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。
下面API 19使用这段代码从URI中获取文件路径:
public String getRealPathFromURI(Context context, Uri contentUri) {
Cursor cursor = null;
try {
String[] proj = { MediaStore.Images.Media.DATA };
cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} finally {
if (cursor != null) {
cursor.close();
}
}
}
如果你的系统版本在19以上,这对我来说是完美的,希望这能帮助你。
@TargetApi(Build.VERSION_CODES.KITKAT)
public static String getPath(final Context context, final Uri uri) {
final boolean isOverKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isOverKitKat && 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.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 the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
这是我的例子获取文件名,从URI file://…内容://... .这是为我工作,不仅与Android MediaStore,而且与第三方应用程序,如EzExplorer。
public static String getFileNameByUri(Context context, Uri uri)
{
String fileName="unknown";//default fileName
Uri filePathUri = uri;
if (uri.getScheme().toString().compareTo("content")==0)
{
Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
if (cursor.moveToFirst())
{
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);//Instead of "MediaStore.Images.Media.DATA" can be used "_data"
filePathUri = Uri.parse(cursor.getString(column_index));
fileName = filePathUri.getLastPathSegment().toString();
}
}
else if (uri.getScheme().compareTo("file")==0)
{
fileName = filePathUri.getLastPathSegment().toString();
}
else
{
fileName = fileName+"_"+filePathUri.getLastPathSegment();
}
return fileName;
}
我用一行代码做到这一点:
val bitmap = MediaStore.Images.Media。getBitmap (contentResolver uri)
在onActivityResult中看起来是这样的:
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
if (resultCode == Activity.RESULT_OK && requestCode == REQUEST_CODE_IMAGE_PICKER ) {
data?.data?.let { imgUri: Uri ->
val bitmap = MediaStore.Images.Media.getBitmap(contentResolver, imgUri)
}
}
}
试试这个
不过,如果你想要得到真正的答案,你可以试试我的答案。以上答案对我没有帮助。
解释:-这个方法获取URI,然后检查你的Android设备的API级别,根据API级别,它将生成真实路径。生成真实路径方法的代码根据API级别不同而不同。
method to get the Real path from URI
@SuppressLint("ObsoleteSdkInt")
public String getPathFromURI(Uri uri){
String realPath="";
// SDK < API11
if (Build.VERSION.SDK_INT < 11) {
String[] proj = { MediaStore.Images.Media.DATA };
@SuppressLint("Recycle") Cursor cursor = getContentResolver().query(uri, proj, null, null, null);
int column_index = 0;
String result="";
if (cursor != null) {
column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
realPath=cursor.getString(column_index);
}
}
// SDK >= 11 && SDK < 19
else if (Build.VERSION.SDK_INT < 19){
String[] proj = { MediaStore.Images.Media.DATA };
CursorLoader cursorLoader = new CursorLoader(this, uri, proj, null, null, null);
Cursor cursor = cursorLoader.loadInBackground();
if(cursor != null){
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
realPath = cursor.getString(column_index);
}
}
// SDK > 19 (Android 4.4)
else{
String wholeID = DocumentsContract.getDocumentId(uri);
// 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);
int columnIndex = 0;
if (cursor != null) {
columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
realPath = cursor.getString(columnIndex);
}
cursor.close();
}
}
return realPath;
}
Use this method like this
Log.e(TAG, "getRealPathFromURI: "+getPathFromURI(your_selected_uri) );
输出:
04-06 12:39:46,993 6138-6138/com。qtm E/tag: getrealthfro到处都是:
/存储/ emulated / 0 /视频/ avengers_infinity_war_4k_8k-7680x4320。jpg