I am developing custom view for android. For that I want give a user ability to select and image using just like when using ImageView
In attr.xml I added bellow code.
<declare-styleable name="DiagonalCut">
<attr name="altitude" format="dimension"/>
<attr name="background_image" format="reference"/>
</declare-styleable>
In custom view I get this value as a Drawable which was provided in xml as app:background_image="#drawable/image"
TypedArray typedArray = getContext().obtainStyledAttributes(arr, R.styleable.DiagonalCut);
altitude = typedArray.getDimensionPixelSize(R.styleable.DiagonalCut_altitude,10);
sourceImage = typedArray.getDrawable(R.styleable.DiagonalCut_background_image);
I want to create a Bitmap using this sourceImage which is a Drawable object.
If the way I'm going wrong please provide an alternative.
You can convert your Drawable to Bitmap like this (for resource):
Bitmap icon = BitmapFactory.decodeResource(context.getResources(),
R.drawable.drawable_source);
OR
If you've it stored in a variable, you can use this :
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;
}
More details
Because I need my drawable as bitmap descriptor, I convert my resource to a Drawable then to a Bitmap.
But I want to change its color, So I used the following code found somewhere here:
private 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());
int iColor = Color.parseColor("#006f00");
drawable.setColorFilter(iColor, PorterDuff.Mode.SRC_ATOP);
drawable.draw(canvas);
return bitmap;
}
But the drawable's color remains black.
Can you please tell me why and how to get it working?
This converts a BitmapDrawable to a Bitmap.
Drawable d = ImagesArrayList.get(0);
Bitmap bitmap = ((BitmapDrawable)d).getBitmap();
And for changing bitmap's color see below link
How to change Bitmap image color in android?
Paint p = new Paint();
ColorFilter filter = new LightingColorFilter(Color.RED, 0);
p.setColorFilter(filter);
canvas.drawBitmap(bitmap, 0, 0, p);
To convert drawable into bitmap use this -
Bitmap icon = BitmapFactory.decodeResource(context.getResources(),
R.drawable.icon_resource);
You can change bitmap pixels color by this-
int[] pixels = new int[myBitmap.getHeight()*myBitmap.getWidth()];
myBitmap.getPixels(pixels, 0, myBitmap.getWidth(), 0, 0, myBitmap.getWidth(), myBitmap.getHeight());
for (int i=0; i<myBitmap.getWidth()*5; i++)
pixels[i] = Color.BLUE;
myBitmap.setPixels(pixels, 0, myBitmap.getWidth(), 0, 0, myBitmap.getWidth(), myBitmap.getHeight());
I think the problem could be PorterDuff.Mode.SRC_ATOP, the method you use for apply the filter. I don't know specifically SRC_ATOP but this link explains all of them.
I don't know how your image is composed, but I'd use DST_ATOP instead of SRC_ATOP.
EDIT: I presumed that this code won't return in the case you are analizing, 'cause if it returns the filter obviously is never reached.
if (drawable instanceof BitmapDrawable)
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
if(bitmapDrawable.getBitmap() != null) {
return bitmapDrawable.getBitmap();
}
}
I'm looking for a way on how can I convert a TransitionDrawable to Drawable or To bitmap to be able to save the Image.
I have been looking for a while and I tried a lot methods and no clue.
here a code what I have tried :
TransitionDrawable drawable = (TransitionDrawable) profil.getDrawable();
Drawable drawalb = drawable.mutate();
final Bitmap bitmap = ((BitmapDrawable) drawalb).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] image = stream.toByteArray();
I wantn't able to do that, but I have found another clue, I was able to get the bitmap directly before converting it to TransitionDrawable.
A transitionDrawable is an array of drawable (Defnition).
so;
1.Get the drawable you want, depending on its index
2.covert it to a bitmap (As cited here by Andre)
TransitionDrawable Tdrawable =(TransitionDrawable) imageView.getDrawable();
Drawable mDrawable = Tdrawable.getDrawable;
bitmap = drawableToBitmap(mDrawable);
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;
}
This question already has an answer here:
Mirrored text in textview?
(1 answer)
Closed 9 years ago.
How to convert text into bitmap in android? I am facing an issue where I need to convert text to bitmap so that I can create the mirror image of the text.
this is how you get a bitmap from a view. (I assumed that with 'text' you were referring to textview
private static Bitmap get_view_image(View view) {
int w = view.getWidth();
int h = view.getHeight();
Bitmap bmp = Bitmap.createBitmap(w, h,Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bmp);
canvas.drawColor(Color.WHITE);
Drawable bgDrawable = view.getBackground();
if (bgDrawable!=null) {
bgDrawable.draw(canvas);
}
else {
canvas.drawColor(Color.WHITE);
}
view.draw(canvas);
return bmp;
}
You can directly mirror the bitmap (if you have one) using
BitmapDrawable flip(BitmapDrawable d)
{
Matrix m = new Matrix();
m.preScale(-1, 1);
Bitmap src = d.getBitmap();
Bitmap dst = Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), m, false);
dst.setDensity(DisplayMetrics.DENSITY_DEFAULT);
return new BitmapDrawable(dst);
}
I would like to set a certain Drawable as the device's wallpaper, but all wallpaper functions accept Bitmaps only. I cannot use WallpaperManager because I'm pre 2.1.
Also, my drawables are downloaded from the web and do not reside in R.drawable.
This piece of code helps.
Bitmap icon = BitmapFactory.decodeResource(context.getResources(),
R.drawable.icon_resource);
Here a version where the image gets downloaded.
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);
}
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;
}
This converts a BitmapDrawable to a Bitmap.
Drawable d = ImagesArrayList.get(0);
Bitmap bitmap = ((BitmapDrawable)d).getBitmap();
A Drawable can be drawn onto a Canvas, and a Canvas can be backed by a Bitmap:
(Updated to handle a quick conversion for BitmapDrawables and to ensure that the Bitmap created has a valid size)
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;
}
METHOD 1 : Either you can directly convert to bitmap like this
Bitmap myLogo = BitmapFactory.decodeResource(context.getResources(), R.drawable.my_drawable);
METHOD 2 : You can even convert the resource into the drawable and from that you can get bitmap like this
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();
android-ktx has Drawable.toBitmap method: https://android.github.io/android-ktx/core-ktx/androidx.graphics.drawable/android.graphics.drawable.-drawable/to-bitmap.html
From Kotlin
val bitmap = myDrawable.toBitmap()
1) Drawable to Bitmap :
Bitmap mIcon = BitmapFactory.decodeResource(context.getResources(),R.drawable.icon);
// mImageView.setImageBitmap(mIcon);
2) Bitmap to Drawable :
Drawable mDrawable = new BitmapDrawable(getResources(), bitmap);
// mImageView.setDrawable(mDrawable);
very simple
Bitmap tempBMP = BitmapFactory.decodeResource(getResources(),R.drawable.image);
The latest androidx core library (androidx.core:core-ktx:1.2.0) now has an extension function: Drawable.toBitmap(...) to convert a Drawable to a Bitmap.
So after looking (and using) of the other answers, seems they all handling ColorDrawable and PaintDrawable badly. (Especially on lollipop) seemed that Shaders were tweaked so solid blocks of colors were not handled correctly.
I am using the following code now:
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;
}
Unlike the others, if you call setBounds on the Drawable before asking to turn it into a bitmap, it will draw the bitmap at the correct size!
Maybe this will help someone...
From PictureDrawable to 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;
}
... implemented as such:
Bitmap bmp = pictureDrawableToBitmap((PictureDrawable) drawable);
Here is the nice Kotlin version of the answer provided by #Chris.Jenkins here: 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
Here is better resolution
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());
}
Code from How to read drawable bits as InputStream
Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(),
R.drawable.icon);
This will not work every time for example if your drawable is layer list drawable then it gives a null response, so as an alternative you need to draw your drawable into canvas then save as bitmap, please refer below a cup of code.
public void drawableToBitMap(Context context, int drawable, int widthPixels, int heightPixels) {
try {
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/", "drawable.png");
FileOutputStream fOut = new FileOutputStream(file);
Drawable drw = ResourcesCompat.getDrawable(context.getResources(), drawable, null);
if (drw != null) {
convertToBitmap(drw, widthPixels, heightPixels).compress(Bitmap.CompressFormat.PNG, 100, fOut);
}
fOut.flush();
fOut.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private Bitmap convertToBitmap(Drawable drawable, int widthPixels, int heightPixels) {
Bitmap bitmap = Bitmap.createBitmap(widthPixels, heightPixels, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, widthPixels, heightPixels);
drawable.draw(canvas);
return bitmap;
}
above code save you're drawable as drawable.png in the download directory
Android provides a non straight foward solution: BitmapDrawable. To get the Bitmap , we'll have to provide the resource id R.drawable.flower_pic to the a BitmapDrawable and then cast it to a Bitmap.
Bitmap bm = ((BitmapDrawable) getResources().getDrawable(R.drawable.flower_pic)).getBitmap();
BitmapFactory.decodeResource() automatically scales the bitmap, so your bitmap may turn out fuzzy. To prevent scaling, do this:
BitmapFactory.Options options = new BitmapFactory.Options();
options.inScaled = false;
Bitmap source = BitmapFactory.decodeResource(context.getResources(),
R.drawable.resource_name, options);
or
InputStream is = context.getResources().openRawResource(R.drawable.resource_name)
bitmap = BitmapFactory.decodeStream(is);
Use this code.it will help you for achieving your goal.
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;
}
ImageWorker Library can convert bitmap to drawable or base64 and vice versa.
val bitmap: Bitmap? = ImageWorker.convert().drawableToBitmap(sourceDrawable)
Implementation
In Project Level Gradle
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
In Application Level Gradle
dependencies {
implementation 'com.github.1AboveAll:ImageWorker:0.51'
}
You can also store and retrieve bitmaps/drawables/base64 images from external.
Check here. https://github.com/1AboveAll/ImageWorker/edit/master/README.md
if you are using kotlin the use below code. it'll work
// for using image path
val image = Drawable.createFromPath(path)
val bitmap = (image as BitmapDrawable).bitmap
In Kotlin, the easiest way is:
Drawable.toBitmap(width: Int, height: Int, config: Bitmap.Config?): Bitmap
like this:
val bitmapResult = yourDrawable.toBitmap(1,1,null)
where, just need a drawable variable, No resource, No context, No id
// 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);
}
}
}
I've used a few answers on this thread but some of them didn't work as expected (maybe they had worked in older versions) but I wanted to share mine after a few tries and errors, using an extension function:
val markerOption = MarkerOptions().apply {
position(LatLng(driver.lat, driver.lng))
icon(R.drawabel.your_drawable.toBitmapDescriptor(context))
snippet(driver.driverId.toString())
}
mMap.addMarker(markerOption)
This is the extension function:
fun Int.toBitmapDescriptor(context: Context): BitmapDescriptor {
val vectorDrawable = ResourcesCompat.getDrawable(context.resources, this, context.theme)
val bitmap = vectorDrawable?.toBitmap(
vectorDrawable.intrinsicWidth,
vectorDrawable.intrinsicHeight,
Bitmap.Config.ARGB_8888
)
return BitmapDescriptorFactory.fromBitmap(bitmap!!)
}