我从媒体库图像选择中返回onActivityResult，我可以使用以下内容获取图像的URI：
Uri selectedImage = data.getData();
将其转换为字符串即可：
content://media/external/images/media/47
或者路径给出：
/external/images/media/47
但是我似乎无法找到将其转换为绝对路径的方法，因为我想将图像加载到位图而不必将其复制到某处。我知道这可以使用URI和内容解析器完成，但这似乎在重新启动手机时中断，我猜MediaStore在重新启动之间不会保持其编号相同。
答案 0 :(得分：598)
API 19以下使用此代码从URI获取文件路径：
public String getRealPathFromURI(Context context, Uri contentUri) {
Cursor cursor = null;
try {
String[] proj = { MediaStore.Images.Media.DATA };
cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} finally {
if (cursor != null) {
cursor.close();
}
}
}
答案 1 :(得分：121)
只需对第一个答案进行简单更新：mActivity.managedQuery()现已弃用。我用新方法更新了代码。
private String getRealPathFromURI(Uri contentUri) {
String[] proj = { MediaStore.Images.Media.DATA };
CursorLoader loader = new CursorLoader(mContext, contentUri, proj, null, null, null);
Cursor cursor = loader.loadInBackground();
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String result = cursor.getString(column_index);
cursor.close();
return result;
}
答案 2 :(得分：95)
对于奥利奥
private void Button_MouseDown(object sender, MouseButtonEventArgs e)
{
DataObject data = new DataObject(DataFormats.Serializable, (Button)e.Source );
DragDrop.DoDragDrop((DependencyObject)e.Source, data, DragDropEffects.Move);
}
private void Button_DragEnter(object sender, DragEventArgs e)
{
Button btn_to_move = (Button) e.Data.GetData(DataFormats.Serializable);
int where_to_move = Pnl.Children.IndexOf((UIElement)e.Source);
int what_to_move = Pnl.Children.IndexOf(btn_to_move);
Pnl.Children.RemoveAt(what_to_move);
Pnl.Children.Insert(where_to_move, btn_to_move);
}
对于Oreo下面的所有版本，我已经制作了这个从uri获得真实路径的方法
Uri uri = data.getData();
File file = new File(uri.getPath());//create path from uri
final String[] split = file.getPath().split(":");//split the path.
filePath = split[1];//assign it to a string(your choice).
答案 3 :(得分：94)
不要试图在文件系统中找到一个uri，这在数据库中查找起来很慢。
您可以通过向工厂提供输入流来获取uri的位图，就像您将文件提供给工厂一样：
InputStream is = getContentResolver().openInputStream(uri);
Bitmap bitmap = BitmapFactory.decodeStream(is);
is.close();
答案 4 :(得分：39)
这是我获取文件名的示例，来自URI，例如file：// ...和content：// ....它不仅适用于Android MediaStore，也适用于EzExplorer等第三方应用程序。
public static String getFileNameByUri(Context context, Uri uri)
{
String fileName="unknown";//default fileName
Uri filePathUri = uri;
if (uri.getScheme().toString().compareTo("content")==0)
{
Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
if (cursor.moveToFirst())
{
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);//Instead of "MediaStore.Images.Media.DATA" can be used "_data"
filePathUri = Uri.parse(cursor.getString(column_index));
fileName = filePathUri.getLastPathSegment().toString();
}
}
else if (uri.getScheme().compareTo("file")==0)
{
fileName = filePathUri.getLastPathSegment().toString();
}
else
{
fileName = fileName+"_"+filePathUri.getLastPathSegment();
}
return fileName;
}
答案 5 :(得分：15)
现有的答案很好，其中一些我曾经提出过自己的答案：
我必须从URI获取路径并从路径获取URI，并且Google很难分辨出具有相同问题的任何人的差异（例如，从MediaStore获取缩略图一个你已经拥有的物理位置的视频）。前者：
/**
* Gets the corresponding path to a file from the given content:// URI
* @param selectedVideoUri The content:// URI to find the file path from
* @param contentResolver The content resolver to use to perform the query.
* @return the file path as a string
*/
private String getFilePathFromContentUri(Uri selectedVideoUri,
ContentResolver contentResolver) {
String filePath;
String[] filePathColumn = {MediaColumns.DATA};
Cursor cursor = contentResolver.query(selectedVideoUri, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
filePath = cursor.getString(columnIndex);
cursor.close();
return filePath;
}
后者（我为视频做的，但也可以通过将MediaStore.Audio（等）替换为MediaStore.Video来用于音频或文件或其他类型的存储内容）：
/**
* Gets the MediaStore video ID of a given file on external storage
* @param filePath The path (on external storage) of the file to resolve the ID of
* @param contentResolver The content resolver to use to perform the query.
* @return the video ID as a long
*/
private long getVideoIdFromFilePath(String filePath,
ContentResolver contentResolver) {
long videoId;
Log.d(TAG,"Loading file " + filePath);
// This returns us content://media/external/videos/media (or something like that)
// I pass in "external" because that's the MediaStore's name for the external
// storage on my device (the other possibility is "internal")
Uri videosUri = MediaStore.Video.Media.getContentUri("external");
Log.d(TAG,"videosUri = " + videosUri.toString());
String[] projection = {MediaStore.Video.VideoColumns._ID};
// TODO This will break if we have no matching item in the MediaStore.
Cursor cursor = contentResolver.query(videosUri, projection, MediaStore.Video.VideoColumns.DATA + " LIKE ?", new String[] { filePath }, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(projection[0]);
videoId = cursor.getLong(columnIndex);
Log.d(TAG,"Video ID is " + videoId);
cursor.close();
return videoId;
}
基本上，DATA的{{1}}列（或您查询的任何子部分）都会存储文件路径，因此您可以使用您所知道的内容查找{{1} }}字段，或使用该字段查找您想要的任何内容。
然后我进一步使用上面的MediaStore来弄清楚如何处理我的数据：
DATA答案 6 :(得分：10)
在所有情况下，这些答案都不适用于我。我不得不直接访问Google的文档https://developer.android.com/guide/topics/providers/document-provider.html，并找到了这个有用的方法：
private Bitmap getBitmapFromUri(Uri uri) throws IOException {
ParcelFileDescriptor parcelFileDescriptor =
getContentResolver().openFileDescriptor(uri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
return image;
}
您可以使用此位图在图像视图中显示它。
答案 7 :(得分：5)
function background_animation_script() {
wp_register_script('background_animation', plugins_url('/assets/js/jquery.backgroundPosition.js', __FILE__),array('jquery'),'1.0', true);
}
function hero_animation_script() {
wp_register_script('hero_animation', plugins_url('/assets/js/background-animation.js', __FILE__), array('jquery','background_animation_script'), '1.0', true);
}
function custom_scripts() {
wp_enqueue_script('jquery');
wp_enqueue_script('background_animation_script');
wp_enqueue_script('hero_animation_script');
}
add_action('wp_enqueue_scripts', 'custom_scripts');
答案 8 :(得分：3)
转移到KitKat后遇到问题的人的解决方案：
“这将从MediaProvider，DownloadsProvider和ExternalStorageProvider获取文件路径，同时回退到非官方的ContentProvider方法”https://stackoverflow.com/a/20559175/690777
答案 9 :(得分：3)
从图库中获取图片后，只需为Android 4.4（KitKat）传递以下方法中的URI：
public String getPath(Uri contentUri) {// Will return "image:x*"
String wholeID = DocumentsContract.getDocumentId(contentUri);
// 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 = getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, column, sel,
new String[] { id }, null);
String filePath = "";
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
return filePath;
}
答案 10 :(得分：2)
此解决方案适用于所有情况：
在某些情况下，从URL获取路径太难了。那为什么你需要这条路？要在其他地方复制文件？你不需要这条路。
public void SavePhotoUri (Uri imageuri, String Filename){
File FilePath = context.getDir(Environment.DIRECTORY_PICTURES,Context.MODE_PRIVATE);
try {
Bitmap selectedImage = MediaStore.Images.Media.getBitmap(context.getContentResolver(), imageuri);
String destinationImagePath = FilePath + "/" + Filename;
FileOutputStream destination = new FileOutputStream(destinationImagePath);
selectedImage.compress(Bitmap.CompressFormat.JPEG, 100, destination);
destination.close();
}
catch (Exception e) {
Log.e("error", e.toString());
}
}
答案 11 :(得分：2)
这里我将向您展示如何创建一个BROWSE按钮，当您单击它时，它将打开SD卡，您将选择一个文件，因此您将获得文件名和文件路径选定的一个：
browse.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent();
intent.setAction(Intent.ACTION_PICK);
Uri startDir = Uri.fromFile(new File("/sdcard"));
startActivityForResult(intent, PICK_REQUEST_CODE);
}
});
protected void onActivityResult(int requestCode, int resultCode, Intent intent)
{
if (requestCode == PICK_REQUEST_CODE)
{
if (resultCode == RESULT_OK)
{
Uri uri = intent.getData();
if (uri.getScheme().toString().compareTo("content")==0)
{
Cursor cursor =getContentResolver().query(uri, null, null, null, null);
if (cursor.moveToFirst())
{
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);//Instead of "MediaStore.Images.Media.DATA" can be used "_data"
Uri filePathUri = Uri.parse(cursor.getString(column_index));
String file_name = filePathUri.getLastPathSegment().toString();
String file_path=filePathUri.getPath();
Toast.makeText(this,"File Name & PATH are:"+file_name+"\n"+file_path, Toast.LENGTH_LONG).show();
}
}
}
}
}
答案 12 :(得分：2)
由于不推荐使用managedQuery，您可以尝试：
CursorLoader cursorLoader = new CursorLoader(context, uri, proj, null, null, null);
Cursor cursor = cursorLoader.loadInBackground();
答案 13 :(得分：2)
API 19及更高版本，来自Uri的图像文件路径可以完美运行。我还将检查此最新的 PIE API 28 。
public String getImageFilePath(Uri uri) {
String path = null, image_id = null;
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
if (cursor != null) {
cursor.moveToFirst();
image_id = cursor.getString(0);
image_id = image_id.substring(image_id.lastIndexOf(":") + 1);
cursor.close();
}
Cursor cursor = getContentResolver().query(android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, MediaStore.Images.Media._ID + " = ? ", new String[]{image_id}, null);
if (cursor!=null) {
cursor.moveToFirst();
path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
cursor.close();
}
return path;
}
答案 14 :(得分：1)
@PercyPercy稍微修改过的版本 - 如果出现任何问题，它就不会抛出返回null ：
public String getPathFromMediaUri(Context context, Uri uri) {
String result = null;
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = context.getContentResolver().query(uri, projection, null, null, null);
int col = cursor.getColumnIndex(MediaStore.Images.Media.DATA);
if (col >= 0 && cursor.moveToFirst())
result = cursor.getString(col);
cursor.close();
return result;
}
答案 15 :(得分：1)
现在情况特别复杂，尤其是在API级别29 Android Q之后。 这就是您应该如何从内容Uri中获取文件名
char cipher[count+1];
cipher[count+1] = '\0';
这是您获取所有Android版本的Content Uri完整路径的方法
public static String getNameFromContentUri(Context context, Uri contentUri){
Cursor returnCursor = context.getContentResolver().query(contentUri, null, null, null, null);
int nameColumnIndex = returnCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
returnCursor.moveToFirst();
String fileName = returnCursor.getString(nameColumnIndex);
return fileName;}
答案 16 :(得分：1)
我用一根衬里纸来做：
val bitmap = MediaStore.Images.Media.getBitmap(contentResolver, uri)
onActivityResult中的内容如下：
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
if (resultCode == Activity.RESULT_OK && requestCode == REQUEST_CODE_IMAGE_PICKER ) {
data?.data?.let { imgUri: Uri ->
val bitmap = MediaStore.Images.Media.getBitmap(contentResolver, imgUri)
}
}
}
答案 17 :(得分：1)
以任何方式发布 Android Q ，当MediaStore.Images.Media.DATA不再可用时？此字段在Android Q中已弃用：
此常量在API级别29中已弃用。 应用程序可能没有文件系统权限来直接访问此路径。应用程序不应尝试直接打开此路径，而应使用ContentResolver＃openFileDescriptor（Uri，String）来获取访问权限。
https://developer.android.com/reference/android/provider/MediaStore.MediaColumns.html#DATA
答案 18 :(得分：1)
我已经这样做了：
<<>> DiG 9 <<>> @localhost jooxxxxxxx.com A
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15xxxx
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;jooxxxx.xx. IN A
;; ANSWER SECTION:
joonseoan.xx. 60 IN A 18.xxx.xx.xxx
;; Query time: 27 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Sep 8 19:29:17 2018
;; MSG SIZE rcvd: 47
答案 19 :(得分：1)
尽管如此，如果您遇到问题需要获得真正的路径，您可以尝试我的答案。以上答案对我没有帮助。
解释： - 此方法获取URI，然后根据API级别检查Android设备的API级别，它将生成Real路径。 根据API级别生成实际路径方法的代码不同。
从URI获取Real路径的方法
@SuppressLint("ObsoleteSdkInt")
public String getPathFromURI(Uri uri){
String realPath="";
// SDK < API11
if (Build.VERSION.SDK_INT < 11) {
String[] proj = { MediaStore.Images.Media.DATA };
@SuppressLint("Recycle") Cursor cursor = getContentResolver().query(uri, proj, null, null, null);
int column_index = 0;
String result="";
if (cursor != null) {
column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
realPath=cursor.getString(column_index);
}
}
// SDK >= 11 && SDK < 19
else if (Build.VERSION.SDK_INT < 19){
String[] proj = { MediaStore.Images.Media.DATA };
CursorLoader cursorLoader = new CursorLoader(this, uri, proj, null, null, null);
Cursor cursor = cursorLoader.loadInBackground();
if(cursor != null){
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
realPath = cursor.getString(column_index);
}
}
// SDK > 19 (Android 4.4)
else{
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 = getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, column, sel, new String[]{ id }, null);
int columnIndex = 0;
if (cursor != null) {
columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
realPath = cursor.getString(columnIndex);
}
cursor.close();
}
}
return realPath;
}
像这样使用此方法
Log.e(TAG, "getRealPathFromURI: "+getPathFromURI(your_selected_uri) );
<强>输出： -
04-06 12：39：46.993 6138-6138 / com.app.qtm E / tag：getRealPathFromURI： /storage/emulated/0/Video/avengers_infinity_war_4k_8k-7680x4320.jpg
答案 20 :(得分：1)
简单易行。您可以从URI执行此操作，如下所示！
public void getContents(Uri uri)
{
Cursor vidCursor = getActivity.getContentResolver().query(uri, null, null,
null, null);
if (vidCursor.moveToFirst())
{
int column_index =
vidCursor .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
Uri filePathUri = Uri.parse(vidCursor .getString(column_index));
String video_name = filePathUri.getLastPathSegment().toString();
String file_path=filePathUri.getPath();
Log.i("TAG", video_name + "\b" file_path);
}
}
答案 21 :(得分：1)
在这里您可以获得文件的名称
String[] projection = {MediaStore.MediaColumns.DISPLAY_NAME};
Uri uri = data.getData();
String fileName = null;
ContentResolver cr = getActivity().getApplicationContext().getContentResolver();
Cursor metaCursor = cr.query(uri,
projection, null, null, null);
if (metaCursor != null) {
try {
if (metaCursor.moveToFirst()) {
fileName = metaCursor.getString(0);
}
} finally {
metaCursor.close();
}
}
答案 22 :(得分：0)
作为附加组件，如果在尝试打开输入流之前需要查看文件是否存在，则可以使用DocumentsContract。
（Kotlin代码）
var iStream = null
if(DocumentsContract.isDocumentUri(context,myUri)) {
val pfd: ParcelFileDescriptor? = context.contentResolver.openFileDescriptor(
myUri, "r") ?: return null
iStream = ParcelFileDescriptor.AutoCloseInputStream(pfd)
}
答案 23 :(得分：0)
由于上述答案对我不起作用，因此以下是对我有用的解决方案：
适用于> 19和<= 19 API级别。
此方法涵盖了从uri获取filePath的所有情况
/**
* Get a file path from a Uri. This will get the the path for Storage Access
* Framework Documents, as well as the _data field for the MediaStore and
* other file-based ContentProviders.
*
* @param context The activity.
* @param uri The Uri to query.
* @author paulburke
*/
public static String getPath(final Context context, final Uri uri) {
// DocumentProvider
if ( Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && 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];
}else{
Toast.makeText(context, "Could not get file path. Please try again", Toast.LENGTH_SHORT).show();
}
}
// 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;
} else {
contentUri = MediaStore.Files.getContentUri("external");
}
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;
}
答案 24 :(得分：0)
完全为我提供了来自post的修复代码：
public static String getRealPathImageFromUri(Uri uri) {
String fileName =null;
if (uri.getScheme().equals("content")) {
try (Cursor cursor = MyApplication.getInstance().getContentResolver().query(uri, null, null, null, null)) {
if (cursor.moveToFirst()) {
fileName = cursor.getString(cursor.getColumnIndexOrThrow(ediaStore.Images.Media.DATA));
}
} catch (IllegalArgumentException e) {
Log.e(mTag, "Get path failed", e);
}
}
return fileName;
}
答案 25 :(得分：0)
要获取任何类型的文件路径，请使用以下命令：
<title>答案 26 :(得分：0)
如果您的系统版本高于19，这对我非常有用，希望对您有所帮助。
@TargetApi(Build.VERSION_CODES.KITKAT)
public static String getPath(final Context context, final Uri uri) {
final boolean isOverKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isOverKitKat && 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, 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();
}
return null;
}
答案 27 :(得分：0)
public String getPath(Uri uri) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
cursor.moveToFirst();
String document_id = cursor.getString(0);
document_id = document_id.substring(document_id.lastIndexOf(":") + 1);
cursor.close();
cursor = getContentResolver().query(
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
null, MediaStore.Images.Media._ID + " = ? ", new String[]{document_id}, null);
cursor.moveToFirst();
String path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
cursor.close();
return path;
}
将文件URI转换为字符串filePath的完美工作方法
答案 28 :(得分：0)
不幸的是，上面提到的答案都没有奏效。终于我把它弄好了。
这会将您的 URI 转换为图像。
$data->source->name下面是我用来选择图像的代码。
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(
selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
答案 29 :(得分：0)
像下面这样获取 Uri。
store code range
0 s1 b 2
1 s2 a 3
然后
//* get cursor like normal
答案 30 :(得分：-1)
检查下面的方法在Oreo 8.1上也很棒。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO ManualMT-generated method stub
switch (requestCode) {
case PICKFILE_RESULT_CODE:
if (resultCode == RESULT_OK) {
try {
FilePath = data.getData().getPath();
Uri selectedImageUri = data.getData();
if (selectedImageUri.toString().contains("storage/emulated")){
String[] split = selectedImageUri.toString().split("storage/");
FilePath = "storage/"+split[1];
} else {
FilePath = ImageFilePath.getPath(getApplicationContext(), selectedImageUri);
}
recyclerview.setVisibility(View.VISIBLE);
if (FilePath == null) {
FilePath = "";
}
File file = new File(FilePath);
reqFile = RequestBody.create(MediaType.parse("multipart/form-data"), file);
image_list.add(FilePath);
composeImageAdapter.notifyDataSetChanged();
} catch (Exception e){
Toast.makeText(ClusterCreateNote.this , e.toString(),Toast.LENGTH_SHORT).show();
}
}
break;
}
}
URI路径类：
public static class ImageFilePath {
/**
* Method for return file path of Gallery image
*
* @param context
* @param uri
* @return path of the selected image file from gallery
*/
public static String getPath(final Context context, final Uri uri) {
String selection = null;
String[] selectionArgs = null;
// DocumentProvider
if (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.wifAppendedId(
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];
Log.e("typetype",type);
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;
}
selection = "_id=?";
selectionArgs = new String[]{
split[1]
};
Log.e("gddhjf",getDataColumn(context, contentUri, selection, selectionArgs));
return getDataColumn(context, contentUri, selection, selectionArgs);
}
}
if ("content".equalsIgnoreCase(uri.getScheme())) {
if (isGooglePhotosUri(uri)) {
return uri.getLastPathSegment();
}
String[] projection = {
MediaStore.Images.Media.DATA
};
Cursor cursor = null;
try {
cursor = context.getContentResolver()
.query(uri, projection, selection, selectionArgs, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
if (cursor.moveToFirst()) {
return cursor.getString(column_index);
}
} catch (Exception e) {
e.printStackTrace();
}
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
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;
}
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());
}
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
public static boolean isGooglePhotosUri(Uri uri) {
return
"com.google.android.apps.photos.content".equals(uri.getAuthority());
}
}
答案 31 :(得分：-2)
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);