Álv*_*aro 199 android uri path android-4.4-kitkat
在Android 4.4(KitKat)中访问新图库之前,我使用此方法在SD卡上获得了真正的路径:
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
startManagingCursor(cursor);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
现在,Intent.ACTION_GET_CONTENT返回不同的数据:
之前:
content://media/external/images/media/62
现在:
content://com.android.providers.media.documents/document/image:62
我怎么能设法获得SD卡上的真实路径？
Pau*_*rke 500
这将从MediaProvider,DownloadsProvider和ExternalStorageProvider获取文件路径,同时回退到您提到的非官方ContentProvider方法.
/**
* 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 context.
* @param uri The Uri to query.
* @author paulburke
*/
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];
}
// 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 getDataColumn(context, uri, null, 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, 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;
}
/**
* @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());
}
这些来自我的开源库aFileChooser.
Vik*_*ram 119
注意:此答案解决了部分问题.要获得完整的解决方案(以库的形式),请查看Paul Burke的答案.
您可以使用URI获取document id,然后查询MediaStore.Images.Media.EXTERNAL_CONTENT_URI或MediaStore.Images.Media.INTERNAL_CONTENT_URI(根据SD卡情况).
获取文档ID:
// Will return "image:x*"
String wholeID = DocumentsContract.getDocumentId(uriThatYouCurrentlyHave);
// 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();
参考:我无法找到这个解决方案的帖子.我想问原始海报在这里做出贡献.今晚会再看一些.
gun*_*ess 70
以下答案由/sf/users/215787771/写在一个不再存在的页面上,因为他没有足够的回复来回答问题,我发布了它.没有我的学分.
public String getImagePath(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;
}
编辑:代码上有一个流程; 如果设备有多个外部存储器(外部SD卡,外部USB等),则代码上方将无法使用非主存储器.
Com*_*are 28
在使用KitKat访问新图库之前,我使用此方法在sdcard中获得了真正的路径
这永远不可靠.不要求Uri您从一个ACTION_GET_CONTENT或一个ACTION_PICK请求返回的内容必须由索引编制索引MediaStore,或者甚至必须表示文件系统上的文件.在Uri可以,例如,代表一个流,其中一个加密的文件进行解密你的飞行.
我怎么能设法获得SD卡中的真实路径？
不要求存在与之对应的文件Uri.
是的,我真的需要一条路
然后将文件从流中复制到您自己的临时文件中,并使用它.更好的是,只需直接使用流,并避免临时文件.
我已经为Intent.ACTION_PICK更改了我的Intent.ACTION_GET_CONTENT
这对你的情况没有帮助.没有要求ACTION_PICK响应是针对Uri文件系统上有文件的文件,你可以以某种方式神奇地推导出来.
这个答案是基于你有点模糊的描述.我假设您通过操作触发了一个意图:Intent.ACTION_GET_CONTENT
现在你content://com.android.providers.media.documents/document/image:62回来而不是以前的媒体提供者URI,对吗？
在Android 4.4(KitKat)上,新的DocumentsActivity在Intent.ACTION_GET_CONTENT被触发时打开,从而导致网格视图(或列表视图),您可以在其中选择图像,这将返回以下URI到调用上下文(示例):( content://com.android.providers.media.documents/document/image:62这些是URI对于新文档提供者,它通过向客户提供通用文档提供者URI来抽象出基础数据.
但是,您可以Intent.ACTION_GET_CONTENT使用DocumentsActivity中的抽屉访问图库和响应的其他活动(从左向右拖动,您将看到带有图库的抽屉UI可供选择).就像KitKat之前一样.
如果你仍然选择DocumentsActivity类并需要文件URI,你应该能够执行以下操作(警告这是hacky!)查询(使用contentresolver):content://com.android.providers.media.documents/document/image:62URI并从游标中读取_display_name值.这是一些独特的名称(只是本地文件上的文件名),并在选择(查询时)到mediaprovider以从此处获取与此选择对应的正确行时使用该名称,您也可以获取文件URI.
可以在此处找到访问文档提供程序的推荐方法(获取输入流或文件描述符以读取文件/位图):
小智 8
我有同样的问题.我需要文件名,以便能够将其上传到网站.
如果我把意图改为PICK,它对我有用.这在AVD for Android 4.4和AVD for Android 2.1中进行了测试.
添加权限READ_EXTERNAL_STORAGE:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
改变意图:
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI
);
startActivityForResult(i, 66453666);
/* OLD CODE
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(
Intent.createChooser( intent, "Select Image" ),
66453666
);
*/
我没有必要更改我的代码获取实际路径:
// Convert the image URI to the direct file system path of the image file
public String mf_szGetRealPathFromURI(final Context context, final Uri ac_Uri )
{
String result = "";
boolean isok = false;
Cursor cursor = null;
try {
String[] proj = { MediaStore.Images.Media.DATA };
cursor = context.getContentResolver().query(ac_Uri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
result = cursor.getString(column_index);
isok = true;
} finally {
if (cursor != null) {
cursor.close();
}
}
return isok ? result : "";
}
试试这个:
//KITKAT
i = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, CHOOSE_IMAGE_REQUEST);
在onActivityResult中使用以下内容:
Uri selectedImageURI = data.getData();
input = c.getContentResolver().openInputStream(selectedImageURI);
BitmapFactory.decodeStream(input , null, opts);
这是Paul Burke答案的更新版本.在Android 4.4(KitKat)下面的版本中,我们没有DocumentsContract类.
为了在KitKat下面的版本上工作,创建这个类:
public class DocumentsContract {
private static final String DOCUMENT_URIS =
"com.android.providers.media.documents " +
"com.android.externalstorage.documents " +
"com.android.providers.downloads.documents " +
"com.android.providers.media.documents";
private static final String PATH_DOCUMENT = "document";
private static final String TAG = DocumentsContract.class.getSimpleName();
public static String getDocumentId(Uri documentUri) {
final List<String> paths = documentUri.getPathSegments();
if (paths.size() < 2) {
throw new IllegalArgumentException("Not a document: " + documentUri);
}
if (!PATH_DOCUMENT.equals(paths.get(0))) {
throw new IllegalArgumentException("Not a document: " + documentUri);
}
return paths.get(1);
}
public static boolean isDocumentUri(Uri uri) {
final List<String> paths = uri.getPathSegments();
Logger.v(TAG, "paths[" + paths + "]");
if (paths.size() < 2) {
return false;
}
if (!PATH_DOCUMENT.equals(paths.get(0))) {
return false;
}
return DOCUMENT_URIS.contains(uri.getAuthority());
}
}
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