相机连拍

import android.content.Context;
import android.content.pm.PackageManager;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.os.Bundle;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.FrameLayout;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";
    public static final int MEDIA_TYPE_IMAGE = 1;
    public static final int MEDIA_TYPE_VIDEO = 2;
    private Camera mCamera;
    private CameraPreview mPreview;

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

        // Create an instance of Camera
        mCamera = getCameraInstance();
        // Create our Preview view and set it as the content of our activity.
        mPreview = new CameraPreview(this, mCamera);
        FrameLayout preview = (FrameLayout) findViewById(R.id.fl);
        preview.addView(mPreview);
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (mCamera != null) {
            mCamera.release(); // release the camera for other applications
            mCamera = null;
        }
    }

    /**
     * A safe way to get an instance of the Camera object.
     */
    public static Camera getCameraInstance() {
        Camera c = null;
        try {
            c = Camera.open(); // attempt to get a Camera instance
        } catch (Exception e) {
            // Camera is not available (in use or does not exist)
        }
        return c; // returns null if camera is unavailable
    }

    private Camera.PictureCallback mPicture = new Camera.PictureCallback() {
        @Override
        public void onPictureTaken(byte[] data, Camera camera) {
            File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
            //File pictureFile = new File("/sdcard/1.jpg");
            if (pictureFile == null) {
                Log.d(TAG, "Error creating media file, check storage permissions: ");
                return;
            }
            try {
                FileOutputStream fos = new FileOutputStream(pictureFile);
                fos.write(data);
                fos.close();
            } catch (FileNotFoundException e) {
                Log.d(TAG, "File not found: " + e.getMessage());
            } catch (IOException e) {
                Log.d(TAG, "Error accessing file: " + e.getMessage());
            } finally {
                mCamera.startPreview();
            }
        }
    };

    /**
     * Create a File for saving an image or video
     */
    private static File getOutputMediaFile(int type) {
        // To be safe, you should check that the SDCard is mounted
        // using Environment.getExternalStorageState() before doing this.
        File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_PICTURES), "MyCameraApp");
        // This location works best if you want the created images to be shared
        // between applications and persist after your app has been uninstalled.
        // Create the storage directory if it does not exist
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                Log.d("MyCameraApp", "failed to create directory");
                return null;
            }
        }
        // Create a media file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        File mediaFile;
        if (type == MEDIA_TYPE_IMAGE) {
            mediaFile = new File(mediaStorageDir.getPath() + File.separator +
                    "IMG_" + timeStamp + ".jpg");

        } else if (type == MEDIA_TYPE_VIDEO) {
            mediaFile = new File(mediaStorageDir.getPath() + File.separator +
                    "VID_" + timeStamp + ".mp4");
        } else {
            return null;
        }
        return mediaFile;
    }

    public void click(View view) throws Exception {
        mCamera.autoFocus(new Camera.AutoFocusCallback() {
            @Override
            public void onAutoFocus(boolean b, Camera camera) {
                mCamera.takePicture(null, null, mPicture);
            }
        });
    }


//    private void initCamera() {
//        if (mCamera != null) {
//            try {
//                Camera.Parameters parameters = mCamera.getParameters();
//                parameters.setPictureFormat(PixelFormat.JPEG);
//                parameters.setPictureSize(1024, 768);
//                mCamera.setParameters(parameters);
//                /* 开启预览画面 */
//                mCamera.startPreview();
//                Log.i(TAG, "init camera!!!!!!------");
//            } catch (Exception e) {
//                e.printStackTrace();
//            }
//        }
//    }

    /**
     * Check if this device has a camera
     */
//    private boolean checkCameraHardware(Context context) {
//        if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
//            // this device has a camera
//            return true;
//        } else {
//            // no camera on this device
//            return false;
//        }
//    }

//    private Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
//        @Override
//        public void onPictureTaken(byte[] data, Camera camera) {
//            mCamera.startPreview();//重新开始预览
//        }
//    };
}

 

    <uses-permission android:name="android.permission.CAMERA"></uses-permission>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-feature android:name="android.hardware.camera"/>