我已经尝试了几个小时了，但似乎仍然无法让它发挥作用。
使用this作为引用。我编写了一个记录和保存视频的应用程序。我运行引用应用程序没有任何问题，但当我运行自己的应用程序时出现了许多问题。
问题:
该应用程序在录制视频、保存视频等方面没有问题。但是，在录制并保存第一个视频后，如果我尝试录制第二个视频，它会崩溃。第二个错误据说是由 MediaRecorder:prepare failed: -2147483648 引起的，这又导致了 IllegalStateException。(日志如下)我该如何解决这个问题？
list 权限:
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>
<uses-feature android:name="android.hardware.camera2.full" />
代码:
public class VideoCapture extends AppCompatActivity {
static final int REQUEST_CODE_CAMERA = 0;
static final int REQUEST_CODE_EXTERNAL_WRITE = 1;
static final int REQUEST_CODE_MICROPHONE = 2;
static SparseIntArray ORIENTATIONS = new SparseIntArray();
static {
ORIENTATIONS.append(Surface.ROTATION_0, 0);
ORIENTATIONS.append(Surface.ROTATION_90, 90);
ORIENTATIONS.append(Surface.ROTATION_180, 180);
ORIENTATIONS.append(Surface.ROTATION_270, 270);
}
static class CompareSizeByArea implements Comparator<Size> {
@Override
public int compare(Size lhs, Size rhs) {
return Long.signum((long) (lhs.getWidth() * lhs.getHeight()) - (long) (rhs.getWidth() * rhs.getHeight()));
}
}
File videoFolder;
File videoFile;
ImageButton recordButton;
Chronometer chronometer;
String cameraID;
MediaRecorder mediaRecorder;
Size previewSize;
Size videoSize;
int totalRotation;
boolean isRecording;
HandlerThread backgroundHandlerThread;
Handler backgroundHandler;
CaptureRequest.Builder captureRequestBuilder;
CameraCaptureSession previewCaptureSession;
CameraCaptureSession recordCaptureSession;
TextureView textureView;
TextureView.SurfaceTextureListener surfaceTextureListener = new TextureView.SurfaceTextureListener() {
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
setupCamera(width, height);
startCamera();
Log.e("onSurfaceTextureAvail", "startCamera width:"+String.valueOf(width)+" height" +String.valueOf(height));
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
Log.e("onSurfaceTextureDestroy","Surface destroyed" + String.valueOf(surface));
return false;
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
Log.e("onSurfaceTextureSizeCha","Surface changed" + String.valueOf(surface) +"width" +String.valueOf(width)+" height" +String.valueOf(height));
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
};
CameraDevice cameraDevice;
CameraDevice.StateCallback cameraDeviceStateCallback = new CameraDevice.StateCallback() {
@Override
public void onOpened(CameraDevice camera) {
cameraDevice = camera;
mediaRecorder = new MediaRecorder();
Log.e("cameraDeviceStateCalbac","onOpened mediaRecorder = new MediaRecorder(); camera:"+String.valueOf(camera));
/**
* Application will "Reset" when granting write storage permission and call onPause and onResume.
* The check is to ensure that the camera will correctly follow up with start record.
**/
Log.e("cameraDeviceStateCalbac", "onOpened calling startPreview");
startPreview();
}
@Override
public void onDisconnected(CameraDevice camera) {
Log.e("cameraDeviceStateCalbac", "onDisconnected closing camera" + String.valueOf(camera));
camera.close();
cameraDevice = null;
Log.e("cameraDeviceStateCalbac", "onDisconnected nulling camera to value:" + String.valueOf(cameraDevice));
}
@Override
public void onError(CameraDevice camera, int error) {
Log.e("cameraDeviceStateCalbac", "onError closing camera" + String.valueOf(camera)+"Error value: "+String.valueOf(error));
camera.close();
cameraDevice = null;
Log.e("cameraDeviceStateCalbac", "onError nulling camera to value:" + String.valueOf(cameraDevice));
}
};
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK)) {
finish();
}
return super.onKeyDown(keyCode, event);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_videocapture);
Log.e("onCreate", "Running");
if (checkCameraPermission() != PackageManager.PERMISSION_GRANTED) requestCameraPermission();
if (checkWriteExternalStoragePermission() != PackageManager.PERMISSION_GRANTED)
requestWriteExternalStoragePermission();
if (checkMicrophonePermission() != PackageManager.PERMISSION_GRANTED)
requestMicrophonePermission();
Log.e("onCreate", "Calling createVideoFolder");
createVideoFolder();
isRecording = false;
Log.e("onCreate", "setting isRecording Value" + String.valueOf(isRecording));
// Chronometer is the timer during a video recording
chronometer = (Chronometer) findViewById(R.id.chronometer);
// TextureView is the container that displays the preview
textureView = (TextureView) findViewById(R.id.textureView);
// Set up video capture click handler
recordButton = (ImageButton) findViewById(R.id.recordButton);
Log.e("onCreate", "recordButton setOnClickListener");
recordButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) // Record/Stop button click
{
Log.e("recordOnClick","RUNNING");
if (!isRecording) // Start Recording
{
Log.e("recordOnClick","isRecording = false");
if (checkCameraPermission() == PackageManager.PERMISSION_GRANTED &&
checkWriteExternalStoragePermission() == PackageManager.PERMISSION_GRANTED) {
try {
isRecording = true;
Log.e("recordOnClick"," set isRecording = true. Final value: "+String.valueOf(isRecording));
recordButton.setImageResource(R.mipmap.btn_video_busy);
Log.e("recordOnClick", "Calling createVideoFile()");
createVideoFile();
Log.e("recordOnClick", "Calling startRecord()");
startRecord();
Log.e("recordOnClick", "Calling mediaRecorder.start()");
mediaRecorder.start();
Log.e("recordOnClick", "If you see this, mediaRecorder.start() passed.");
chronometer.setBase(SystemClock.elapsedRealtime());
chronometer.setVisibility(View.VISIBLE);
chronometer.start();
} catch (IllegalArgumentException iaEx) {
Log.e("recordOnClick","click to record failed.");
StringWriter writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
iaEx.printStackTrace(printWriter);
printWriter.flush();
String stackTrace = writer.toString();
Toast.makeText(getApplicationContext(), stackTrace, Toast.LENGTH_LONG).show();
} catch (IOException ex) {
Log.e("recordOnClick","click to record failed.");
}
}
} else // Stop recording
{
Log.e("recordOnClick","isRecording = true");
isRecording = false;
Log.e("recordOnClick"," set isRecording = false. Final value: "+String.valueOf(isRecording));
chronometer.stop();
chronometer.setVisibility(View.INVISIBLE);
recordButton.setImageResource(R.mipmap.btn_video_online);
Log.e("recordOnClick","Calling mediaRecorder.stop()");
mediaRecorder.stop();
Log.e("recordOnClick", "If you see this, mediaRecorder.stop() passed.");
Log.e("recordOnClick","Calling mediaRecorder.reset()");
mediaRecorder.reset();
Log.e("recordOnClick", "If you see this, mediaRecorder.reset() passed.");
Intent mediaStoreUpdateIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
mediaStoreUpdateIntent.setData(Uri.fromFile(videoFile));
sendBroadcast(mediaStoreUpdateIntent);
Log.e("recordOnClick","Calling startPreview()");
startPreview();
Log.e("recordOnClick", "If you see this, startPreview() passed.");
Intent intent = new Intent(VideoCapture.this, FrameExtraction.class);
intent.putExtra("videoUri", Uri.fromFile(videoFile));
Log.e("recordOnClick","Video Uri Saved" + String.valueOf(Uri.fromFile(videoFile)));
startActivity(intent);
finish();
}
}
});
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == REQUEST_CODE_CAMERA)
{
if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(getApplicationContext(), "Application will not be able to capture videos without camera permission.", Toast.LENGTH_SHORT).show();
}
} else if (requestCode == REQUEST_CODE_EXTERNAL_WRITE)
{
if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(getApplicationContext(), "Application doesn't have write permission. Videos cannot be saved.", Toast.LENGTH_SHORT).show();
}
} else if (requestCode == REQUEST_CODE_MICROPHONE) {
if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(getApplicationContext(), "Application doesn't have microphone permission. Videos will have no audio.", Toast.LENGTH_SHORT).show();
}
}
}
@Override
protected void onResume() {
super.onResume();
startBackgroundThread();
if (textureView.isAvailable()) {
setupCamera(textureView.getWidth(), textureView.getHeight());
startCamera();
Log.e("RESUME", "RESUME STARTCAMERA");
} else {
textureView.setSurfaceTextureListener(surfaceTextureListener);
Log.e("RESUME", "ELSE, SET TEXTURE LISTENER");
}
}
@Override
protected void onPause() {
Log.e("PAUSE", "PAUSE CloseCAMERA");
cameraDevice.close();
cameraDevice = null;
stopBackgroundThread();
super.onPause();
}
@Override
public void onWindowFocusChanged(boolean hasFocas) {
super.onWindowFocusChanged(hasFocas);
View decorView = getWindow().getDecorView();
if (hasFocas) {
decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
}
}
private void setupCamera(int width, int height) {
Log.e("setupCamera","RUNNING");
CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
identification number
for (String currentCameraId : cameraManager.getCameraIdList()) {
CameraCharacteristics cameraCharacteristics = cameraManager.getCameraCharacteristics(currentCameraId);
if (cameraCharacteristics.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_FRONT)
continue;
int deviceOrientation = getWindowManager().getDefaultDisplay().getRotation();
totalRotation = sensorToDeviceRotation(cameraCharacteristics, deviceOrientation);
boolean swapRotation = totalRotation == 90 || totalRotation == 270;
int rotatedWidth = width;
int rotatedHeight = height;
if (swapRotation) {
rotatedWidth = height;
rotatedHeight = width;
}
StreamConfigurationMap map = cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
previewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class), rotatedWidth, rotatedHeight);
videoSize = chooseOptimalSize(map.getOutputSizes(MediaRecorder.class), rotatedWidth, rotatedHeight);
cameraID = currentCameraId;
return;
}
} catch (CameraAccessException e) {
}
}
private int sensorToDeviceRotation(CameraCharacteristics cameraCharacteristics, int deviceOrientation) {
int sensorOrienatation = cameraCharacteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
deviceOrientation = ORIENTATIONS.get(deviceOrientation);
return (sensorOrienatation + deviceOrientation + 360) % 360;
}
private Size chooseOptimalSize(Size[] choices, int width, int height) {
List<Size> bigEnough = new ArrayList<>();
for (Size option : choices) {
if (option.getHeight() == option.getWidth() * height / width && option.getWidth() >= width && option.getHeight() >= height) {
bigEnough.add(option);
}
}
if (bigEnough.size() > 0) {
return Collections.min(bigEnough, new CompareSizeByArea());
} else {
return choices[0];
}
}
private void startCamera() {
Log.e("startCamera()","RUNNING");
CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
try {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkCameraPermission() == PackageManager.PERMISSION_GRANTED)
cameraManager.openCamera(cameraID, cameraDeviceStateCallback, backgroundHandler);
else {
requestCameraPermission();
}
} else
cameraManager.openCamera(cameraID, cameraDeviceStateCallback, backgroundHandler);
} catch (CameraAccessException e) {
Log.e("startCamera()", "Failed to cameraManager.openCamera" + String.valueOf(e));
}
}
private void startPreview() {
Log.e("startPreview","RUNNING");
SurfaceTexture surfaceTexture = textureView.getSurfaceTexture();
surfaceTexture.setDefaultBufferSize(previewSize.getWidth(), previewSize.getHeight());
Surface previewSurface = new Surface(surfaceTexture);
try {
captureRequestBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
captureRequestBuilder.addTarget(previewSurface);
cameraDevice.createCaptureSession(Arrays.asList(previewSurface),
new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(CameraCaptureSession session) {
previewCaptureSession = session;
try {
previewCaptureSession.setRepeatingRequest(captureRequestBuilder.build(), null, backgroundHandler);
} catch (CameraAccessException e) {
}
}
@Override
public void onConfigureFailed(CameraCaptureSession session) {
Log.e("startPreview", "onConfigureFailed");
}
}, null);
} catch (CameraAccessException e) {
Log.e("startPreviewCATCH", "StartPreview FAILED CATCH: " + String.valueOf(e));
}
}
private void startRecord() {
try {
Log.e("startRecord", "RUNNING");
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mediaRecorder.setOutputFile(videoFile.getAbsolutePath());
mediaRecorder.setVideoEncodingBitRate(1000000);
mediaRecorder.setVideoFrameRate(60);
mediaRecorder.setVideoSize(videoSize.getWidth(), videoSize.getHeight());
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
mediaRecorder.setOrientationHint(totalRotation);
}catch(Exception e){
}
try {
mediaRecorder.prepare();
Log.e("startRecord","mediaRecorder.prepare()");
SurfaceTexture surfaceTexture = textureView.getSurfaceTexture();
surfaceTexture.setDefaultBufferSize(previewSize.getWidth(), previewSize.getHeight());
Surface previewSurface = new Surface(surfaceTexture);
Surface recordSurface = mediaRecorder.getSurface();
captureRequestBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_RECORD);
captureRequestBuilder.addTarget(previewSurface);
captureRequestBuilder.addTarget(recordSurface);
cameraDevice.createCaptureSession(Arrays.asList(previewSurface, recordSurface),
new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(CameraCaptureSession session) {
recordCaptureSession = session;
try {
recordCaptureSession.setRepeatingRequest(captureRequestBuilder.build(), null, null);
} catch (CameraAccessException e) {
}
}
@Override
public void onConfigureFailed(CameraCaptureSession session) {
}
}, null);
} catch (IOException ioEx) {
Log.e("prepare Failed", String.valueOf(ioEx));
} // mediaRecorder.prepare()
catch (CameraAccessException caEx) {
} // cameraDevice.createCaptureSession()
}
private void closeCamera() {
if (cameraDevice != null) {
cameraDevice.close();
cameraDevice = null;
}
if (mediaRecorder != null) {
mediaRecorder.reset();
Log.e("closeCamera()","mediaRecorder.reset()");
mediaRecorder = null;
Log.e("closeCamera()","mediaRecorder = null");
}
}
private int checkCameraPermission() {
return ContextCompat.checkSelfPermission(this, android.Manifest.permission.CAMERA);
}
private int checkWriteExternalStoragePermission() {
return ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
}
private int checkMicrophonePermission() {
return ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO);
}
private void requestCameraPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
requestPermissions(new String[]{Manifest.permission.CAMERA}, REQUEST_CODE_CAMERA);
}
private void requestWriteExternalStoragePermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_CODE_EXTERNAL_WRITE);
}
private void requestMicrophonePermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
requestPermissions(new String[]{Manifest.permission.RECORD_AUDIO}, REQUEST_CODE_MICROPHONE);
}
private void createVideoFolder() {
// Create the folder for video files to be written to if it doesn't exist.
// Battery Videos is the folder name created under the movies public directory.
Log.e("createVideoFolder", "RUNNING");
videoFolder = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES), "Battery Videos");
if (!videoFolder.exists()) videoFolder.mkdirs();
}
private File createVideoFile() throws IOException {
String timestamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String fileName = "Video_" + timestamp + ".mp4";
videoFile = new File(videoFolder, fileName);
return videoFile;
}
private void startBackgroundThread() {
backgroundHandlerThread = new HandlerThread("Camera2VideoImage");
backgroundHandlerThread.start();
backgroundHandler = new Handler(backgroundHandlerThread.getLooper());
}
private void stopBackgroundThread() {
backgroundHandlerThread.quitSafely();
try {
backgroundHandlerThread.join();
backgroundHandlerThread = null;
backgroundHandler = null;
} catch (InterruptedException e) {
}
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.e("onDestroy", "It Happened");
mediaRecorder.release();
}
}
startRecord() 中的堆栈跟踪:
W/System.err: java.io.IOException: prepare failed.
W/System.err: at android.media.MediaRecorder._prepare(Native Method)
W/System.err: at android.media.MediaRecorder.prepare(MediaRecorder.java:782)
W/System.err: at com.application.batterysoc.activity.VideoCapture.startRecord(VideoCapture.java:490)
W/System.err: at com.application.batterysoc.activity.VideoCapture.access$600(VideoCapture.java:55)
W/System.err: at com.application.batterysoc.activity.VideoCapture$3.onClick(VideoCapture.java:214)
W/System.err: at android.view.View.performClick(View.java:4861)
W/System.err: at android.view.View$PerformClick.run(View.java:19980)
W/System.err: at android.os.Handler.handleCallback(Handler.java:739)
W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95)
W/System.err: at android.os.Looper.loop(Looper.java:211)
W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5373)
W/System.err: at java.lang.reflect.Method.invoke(Native Method)
W/System.err: at java.lang.reflect.Method.invoke(Method.java:372)
W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1020)
W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:815)
E/recordOnClick: Calling mediaRecorder.start()
最佳答案
关于java - Android:尝试第二次录制时 Camera2 API 崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45902858/