在项目中需要用到将Uri转换为绝对路径,在网上找到一个方法,做个笔记
网上有不少方法,但是有的对4.4后的版本无效,这里的方法可以在4.4之后的版本将Uri转换为绝对路径
public class GetPathFromUri { /** * 专为AndroID4.4设计的从Uri获取文件绝对路径 */ 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]; } } // 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,selection,selectionArgs); } } // MediaStore (and general) else if ("content".equalsIgnoreCase(uri.getScheme())) { return getDataColumn(context,uri,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,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()); } }
绝对路径转Uri比较简单
以绝对路径创建一个file对象,然后调用
Uri.fromfile(file)
以上所述是小编给大家介绍的AndroID Uri和文件路径互相转换的实例代码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对编程小技巧网站的支持!
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