我发现MediaStore.Images.Media.DATA已过时，因此我想使用另一种方法来获取图像真实路径。
这是我获取uri和图片标题的新方法，但我不知道如何获取真实路径。
我打印uri，标题，路径：
photoUri：content：// media / external / images / media / 1605
title：IMG_20191223143418
photoUri.getPath：/ external / images / media / 1605
但是我想要这样：/storage/emulated/0/DCIM/1733/IMG_20191223143418.jpg
public static String getRealPathFromUri(Context context, Uri uri) throws IOException {
String filePath = null;
if (DocumentsContract.isDocumentUri(context, uri)) {
String documentId = DocumentsContract.getDocumentId(uri);
if (isMediaDocument(uri)) { // MediaProvider.
String id = documentId.split(":")[1];
String selection = MediaStore.Images.Media._ID + "=?";
String[] selectionArgs = {id};
filePath = getDataColumnImage(context, MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection, selectionArgs);
} else if (isDownloadsDocument(uri)) { // DownloadsProvider.
Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(documentId));
filePath = getDataColumnImage(context, contentUri, null, null);
}
}
else if ("content".equalsIgnoreCase(uri.getScheme())) {
filePath = getDataColumnImage(context, uri, null, null);
}
else if ("file".equals(uri.getScheme())) {
filePath = uri.getPath();
}else
return filePath = null;
return filePath;
}
private static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
private static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
private static String getDataColumnImage(Context context, Uri uri, String selection, String[] selectionArgs) {
String path = null;
String[] projection = new String[]{
MediaStore.Files.FileColumns._ID,
MediaStore.Images.Media.DATE_TAKEN,
MediaStore.Images.Media.WIDTH,
MediaStore.Images.Media.HEIGHT,
MediaStore.MediaColumns.TITLE,
MediaStore.Images.Media.MIME_TYPE,
};
Cursor cursor = null;
try {
cursor = context.getContentResolver().query(
uri,
projection,
selection,
selectionArgs,
null
);
if (cursor != null && cursor.moveToFirst()) {
int idColumn = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns._ID);
int titleColumn = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.TITLE);
Uri photoUri = Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, cursor.getString(idColumn));
String title = cursor.getString(titleColumn);
Log.e("TAG", "photoUri: " + photoUri);
Log.e("TAG", "title: " + title);
Log.e("TAG", "photoUri.getPath: " + photoUri.getPath());
}
} catch (Exception e) {
if (cursor != null) {
cursor.close();
}
}
return path;
// MediaStore.Images.Media.DATA is deprecated, so I want to use the other way as mentioned above to get real path.
/*String[] projection = new String[]{MediaStore.Images.Media.DATA};
Cursor cursor = null;
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
int columnIndex = cursor.getColumnIndexOrThrow(projection[0]);
path = cursor.getString(columnIndex);
}
} catch (Exception e) {
if (cursor != null) {
cursor.close();
}
}
return path;*/
}
使用本课程公共类RealPathUtil {
@SuppressLint("NewApi")
private static String getRealPathApi19Above(Context context, Uri uri) {
String filePath = "";
try {
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 the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
/* String wholeID = DocumentsContract.getDocumentId(uri);
// Split at colon, use second item in the array
String id = wholeID.split(":")[1];
String[] column = {MediaStore.Images.Media.DATA};
// where id is equal to
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
column, sel, new String[]{id}, null);
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
*/
} catch (Exception e) {
filePath = "";
}
return filePath;
}
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 index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
@SuppressLint("NewApi")
private static String getRealPathApi11to18(Context context, Uri contentUri) {
try {
String[] proj = {MediaStore.Images.Media.DATA};
String result = null;
CursorLoader cursorLoader = new CursorLoader(
context,
contentUri, proj, null, null, null);
Cursor cursor = cursorLoader.loadInBackground();
if (cursor != null) {
int column_index =
cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
result = cursor.getString(column_index);
}
return result;
} catch (Exception e) {
return "";
}
}
public static String getImagePath(Context context, Uri uri) {
if (Build.VERSION.SDK_INT < 19)
return getRealPathApi11to18(context, uri);
else
return getRealPathApi19Above(context, uri);
} 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());
}