我的相机出现问题。单击捕获按钮后，将捕获Uri，但实际上未将图像存储在外部存储器上。看来它已被丢弃或我弄乱了某些东西。这曾经可以正常工作，但是尝试与我的GreenDao数据库集成时不再起作用。
package com.example.joelg.lion.Camera;
import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.ImageFormat;
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.TotalCaptureResult;
import android.hardware.camera2.params.StreamConfigurationMap;
import android.media.Image;
import android.media.ImageReader;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.HandlerThread;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
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.ImageButton;
import android.widget.Toast;
import com.example.joelg.lion.Gallery.GalleryActivity;
import com.example.joelg.lion.Job.ImgStore;
import com.example.joelg.lion.Job.JobActivity;
import com.example.joelg.lion.Job.Lion;
import com.example.joelg.lion.R;
import com.example.joelg.lion.db.DaoSession;
import org.greenrobot.greendao.annotation.NotNull;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import static com.example.joelg.lion.R.id.GalleryBtn;
import static java.lang.String.*;
public class CameraActivity extends AppCompatActivity implements Runnable {
private static final String TAG = "AndroidCameraApi";
private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
private static final int REQUEST_CAMERA_PERMISSION = 200;
static {
ORIENTATIONS.append(Surface.ROTATION_0, 90);
ORIENTATIONS.append(Surface.ROTATION_90, 0);
ORIENTATIONS.append(Surface.ROTATION_180, 270);
ORIENTATIONS.append(Surface.ROTATION_270, 180);
}
protected CameraDevice cameraDevice;
protected CameraCaptureSession cameraCaptureSessions;
protected CaptureRequest.Builder captureRequestBuilder;
Date currentTime = Calendar.getInstance().getTime();
String ImgTimeStamp = currentTime.toString();
private TextureView textureView;
private final CameraDevice.StateCallback stateCallback = new CameraDevice.StateCallback() {
@Override
public void onOpened(CameraDevice camera) {
Log.e(TAG, "onOpened");
cameraDevice = camera;
createCameraPreview();
}
@Override
public void onDisconnected(CameraDevice camera) {
Log.e(TAG, "On Disconnected");
// cameraDevice.close();
// stopBackgroundThread();
}
@Override
public void onError(CameraDevice camera, int error) {
cameraDevice.close();
cameraDevice = null;
}
};
private ImageButton takePictureButton;
private Size imageDimension;
TextureView.SurfaceTextureListener textureListener = new TextureView.SurfaceTextureListener() {
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
openCamera();
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
return false;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
};
//save file
private File file;
private Handler mBackgroundHandler = new Handler();
private String cameraId;
private int CameraWidth = 1440;
private int CameraHeight = 2960;
private HandlerThread mBackgroundThread;
public void run() {
System.out.println("Thread Running");
}
private Long ImgID() {
long upperLimit = 15L;
long lowerLimit = 0L;
Long GeneratedID = lowerLimit + ( long ) (Math.random() * upperLimit - lowerLimit);
return GeneratedID;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
setContentView(R.layout.activity_camera);
textureView = findViewById(R.id.texture);
assert textureView != null;
textureView.setSurfaceTextureListener(textureListener);
takePictureButton = findViewById(R.id.CaptureBtn);
assert takePictureButton != null;
///##############################################
takePictureButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
takePicture();
}
});
//################################################
ImageButton BackButton = findViewById(R.id.BackCamBtn);
BackButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v) {
{
Intent intent = new Intent(CameraActivity.this, JobActivity.class);
startActivity(intent);
}
}
});
//#######################################
ImageButton GalleryButton = findViewById(GalleryBtn);
GalleryButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v) {
{
//onPause();
Intent intent = new Intent(CameraActivity.this, GalleryActivity.class);
startActivity(intent);
}
}
});
}
protected void takePicture() {
if (null == cameraDevice) {
Log.e(TAG, "cameraDevice is null");
return;
}
CameraManager manager = ( CameraManager ) getSystemService(Context.CAMERA_SERVICE);
try {
CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraDevice.getId());
Size[] jpegSizes = null;
if (characteristics != null) {
jpegSizes = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP)
.getOutputSizes(ImageFormat.JPEG);
}
int width = CameraWidth;
int height = CameraHeight;
if (jpegSizes != null && 0 < jpegSizes.length) {
width = jpegSizes[0].getWidth();
height = jpegSizes[0].getHeight();
}
final ImageReader reader = ImageReader.newInstance(width, height, ImageFormat.JPEG, 10);
List<Surface> outputSurface = new ArrayList<>(2);
outputSurface.add(reader.getSurface());
outputSurface.add(new Surface(textureView.getSurfaceTexture()));
final CaptureRequest.Builder captureBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
captureBuilder.addTarget(reader.getSurface());
captureBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
//check oreintation
int rotation = getWindowManager().getDefaultDisplay().getRotation();
captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));
DaoSession daoSession = (( Lion ) getApplication()).getDaoSession();
try {
file = new File(Environment.getExternalStorageDirectory()
, (ImgID() +".jpg"));
String FilePath = file.getPath();
daoSession.insert(new ImgStore("", FilePath, ImgTimeStamp, ImgID()));
Log.d("APP_DEBUG", "Image saved : " + file.toString());
List<ImgStore> imgList = daoSession.loadAll(ImgStore.class);
for (ImgStore img : imgList) {
Log.d("APP_DEBUG", img.getImgURL());
}
} catch (Exception e) {
//
}
HandlerThread handlerThread=new HandlerThread("takepicture");
handlerThread.start();
mBackgroundHandler = new Handler(handlerThread.getLooper());
ImageReader.OnImageAvailableListener readerListener = new ImageReader.OnImageAvailableListener() {
@Override
public void onImageAvailable(ImageReader imageReader) {
Image image = null;
try {
image = reader.acquireLatestImage();
ByteBuffer buffer = image.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.capacity()];
buffer.get(bytes);
save(bytes);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
{
if (image != null)
image.close();
}
}
}
private void save(byte[] bytes) throws IOException {
OutputStream outputStream = null;
try {
outputStream = new FileOutputStream(file);
textureView.getBitmap().compress(Bitmap.CompressFormat.JPEG,100,outputStream);
} finally {
if (outputStream != null)
outputStream.close();
}
}
};
reader.setOnImageAvailableListener(readerListener, mBackgroundHandler);
final CameraCaptureSession.CaptureCallback captureListener = new CameraCaptureSession.CaptureCallback() {
@Override
public void onCaptureCompleted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, @NonNull TotalCaptureResult result) {
super.onCaptureCompleted(session, request, result);
Toast.makeText(CameraActivity.this, "Saved" + file, Toast.LENGTH_SHORT).show();
createCameraPreview();
}
};
cameraDevice.createCaptureSession(outputSurface, new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(@NotNull CameraCaptureSession cameraCaptureSession) {
try {
cameraCaptureSession.capture(captureBuilder.build(), captureListener, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
@Override
public void onConfigureFailed(@NotNull CameraCaptureSession cameraCaptureSession) {
}
}, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
private void createCameraPreview() {
try {
SurfaceTexture texture = textureView.getSurfaceTexture();
assert texture != null;
texture.setDefaultBufferSize(imageDimension.getWidth(), imageDimension.getHeight());
Surface surface = new Surface(texture);
captureRequestBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
captureRequestBuilder.addTarget(surface);
cameraDevice.createCaptureSession(Arrays.asList(surface), new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
if (cameraDevice == null)
return;
cameraCaptureSessions = cameraCaptureSession;
updatePreview();
}
@Override
public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {
Toast.makeText(CameraActivity.this, "Changed", Toast.LENGTH_SHORT).show();
}
}, null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
private void updatePreview() {
if (cameraDevice == null)
Toast.makeText(this, "Error", Toast.LENGTH_SHORT).show();
captureRequestBuilder.set(CaptureRequest.CONTROL_MODE, CaptureRequest.CONTROL_MODE_AUTO);
try {
cameraCaptureSessions.setRepeatingRequest(captureRequestBuilder.build(), null, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
private void openCamera() {
CameraManager manager = ( CameraManager ) getSystemService(Context.CAMERA_SERVICE);
try {
cameraId = manager.getCameraIdList()[0];
CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId);
StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
assert map != null;
imageDimension = map.getOutputSizes(SurfaceTexture.class)[0];
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{
Manifest.permission.CAMERA,
Manifest.permission.WRITE_EXTERNAL_STORAGE
}, REQUEST_CAMERA_PERMISSION);
return;
}
manager.openCamera(cameraId, stateCallback, null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NotNull String[] permissions, @NotNull int[] grantResullts) {
if (requestCode == REQUEST_CAMERA_PERMISSION) {
if (grantResullts[0] != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "you cant use camera without permission", Toast.LENGTH_SHORT).show();
finish();
}
}
}
@Override
protected void onResume() {
super.onResume();
if (textureView.isAvailable())
openCamera();
else
textureView.setSurfaceTextureListener(textureListener);
}
@Override
protected void onPause() {
super.onPause();
}
private void closeCamera() {
Log.e(TAG, "Closing Camera");
if (null != cameraDevice) {
cameraDevice.close();
cameraDevice = null;
stopBackgroundThread();
}
}
private void stopBackgroundThread() {
mBackgroundThread.quitSafely();
try {
mBackgroundThread.join();
mBackgroundThread = null;
mBackgroundThread = null;
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
这可能已经解决，但我找不到可行的解决方案。 谢谢。
答案 0 :(得分：0)
好吧，所以回到我的代码后，发现我的保存机制已损坏，并添加了此文件即可解决问题
private File getOutputMediaFile() {
File mediaStorageDir = new File(Environment.getExternalStorageDirectory(), "Lion");
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d("Lion", "failed to create Dir");
return null;
}
}
timeStamp = new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_ " + timeStamp + ".jpg");
TempImg = mediaFile.toString();
return mediaFile;
}
将其应用于我的保存功能后，它就会起作用