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URIからファイルパスを取得する

画像ファイルのURIがあります。

私はこのコードを使用して、URIからファイルパスを取得します。

public String getRealPathFromURI(Uri contentUri) {
    Cursor cursor = null;
    try {
        String[] proj = { MediaStore.Images.Media.DATA };
        cursor = mContext.getContentResolver().query(contentUri, proj, null, null, null);
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    } catch (Exception e) {
        Log.message(e.getMessage());
    } finally {
        if (cursor != null) {
            cursor.close();
        }
    }
    return null;
}

ギャラリーアプリ（Android 4.4.2、arm-emu）から画像を選択した場合、

uri.getPath = /external/images/media/16 and it work's fine (My file path: /storage/sdcard/Download/0_cf15a_7800a7e5_orig.jpg)

ドキュメントアプリ（Android 4.4.2、arm-emu）から画像を選択した場合、

 I have uri.getPath = /document/image:16 and function getRealPathFromURI returns null.

両方のアクションでファイルへの正しいパスを返すにはどうすればよいですか？

私のコードは:-

    @Override
    public void onClick(View v) {
        final File root = new File(Environment.getExternalStorageDirectory() + File.separator + "Photohunt" + File.separator);
        root.mkdirs();
        final String fname = Common.getUniqueImageFilename();
        final File sdImageMainDirectory = new File(root, fname);
        outputFileUri = Uri.fromFile(sdImageMainDirectory);
            // Camera.
            final List<Intent> cameraIntents = new ArrayList<Intent>();
            final Intent captureIntent = new Intent(Android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            final PackageManager packageManager = mContext.getPackageManager();
            final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);
            for(ResolveInfo res : listCam) {
                final String packageName = res.activityInfo.packageName;
                final Intent intent = new Intent(captureIntent);
                intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
                intent.setPackage(packageName);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
                cameraIntents.add(intent);
            }

            // Filesystem.
            final Intent galleryIntent = new Intent();
            galleryIntent.setType("image/*");
            galleryIntent.setAction(Intent.ACTION_GET_CONTENT);

            // Chooser of filesystem options.
            final Intent chooserIntent = Intent.createChooser(galleryIntent, "Select Source");

            // Add the camera options.
            chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[]{}));

            startActivityForResult(chooserIntent, PICTURE_REQUEST_CODE);
    }

アクティビティ結果の処理：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
    if(resultCode == Activity.RESULT_OK)
    {
        if(requestCode == PICTURE_REQUEST_CODE)
        {
            final boolean isCamera;
            if(data == null)
            {
                isCamera = true;
            }
            else
            {
                final String action = data.getAction();
                if(action == null)
                {
                    isCamera = false;
                }
                else
                {
                    isCamera = action.equals(Android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                }
            }

            Uri selectedImageUri;
            if(isCamera)
            {
                selectedImageUri = outputFileUri;
            }
            else
            {
                selectedImageUri = data == null ? null : data.getData();
            }

            Log.variable("uri", selectedImageUri.getPath());
            ConfirmImageFragment fragment = new ConfirmImageFragment(selectedImageUri, mContestId);
            FragmentTransaction transaction = getSherlockActivity().getSupportFragmentManager().beginTransaction();
            transaction.replace(R.id.main_container, fragment);
            transaction.addToBackStack(null);
            transaction.commit();
        }
    }

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

選択したファイルをImageViewにロードすると、両方の状態で正常に機能します。

private void loadImage() {
    try {
        Bitmap bitmap = MediaStore.Images.Media.getBitmap(mContext.getContentResolver(), mUri);
        mImage.setImageBitmap(bitmap);
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}
androidandroid-contentresolver
8
Artem

解決：

    public class RealPathUtil {

    @SuppressLint("NewApi")
    public static String getRealPathFromURI_API19(Context context, Uri uri){
        String filePath = "";
        String wholeID = DocumentsContract.getDocumentId(uri);

         // Split at colon, use second item in the array
         String id = wholeID.split(":")[1];

         String[] column = { MediaStore.Images.Media.DATA };     

         // where id is equal to             
         String sel = MediaStore.Images.Media._ID + "=?";

         Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, 
                                   column, sel, new String[]{ id }, null);

         int columnIndex = cursor.getColumnIndex(column[0]);

         if (cursor.moveToFirst()) {
             filePath = cursor.getString(columnIndex);
         }   
         cursor.close();
         return filePath;
    }


    @SuppressLint("NewApi")
    public static String getRealPathFromURI_API11to18(Context context, Uri contentUri) {
          String[] proj = { MediaStore.Images.Media.DATA };
          String result = null;

          CursorLoader cursorLoader = new CursorLoader(
                  context, 
            contentUri, proj, null, null, null);        
          Cursor cursor = cursorLoader.loadInBackground();

          if(cursor != null){
           int column_index = 
             cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
           cursor.moveToFirst();
           result = cursor.getString(column_index);
          }
          return result;  
    }

    public static String getRealPathFromURI_BelowAPI11(Context context, Uri contentUri){
               String[] proj = { MediaStore.Images.Media.DATA };
               Cursor cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
               int column_index
          = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
               cursor.moveToFirst();
               return cursor.getString(column_index);
    }
}

http://hmkcode.com/Android-display-selected-image-and-its-real-path/

22
Artem

APIレベルを検出し、正しい方法を使用する、受け入れられた回答のより単純なバージョン：

@TargetApi(Build.VERSION_CODES.KitKat)
public static String getFilePath(Context context, Uri uri)
{
    int currentApiVersion;
    try
    {
         currentApiVersion = Android.os.Build.VERSION.SDK_INT;
    }
    catch(NumberFormatException e)
    {
        //API 3 will crash if SDK_INT is called
        currentApiVersion = 3;
    }
    if (currentApiVersion >= Build.VERSION_CODES.KitKat)
    {
        String filePath = "";
        String wholeID = DocumentsContract.getDocumentId(uri);

        // Split at colon, use second item in the array
        String id = wholeID.split(":")[1];

        String[] column = {MediaStore.Images.Media.DATA};

        // where id is equal to
        String sel = MediaStore.Images.Media._ID + "=?";

        Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                column, sel, new String[]{id}, null);

        int columnIndex = cursor.getColumnIndex(column[0]);

        if (cursor.moveToFirst())
        {
            filePath = cursor.getString(columnIndex);
        }
        cursor.close();
        return filePath;
    }
    else if (currentApiVersion <= Build.VERSION_CODES.HONEYCOMB_MR2 && currentApiVersion >= Build.VERSION_CODES.HONEYCOMB)

    {
        String[] proj = {MediaStore.Images.Media.DATA};
        String result = null;

        CursorLoader cursorLoader = new CursorLoader(
                context,
                uri, proj, null, null, null);
        Cursor cursor = cursorLoader.loadInBackground();

        if (cursor != null)
        {
            int column_index =
                    cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            result = cursor.getString(column_index);
        }
        return result;
    }
    else
    {

        String[] proj = {MediaStore.Images.Media.DATA};
        Cursor cursor = context.getContentResolver().query(uri, proj, null, null, null);
        int column_index
                = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    }
}
2
yehyatt

マニフェストで許可を与えるようにしてください。許可を与えずにさまざまな方法を試して2時間を無駄にしました：/

<uses-permission Android:name="Android.permission.READ_EXTERNAL_STORAGE" />
1
Haroon Rasheed

だから私は基本的にスタックで答えを試しましたが、これが私のために働いた唯一のものでした。 uriは、イメージが指し示す場所に存在する「約束」として考えることが重要です。これは、その場所にファイルがあることを意味するわけではありませんが、正しく尋ねると画像が表示されます。 attachementPathは、画像へのパスです（通常のファイルのように使用できます）。下記参照：

try {
            InputStream input = getActivity().getContentResolver().openInputStream(imageUri);
            File file = new File(getActivity().getCacheDir(), "cacheFileAppeal.png");
            try {

                OutputStream output = new FileOutputStream(file);
                try {
                    try {
                        byte[] buffer = new byte[4 * 1024]; // or other buffer size
                        int read;

                        if (input != null) {
                            while ((read = input.read(buffer)) != -1) {
                                output.write(buffer, 0, read);
                            }
                        }
                        output.flush();
                    } finally {
                        output.close();
                        attachmentPath = file.getAbsolutePath();
                    }
                } catch (Exception e) {
                    e.printStackTrace(); // handle exception, define IOException and others
                }

            } finally {
                try {
                    if (input != null) {
                        input.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
0
MarcusM.

これでうまくいくと思います。パスからURIを取得するための一般化されたコード：

String path = yourAndroidURI.uri.getPath()
File file = new File(new URI(path));
0
Hirak Chhatbar

public static int getIdFromUri（Uri uri、String constantId）{Cursor c = ContentMaster.getContentResolver（）。query（uri、new String [] {constantId}、null、null、null）;

    int res = -1;
    if(c != null && c.getCount() > 0)
    {
        c.moveToFirst();
        res = c.getInt(0);
        c.close();
    }
    return res;
}
public static Uri getUriWithId(Uri baseUri,int contactId)
{
    Uri u = ContentUris.withAppendedId(baseUri, contactId);

    if(u != null)
        return u;

    return Uri.EMPTY;
}
public static String getRealPathFromURI(Uri uri)
{
    if(uri == null)
        return "";

    if ("file".equalsIgnoreCase(uri.getScheme()))
        return uri.getPath();


    String[] pro = { MediaStore.Images.Media.DATA };
    String result = null;
    Cursor cursor;

    if(VERSION.SDK_INT > 18)
    {
        //String wholeID = DocumentsContract.getDocumentId(uri);
        //String id = wholeID.split(":")[1];
        String id = String.valueOf(getIdFromUri(uri, Images.Media._ID));
        String[] column = { MediaStore.Images.Media.DATA };
        String where = MediaStore.Images.Media._ID + "=?";
        Uri u = uri;

        if(isMediaDocument(uri))
        {
            if (getUriMediaDocumentType(uri).equals("image"))
            {
                if(isExternalStorageDocument(uri))
                    u = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                else
                    u = MediaStore.Images.Media.INTERNAL_CONTENT_URI;
            }
            else if (getUriMediaDocumentType(uri).equals("video"))
            {
                if(isExternalStorageDocument(uri))
                    u = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                else
                    u = MediaStore.Video.Media.INTERNAL_CONTENT_URI;
            }
            else if (getUriMediaDocumentType(uri).equals("audio"))
            {
                if(isExternalStorageDocument(uri))
                    u = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                else
                    u = MediaStore.Audio.Media.INTERNAL_CONTENT_URI;
            }
        }
        else if(isDownloadsDocument(uri))
        {
            u = getUriWithId(Uri.parse("content://downloads/public_downloads"), Integer.getInteger(id));
        }

        cursor = getContentResolver().query(u, column, where, new String[]{id}, null);
    }
    else if(VERSION.SDK_INT > 10)
    {
        CursorLoader cursorLoader = new CursorLoader(SystemMaster.getContext(), uri, pro, null, null, null);
        cursor = cursorLoader.loadInBackground();
    }
    else
    {
        cursor = SystemMaster.getContext().getContentResolver().query(uri, pro, null, null, null);
    }


    if(cursor != null && cursor.getCount() > 0)
    {
        cursor.moveToFirst();
        result = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
        cursor.close();
    }

    return result;
}

public static boolean isExternalStorageDocument(Uri uri)
{
    return "com.Android.externalstorage.documents".equals(uri.getAuthority());
}

public static boolean isDownloadsDocument(Uri uri)
{
    return "com.Android.providers.downloads.documents".equals(uri.getAuthority());
}

public static boolean isMediaDocument(Uri uri)
{
    return "com.Android.providers.media.documents".equals(uri.getAuthority());
}

public static String getUriMediaDocumentType(Uri uri)
{
    if(isMediaDocument(uri))
    {
       //TODO
        return "image";
    }

    return "";
}
0
Ali Bagheri