PERMISSIONS,
                                    REQUEST_VIDEO_PERMISSIONS);
                        }
                    })
                    .setNegativeButton(android.R.string.cancel,
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                    parent.getActivity().finish();
                                }
                            })
                    .create();
        }

    }

}




AutoFitTextureView.java 


package com.tistory.webnautes.camera2video;

import android.content.Context;
import android.util.AttributeSet;
import android.view.TextureView;

/**
* A {@link TextureView} that can be adjusted to a specified aspect ratio.
*/
public class AutoFitTextureView extends TextureView {

    private int mRatioWidth = 0;
    private int mRatioHeight = 0;

    public AutoFitTextureView(Context context) {
        this(context, null);
    }

    public AutoFitTextureView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public AutoFitTextureView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    /**
    * Sets the aspect ratio for this view. The size of the view will be measured based on the ratio
    * calculated from the parameters. Note that the actual sizes of parameters don't matter, that
    * is, calling setAspectRatio(2, 3) and setAspectRatio(4, 6) make the same result.
    *
    * @param width  Relative horizontal size
    * @param height Relative vertical size
    */
    public void setAspectRatio(int width, int height) {
        if (width < 0 || height < 0) {
            throw new IllegalArgumentException("Size cannot be negative.");
        }
        mRatioWidth = width;
        mRatioHeight = height;
        requestLayout();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int width = MeasureSpec.getSize(widthMeasureSpec);
        int height = MeasureSpec.getSize(heightMeasureSpec);
        if (0 == mRatioWidth || 0 == mRatioHeight) {
            setMeasuredDimension(width, height);
        } else {
            if (width < height * mRatioWidth / mRatioHeight) {
                setMeasuredDimension(width, width * mRatioHeight / mRatioWidth);
            } else {
                setMeasuredDimension(height * mRatioWidth / mRatioHeight, height);
            }
        }
    }

}




activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.tistory.webnautes.camera2video.AutoFitTextureView
        android:id="@+id/texture"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true" />

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentStart="true"
        android:layout_below="@id/texture"
        android:background="#4285f4">

        <Button
            android:id="@+id/video"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="Record" />

        <ImageButton
            android:id="@+id/info"
            android:contentDescription="Info"
            style="@android:style/Widget.Material.Light.Button.Borderless"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical|right"
            android:padding="20dp"
            android:src="@android:drawable/ic_dialog_info" />

    </FrameLayout>

</RelativeLayout>




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포스트 작성시에는 문제 없었지만 이후 문제가 생길 수 있습니다.
질문을 남겨주면 가능한 빨리 답변드립니다.

여러분의 응원으로 좋은 컨텐츠가 만들어집니다.
지금 본 내용이 도움이 되었다면 유튜브 구독 부탁드립니다. 감사합니다 ~~

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