Question

我将我的图像保存到sdcard中的文件夹，现在在我的Android应用程序中，我想创建图像选择器，打开此特定文件夹并允许选择图像。

尝试了很多SO解决方案，但没有一个能为我工作！

任何帮助将不胜感激。提前谢谢。

Answer 1

不，这是不可能的。如有必要，您可以实现自己的图库，仅从

中选择图像

android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI

和

android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI

Answer 2

Try the following code :
private void loadImageFromMyFolder() {

    asyncBar.setVisibility(View.GONE);
    File yourDir = new File("/rootPath/myImage/");
    yourDir.mkdir();
    ArrayList<GalleryHelper> dataT = null;
    dataT = new ArrayList<GalleryHelper>();
    videoLoder.cancel(true);
    asyncBar.setVisibility(View.GONE);
    for (File f : yourDir.listFiles()) {
        if (f.isFile()) {
            imageLoader.displayImage("/rootPath/myImage/" + f.getName(), imgSinglePick);

            GalleryHelper item = new GalleryHelper();
            item.sdcardPath = "/rootPath/myImage/" + f.getName();

            dataT.add(item);
        }
    }
    imgAdapter.addAll(dataT);
}

公共类GalleryHelper {

public String sdcardPath;

public File file;

public boolean isSeleted = false;

}

Answer 3

您可以获取图片，只需在下面创建一个类代码，并在项目中使用它： -

public class ImagePath {

    Context context;

    public ImagePath(Context context) {
        this.context = context;
    }

    public static String getPath(final Context context, final Uri uri) {

        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

        // DocumentProvider
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }

                // TODO handle non-primary volumes
            }
            // DownloadsProvider
            else if (isDownloadsDocument(uri)) {

                final String id = DocumentsContract.getDocumentId(uri);
                final Uri contentUri = ContentUris.withAppendedId(
                        Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));

                return getDataColumn(context, contentUri, null, null);
            }
            // MediaProvider
            else if (isMediaDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }

                final String selection = "_id=?";
                final String[] selectionArgs = new String[] {
                        split[1]
                };

                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (and general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {
            return getDataColumn(context, uri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }

        return null;
    }

    /**
     * Get the value of the data column for this Uri. This is useful for
     * MediaStore Uris, and other file-based ContentProviders.
     *
     * @param context The context.
     * @param uri The Uri to query.
     * @param selection (Optional) Filter used in the query.
     * @param selectionArgs (Optional) Selection arguments used in the query.
     * @return The value of the _data column, which is typically a file path.
     */
    public static String getDataColumn(Context context, Uri uri, String selection,
            String[] selectionArgs) {

        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {
                column
        };

        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
                    null);
            if (cursor != null && cursor.moveToFirst()) {
                final int column_index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(column_index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }


    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is ExternalStorageProvider.
     */
    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     */
    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     */
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }
}

Answer 4

这很容易，但可能很长，因为您要创建自己的选择器。

步骤： 1.获取所需目录的文件路径

val folderPath = "${Environment.getExternalStorageDirectory()}/yourDirectoryName"

列出该目录下的所有文件

var arrayList: ArrayList<File> = arrayListOf()
if(folderPath.exists()){
    var files=folderPath.listFiles();
    if(files.length!=0){
        for(int i=0;i<files.length;i++)
        {
            var file=files[i];
            arrayList.add(file);
        }
    }
}

您具有arrayList中特定文件夹的所有文件。现在，使用recyclerView和适配器，即可创建选择器。

注意：如果不确定您的文件夹中是否可能包含其他不想提取的文件，请使用.pp排除它们

if(file.extension=="jpeg" || file.extension=="jpg"){
    arrayList.add(file)
}

Android图像选择器从指定的文件夹路径中选择图像

4 个答案: