Get thumbnail Uri/path of the image stored in sd card + android

问题

SDK version - 1.6

I am using following intent to open android's default gallery:

Intent intent = new Intent();
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_GET_CONTENT);
                startActivityForResult(
                        Intent.createChooser(intent, "Select Picture"), 101);

Now in onActivityResult, i am able to get the original Uri and path of the selected image, but i am not able to get the Uri and path of the thumbnail of selected image.

Code for getting the original image Uri and path:

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

        try {

            if (requestCode == 101 && data != null) {

                Uri selectedImageUri = data.getData();
                String selectedImagePath = getPath(selectedImageUri);
} else {
                Toast toast = Toast.makeText(this, "No Image is selected.",
                        Toast.LENGTH_LONG);
                toast.show();
            }

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

    public String getPath(Uri uri) {
        String[] projection = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        int column_index = cursor
                .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

        cursor.moveToFirst();
        return cursor.getString(column_index);
    }

PS: 1) i am not looking to resize image like this question. I am specifically looking for the thumbnails which are generated by android OS itself.

2) Using SDK version 1.6 so not interested in ThumbnailUtils class.

回答1:

You can use this to get the thumbnail:

Bitmap bitmap = MediaStore.Images.Thumbnails.getThumbnail(
                             getContentResolver(), selectedImageUri,
                             MediaStore.Images.Thumbnails.MINI_KIND,
                             (BitmapFactory.Options) null );

There are two types of thumbnails available:
MINI_KIND: 512 x 384 thumbnail
MICRO_KIND: 96 x 96 thumbnail

OR use [queryMiniThumbnails][1] with almost same parameters to get the path of the thumbnail.

EDIT

Cursor cursor = MediaStore.Images.Thumbnails.queryMiniThumbnails(
                             getContentResolver(), selectedImageUri,
                             MediaStore.Images.Thumbnails.MINI_KIND,
                             null );
if( cursor != null && cursor.getCount() > 0 ) {
     cursor.moveToFirst();//**EDIT**
     String uri = cursor.getString( cursor.getColumnIndex( MediaStore.Images.Thumbnails.DATA ) );
}

HTH !

[1]: https://developer.android.com/reference/android/provider/MediaStore.Images.Thumbnails.html#queryMiniThumbnails(android.content.ContentResolver, android.net.Uri, int, java.lang.String[])

回答2:

This solution is work on me!

final int THUMBSIZE = 128;

Bitmap thumbImage = ThumbnailUtils.extractThumbnail(
                         BitmapFactory.decodeFile(file.getAbsolutePath()), 
                         THUMBSIZE, 
                         THUMBSIZE);

回答3:

It could be a alternative ways as other had already mentioned in their answer but Easy way i found to get thumbnail is using ExifInterface

ExifInterface exif = new ExifInterface(pictureFile.getPath());
byte[] imageData=exif.getThumbnail();
Bitmap  thumbnail= BitmapFactory.decodeByteArray(imageData,0,imageData.length);

回答4:

Two variants without depricated methods.

 public String getThumbnailPath(Uri uri) {
    String[] proj = { MediaStore.Images.Media.DATA };

    // This method was deprecated in API level 11
    // Cursor cursor = managedQuery(contentUri, proj, null, null, null);

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

    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);

    cursor.moveToFirst();
    long imageId = cursor.getLong(column_index);
    //cursor.close();
    String result="";
    cursor = MediaStore.Images.Thumbnails.queryMiniThumbnail(activity.getContentResolver(), imageId,
            MediaStore.Images.Thumbnails.MINI_KIND, null);
    if (cursor != null && cursor.getCount() > 0) {
        cursor.moveToFirst();
        result = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails.DATA));
        cursor.close();
    }
    return result;
}
public Bitmap getThumbnailBitmap(Uri uri){
    String[] proj = { MediaStore.Images.Media.DATA };

    // This method was deprecated in API level 11
    // Cursor cursor = managedQuery(contentUri, proj, null, null, null);

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

    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);

    cursor.moveToFirst();
    long imageId = cursor.getLong(column_index);
    //cursor.close();

    Bitmap bitmap = MediaStore.Images.Thumbnails.getThumbnail(
            getContentResolver(), imageId,
            MediaStore.Images.Thumbnails.MINI_KIND,
            (BitmapFactory.Options) null );

    return bitmap;
}

回答5:

Based on @Karan's answer and following comments, just for the people that arrive here (like I did) and need a ready-to-work code:

public String getThumbnailPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media._ID };
    String result = null;
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    int column_index = cursor
            .getColumnIndexOrThrow(MediaStore.Images.Media._ID);

    cursor.moveToFirst();
    long imageId = cursor.getLong(column_index);
    cursor.close();

    cursor = MediaStore.Images.Thumbnails.queryMiniThumbnail(
            getContentResolver(), imageId,
            MediaStore.Images.Thumbnails.MINI_KIND,
            null);
    if (cursor != null && cursor.getCount() > 0) {
        cursor.moveToFirst();
        result = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails.DATA));
        cursor.close();
    }
    return result;
}

回答6:

public static String getThumbnailPath(Context context, String path)
{
  long imageId = -1;

  String[] projection = new String[] { MediaStore.MediaColumns._ID };
  String selection = MediaStore.MediaColumns.DATA + "=?";
  String[] selectionArgs = new String[] { path };
  Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, selection, selectionArgs, null);
  if (cursor != null && cursor.moveToFirst())
  {
    imageId = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID));
    cursor.close();
  }

  String result = null;
  cursor = MediaStore.Images.Thumbnails.queryMiniThumbnail(context.getContentResolver(), imageId, MediaStore.Images.Thumbnails.MINI_KIND, null);
  if (cursor != null && cursor.getCount() > 0)
  {
    cursor.moveToFirst();
    result = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails.DATA));
    cursor.close();
  }

  return result;
}

回答7:

Take a look at the following class

http://developer.android.com/reference/android/provider/MediaStore.Images.Thumbnails.html

回答8:

The accepted answer is not working for me. I use following method to make it:

    try{
        Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getActivity().getContentResolver(), uri);
        Bitmap thumbBitmap = ThumbnailUtils.extractThumbnail(bitmap,120,120);
        // imageView.setImageBitmap(thumbBitmap);
    }
    catch (IOException ex){
        //......
    }

来源：https://stackoverflow.com/questions/5548645/get-thumbnail-uri-path-of-the-image-stored-in-sd-card-android

标签

android

thumbnails