我有一个应用程序，我使用相机捕获视频。我可以获得视频的文件路径，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String变量bedroom的Uri。
答案 0 :(得分：156)
请尝试以下代码
Uri.fromFile(new File("/sdcard/sample.jpg"))
答案 1 :(得分：5)
如果您确实想获得类似content//media/external/video/media/18576之类的东西（例如，您的视频mp4绝对路径），而不仅仅是file///storage/emulated/0/DCIM/Camera/20141219_133139.mp4，则为该问题的正常答案：
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()仅返回类似file///storage/emulated/0/*的内容，它是sdcard上文件的简单绝对路径，但带有file//前缀（方案）
您还可以使用Android的content数据库获取MediaStore uri
测试（返回Uri.fromFile和返回MediaScannerConnection的内容）
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
答案 2 :(得分：4)
如果您想从字符串文件路径中获取 Uri 路径。此代码也适用于 androidQ。
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>
答案 3 :(得分：1)
下面的代码在18 API之前正常工作： -
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);
}
以下代码使用kitkat： -
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());
}
请参阅以下链接了解更多信息： -