在Android中将文件路径转换为Uri
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【中文标题】在Android中将文件路径转换为Uri【英文标题】:Convert a file path to Uri in Android 【发布时间】:2015-02-20 13:40:36 【问题描述】:我有一个应用程序,我可以在其中使用相机拍摄视频。我可以获取视频的文件路径,但我需要它作为 Uri。
我得到的文件路径:
/storage/emulated/0/DCIM/Camera/20141219_133139.mp4
我需要的是这样的:
content//media/external/video/media/18576.
这是我的代码。
protected void onActivityResult(int requestCode, int resultCode, Intent data)
// if the result is capturing Image
if (requestCode == CAMERA_CAPTURE_VIDEO_REQUEST_CODE)
if (resultCode == RESULT_OK)
// video successfully recorded
// preview the recorded video
// selectedImageUri = data.getData();
// Uri selectedImage = data.getData();
previewVideo();
tv1.setText(String.valueOf((fileUri.getPath())));
String bedroom=String.valueOf((fileUri.getPath()));
Intent i = new Intent();
i.putExtra(bhk1.BEDROOM2, bedroom);
setResult(RESULT_OK,i);
btnRecordVideo.setText("ReTake Video");
else if (resultCode == RESULT_CANCELED)
// user cancelled recording
Toast.makeText(getApplicationContext(),
"User cancelled video recording", Toast.LENGTH_SHORT)
.show();
else
// failed to record video
Toast.makeText(getApplicationContext(),
"Sorry! Failed to record video", Toast.LENGTH_SHORT)
.show();
我需要来自字符串变量 bedroom
的 Uri。
【问题讨论】:
Get content uri from file path in android的可能重复// Uri selectedImage = data.getData();
。嗯..那不是你的uri吗?
fileUri.getPath()
。什么是文件路径?你应该告诉/显示!
I am getting the path is /storage/emulated/0/DCIM/Camera/20141219_133139.mp4
。在哪里?我们必须猜测?
我录制视频后存储路径路径为/storage/emulated/0/DCIM/Camera/20141219_133139.mp4。我需要得到这样的内容//media/external/video/media/ 18576
【参考方案1】:
如果你想从字符串文件路径中获取 Uri 路径。这个代码也将在 androidQ 中工作。
String outputFile = context.getExternalFilesDir("DirName") + "/fileName.extension";
File file = new File(outputFile);
Log.e("OutPutFile",outputFile);
Uri uri = FileProvider.getUriForFile(Activity.this,
BuildConfig.APPLICATION_ID + ".provider",file);
在应用程序标签清单中声明提供者
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="$applicationId.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
在 res -> xml ->provider_paths.xml
<paths>
<external-path name="external_files" path="."/>
</paths>
【讨论】:
【参考方案2】:如果您真的想获得类似 content//media/external/video/media/18576
的信息(例如,对于您的视频 mp4 绝对路径),而不仅仅是 file///storage/emulated/0/DCIM/Camera/20141219_133139.mp4
,则此问题的正常答案:
MediaScannerConnection.scanFile(this,
new String[] file.getAbsolutePath() , null,
new MediaScannerConnection.OnScanCompletedListener()
public void onScanCompleted(String path, Uri uri)
Log.i("onScanCompleted", uri.getPath());
);
接受的答案是错误的(因为它不会返回content//media/external/video/media/*
)
Uri.fromFile(file).toString()
只返回类似file///storage/emulated/0/*
的东西,它是sdcard 上文件的简单绝对路径,但带有file//
前缀(方案)
您也可以使用Android的MediaStore
数据库获取content
uri
测试(返回 Uri.fromFile
和返回 MediaScannerConnection
):
File videoFile = new File("/storage/emulated/0/video.mp4");
Log.i(TAG, Uri.fromFile(videoFile).toString());
MediaScannerConnection.scanFile(this, new String[] videoFile.getAbsolutePath() , null,
(path, uri) -> Log.i(TAG, uri.toString()));
输出:
我/测试:file:///storage/emulated/0/video.mp4
我/测试:content://media/external/video/media/268927
【讨论】:
content//
和 file///
之间有什么区别,我问,因为两者都适用于我的情况
请提供一个获取路径并返回uri的函数。
@aryanknp 了解 MediaStore
这个答案是唯一有效的答案。以上接受的答案并不能解决问题。【参考方案3】:
请尝试以下代码
Uri.fromFile(new File("/sdcard/sample.jpg"))
【讨论】:
看看这里可能会有所帮助:***.com/questions/38200282/… Kotlin 可以使用file.toUri()
@grrigore 我认为您的意思是 toURI() 属于 java.net 包。
@KMC developer.android.com/reference/kotlin/androidx/core/net/… 这是我说的那个【参考方案4】:
以下代码在 18 API 之前可以正常工作:-
public String getRealPathFromURI(Uri contentUri)
// can post image
String [] proj=MediaStore.Images.Media.DATA;
Cursor cursor = managedQuery( contentUri,
proj, // Which columns to return
null, // WHERE clause; which rows to return (all rows)
null, // WHERE clause selection arguments (none)
null); // Order-by clause (ascending by name)
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
在 kitkat 上使用以下代码:-
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());
查看以下链接了解更多信息:-
https://github.com/iPaulPro/aFileChooser/blob/master/aFileChooser/src/com/ipaulpro/afilechooser/utils/FileUtils.java
【讨论】:
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