Jak uzyskać bitmapę z Uri?
Jak uzyskać obiekt bitmapowy z Uri (jeśli uda mi się go zapisać w
/data/data/MYFOLDER/myimage.png
LUB file///data/data/MYFOLDER/myimage.png
) Aby użyć go w mojej aplikacji?
12 answers
. . ważne: ZOBACZ odpowiedź od @Mark Ingram poniżej i @pjv dla lepszego rozwiązania. . .
Możesz spróbować tego:public Bitmap loadBitmap(String url)
{
Bitmap bm = null;
InputStream is = null;
BufferedInputStream bis = null;
try
{
URLConnection conn = new URL(url).openConnection();
conn.connect();
is = conn.getInputStream();
bis = new BufferedInputStream(is, 8192);
bm = BitmapFactory.decodeStream(bis);
}
catch (Exception e)
{
e.printStackTrace();
}
finally {
if (bis != null)
{
try
{
bis.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
if (is != null)
{
try
{
is.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
return bm;
}
Ale pamiętaj, że ta metoda powinna być wywoływana tylko z poziomu wątku (nie GUI-thread). Jestem asynchroniczna.
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2014-02-28 11:22:29
Oto prawidłowy sposób:
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK)
{
Uri imageUri = data.getData();
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
}
}
Jeśli chcesz załadować bardzo duże obrazy, poniższy kod załaduje je w kafelkach (unikając dużych alokacji pamięci):
BitmapRegionDecoder decoder = BitmapRegionDecoder.newInstance(myStream, false);
Bitmap region = decoder.decodeRegion(new Rect(10, 10, 50, 50), null);
Zobacz ODPOWIEDŹ tutaj
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2017-05-23 12:03:09
Oto prawidłowy sposób, zachowując również informacje o zużyciu pamięci:
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK)
{
Uri imageUri = data.getData();
Bitmap bitmap = getThumbnail(imageUri);
}
}
public static Bitmap getThumbnail(Uri uri) throws FileNotFoundException, IOException{
InputStream input = this.getContentResolver().openInputStream(uri);
BitmapFactory.Options onlyBoundsOptions = new BitmapFactory.Options();
onlyBoundsOptions.inJustDecodeBounds = true;
onlyBoundsOptions.inDither=true;//optional
onlyBoundsOptions.inPreferredConfig=Bitmap.Config.ARGB_8888;//optional
BitmapFactory.decodeStream(input, null, onlyBoundsOptions);
input.close();
if ((onlyBoundsOptions.outWidth == -1) || (onlyBoundsOptions.outHeight == -1)) {
return null;
}
int originalSize = (onlyBoundsOptions.outHeight > onlyBoundsOptions.outWidth) ? onlyBoundsOptions.outHeight : onlyBoundsOptions.outWidth;
double ratio = (originalSize > THUMBNAIL_SIZE) ? (originalSize / THUMBNAIL_SIZE) : 1.0;
BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
bitmapOptions.inSampleSize = getPowerOfTwoForSampleRatio(ratio);
bitmapOptions.inDither = true; //optional
bitmapOptions.inPreferredConfig=Bitmap.Config.ARGB_8888;//
input = this.getContentResolver().openInputStream(uri);
Bitmap bitmap = BitmapFactory.decodeStream(input, null, bitmapOptions);
input.close();
return bitmap;
}
private static int getPowerOfTwoForSampleRatio(double ratio){
int k = Integer.highestOneBit((int)Math.floor(ratio));
if(k==0) return 1;
else return k;
}
Wywołanie getBitmap() z postu Marka Ingrama wywołuje również decodeStream (), więc nie tracisz żadnej funkcjonalności.
Bibliografia:
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2017-05-23 11:33:26
try
{
Bitmap bitmap = MediaStore.Images.Media.getBitmap(c.getContentResolver() , Uri.parse(paths));
}
catch (Exception e)
{
//handle exception
}
I ścieżka yes musi być w formacie podobnym do tego
file:///mnt/sdcard/filename.jpg
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2016-01-21 04:48:25
private void uriToBitmap(Uri selectedFileUri) {
try {
ParcelFileDescriptor parcelFileDescriptor =
getContentResolver().openFileDescriptor(selectedFileUri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
} catch (IOException e) {
e.printStackTrace();
}
}
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2015-08-27 15:12:29
Możesz pobrać bitmapę z uri w następujący sposób
Bitmap bitmap = null;
try {
bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
} catch (IOException e) {
e.printStackTrace();
}
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2018-04-27 06:50:04
Rozwiązanie jest zbyt proste:
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), uri);
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2018-05-28 17:26:14
Użyj metody startActivityForResult jak poniżej
startActivityForResult(new Intent(Intent.ACTION_PICK).setType("image/*"), PICK_IMAGE);
I możesz uzyskać wynik w ten sposób:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode != RESULT_OK) {
return;
}
switch (requestCode) {
case PICK_IMAGE:
Uri imageUri = data.getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
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2017-07-11 10:28:41
Uri imgUri = data.getData();
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imgUri);
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/doraprojects.net/template/agent.layouts/content.php on line 54
2018-08-02 11:01:55
Możesz wykonać tę strukturę:
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch(requestCode) {
case 0:
if(resultCode == RESULT_OK){
Uri selectedImage = imageReturnedIntent.getData();
Bundle extras = imageReturnedIntent.getExtras();
bitmap = extras.getParcelable("data");
}
break;
}
Dzięki temu można łatwo przekonwertować uri na bitmapę. hope help u.
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2017-06-20 15:16:15
Pełna metoda pobierania Uri obrazu z mobilnej galerii.....
Protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult (requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
Uri filePath = data.getData();
try {
//Getting the Bitmap from Gallery
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
rbitmap = getResizedBitmap(bitmap, 250);//Setting the Bitmap to ImageView
userImage = getStringImage(rbitmap);
imageViewUserImage.setImageBitmap(rbitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
}
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2017-11-25 14:06:01
Bitmap imgbitmap = MediaStore.Obrazy.Media.getBitmap (this.getContentResolver (), selectedImageUri);
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2018-03-28 11:51:13