Cómo convertir un elemento de diseño a un mapa de bits?
Me gustaría establecer un determinado Drawable
como fondo de pantalla del dispositivo, pero todas las funciones de fondo de pantalla aceptan Bitmap
s solamente. No puedo usar WallpaperManager
porque soy pre 2.1.
Además, mis elementos de diseño se descargan de la web y no residen en R.drawable
.
14 answers
Este fragmento de código ayuda.
Bitmap icon = BitmapFactory.decodeResource(context.getResources(),
R.drawable.icon_resource);
Aquí una versión donde se descarga la imagen.
String name = c.getString(str_url);
URL url_value = new URL(name);
ImageView profile = (ImageView)v.findViewById(R.id.vdo_icon);
if (profile != null) {
Bitmap mIcon1 =
BitmapFactory.decodeStream(url_value.openConnection().getInputStream());
profile.setImageBitmap(mIcon1);
}
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2016-02-08 16:09:08
public static Bitmap drawableToBitmap (Drawable drawable) {
Bitmap bitmap = null;
if (drawable instanceof BitmapDrawable) {
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
if(bitmapDrawable.getBitmap() != null) {
return bitmapDrawable.getBitmap();
}
}
if(drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
} else {
bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
}
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
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2015-06-23 18:13:58
Esto convierte un BitmapDrawable en un Bitmap.
Drawable d = ImagesArrayList.get(0);
Bitmap bitmap = ((BitmapDrawable)d).getBitmap();
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2012-07-11 10:22:06
A Drawable
se puede dibujar sobre a Canvas
, y a Canvas
se puede respaldar con a Bitmap
:
(Actualizado para manejar una conversión rápida para BitmapDrawable
s y para asegurar que el Bitmap
creado tiene un tamaño válido)
public static Bitmap drawableToBitmap (Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable)drawable).getBitmap();
}
int width = drawable.getIntrinsicWidth();
width = width > 0 ? width : 1;
int height = drawable.getIntrinsicHeight();
height = height > 0 ? height : 1;
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
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2014-04-16 18:10:30
Utilice este código:
Bitmap bitmap= BitmapFactory.decodeResource(context.getResources(),
R.drawable.icon_name);
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2013-08-07 13:23:35
Muy simple
Bitmap tempBMP = BitmapFactory.decodeResource(getResources(),R.drawable.image);
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2013-03-21 18:21:30
MÉTODO 1 : O bien puede convertir directamente a mapa de bits como este
Bitmap myLogo = BitmapFactory.decodeResource(context.getResources(), R.drawable.my_drawable);
MÉTODO 2 : Incluso puede convertir el recurso en el elemento de diseño y de eso puede obtener un mapa de bits como este
Bitmap myLogo = ((BitmapDrawable)getResources().getDrawable(R.drawable.logo)).getBitmap();
For API > 22 getDrawable
method moved to the ResourcesCompat
class so for that you do something like this
Bitmap myLogo = ((BitmapDrawable) ResourcesCompat.getDrawable(context.getResources(), R.drawable.logo, null)).getBitmap();
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2018-02-02 05:22:48
Tal vez esto ayude a alguien...
De PictureDrawable a Bitmap, use:
private Bitmap pictureDrawableToBitmap(PictureDrawable pictureDrawable){
Bitmap bmp = Bitmap.createBitmap(pictureDrawable.getIntrinsicWidth(), pictureDrawable.getIntrinsicHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(bmp);
canvas.drawPicture(pictureDrawable.getPicture());
return bmp;
}
... aplicadas como tales:
Bitmap bmp = pictureDrawableToBitmap((PictureDrawable) drawable);
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2012-02-08 19:08:03
Así que después de mirar (y usar) las otras respuestas, parece que todas manejan ColorDrawable
y PaintDrawable
mal. (Especialmente en lollipop) parecía que Shader
s fueron retocados por lo que los bloques sólidos de colores no se manejaron correctamente.
Estoy usando el siguiente código ahora:
public static Bitmap drawableToBitmap(Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable) drawable).getBitmap();
}
// We ask for the bounds if they have been set as they would be most
// correct, then we check we are > 0
final int width = !drawable.getBounds().isEmpty() ?
drawable.getBounds().width() : drawable.getIntrinsicWidth();
final int height = !drawable.getBounds().isEmpty() ?
drawable.getBounds().height() : drawable.getIntrinsicHeight();
// Now we check we are > 0
final Bitmap bitmap = Bitmap.createBitmap(width <= 0 ? 1 : width, height <= 0 ? 1 : height,
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
A diferencia de los demás, si llama a setBounds
en el Drawable
antes de pedir convertirlo en un mapa de bits, dibujará el mapa de bits en el tamaño correcto!
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2014-12-18 09:54:24
Aquí hay una mejor resolución
public static Bitmap drawableToBitmap (Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable)drawable).getBitmap();
}
Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
public static InputStream bitmapToInputStream(Bitmap bitmap) {
int size = bitmap.getHeight() * bitmap.getRowBytes();
ByteBuffer buffer = ByteBuffer.allocate(size);
bitmap.copyPixelsToBuffer(buffer);
return new ByteArrayInputStream(buffer.array());
}
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2017-05-23 12:26:38
Android proporciona una solución no directa: BitmapDrawable
. Para obtener el mapa de bits, tendremos que proporcionar el id de recurso R.drawable.flower_pic
a a BitmapDrawable
y luego enviarlo a a Bitmap
.
Bitmap bm = ((BitmapDrawable) getResources().getDrawable(R.drawable.flower_pic)).getBitmap();
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2014-05-30 01:03:28
Aquí está la bonita versión Kotlin de la respuesta proporcionada por @Chris.Jenkins aquí: https://stackoverflow.com/a/27543712/1016462
fun Drawable.toBitmap(): Bitmap {
if (this is BitmapDrawable) {
return bitmap
}
val width = if (bounds.isEmpty) intrinsicWidth else bounds.width()
val height = if (bounds.isEmpty) intrinsicHeight else bounds.height()
return Bitmap.createBitmap(width.nonZero(), height.nonZero(), Bitmap.Config.ARGB_8888).also {
val canvas = Canvas(it)
setBounds(0, 0, canvas.width, canvas.height)
draw(canvas)
}
}
private fun Int.nonZero() = if (this <= 0) 1 else this
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2017-12-29 21:06:52
Use esto code.it le ayudará a lograr su objetivo.
Bitmap bmp=BitmapFactory.decodeResource(getResources(), R.drawable.profileimage);
if (bmp!=null) {
Bitmap bitmap_round=getRoundedShape(bmp);
if (bitmap_round!=null) {
profileimage.setImageBitmap(bitmap_round);
}
}
public Bitmap getRoundedShape(Bitmap scaleBitmapImage) {
int targetWidth = 100;
int targetHeight = 100;
Bitmap targetBitmap = Bitmap.createBitmap(targetWidth,
targetHeight,Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(targetBitmap);
Path path = new Path();
path.addCircle(((float) targetWidth - 1) / 2,
((float) targetHeight - 1) / 2,
(Math.min(((float) targetWidth),
((float) targetHeight)) / 2),
Path.Direction.CCW);
canvas.clipPath(path);
Bitmap sourceBitmap = scaleBitmapImage;
canvas.drawBitmap(sourceBitmap,
new Rect(0, 0, sourceBitmap.getWidth(),
sourceBitmap.getHeight()),
new Rect(0, 0, targetWidth, targetHeight), new Paint(Paint.FILTER_BITMAP_FLAG));
return targetBitmap;
}
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2014-05-30 12:13:47
// get image path from gallery
protected void onActivityResult(int requestCode, int resultcode, Intent intent) {
super.onActivityResult(requestCode, resultcode, intent);
if (requestCode == 1) {
if (intent != null && resultcode == RESULT_OK) {
Uri selectedImage = intent.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
filePath = cursor.getString(columnIndex);
//display image using BitmapFactory
cursor.close(); bmp = BitmapFactory.decodeFile(filepath);
iv.setBackgroundResource(0);
iv.setImageBitmap(bmp);
}
}
}
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2015-04-24 22:03:10