在使用自定义相机的 Camera2 API 捕获图像后尝试导航到下一个 activity 时，我的应用程序崩溃
My app crashes when trying to navigate to next activity after capturing image using Camera2 API for custom camera
我已将 Google 中的示例代码用于 Camera2 API - Camera2 API sample code
我还在相机预览上添加了一个矩形叠加层。当我尝试导航到下一个 activity 以显示捕获的图像时，出现 SIGSEGV 错误。
我认为问题的产生是因为Canvas。我不确定，但这里的一些答案表明这可能是问题所在，因为我在开始下一个意图之前关闭相机 activity.
canvas是使用Preview的宽度和高度来绘制矩形。这可能是我关闭 Camera 对象时的问题吗？
Rectangle.java
package com.example.googlecamera2;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.Log;
import android.view.View;
public class Rectangle extends View {
Paint paint = new Paint();
Context context;
int width;
int height;
public Rectangle(Context context, int width, int height) {
super(context);
this.context = context;
this.width = width;
this.height = height;
}
@Override
public void onDraw(Canvas canvas) {
paint.setColor(Color.GREEN);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(6);
Log.e("RECT", width +" "+ height);
Rect rect = new Rect(width/8, height/8, 7*width/8, 7*height/8);
canvas.drawRect(rect, paint);
}
}
这是保存图像的方法调用
@Override
public void onImageAvailable(ImageReader reader) {
mBackgroundHandler.post(new ImageSaver(reader.acquireNextImage(), mFile));
closeCameraDevice();
startActivity(new Intent(getActivity(), DisplayImage.class).putExtra("IMAGE", mFile.getPath()));
}
};
这是ImageSaver方法
private class ImageSaver implements Runnable {
/**
* The JPEG image
*/
private final Image mImage;
/**
* The file we save the image into.
*/
private final File mFile;
ImageSaver(Image image, File file) {
mImage = image;
mFile = file;
}
@Override
public void run() {
// System.gc();
ByteBuffer buffer = mImage.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.remaining()];
buffer.get(bytes);
capturedImage = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
// Rectangle is drawn by dividing the preview in 8 dimensions and the rectangle starts
// on 2nd dimension and ends on 7th dimension so take 6 for dividing the width and height
int left = capturedImage.getWidth() / 8;
int top = capturedImage.getHeight() / 8;
int cropWidth = 6*left;
int cropHeight = 6*top;
Matrix rotationMatrix = new Matrix();
rotationMatrix.postRotate(90);
Log.e("Image dim", capturedImage.getWidth()+" "+capturedImage.getHeight());
Log.e("Crop dim", left+" "+top+" "+cropWidth+" "+cropHeight);
croppedImage = Bitmap.createBitmap(capturedImage, left, top, cropWidth, cropHeight, rotationMatrix, false);
//Destroy the original bitmap image
capturedImage.recycle();
FileOutputStream output = null;
try {
output = new FileOutputStream(mFile);
croppedImage.compress(Bitmap.CompressFormat.JPEG, 100, output);
output.flush();
}
catch (IOException e) {
e.printStackTrace();
} finally
{
mImage.close();
if (null != output)
{
try {
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
我在这里绘制矩形，当 openCamera():
时调用此方法
private void setUpCameraOutputs(int width, int height) {
Activity activity = getActivity();
CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE);
try {
for (String cameraId : manager.getCameraIdList()) {
CameraCharacteristics characteristics
= manager.getCameraCharacteristics(cameraId);
// We don't use a front facing camera in this sample.
Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING);
if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT) {
continue;
}
StreamConfigurationMap map = characteristics.get(
CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
if (map == null) {
continue;
}
// For still image captures, we use the largest available size.
Size largest = Collections.max(
Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)),
new CompareSizesByArea());
mImageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(),
ImageFormat.JPEG, /*maxImages*/1);
mImageReader.setOnImageAvailableListener(
mOnImageAvailableListener, mBackgroundHandler);
// Find out if we need to swap dimension to get the preview size relative to sensor
// coordinate.
int displayRotation = activity.getWindowManager().getDefaultDisplay().getRotation();
//noinspection ConstantConditions
mSensorOrientation = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
boolean swappedDimensions = false;
switch (displayRotation) {
case Surface.ROTATION_0:
case Surface.ROTATION_180:
if (mSensorOrientation == 90 || mSensorOrientation == 270) {
swappedDimensions = true;
}
break;
case Surface.ROTATION_90:
case Surface.ROTATION_270:
if (mSensorOrientation == 0 || mSensorOrientation == 180) {
swappedDimensions = true;
}
break;
default:
Log.e(TAG, "Display rotation is invalid: " + displayRotation);
}
Point displaySize = new Point();
activity.getWindowManager().getDefaultDisplay().getSize(displaySize);
int rotatedPreviewWidth = width;
int rotatedPreviewHeight = height;
int maxPreviewWidth = displaySize.x;
int maxPreviewHeight = displaySize.y;
if (swappedDimensions) {
rotatedPreviewWidth = height;
rotatedPreviewHeight = width;
maxPreviewWidth = displaySize.y;
maxPreviewHeight = displaySize.x;
}
if (maxPreviewWidth > MAX_PREVIEW_WIDTH) {
maxPreviewWidth = MAX_PREVIEW_WIDTH;
}
if (maxPreviewHeight > MAX_PREVIEW_HEIGHT) {
maxPreviewHeight = MAX_PREVIEW_HEIGHT;
}
// Danger, W.R.! Attempting to use too large a preview size could exceed the camera
// bus' bandwidth limitation, resulting in gorgeous previews but the storage of
// garbage capture data.
mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class),
rotatedPreviewWidth, rotatedPreviewHeight, maxPreviewWidth,
maxPreviewHeight, largest);
// We fit the aspect ratio of TextureView to the size of preview we picked.
int orientation = getResources().getConfiguration().orientation;
if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
mTextureView.setAspectRatio(
mPreviewSize.getWidth(), mPreviewSize.getHeight());
} else {
mTextureView.setAspectRatio(
mPreviewSize.getHeight(), mPreviewSize.getWidth());
}
// Add rectangle to the view
Rectangle rectangle = new Rectangle(getActivity(), mPreviewSize.getHeight(), mPreviewSize.getWidth());
linearLayout.addView(rectangle);
// Check if the flash is supported.
Boolean available = characteristics.get(CameraCharacteristics.FLASH_INFO_AVAILABLE);
mFlashSupported = available == null ? false : available;
mCameraId = cameraId;
return;
}
} catch (CameraAccessException e) {
e.printStackTrace();
} catch (NullPointerException e) {
// Currently an NPE is thrown when the Camera2API is used but not supported on the
// device this code runs.
ErrorDialog.newInstance(getString(R.string.camera_error))
.show(getChildFragmentManager(), FRAGMENT_DIALOG);
}
}
堆栈跟踪
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_0_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_0_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_1_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_1_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_3_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_3_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_4_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_4_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_5_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_5_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_6_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_6_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_7_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_7_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_8_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_8_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_9_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_9_apk.apk@classes.dex) because non-0 exit status
W/System: ClassLoader referenced unknown path: /data/app/com.example.googlecamera2-1/lib/arm
I/InstantRun: starting instant run server: is main process
W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
D/TextView: setTypeface with style : 0
D/ViewRootImpl: #1 mView = com.android.internal.policy.PhoneWindow$DecorView{bb95551 I.E...... R.....ID 0,0-0,0}
D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
D/libEGL: loaded /vendor/lib/egl/libGLES_mali.so
D/libEGL: eglInitialize EGLDisplay = 0xe0f717c4
I/OpenGLRenderer: Initialized EGL, version 1.4
D/mali_winsys: new_window_surface returns 0x3000, [720x1280]-format:1
I/CameraManagerGlobal: Connecting to camera service
I/CameraManager: Using legacy camera HAL.
D/libGLESv1: DTS_GLAPI : DTS is not allowed for Package : com.example.googlecamera2
I/CameraDeviceState: Legacy camera service transitioning to state CONFIGURING
I/RequestThread-0: Configure outputs: 2 surfaces configured.
D/Camera: app passed NULL surface
I/RequestThread-0: configureOutputs - set take picture size to 4128x3096
D/libEGL: eglInitialize EGLDisplay = 0xddaff404
D/mali_winsys: new_window_surface returns 0x3000, [960x720]-format:1
I/CameraDeviceState: Legacy camera service transitioning to state IDLE
I/RequestQueue: Repeating capture request set.
W/LegacyRequestMapper: convertRequestMetadata - control.awbRegions setting is not supported, ignoring value
Only received metering rectangles with weight 0.
D/ViewRootImpl: MSG_RESIZED_REPORT: ci=Rect(0, 0 - 0, 0) vi=Rect(0, 0 - 0, 0) or=1
W/LegacyRequestMapper: convertRequestToMetadata - Ignoring android.lens.focusDistance false, only 0.0f is supported
E/RECT: 720 960
I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@370aa78 time:79076526
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
I/CameraDeviceState: Legacy camera service transitioning to state CAPTURING
D/libEGL: eglInitialize EGLDisplay = 0xe0f71614
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xe0f71614
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/ViewRootImpl: ViewPostImeInputStage processPointer 0
D/ViewRootImpl: ViewPostImeInputStage processPointer 1
W/LegacyRequestMapper: convertRequestMetadata - control.awbRegions setting is not supported, ignoring value
Only received metering rectangles with weight 0.
convertRequestToMetadata - Ignoring android.lens.focusDistance false, only 0.0f is supported
W/LegacyRequestMapper: convertRequestMetadata - control.awbRegions setting is not supported, ignoring value
Only received metering rectangles with weight 0.
convertRequestToMetadata - Ignoring android.lens.focusDistance false, only 0.0f is supported
I/RequestQueue: Repeating capture request cancelled.
I/RequestThread-0: Flushing all pending requests.
E/RequestQueue: cancel failed: no repeating request exists.
I/CameraDeviceState: Legacy camera service transitioning to state IDLE
W/LegacyRequestMapper: convertRequestMetadata - control.awbRegions setting is not supported, ignoring value
Only received metering rectangles with weight 0.
W/LegacyRequestMapper: convertRequestToMetadata - Ignoring android.lens.focusDistance false, only 0.0f is supported
I/CameraDeviceState: Legacy camera service transitioning to state CAPTURING
I/RequestThread-0: Received jpeg.
Producing jpeg buffer...
D/ImageReader_JNI: ImageReader_lockedImageSetup: Receiving JPEG in HAL_PIXEL_FORMAT_RGBA_8888 buffer.
I/CameraDeviceState: Legacy camera service transitioning to state IDLE
D/libEGL: eglTerminate EGLDisplay = 0xddaff384
D/libEGL: eglTerminate EGLDisplay = 0xddaff49c
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
[SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
[SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
[SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] setBufferCount: BufferQueue has been abandoned
I/Timeline: Timeline: Activity_launch_request id:com.example.googlecamera2 time:79081932
A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0xdba03ff8 in tid 14345 (CameraBackgroun)
Application terminated.
我不明白那个SIGSEGV错误到底是怎么回事。它大部分时间都会出现，但并非总是如此。
所以，我终于自己弄明白了。
问题是我在相机预览上绘制的 overlay。
当我关闭摄像头并尝试离开 activity 时，preview size 变量可能已被破坏，因此 canvas 无法访问它所必需的宽度和高度绘制叠加层。
所以我只需要在 Rectangle class 中退出 onDraw()，如果相机被关闭并解决了问题。
我通过将一个简单的布尔变量传递给 Rectangle class 来实现这一点。如果设置为 false，则不绘制矩形。
在更改 activity 之前，我只是将 camerOn 设置为 false，然后调用 onDraw()，它只是返回而不绘制矩形，因为变量是false 并且 SIGSEGV 异常已排序。
我已将 Google 中的示例代码用于 Camera2 API - Camera2 API sample code
我还在相机预览上添加了一个矩形叠加层。当我尝试导航到下一个 activity 以显示捕获的图像时，出现 SIGSEGV 错误。
我认为问题的产生是因为Canvas。我不确定，但这里的一些答案表明这可能是问题所在，因为我在开始下一个意图之前关闭相机 activity.
canvas是使用Preview的宽度和高度来绘制矩形。这可能是我关闭 Camera 对象时的问题吗？
Rectangle.java
package com.example.googlecamera2;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.Log;
import android.view.View;
public class Rectangle extends View {
Paint paint = new Paint();
Context context;
int width;
int height;
public Rectangle(Context context, int width, int height) {
super(context);
this.context = context;
this.width = width;
this.height = height;
}
@Override
public void onDraw(Canvas canvas) {
paint.setColor(Color.GREEN);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(6);
Log.e("RECT", width +" "+ height);
Rect rect = new Rect(width/8, height/8, 7*width/8, 7*height/8);
canvas.drawRect(rect, paint);
}
}
这是保存图像的方法调用
@Override
public void onImageAvailable(ImageReader reader) {
mBackgroundHandler.post(new ImageSaver(reader.acquireNextImage(), mFile));
closeCameraDevice();
startActivity(new Intent(getActivity(), DisplayImage.class).putExtra("IMAGE", mFile.getPath()));
}
};
这是ImageSaver方法
private class ImageSaver implements Runnable {
/**
* The JPEG image
*/
private final Image mImage;
/**
* The file we save the image into.
*/
private final File mFile;
ImageSaver(Image image, File file) {
mImage = image;
mFile = file;
}
@Override
public void run() {
// System.gc();
ByteBuffer buffer = mImage.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.remaining()];
buffer.get(bytes);
capturedImage = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
// Rectangle is drawn by dividing the preview in 8 dimensions and the rectangle starts
// on 2nd dimension and ends on 7th dimension so take 6 for dividing the width and height
int left = capturedImage.getWidth() / 8;
int top = capturedImage.getHeight() / 8;
int cropWidth = 6*left;
int cropHeight = 6*top;
Matrix rotationMatrix = new Matrix();
rotationMatrix.postRotate(90);
Log.e("Image dim", capturedImage.getWidth()+" "+capturedImage.getHeight());
Log.e("Crop dim", left+" "+top+" "+cropWidth+" "+cropHeight);
croppedImage = Bitmap.createBitmap(capturedImage, left, top, cropWidth, cropHeight, rotationMatrix, false);
//Destroy the original bitmap image
capturedImage.recycle();
FileOutputStream output = null;
try {
output = new FileOutputStream(mFile);
croppedImage.compress(Bitmap.CompressFormat.JPEG, 100, output);
output.flush();
}
catch (IOException e) {
e.printStackTrace();
} finally
{
mImage.close();
if (null != output)
{
try {
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
我在这里绘制矩形，当 openCamera():
private void setUpCameraOutputs(int width, int height) {
Activity activity = getActivity();
CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE);
try {
for (String cameraId : manager.getCameraIdList()) {
CameraCharacteristics characteristics
= manager.getCameraCharacteristics(cameraId);
// We don't use a front facing camera in this sample.
Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING);
if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT) {
continue;
}
StreamConfigurationMap map = characteristics.get(
CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
if (map == null) {
continue;
}
// For still image captures, we use the largest available size.
Size largest = Collections.max(
Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)),
new CompareSizesByArea());
mImageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(),
ImageFormat.JPEG, /*maxImages*/1);
mImageReader.setOnImageAvailableListener(
mOnImageAvailableListener, mBackgroundHandler);
// Find out if we need to swap dimension to get the preview size relative to sensor
// coordinate.
int displayRotation = activity.getWindowManager().getDefaultDisplay().getRotation();
//noinspection ConstantConditions
mSensorOrientation = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
boolean swappedDimensions = false;
switch (displayRotation) {
case Surface.ROTATION_0:
case Surface.ROTATION_180:
if (mSensorOrientation == 90 || mSensorOrientation == 270) {
swappedDimensions = true;
}
break;
case Surface.ROTATION_90:
case Surface.ROTATION_270:
if (mSensorOrientation == 0 || mSensorOrientation == 180) {
swappedDimensions = true;
}
break;
default:
Log.e(TAG, "Display rotation is invalid: " + displayRotation);
}
Point displaySize = new Point();
activity.getWindowManager().getDefaultDisplay().getSize(displaySize);
int rotatedPreviewWidth = width;
int rotatedPreviewHeight = height;
int maxPreviewWidth = displaySize.x;
int maxPreviewHeight = displaySize.y;
if (swappedDimensions) {
rotatedPreviewWidth = height;
rotatedPreviewHeight = width;
maxPreviewWidth = displaySize.y;
maxPreviewHeight = displaySize.x;
}
if (maxPreviewWidth > MAX_PREVIEW_WIDTH) {
maxPreviewWidth = MAX_PREVIEW_WIDTH;
}
if (maxPreviewHeight > MAX_PREVIEW_HEIGHT) {
maxPreviewHeight = MAX_PREVIEW_HEIGHT;
}
// Danger, W.R.! Attempting to use too large a preview size could exceed the camera
// bus' bandwidth limitation, resulting in gorgeous previews but the storage of
// garbage capture data.
mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class),
rotatedPreviewWidth, rotatedPreviewHeight, maxPreviewWidth,
maxPreviewHeight, largest);
// We fit the aspect ratio of TextureView to the size of preview we picked.
int orientation = getResources().getConfiguration().orientation;
if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
mTextureView.setAspectRatio(
mPreviewSize.getWidth(), mPreviewSize.getHeight());
} else {
mTextureView.setAspectRatio(
mPreviewSize.getHeight(), mPreviewSize.getWidth());
}
// Add rectangle to the view
Rectangle rectangle = new Rectangle(getActivity(), mPreviewSize.getHeight(), mPreviewSize.getWidth());
linearLayout.addView(rectangle);
// Check if the flash is supported.
Boolean available = characteristics.get(CameraCharacteristics.FLASH_INFO_AVAILABLE);
mFlashSupported = available == null ? false : available;
mCameraId = cameraId;
return;
}
} catch (CameraAccessException e) {
e.printStackTrace();
} catch (NullPointerException e) {
// Currently an NPE is thrown when the Camera2API is used but not supported on the
// device this code runs.
ErrorDialog.newInstance(getString(R.string.camera_error))
.show(getChildFragmentManager(), FRAGMENT_DIALOG);
}
}
堆栈跟踪
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_0_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_0_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_1_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_1_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_3_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_3_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_4_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_4_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_5_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_5_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_6_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_6_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_7_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_7_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_8_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_8_apk.apk@classes.dex) because non-0 exit status
W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --compiler-filter=speed --instruction-set-variant=cortex-a15 --instruction-set-features=default --dex-file=/data/app/com.example.googlecamera2-1/split_lib_slice_9_apk.apk --oat-file=/data/dalvik-cache/arm/data@app@com.example.googlecamera2-1@split_lib_slice_9_apk.apk@classes.dex) because non-0 exit status
W/System: ClassLoader referenced unknown path: /data/app/com.example.googlecamera2-1/lib/arm
I/InstantRun: starting instant run server: is main process
W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
D/TextView: setTypeface with style : 0
D/ViewRootImpl: #1 mView = com.android.internal.policy.PhoneWindow$DecorView{bb95551 I.E...... R.....ID 0,0-0,0}
D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
D/libEGL: loaded /vendor/lib/egl/libGLES_mali.so
D/libEGL: eglInitialize EGLDisplay = 0xe0f717c4
I/OpenGLRenderer: Initialized EGL, version 1.4
D/mali_winsys: new_window_surface returns 0x3000, [720x1280]-format:1
I/CameraManagerGlobal: Connecting to camera service
I/CameraManager: Using legacy camera HAL.
D/libGLESv1: DTS_GLAPI : DTS is not allowed for Package : com.example.googlecamera2
I/CameraDeviceState: Legacy camera service transitioning to state CONFIGURING
I/RequestThread-0: Configure outputs: 2 surfaces configured.
D/Camera: app passed NULL surface
I/RequestThread-0: configureOutputs - set take picture size to 4128x3096
D/libEGL: eglInitialize EGLDisplay = 0xddaff404
D/mali_winsys: new_window_surface returns 0x3000, [960x720]-format:1
I/CameraDeviceState: Legacy camera service transitioning to state IDLE
I/RequestQueue: Repeating capture request set.
W/LegacyRequestMapper: convertRequestMetadata - control.awbRegions setting is not supported, ignoring value
Only received metering rectangles with weight 0.
D/ViewRootImpl: MSG_RESIZED_REPORT: ci=Rect(0, 0 - 0, 0) vi=Rect(0, 0 - 0, 0) or=1
W/LegacyRequestMapper: convertRequestToMetadata - Ignoring android.lens.focusDistance false, only 0.0f is supported
E/RECT: 720 960
I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@370aa78 time:79076526
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
I/CameraDeviceState: Legacy camera service transitioning to state CAPTURING
D/libEGL: eglInitialize EGLDisplay = 0xe0f71614
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xe0f71614
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/libEGL: eglInitialize EGLDisplay = 0xddaff2f4
D/ViewRootImpl: ViewPostImeInputStage processPointer 0
D/ViewRootImpl: ViewPostImeInputStage processPointer 1
W/LegacyRequestMapper: convertRequestMetadata - control.awbRegions setting is not supported, ignoring value
Only received metering rectangles with weight 0.
convertRequestToMetadata - Ignoring android.lens.focusDistance false, only 0.0f is supported
W/LegacyRequestMapper: convertRequestMetadata - control.awbRegions setting is not supported, ignoring value
Only received metering rectangles with weight 0.
convertRequestToMetadata - Ignoring android.lens.focusDistance false, only 0.0f is supported
I/RequestQueue: Repeating capture request cancelled.
I/RequestThread-0: Flushing all pending requests.
E/RequestQueue: cancel failed: no repeating request exists.
I/CameraDeviceState: Legacy camera service transitioning to state IDLE
W/LegacyRequestMapper: convertRequestMetadata - control.awbRegions setting is not supported, ignoring value
Only received metering rectangles with weight 0.
W/LegacyRequestMapper: convertRequestToMetadata - Ignoring android.lens.focusDistance false, only 0.0f is supported
I/CameraDeviceState: Legacy camera service transitioning to state CAPTURING
I/RequestThread-0: Received jpeg.
Producing jpeg buffer...
D/ImageReader_JNI: ImageReader_lockedImageSetup: Receiving JPEG in HAL_PIXEL_FORMAT_RGBA_8888 buffer.
I/CameraDeviceState: Legacy camera service transitioning to state IDLE
D/libEGL: eglTerminate EGLDisplay = 0xddaff384
D/libEGL: eglTerminate EGLDisplay = 0xddaff49c
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
eglTerminate EGLDisplay = 0xddaff424
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
[SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
[SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
[SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] cancelBuffer: BufferQueue has been abandoned
E/BufferQueueProducer: [SurfaceTexture-1-14265-1] setBufferCount: BufferQueue has been abandoned
I/Timeline: Timeline: Activity_launch_request id:com.example.googlecamera2 time:79081932
A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0xdba03ff8 in tid 14345 (CameraBackgroun)
Application terminated.
我不明白那个SIGSEGV错误到底是怎么回事。它大部分时间都会出现，但并非总是如此。
所以，我终于自己弄明白了。
问题是我在相机预览上绘制的 overlay。
当我关闭摄像头并尝试离开 activity 时，preview size 变量可能已被破坏，因此 canvas 无法访问它所必需的宽度和高度绘制叠加层。
所以我只需要在 Rectangle class 中退出 onDraw()，如果相机被关闭并解决了问题。
我通过将一个简单的布尔变量传递给 Rectangle class 来实现这一点。如果设置为 false，则不绘制矩形。
在更改 activity 之前，我只是将 camerOn 设置为 false，然后调用 onDraw()，它只是返回而不绘制矩形，因为变量是false 并且 SIGSEGV 异常已排序。