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
Related
I need to change the default cross-icon in ChromeCustomTab Android, I am changing it with back-icon using the code below:
Bitmap icon = BitmapFactory.decodeResource(context.getResources(),R.drawable.ic_arrow_back_white_24dp);
It is working fine with PNGs but not with SVGs.
As per this documentation, we have to maintain size of image according to this documentation.
https://developer.android.com/reference/android/support/customtabs/CustomTabsIntent.html#KEY_ICON
I think it is not working because they are not following the dimensions given in Documentation.
You need to return a valid Bitmap. For a VectorDrawable it is necessary to do something more. You can use these methods:
private static Bitmap bitmapFromDrawable(Context context, int drawableId) {
Drawable drawable = ContextCompat.getDrawable(context, drawableId);
if (drawable instanceof VectorDrawable) {
return bitmapFromVectorDrawable((VectorDrawable) drawable);
}
return ((BitmapDrawable) drawable).getBitmap();
}
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
private static Bitmap bitmapFromVectorDrawable(VectorDrawable vectorDrawable) {
Bitmap bitmap = Bitmap.createBitmap(vectorDrawable.getIntrinsicWidth(), vectorDrawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
vectorDrawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
vectorDrawable.draw(canvas);
return bitmap;
}
Then you can use it like:
builder.setCloseButtonIcon(bitmapFromDrawable(this, R.drawable. ic_arrow_back_white_24dp));
This question already has answers here:
How to convert a Drawable to a Bitmap?
(22 answers)
Closed 6 years ago.
I want to convert a Icon to Bitmap object in android.
My goal is to convert from Notification Icon to bitmap.
What should i do??
Thank you for all the answers!
Hope this helps
Bitmap bitmapIcon = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
You can use this class. Also I usually use this code.
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;
}
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 have a png image inside my Drawable folder. The same image I use it in many markers but in different sizes. Instead of creating many images with different sizes, I wanted to create XMLs inside the Drawable folder reusing the orignial image.
I tried solutions on this answers: Scale a drawable resource in XML (Android) but they are not working in my cases. When I reach
BitmapDescriptor scaledIcon = BitmapDescriptorFactory.fromResource(R.drawable.scaled_marker_image); //scaled_marker_image is the XML that resize the original image
mMap.addMarker(new MarkerOptions().position(new LatLng(location.getLatitude(), location.getLongitude())).title("Marker").icon(scaledIcon));
Basically in the MarjerOptions().icon(scaledIcon) I get nullPointerException
Any ideas how to achieve this?
XML would look like this (as shown in Scale a drawable resource in XML (Android) answer)
<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="#drawable/marker_image"
android:insetTop="30dp"
android:insetLeft="10dp"
android:insetRight="10dp"
android:insetBottom="0dp"
/>
We define a method to transform a Drawable to Bitmap
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;
}
And then, to set the drawable to the marker:
Drawable drawable = getResources().getDrawable(getResources().getDrawable(R.drawable.mi_posicion_marker2));
BitmapDescriptor scaledIcon = BitmapDescriptorFactory.fromBitmap(drawableToBitmap(drawable));
mMap.addMarker(new MarkerOptions().position(new LatLng(location.getLatitude(), location.getLongitude())).title("Marker").icon(scaledIcon));
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;
}