Android open camera from button

问题:

I hope this isn't a duplicate question but I am making an app that I want a button to open the camera app (the default android camera separately). How do I got about doing that? I know there is a function:

intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE)

Do I need to use that? And how do I call the button from the xml file?

Also do I need to worry about storing that picture or video or will the default camera app take care of that?

回答1:

To call the camera you can use:

Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
startActivity(intent);

The image will be automatically saved in a default directory.

And you need to set the permission for the camera in your AndroidManifest.xml:

<uses-permission android:name="android.permission.CAMERA"> </uses-permission>

回答2:

 Button b = (Button)findViewById(R.id.Button01);

    b.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
             Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
             startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
        }
    });
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == CAMERA_PIC_REQUEST) {
          Bitmap image = (Bitmap) data.getExtras().get("data");
          ImageView imageview = (ImageView) findViewById(R.id.ImageView01); //sets imageview as the bitmap
          imageview.setImageBitmap(image);
    }
}

回答3:

You can create a camera intent and call it as startActivityForResult(intent).

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

   // start the image capture Intent
startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);

回答4:

I know it is a bit late of a reply but you can use the below syntax as it worked with me just fine

Camera=(Button)findViewById(R.id.CameraID);
Camera.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Intent Intent3=new   Intent(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA);
            startActivity(Intent3); 
        }
    });

回答5:

For me this worked perfectly fine .

 Intent intent=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
 startActivity(intent);

and add this permission to mainfest file:

<uses-permission android:name="android.permission.CAMERA">

It opens the camera,after capturing the image it saves the image to gallery with a new image set.

回答6:

the below code does exactly what you want

//use this intent on click event

Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); startActivityForResult(cameraIntent,CAMERA_REQUEST);

// the above code is used in 'on activity Result'

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    super.onActivityResult(requestCode, resultCode, data);
    callbackManager.onActivityResult(requestCode, resultCode, data);

    if (requestCode == CAMERA_REQUEST) {
        Bitmap photo = (Bitmap) data.getExtras().get("data");
        image.setImageBitmap(photo);
    }
}

回答7:

You are correct about the action used in Intent but it's not the only thing you have to do. You'll also have to add

startActivityForResult(intent, YOUR_REQUEST_CODE);

To get it all done and retrieve the actual picture you could check the following thread.

Android - Capture photo

回答8:

you can use the following code

         Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);

                pic = new File(Environment.getExternalStorageDirectory(),
                        mApp.getPreference().getString(Common.u_id, "") + ".jpg");

                picUri = Uri.fromFile(pic);

                cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, picUri);

                cameraIntent.putExtra("return-data", true);
                startActivityForResult(cameraIntent, PHOTO);

回答9:

I have created a libray for pick image from camera or galley and cropping also

Try this,

ImagePro.Java

public class ImagePro
{
    public static String TAG = "ImagePro";
    Activity activity;
    Uri mImageCaptureUri;
    public static int CAMERA_CODE = 64;
    public static int GALLERY_CODE = 74;
    public static int CROPPING_CODE = 84;
    private final static int REQUEST_PERMISSION_REQ_CODE = 704;

    public ImagePro(Activity activity) {

        this.activity = activity;
        this.outPutFile = new File(android.os.Environment.getExternalStorageDirectory(), "temp.jpg");

        if (ContextCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {

            ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_PERMISSION_REQ_CODE);
        }
    }

    private void LogToast(String message) {

        try {
            Toast.makeText(activity, message, Toast.LENGTH_SHORT).show();
        } catch (Exception e) {
            e.printStackTrace();
        }

        Log.d(TAG, message);
    }

    private void Toast(String message) {

        try {
            Toast.makeText(activity, message, Toast.LENGTH_SHORT).show();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void Log(String message) {

        Log.d(TAG, message);
    }

    /**
     * This function return captured image path
     *
     * @param requestCode on activity result requestCode
     * @param resultCode on activity result resultCode
     * @param intent on activity result intent
     * @return ImageDetails values
     */
    public ImageDetails getImagePath(int requestCode, int resultCode, Intent intent) {

        ImageDetails imageDetails = new ImageDetails();

        if(resultCode == Activity.RESULT_OK) {

            if(requestCode == CAMERA_CODE) {
                imageDetails.setUri(mImageCaptureUri);
                imageDetails.setPath(mImageCaptureUri.getPath());
                Bitmap bitmap = null;

                try {
                    bitmap = MediaStore.Images.Media.getBitmap(activity.getContentResolver(), mImageCaptureUri);
                } catch (IOException e) {
                    LogToast(e.getMessage());
                    e.printStackTrace();
                }
                imageDetails.setBitmap(bitmap);
                imageDetails.setFile(new File(mImageCaptureUri.getPath()));

            } else if(requestCode == GALLERY_CODE) {

                Uri uri = intent.getData();

                imageDetails.setUri(uri);
                Bitmap bitmap = null;

                try {
                    bitmap = MediaStore.Images.Media.getBitmap(activity.getContentResolver(), uri);
                } catch (IOException e) {
                    LogToast(e.getMessage());
                    e.printStackTrace();
                }

                imageDetails.setBitmap(bitmap);
                imageDetails.setFile(new File(uri.getPath()));
                imageDetails.setPath(uri.getPath());

            } else if(requestCode == CROPPING_CODE) {
                try {
                    if(outPutFile.exists()){

                        imageDetails.setUri(Uri.fromFile(outPutFile));
                        imageDetails.setFile(outPutFile);
                        imageDetails.setPath(outPutFile.getPath());
                        Bitmap photo = decodeFile(outPutFile);
                        imageDetails.setBitmap(photo);
                    }
                    else {
                        LogToast("Error while save image");
                    }
                } catch (Exception e) {

                    e.printStackTrace();
                    LogToast(e.getMessage());
                }
            }

        } else {
            LogToast("user cancelled.");
        }

        return imageDetails;
    }

    /**
     * Open image pick dialog.<br/>
     * CAMERA_CODE</br>
     * GALLERY_CODE
     */
    public void openImagePickOption() {

        final CharSequence[] items = { "Capture Photo", "Choose from Gallery", "Cancel" };

        AlertDialog.Builder builder = new AlertDialog.Builder(activity);
        builder.setTitle("Add Photo!");
        builder.setItems(items, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int item) {

                if (items[item].equals("Capture Photo")) {

                    captureImage();

                } else if (items[item].equals("Choose from Gallery")) {

                    pickImage();

                } else if (items[item].equals("Cancel")) {
                    dialog.dismiss();
                }
            }
        });
        builder.show();
    }

    /**
     * decode from file to bitmap
     * @param f file
     * @return Bitmap data
     */
    private Bitmap decodeFile(File f) {
        try {
            // decode image size
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inJustDecodeBounds = true;
            BitmapFactory.decodeStream(new FileInputStream(f), null, o);

            // Find the correct scale value. It should be the power of 2.
            final int REQUIRED_SIZE = 512;
            int width_tmp = o.outWidth, height_tmp = o.outHeight;
            int scale = 1;
            while (true) {
                if (width_tmp / 2 < REQUIRED_SIZE || height_tmp / 2 < REQUIRED_SIZE)
                    break;
                width_tmp /= 2;
                height_tmp /= 2;
                scale *= 2;
            }

            // decode with inSampleSize
            BitmapFactory.Options o2 = new BitmapFactory.Options();
            o2.inSampleSize = scale;
            return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
        } catch (FileNotFoundException e) {

            Log(e.getMessage());
        }
        return null;
    }

    /**
     * Capture image using camera <br/>
     * REQUEST_CODE = ImagePro.CAMERA_CODE
     */
    public void captureImage() {

        if(activity != null) {

            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            File f = new File(android.os.Environment.getExternalStorageDirectory(), "temp1.jpg");
            mImageCaptureUri = Uri.fromFile(f);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, mImageCaptureUri);
            activity.startActivityForResult(intent, CAMERA_CODE);

        } else {

            LogToast("Activity not assigned");
        }
    }

    /**
     * pick image from gallery
     */
    public void pickImage() {

        Intent i = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        activity.startActivityForResult(i, GALLERY_CODE);
    }

    /**
     * cropping the uri image
     * @param uri - open cropping dialog using the uri data
     */
    public void croppingImage(Uri uri) {

        CroppingIMG(uri);
    }

    int CROP_IMG_X=512;
    int CROP_IMG_Y=512;

    public void croppingImage(Uri uri, int cropX, int cropY) {

        CROP_IMG_X = cropX;
        CROP_IMG_Y = cropY;

        CroppingIMG(uri);
    }

    File outPutFile=null;

    private void CroppingIMG(Uri uri) {

        final ArrayList<CroppingOption> cropOptions = new ArrayList<>();

        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setType("image/*");

        List<ResolveInfo> list = activity.getPackageManager().queryIntentActivities( intent, 0 );
        int size = list.size();
        if (size == 0) {
            LogToast("Can't find image croping app");
        } else {
            intent.setData(uri);
            intent.putExtra("outputX", CROP_IMG_X);
            intent.putExtra("outputY", CROP_IMG_Y);
            intent.putExtra("aspectX", 1);
            intent.putExtra("aspectY", 1);
            intent.putExtra("scale", true);

            //Create output file here
            intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(outPutFile));

            if (size == 1) {
                Intent i   = new Intent(intent);
                ResolveInfo res = list.get(0);

                i.setComponent( new ComponentName(res.activityInfo.packageName, res.activityInfo.name));

                activity.startActivityForResult(i, CROPPING_CODE);
            } else {
                for (ResolveInfo res : list) {
                    final CroppingOption co = new CroppingOption();

                    co.title = activity.getPackageManager().getApplicationLabel(res.activityInfo.applicationInfo);
                    co.icon = activity.getPackageManager().getApplicationIcon(res.activityInfo.applicationInfo);
                    co.appIntent = new Intent(intent);
                    co.appIntent.setComponent( new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
                    cropOptions.add(co);
                }

                CropingOptionAdapter adapter = new CropingOptionAdapter(activity.getApplicationContext(), cropOptions);

                AlertDialog.Builder builder = new AlertDialog.Builder(activity);
                builder.setTitle("Choose Cropping App");
                builder.setCancelable(false);
                builder.setAdapter( adapter, new DialogInterface.OnClickListener() {
                    public void onClick( DialogInterface dialog, int item ) {
                        activity.startActivityForResult( cropOptions.get(item).appIntent, CROPPING_CODE);
                    }
                });

                builder.setOnCancelListener( new DialogInterface.OnCancelListener() {
                    @Override
                    public void onCancel( DialogInterface dialog ) {

                        if (mImageCaptureUri != null ) {
                            activity.getContentResolver().delete(mImageCaptureUri, null, null );
                            mImageCaptureUri = null;
                        }
                    }
                } );

                AlertDialog alert = builder.create();
                alert.show();
            }
        }
    }

    /**
     * Capture image using camera<br/>
     * REQUEST_CODE = User defined code<br/>
     * <br/>
     * @param iRequestCode User defined code
     */
    public void captureImage(int iRequestCode) {

        CAMERA_CODE = iRequestCode;
        captureImage();
    }

    /**
     * get path, bitmap, file and uri from image details object
     */
    public class ImageDetails {

        String path="";
        Bitmap bitmap=null;
        File file=null;
        Uri uri=null;

        public Uri getUri() {
            return uri;
        }

        public void setUri(Uri uri) {
            this.uri = uri;
        }

        public String getPath() {
            return path;
        }

        public void setPath(String path) {
            this.path = path;
        }

        public Bitmap getBitmap() {
            return bitmap;
        }

        public void setBitmap(Bitmap bitmap) {
            this.bitmap = bitmap;
        }

        public File getFile() {
            return file;
        }

        public void setFile(File file) {
            this.file = file;
        }
    }

    /**
     * Created by DP on 7/12/2016.
     */
    public class CroppingOption {
        public CharSequence title;
        public Drawable icon;
        public Intent appIntent;
    }

    public class CropingOptionAdapter extends ArrayAdapter {
        private ArrayList<CroppingOption> mOptions;
        private LayoutInflater mInflater;

        public CropingOptionAdapter(Context context, ArrayList<CroppingOption> options) {

            super(context, R.layout.croping_selector, options);
            mOptions  = options;
            mInflater = LayoutInflater.from(context);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup group) {
            if (convertView == null)
                convertView = mInflater.inflate(R.layout.croping_selector, null);

            CroppingOption item = mOptions.get(position);

            if (item != null) {
                ((ImageView) convertView.findViewById(R.id.img_icon)).setImageDrawable(item.icon);
                ((TextView) convertView.findViewById(R.id.txt_name)).setText(item.title);

                return convertView;
            }

            return null;
        }
    }
}

MainActivity.java

ImagePro imagePro;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imagePro = new ImagePro(this);
    }

    public void onClickUploadImageButton(View view) {

        imagePro.openImagePickOption();
    }

onActivityResult

if(requestCode == CAMERA_CODE && resultCode == RESULT_OK) {

            imageDetails = imagePro.getImagePath(CAMERA_CODE, RESULT_OK, data);
            ivCrop.setImageBitmap(imageDetails.getBitmap());
//imageDetails.getPath(), imageDetails.getBitmap(), imageDetails.getUri(), imageDetails.getFile
        }

回答10:

 private static final int CAMERA_CAPTURE = 1;  
 private Uri fileUri;   
 btn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            capturepic();
        }
    });

private void capturepic()
 {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);

intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);

startActivityForResult(intent, CAMERA_CAPTURE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// if the result is capturing Image
if (requestCode == CAMERA_CAPTURE) {
    if (resultCode == RESULT_OK) {
        capturedImage();
    } else if (resultCode == RESULT_CANCELED) {

        Toast.makeText(Activity.this,
                "User cancelled image capture", Toast.LENGTH_SHORT)
                .show();
    } else {
        Toast.makeText(Activity.this,
                "Failed to capture image", Toast.LENGTH_SHORT)
                .show();
    }
}
}
 private void capturedImage() {
    try {

        BitmapFactory.Options options = new BitmapFactory.Options();


        options.inSampleSize = 8;

        final Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(),
                options);

        img.setImageBitmap(bitmap);
    } catch (NullPointerException e) {
        e.printStackTrace();
    }
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putParcelable("file_uri", fileUri);
}

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
fileUri = savedInstanceState.getParcelable("file_uri");
}

Hope it helps.