Question

我已经关注并从字面上获取了其他答案中的代码，但它仍无效。

单击图片时，默认情况下会将其保存在名称为20150910_111841.jpg（date_timeInMilliseconds）的DCIM /摄像头中，但我想将其另存为“myName_date.jpg”。

public void OnClick(){
 if (items[item].equals("Take Photo")) {
                    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                    f = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
                    mMediaUri=Uri.fromFile(new File(f, "MEDIT"+System.currentTimeMillis()+"jpg"));
                    intent.putExtra(MediaStore.EXTRA_OUTPUT, mMediaUri);
                    startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (resultCode==RESULT_OK){
        switch(requestCode) {
            case REQUEST_IMAGE_CAPTURE:
                Bitmap bm = BitmapFactory.decodeFile(mMediaUri.getPath());
                //imgVIew.setImageBitmap(bm);

                Bitmap scaledBitmap=ScaleImage(bm);
                final ByteArrayOutputStream bos = new ByteArrayOutputStream();
                scaledBitmap.compress(Bitmap.CompressFormat.JPEG,100, bos);
                //Bitmap decoded = BitmapFactory.decodeStream(new ByteArrayInputStream(bos.toByteArray()));
                imgVIew.setImageBitmap(scaledBitmap);
                imageView.setImage(ImageSource.bitmap(scaledBitmap));
                imageView1.setImage(ImageSource.bitmap(bm));
                    break;
            case REQUEST_GALLERY:

                    //Uri selectedImage = imageReturnedIntent.getData();
                    //imageview.setImageURI(selectedImage);
                    break;
        }//Close switch statement

    }else {
        Log.d("Error ", "user canceled !");
    }

}

我还没有为图库部分添加代码，但这应该不是问题。截至目前，无论我做什么，它被保存为默认，但我意识到如果人们没有SD卡，那么它可能会导致问题。我宁愿在默认的DCIM位置提供此图片，但使用自定义名称。谢谢！

Answer 1

尝试以下代码，使用您想要的名称保存图像：

/** 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");
        */
        File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_DCIM), "the_name_of_directory");

        // 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("canberra trailpass", "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 +
            "myName"+ timeStamp + ".jpg");
        } else {
            return null;
        }

        return mediaFile;
    }

Answer 2

它会，这个

File fPath = getAlbumStorageDir("myName_date");
File f = new File(fPath, "myName_date" + Calendar.getInstance().getTimeInMillis() + ".jpg");

这不是设备问题，例如我的工作代码，我已经实现了这样的目标，

public static Uri getUri(String filePath) {
    File media = new File(filePath);
    Uri uri = Uri.fromFile(media);
    return uri;
}

public static File getAlbumStorageDir(String albumName) {
    File file = new File(Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES), albumName);
    if (file.exists()) {
        Log.d(LOGTAG, "storeage file exists");
    }
    if (!(file.mkdirs() || file.isDirectory())) {
        Log.e(LOGTAG, "Directory not created");
    }
    return file;
}

public static class SaveImageTask extends AsyncTask<Bitmap, Void, String> {

    private SaveImageListener listener;

    public SaveImageTask(SaveImageListener listener) {
        this.listener = listener;
    }

    @Override
    protected String doInBackground(Bitmap... params) {
        Bitmap bitmapToSave = params[0];

        File fPath = getAlbumStorageDir("AppName");
        File f = new File(fPath, "AppName" + Calendar.getInstance().getTimeInMillis() + ".jpg");
        String filePath = null;
        try {
            FileOutputStream strm = new FileOutputStream(f);
            bitmapToSave.compress(Bitmap.CompressFormat.JPEG, 100, strm);
            strm.close();
            filePath = f.getPath();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return filePath;
    }

    @Override
    protected void onPostExecute(String filePath) {
        super.onPostExecute(filePath);
        listener.onImageSaved(filePath);
    }

    interface SaveImageListener {
        void onImageSaved(String filePath);
    }
}

Answer 3

Uri mImageCaptureUri;

Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    mImageCaptureUri = Uri.fromFile(new File(Environment
            .getExternalStorageDirectory(), "example.jpg"));

    takePictureIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT,
            mImageCaptureUri);

    startActivityForResult(takePictureIntent, 1);

onActivityResult：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult(requestCode, resultCode, data);      

    if(resultCode == RESULT_OK) {

            switch (requestCode) {

                case 1:

                    if(mImageCaptureUri!=null) {

                    imageName = "";
                    Bitmap bitmap = getCameraImage(activity, mImageCaptureUri);

                    imgView.setImageBitmap(bitmap );

                    removeFile(mImageCaptureUri.getPath());

                    break;
            }
    }
}

获取相机图片：

public static Bitmap getCameraImage(Activity activity, Uri mImageCaptureUri){

if(mImageCaptureUri==null) {

        return null;

    } else {

        activity.getContentResolver().notifyChange(mImageCaptureUri, null);
        ContentResolver cr = activity.getContentResolver();
        Bitmap bitmap = null;

        try {

            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inSampleSize = 6;

            AssetFileDescriptor fileDescriptor =null;
            fileDescriptor =
                    cr.openAssetFileDescriptor( mImageCaptureUri, "r");

            bitmap
              = BitmapFactory.decodeFileDescriptor(
                fileDescriptor.getFileDescriptor(), null, options);


            //bitmap = android.provider.MediaStore.Images.Media.getBitmap(cr, mImageCaptureUri);

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

        return bitmap;

    }
}

通过DCIM /图片中的相机意图保存图片的自定义名称

3 个答案: