Android Context Get getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs)

Description

Get the value of the data column for this Uri.

Parameter

Parameter	Description
context	The context.
uri	The Uri to query.
selection	(Optional) Filter used in the query.
selectionArgs	(Optional) Selection arguments used in the query.

Return

The value of the _data column, which is typically a file path.

Declaration

public static String getDataColumn(Context context, Uri uri,
        String selection, String[] selectionArgs) 

Method Source Code

//package com.java2s;

import android.content.Context;

import android.database.Cursor;
import android.net.Uri;

public class Main {
    /**/*  w  ww .ja v a 2 s .c  om*/
     * 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;
    }
}

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