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  • 根据Uri,Cursor没有获取到对应的属性

    Android:

    背景:调用摄像头,拍摄视频,指定保存的地址,但是返回的Cursor文件,只有名称和大小的属性,没有其他诸如时长,连ID属性都没有

    使用 

    cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DURATION));
    获取时长,会报错:
    java.lang.java.lang.illegalargumentexception

    如果不指定位置,属性就可以获取,指定位置后,除了名称和大小的属性之前就都无法获得
    还请会的大佬指点一下!
    -----------------------------------------------------------------------------
    时过经年,发现这个问题还在这挂着,时间太久了,附上目前在使用的某方法,由大佬网络提供

    /*
    ******************************* Copyright (c)*********************************
    **
    **                 (c) Copyright 2015, 蒋朋, china, qd. sd
    **                          All Rights Reserved
    **
    **                           By()
    **
    **
    **-----------------------------------版本信息------------------------------------
    ** 版    本: V0.1
    **
    **------------------------------------------------------------------------------
    ********************************End of Head************************************
    */
    
    import android.annotation.TargetApi;
    import android.content.ContentUris;
    import android.content.Context;
    import android.database.Cursor;
    import android.net.Uri;
    import android.os.Environment;
    import android.provider.DocumentsContract;
    import android.provider.MediaStore;
    
    /**
     * 获取图片的路径
     */
    
    public class ImageUtil {
    
        @TargetApi(19)
        public static String getImageAbsolutePath(Context context, Uri imageUri) {
            if (context == null || imageUri == null)
                return null;
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, imageUri)) {
                if (isExternalStorageDocument(imageUri)) {
                    String docId = DocumentsContract.getDocumentId(imageUri);
                    String[] split = docId.split(":");
                    String type = split[0];
                    if ("primary".equalsIgnoreCase(type)) {
                        return Environment.getExternalStorageDirectory() + "/" + split[1];
                    }
                } else if (isDownloadsDocument(imageUri)) {
                    String id = DocumentsContract.getDocumentId(imageUri);
                    Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
                    return getDataColumn(context, contentUri, null, null);
                } else if (isMediaDocument(imageUri)) {
                    String docId = DocumentsContract.getDocumentId(imageUri);
                    String[] split = docId.split(":");
                    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;
                    }
                    String selection = MediaStore.Images.Media._ID + "=?";
                    String[] selectionArgs = new String[]{split[1]};
                    return getDataColumn(context, contentUri, selection, selectionArgs);
                }
            } // MediaStore (and general)
            else if ("content".equalsIgnoreCase(imageUri.getScheme())) {
                // Return the remote address
                if (isGooglePhotosUri(imageUri))
                    return imageUri.getLastPathSegment();
                return getDataColumn(context, imageUri, null, null);
            }
            // File
            else if ("file".equalsIgnoreCase(imageUri.getScheme())) {
                return imageUri.getPath();
            }
            return null;
        }
    
        public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
            Cursor cursor = null;
            String column = MediaStore.Images.Media.DATA;
            String[] projection = {column};
            try {
                cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
                if (cursor != null && cursor.moveToFirst()) {
                    int index = cursor.getColumnIndexOrThrow(column);
                    return cursor.getString(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());
        }
    
        /**
         * @param uri The Uri to check.
         * @return Whether the Uri authority is Google Photos.
         */
        public static boolean isGooglePhotosUri(Uri uri) {
            return "com.google.android.apps.photos.content".equals(uri.getAuthority());
        }
    }
    

      

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  • 原文地址:https://www.cnblogs.com/uoky/p/13428251.html
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