CAMER API

                                              CAMERA API

 

 MAKE OWN CAMERA APP:-

                                         









                                                 

TAKE PICTURE :-

 if (cameraDevice == 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);

                //Capture image with custom size
                int width = 490;
                int height = 250;
                if (jpegSizes != null && jpegSizes.length > 0) {
                    width = jpegSizes[05].getWidth();
                    height = jpegSizes[0].getHeight();
                }
                final ImageReader reader = ImageReader.newInstance(width, height, ImageFormat.JPEG, 1);
                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 orientation base on device
                int rotation = getWindowManager().getDefaultDisplay().getRotation();
                captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));

                file = new File(Environment.getExternalStorageDirectory() + "/DCIM/neo/".concat("img_neo_").concat(UUID.randomUUID().toString()).concat(".JPEG"));
                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);
                            outputStream.write(bytes);
                        } 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(MainActivity.this, "Saved " + file, Toast.LENGTH_SHORT).show();
                        createCameraPreview();
                    }
                };

                cameraDevice.createCaptureSession(outputSurface, new CameraCaptureSession.StateCallback() {

                    @Override

                    public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
                        try {
                            cameraCaptureSession.capture(captureBuilder.build(), captureListener, mBackgroundHandler);
                        } catch (CameraAccessException e) {
                            e.printStackTrace();
                        }
                    }

                    @Override
                    public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {

                    }
                }, mBackgroundHandler);


            } catch (CameraAccessException e) {
                e.printStackTrace();
            }

 UPADTA PRVIEW :

   <CODE>

 

 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) {
         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) {
         

OPEN CAMERA

    <CODE>

 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];
            //Check realtime permission if run higher API 23
            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();
        }

THIS CODE PAST IN ONCREATE 

<CODE>

 

    TextureView.SurfaceTextureListener textureListener = new TextureView.SurfaceTextureListener() {

        @Override

        public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int i, int i1) {

            openCamera();

        }

        @Override

        public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int i, int i1) {

        }

        @Override

        public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {

            return false;

        }

        @Override

        public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {

        }

    };

 THIS CODE PAST IN ON RESUME 

<CODE>

 @Override
    protected void onResume() {
        super.onResume();
        startBackgroundThread();
        if (textureView.isAvailable())
            openCamera();
        else {
            textureView.setSurfaceTextureListener(textureListener);
       }
    }

  THIS CODE PAST IN ONPAUSE

 <CODE>

    @Override
    protected void onPause() {
        stopBackgroundThread();
        super.onPause();
    } 

                                                                           FULL CODE

 package api.camer.com.istone.neo.camera.cameraapi;

import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
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.Build;
import android.os.Environment;
import android.os.Handler;
import android.os.HandlerThread;
import android.provider.ContactsContract;
import android.support.annotation.NonNull;
import android.support.annotation.RequiresApi;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Size;
import android.util.SparseIntArray;
import android.view.Surface;
import android.view.TextureView;
import android.view.View;
import android.widget.Button;
import android.widget.HorizontalScrollView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;

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.List;
import java.util.UUID;


public class MainActivity extends Activity {

    private Button btnCapture;
    private TextureView textureView;
    private ImageView gll;
    private RecyclerView rview;
    private LinearLayout gallcode2;
    private LinearLayout camera_background;
    private ImageView back_btn;

    private File mFolder = new File("/storage/emulated/0/DCIM/neo");

    private SharedPreferences backpressd;
    //Check state orientation of output image
    private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
    static{
        ORIENTATIONS.append(Surface.ROTATION_90,0);
        ORIENTATIONS.append(Surface.ROTATION_0,90);
        ORIENTATIONS.append(Surface.ROTATION_270,180);
        ORIENTATIONS.append(Surface.ROTATION_180,270);
    }

    private String cameraId;
    private CameraDevice cameraDevice;
    private CameraCaptureSession cameraCaptureSessions;
    private CaptureRequest.Builder captureRequestBuilder;
    private Size imageDimension;
    private ImageReader imageReader;

    //Save to FILE
    private File file;
    private static final int REQUEST_CAMERA_PERMISSION = 200;
    private boolean mFlashSupported;
    private Handler mBackgroundHandler;
    private HandlerThread mBackgroundThread;

    CameraDevice.StateCallback stateCallback = new CameraDevice.StateCallback() {
        @Override
        public void onOpened(@NonNull CameraDevice camera) {
            cameraDevice = camera;
            createCameraPreview();
        }

        @Override
        public void onDisconnected(@NonNull CameraDevice cameraDevice) {
            cameraDevice.close();
        }

        @Override
        public void onError(@NonNull CameraDevice cameraDevice, int i) {
            cameraDevice.close();
            cameraDevice= null;
        }
    };


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        textureView = (TextureView)findViewById(R.id.camera);
        btnCapture = (Button)findViewById(R.id.capture);

        //From Java 1.4 , you can use keyword 'assert' to check expression true or false
       assert textureView != null;
       textureView.setSurfaceTextureListener(textureListener);
       btnCapture.setOnClickListener(new View.OnClickListener() {
           @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
           @Override
           public void onClick(View view) {
               takePicture();
           }
       });
       @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    private void takePicture() {
            if (cameraDevice == 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);

                //Capture image with custom size
                int width = 490;
                int height = 250;
                if (jpegSizes != null && jpegSizes.length > 0) {
                    width = jpegSizes[05].getWidth();
                    height = jpegSizes[0].getHeight();
                }
                final ImageReader reader = ImageReader.newInstance(width, height, ImageFormat.JPEG, 1);
                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 orientation base on device
                int rotation = getWindowManager().getDefaultDisplay().getRotation();
                captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));

                file = new File(Environment.getExternalStorageDirectory() + "/DCIM/neo/".concat("img_neo_").concat(UUID.randomUUID().toString()).concat(".JPEG"));
                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);
                            outputStream.write(bytes);
                        } 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(MainActivity.this, "Saved " + file, Toast.LENGTH_SHORT).show();
                        createCameraPreview();
                    }
                };

                cameraDevice.createCaptureSession(outputSurface, new CameraCaptureSession.StateCallback() {
                    @Override
                    public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
                        try {
                            cameraCaptureSession.capture(captureBuilder.build(), captureListener, mBackgroundHandler);
                        } catch (CameraAccessException e) {
                            e.printStackTrace();
                        }
                    }

                    @Override
                    public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {

                    }
                }, mBackgroundHandler);


            } catch (CameraAccessException e) {
                e.printStackTrace();
            }

        }

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    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(MainActivity.this, "Changed", Toast.LENGTH_SHORT).show();
                }
            },null);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    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();
        }
    }


    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    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];
            //Check realtime permission if run higher API 23
            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();
        }
    }

    TextureView.SurfaceTextureListener textureListener = new TextureView.SurfaceTextureListener() {
        @Override
        public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int i, int i1) {
            openCamera();
        }

        @Override
        public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int i, int i1) {

        }

        @Override
        public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
            return false;
        }

        @Override
        public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {

        }
    };

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if(requestCode == REQUEST_CAMERA_PERMISSION)
        {
            if(grantResults[0] != PackageManager.PERMISSION_GRANTED)
            {
                Toast.makeText(this, "You can't use camera without permission", Toast.LENGTH_SHORT).show();
                finish();
            }
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        startBackgroundThread();
        if (textureView.isAvailable())
            openCamera();
        else {
            textureView.setSurfaceTextureListener(textureListener);
       }
    }

    @Override
    protected void onPause() {
        stopBackgroundThread();
        super.onPause();
    }

    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
    private void stopBackgroundThread() {
        mBackgroundThread.quitSafely();
        try{
            mBackgroundThread.join();
            mBackgroundThread= null;
            mBackgroundHandler = null;
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    private void startBackgroundThread() {
        mBackgroundThread = new HandlerThread("Camera Background");
        mBackgroundThread.start();
        mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
    }
    }

  }