我不会打印出整个堆栈跟踪记录,因为它很大,但是从本质上来说,我正在尝试为文件'document / image:136635'创建一个FileHandle,但没有得到这样的文件或目录。
com.badlogic.gdx.utils.GdxRuntimeException:无法加载文件:/ document / image:136635
引起原因:android.system.ErrnoException:打开失败:ENOENT(无此类文件或目录)
So I'm using the path 'document/image:136635' because I launched an activity for the android gallery app so the user can select a photo of themselves for the avatar. The selection seems to works ok, we can select an image and my program continues afterwards, but they when I try to create a filehandle for the image so I can actually draw it in my game I have problems. When I analyse the data returned from the activity the path of the photo they selected comes back as 'document/image:136635'. Is that a valid path for an image ordinarily? If I use a file viewer on my phone I can see that there is a document folder but nothing is in it.
Any advice appreciated. Thanks.
edit: So the info in the URI is (in order):
image:136635
image/jpeg
IMG_20190702_175942.jpg
1562065182000
5
1285506
因此,我可以获取实际的文件名,但仍然无法获取真实的路径?我不认为...
private static final int GALLERY_PICK = 1;
Intent galleryIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, GALLERY_PICK);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == GALLERY_PICK && resultCode == RESULT_OK && data != null &&
data.getData() != null) {
Uri uri = data.getData();
try {
String filePath = getPathNew(this,uri); //return actual path
} catch (IOException e) {
e.printStackTrace();
}
}
}
获取实际路径
@SuppressLint("NewApi")
public static String getPathNew(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;
}
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());
}
在清单中添加文件READ WRITE
权限
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
不幸的是,uri.getPath()似乎没有返回实际的文件路径。例如,它返回/ document / image:136635,实际上文件是/pictures/screenshots/Screenshot_2019-07-02-27-34-789.jpeg。我需要实际的文件路径,以便创建libgdx纹理
@ user8810083参见我编辑过的答案。getPathNew()将为您提供图像的实际路径。
我想越来越近了,但是现在我被新的getpathnew方法拒绝了权限。我在这篇文章中尝试了该解决方案stackoverflow.com/a/33292700/8810083,但是在使ActivityCompat与libgdx配合使用时遇到一些困难
在api 23之后,还不够。您可以看到他们在该线程中进行了解释
getDataColumn(context,uri,null,null); 将在api 19之后返回路径