我正在使用camera2 api来捕获图像并在thumnail中显示。所有设备都工作正常，但是当使用Micromax Q382设备时，然后在thumnail中预览其显示的黑色图像。我发现以下问题
Unable to acquire a lockedBuffer, very likely client tries to lock more than maxImages buffers
我正在使用下面的代码进行捕获侦听器回调
final CameraCaptureSession.CaptureCallback captureListener = new CameraCaptureSession.CaptureCallback()
{
@Override
public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request,
TotalCaptureResult result)
{
super.onCaptureCompleted(session, request, result);
startPreview();
}
};
mCameraDevice.createCaptureSession(outputSurfaces, new CameraCaptureSession.StateCallback()
{
@Override
public void onConfigured(CameraCaptureSession session)
{
try {
session.capture(captureBuilder.build(), captureListener, backgroudHandler);
} catch (CameraAccessException e) {
AppLogger.exception(myContext, getClass().getSimpleName(), e);
// e.printStackTrace();
}
}
@Override
public void onConfigureFailed(CameraCaptureSession session)
{
}
}, backgroudHandler);
} catch (CameraAccessException e) {
AppLogger.exception(myContext, getClass().getSimpleName(), e);
// e.printStackTrace();
}
下面的代码用于onImageAvailableListener
ImageReader.OnImageAvailableListener readerListener = new ImageReader.OnImageAvailableListener()
{
@Override
public void onImageAvailable(ImageReader reader)
{
Image image = null;
try {
image = reader.acquireLatestImage();
// ByteBuffer buffer = image.getPlanes()[0].getBuffer();
// final byte[] bytes = new byte[buffer.capacity()];
ByteBuffer buffer = image.getPlanes()[0].getBuffer();
final byte[] bytes = new byte[buffer.remaining()];
buffer.get(bytes);
save(bytes);
buffer.clear();
runOnUiThread(new Runnable()
{
@Override
public void run()
{
mThumbnail.setVisibility(View.VISIBLE);
filePathLabel.setVisibility(View.VISIBLE);
filePathValue.setText(file.getAbsolutePath());
Bitmap bmp =
UtilityMethods.getScaledBitmap(CameraImageTestActivityLoliipop.this, bytes);
mThumbnail.setImageBitmap(bmp);
}
});
} catch (FileNotFoundException e) {
AppLogger.exception(myContext, getClass().getSimpleName(), e);
// e.printStackTrace();
} catch (IOException e) {
AppLogger.exception(myContext, getClass().getSimpleName(), e);
// e.printStackTrace();
} finally {
if (image != null) {
image.close();
}
}
}
最佳答案
您可以为方法提供参数maxImages作为1。ImageReader.newInstance在关闭唯一一个图像缓冲区之前调用acquireLatestImage，这将导致此警告。
在这种情况下使用acquireNextSurfaceImage。如果acquireNextImage大于maxImages，1不存在此问题。