我想用攝像頭api2來捕捉圖像。該代碼在MOTO g4上運行良好,但是當我在NEXUS 6上測試代碼時,onImageAvailable在session.capture之後未被調用,並且沒有保存圖像。真的很沮喪,非常感謝,如果有人可以幫助!非常感謝。android camera2 api - onImageAvailable在session.capture之後不會被調用
ImageReader reader = ImageReader.newInstance(width, height, ImageFormat.JPEG, 1);
List<Surface> outputSurfaces = new ArrayList<Surface>(2);
outputSurfaces.add(reader.getSurface());
outputSurfaces.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);
// Orientation
int rotation = getWindowManager().getDefaultDisplay().getRotation();
captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));
sendUri = getImageUri();
final File file = new File(Environment.getExternalStorageDirectory()+"/" + sendUri +".jpg");
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();
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 output = null;
try {
output = new FileOutputStream(file);
output.write(bytes);
} finally {
if (null != output) {
output.close();
}
}
}
};
reader.setOnImageAvailableListener(readerListener, mBackgroundHandler);
final CameraCaptureSession.CaptureCallback captureListener = new CameraCaptureSession.CaptureCallback() {
@Override
public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) {
super.onCaptureCompleted(session, request, result);
//Toast.makeText(MainActivity.this, "Saved:" + file, Toast.LENGTH_SHORT).show();
toast1("Saved:"+file);
//createCameraPreview();
}
};
cameraDevice.createCaptureSession(outputSurfaces, new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(CameraCaptureSession session) {
try {
session.capture(captureBuilder.build(), captureListener, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
@Override
public void onConfigureFailed(CameraCaptureSession session) {
}
}, mBackgroundHandler);
} catch (CameraAccessException e) {
e.printStackTrace();
}
下面是承上啓下6輸出的完整的logcat運行相機功能時,似乎沒有什麼用處...
03-07 13:04:34.526 1838-1838/examples.hello E/AndroidCameraApi: is camera open
03-07 13:04:34.527 1838-1838/examples.hello I/CameraManagerGlobal: Connecting to camera service
03-07 13:04:34.659 1838-1838/examples.hello E/AndroidCameraApi: openCamera X
03-07 13:04:34.694 1838-1838/examples.hello E/AndroidCameraApi: onOpened
03-07 13:04:34.722 1838-1883/examples.hello D/OpenGLRenderer: endAllActiveAnimators on 0x931bee80 (RippleDrawable) with handle 0x92c2cea0
03-07 13:04:43.952 1838-1838/examples.hello E/AndroidCameraApi: onPause
謝謝!我正在使用的nexus 6正在運行android版本7.0。我認爲它應該能夠支持camera2 api。 – song
我認爲android.camera2 API會受到指責。複合這個問題的事實是這個API不支持低於21的任何API級別。許多攝像頭應用程序仍然使用棄用的Camera API。 –