我有一个onActivityResult从一个mediastore图像选择返回，我可以获得一个图像使用以下URI:
Uri selectedImage = data.getData();
将this转换为字符串会得到:
content://media/external/images/media/47
或路径给出:
/external/images/media/47
然而，我似乎找不到一种方法将其转换为绝对路径，因为我想将图像加载到位图中，而不必复制到某个地方。我知道这可以使用URI和内容解析器来完成，但这似乎在重新启动手机时中断，我猜MediaStore在重新启动之间没有保持其编号相同。
当前回答
由于managedQuery已弃用，您可以尝试:
CursorLoader cursorLoader = new CursorLoader(context, uri, proj, null, null, null);
Cursor cursor = cursorLoader.loadInBackground();
其他回答
这个解决方案适用于所有情况:
在某些情况下，从URL中获取路径太难了。那你为什么需要路径?把文件复制到其他地方?你不需要路径。
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());
}
}
我是这样做的:
Uri queryUri = MediaStore.Files.getContentUri("external");
String columnData = MediaStore.Files.FileColumns.DATA;
String columnSize = MediaStore.Files.FileColumns.SIZE;
String[] projectionData = {MediaStore.Files.FileColumns.DATA};
String name = null;
String size = null;
Cursor cursor = getContentResolver().query(contentURI, null, null, null, null);
if ((cursor != null)&&(cursor.getCount()>0)) {
int nameIndex = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
int sizeIndex = cursor.getColumnIndex(OpenableColumns.SIZE);
cursor.moveToFirst();
name = cursor.getString(nameIndex);
size = cursor.getString(sizeIndex);
cursor.close();
}
if ((name!=null)&&(size!=null)){
String selectionNS = columnData + " LIKE '%" + name + "' AND " +columnSize + "='" + size +"'";
Cursor cursorLike = getContentResolver().query(queryUri, projectionData, selectionNS, null, null);
if ((cursorLike != null)&&(cursorLike.getCount()>0)) {
cursorLike.moveToFirst();
int indexData = cursorLike.getColumnIndex(columnData);
if (cursorLike.getString(indexData) != null) {
result = cursorLike.getString(indexData);
}
cursorLike.close();
}
}
return result;
@PercyPercy的轻微修改版本-它不会抛出，如果有任何错误，它只返回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;
}
检查下面的方法是工作awesome也奥利奥8.1 ..
@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
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());
}
}
像下面这样获取Uri。
//* get cursor like normal
Then
while (cursor.moveToNext()) {
Uri uri = ContentUris.withAppendedId(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, id);
}
