Camera in Android app - android-camera

Question

I am creating an app which required to perform from API 15 to API 23 using camera so what should be the best way to implement camera as camera class is deprecated in API 21 and also android.hardware.camera2 not able to implement on lower version then API 21.

Answer 1

The below code is something I have taken out of one of my projects, it has had a lot of stuff ripped out for the purpose of putting it on here so you will have to edit it for your needs. It uses the original camera api which is back compatible for your api needs.
public class RecordGameKam extends Fragment
implements TextureView.SurfaceTextureListener, View.OnClickListener {
private final static String TAG = "CameraRecordTexture";
private Camera mCamera;
private TextureView mTextureView;
int numberOfCameras;
int defaultCameraId;
private boolean isRecording = false;
protected MediaRecorder mediaRecorder;
#SuppressWarnings("ConstantConditions")
#TargetApi(Build.VERSION_CODES.JELLY_BEAN)
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
getActivity().getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
View rootView = new RelativeLayout(getActivity());
mTextureView = new TextureView(getActivity());
mTextureView.setSurfaceTextureListener(this);
//View parameters-----------------------------------------------------------------------
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
rootView.setLayoutParams(params);
((ViewGroup) rootView).addView(mTextureView);
return rootView;
}
#Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
mCamera = Camera.open(Camera.CameraInfo.CAMERA_FACING_FRONT);
// Find the total number of cameras available
numberOfCameras = Camera.getNumberOfCameras();
// Find the ID of the default camera
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
for (int i = 0; i < numberOfCameras; i++) {
Camera.getCameraInfo(i, cameraInfo);
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
defaultCameraId = i;
}
}
try {
if (mCamera != null) {
//final Camera.Size previewSize = onMeasure();
//Camera.Size recorderSize = previewSize;
final Camera.Parameters params = mCamera.getParameters();
params.setPreviewSize(720, 480);
mCamera.setParameters(params);
mCamera.setDisplayOrientation(90);
mCamera.setPreviewTexture(surface);
mCamera.startPreview();
startContinuousAutoFocus();
}
} catch (IOException ioe) {
// Something bad happened
mCamera.release();
mCamera = null;
}
}
#Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
// Ignored, Camera does all the work for us
}
#Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
try {
if (getActivity().getActionBar() != null) {
getActivity().getActionBar().show();
}
} catch (Exception e) {
e.printStackTrace();
}
releaseMediaRecorder();
return true;
}
#Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
// Invoked every time there's a new Camera preview frame
}
private boolean setMediaRecorder() throws IllegalStateException {
try {
//Create a new instance of MediaRecorder.
mediaRecorder = new MediaRecorder();
//Unlock and set camera to Media recorder
mCamera.unlock();
mediaRecorder.setCamera(mCamera);
//Configure audio/video input
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
CamcorderProfile profile = null;
if (CamcorderProfile.hasProfile(CamcorderProfile.QUALITY_480P)) {
profile = CamcorderProfile.get(CamcorderProfile.QUALITY_480P);
}
if (profile != null) {
mediaRecorder.setProfile(profile);
}
//Change oritentation
mediaRecorder.setOrientationHint(90 - 180 + 360);
mediaRecorder.setOutputFile(getFilename());
} catch (Exception e) {
e.printStackTrace();
}
//Attempt to prepare the configuration and record video.
try {
button.setBackgroundResource(R.drawable.camera_pressed);
mediaRecorder.prepare();
} catch (Exception e) {
e.printStackTrace();
mediaRecorder.release();
return false;
}
return true;
}
boolean startContinuousAutoFocus() {
Camera.Parameters params = mCamera.getParameters();
List<String> focusModes = params.getSupportedFocusModes();
assert focusModes != null;
String CAF_PICTURE = Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE,
CAF_VIDEO = Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO,
supportedMode = focusModes
.contains(CAF_PICTURE) ? CAF_PICTURE : focusModes
.contains(CAF_VIDEO) ? CAF_VIDEO : "";
if (!supportedMode.equals("")) {
params.setFocusMode(supportedMode);
mCamera.setParameters(params);
return true;
}
return false;
}
#Override
public void onResume() {
super.onResume();
}
#Override
public void onPause() {
super.onPause();
}
#Override
public void onDestroy() {
super.onDestroy();
}
}
enter code here