如何在我的Android应用程序中将相机照片保存到相册文件夹中

时间:2013-10-29 07:28:46

标签: android

我是android新手。我要创建一个Android应用程序。我想在我的应用程序中创建一个相册文件夹,并将相机照片保存到相册文件夹中。请建议我如何。

我的代码是:

公共类CameraPhotoCapture扩展了Activity {

final static int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 1;


Uri imageUri                      = null;
static TextView imageDetails      = null;
public  static ImageView showImg  = null;
CameraPhotoCapture CameraActivity = null;


@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_camera_photo_capture);
    CameraActivity = this;

    imageDetails = (TextView) findViewById(R.id.imageDetails);

    showImg = (ImageView) findViewById(R.id.showImg);

    final Button photo = (Button) findViewById(R.id.photo);



    photo.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {

            /***** Define the file-name to save photo taken by Camera activity *******/
            String fileName = "Camera_Example.jpg";

            // Create parameters for Intent with filename

            ContentValues values = new ContentValues();

            values.put(MediaStore.Images.Media.TITLE, fileName);

            values.put(MediaStore.Images.Media.DESCRIPTION,"Image capture by camera");

            /****** imageUri is the current activity attribute, define and save it for later usage  *****/
            imageUri = getContentResolver().insert(
                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

            /******   EXTERNAL_CONTENT_URI : style URI for the "primary" external storage volume. ******/


            /******  Standard Intent action that can be sent to have the camera application capture an image and return it. ******/ 

            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

             intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);

             intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);

            startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);

        }   

    });
}

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) 
    {
        if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {

            if (resultCode == RESULT_OK) {

                String imageId = convertImageUriToFile(imageUri,CameraActivity);

                new LoadImagesFromSDCard().execute(""+imageId);


            } else if (resultCode == RESULT_CANCELED) {

                Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT).show();
            } else {

                Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT).show();
            }
        }
    }


 public static String convertImageUriToFile (Uri imageUri, Activity activity)  {
        Cursor cursor = null;
        int imageID = 0;

        try {
            /*********** Which columns values want to get *******/
            String [] proj={
                             MediaStore.Images.Media.DATA, 
                             MediaStore.Images.Media._ID,
                             MediaStore.Images.Thumbnails._ID, 
                             MediaStore.Images.ImageColumns.ORIENTATION
                           };

            cursor = activity.managedQuery( 

                            imageUri,   // Get data for specific image URI
                            proj,       // Which columns to return
                            null,       // WHERE clause; which rows to return (all rows)
                            null,       // WHERE clause selection arguments (none)
                            null        // Order-by clause (ascending by name)

                         );      

            int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);
            int columnIndexThumb = cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
            int file_ColumnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            //int orientation_ColumnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns.ORIENTATION);

            int size = cursor.getCount();

            /*******  If size is 0, there are no images on the SD Card. *****/

            if (size == 0) {
                imageDetails.setText("No Image");
            }
            else
            {

                int thumbID = 0;
                if (cursor.moveToFirst()) {

                    /**************** Captured image details ************/

                    /*****  Used to show image on view in LoadImagesFromSDCard class ******/
                    imageID = cursor.getInt(columnIndex);

                    thumbID   = cursor.getInt(columnIndexThumb);

                    String Path = cursor.getString(file_ColumnIndex);

                    //String orientation =  cursor.getString(orientation_ColumnIndex);

                    String CapturedImageDetails = " CapturedImageDetails : \n\n"
                                                      +" ImageID :"+imageID+"\n"
                                                      +" ThumbID :"+thumbID+"\n"
                                                      +" Path :"+Path+"\n";

                    // Show Captured Image detail on view
                    imageDetails.setText(CapturedImageDetails);

                }
            }    
        } finally {
            if (cursor != null) {
                cursor.close();
            }
        }

        return ""+imageID;
    }


     /**
     * Async task for loading the images from the SD card. 
     * 
     * @author Android Example
     *
     */
    // Class with extends AsyncTask class
    public class LoadImagesFromSDCard  extends AsyncTask<String, Void, Void> {

        private ProgressDialog Dialog = new ProgressDialog(CameraPhotoCapture.this);

        Bitmap mBitmap;

        protected void onPreExecute() {
            /****** NOTE: You can call UI Element here. *****/

            //UI Element
            Dialog.setMessage("Loading image from Sdcard..");
            Dialog.show();
        }

        // Call after onPreExecute method
        protected Void doInBackground(String... urls) {

            Bitmap bitmap = null;
            Bitmap newBitmap = null;
            Uri uri = null;       


                try {

                    /**  Uri.withAppendedPath Method Description
                    * Parameters
                    *    baseUri  Uri to append path segment to 
                    *    pathSegment  encoded path segment to append 
                    * Returns
                    *    a new Uri based on baseUri with the given segment appended to the path
                    */

                    uri = Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "" + urls[0]);

                    /**************  Decode an input stream into a bitmap. *********/
                    bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));

                    if (bitmap != null) {

                        /********* Creates a new bitmap, scaled from an existing bitmap. ***********/

                        newBitmap = Bitmap.createScaledBitmap(bitmap, 170, 170, true); 

                        bitmap.recycle();

                        if (newBitmap != null) {

                            mBitmap = newBitmap;
                        }
                    }
                } catch (IOException e) {
                    //Error fetching image, try to recover

                    /********* Cancel execution of this task. **********/
                    cancel(true);
                }

            return null;
        }

        protected void onPostExecute(Void unused) {

            // NOTE: You can call UI Element here.

            // Close progress dialog
            Dialog.dismiss();

            if(mBitmap != null)
              showImg.setImageBitmap(mBitmap);

        }

    }

}

1 个答案:

答案 0 :(得分:0)

尝试这个。

String path = Environment.getExternalStorageDirectory() + "/appsalbum/example.jpg";
File file = new File(path);
Uri outputFileUri = Uri.fromFile( file );
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE );
intent.putExtra( MediaStore.EXTRA_OUTPUT, outputFileUri );
startActivityForResult( intent, CAPTURE_IMAGE );