AppCompat 23.2 use VectorDrawableCompat with RemoteViews (AppWidget) on API<21
Solution 1
UPDATE 22/10/2017
As noted by @user924 now AppCompatDrawableManager access is restricted to its own library. ContextCompat.getDrawable(...) should do the trick.
UPDATE 05/09/2016
As noted by @kirill-kulakov in its answer, the latest updates of the Support Library restricted the TintContextWrapper visibility to its own package.
I'm updating my answer to remove the incorrect code, but please thank Kirill for the correction!
VectorDrawable and RemoteViews pre-Lollipop
You can avoid adding alternative rasterized versions of your vector drawable resources with an easy hack: use AppCompat TintResources through TintContextWrapper using AppCompatDrawableManager using ContextCompat.
TintResources AppCompatDrawableManager ContextCompat is the class that among other things, on pre-Lollipop devices, parses the VectorDrawables XML files and convert them into VectorDrawableCompat instances that can be used all the way down to API 7.
Then, once you have a VectorDrawableCompat instance, rasterize it onto a Bitmap. You'll later use this bitmap in a remote ImageView.
Before we begin: AppCompat Library
Ensure you are using Android Studio 2.0+ and have configured your app build.gradle
file as follows:
android {
defaultConfig {
vectorDrawables.useSupportLibrary = true
}
}
dependencies {
compile 'com.android.support:appcompat-v7:23.3.0'
}
Update your AppWidgetProvider
First of all: don't set your vector drawable resources inside your RemoteViews layout file (neither android:src
nor app:srcCompat
will work). You'll have to set them programmatically.
Inside your AppWidgetProvider class set the vector resource or a rasterized version depending on the API level:
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.appwidget_layout);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
remoteViews.setImageViewResource(R.id.imageView, R.drawable.vector);
} else {
Drawable d = ContextCompat.getDrawable(context, R.drawable.vector);
Bitmap b = Bitmap.createBitmap(d.getIntrinsicWidth(),
d.getIntrinsicHeight(),
Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
d.setBounds(0, 0, c.getWidth(), c.getHeight());
d.draw(c);
remoteViews.setImageViewBitmap(R.id.imageView, b);
}
References
- ContextCompat source code
- Chris Banes' AppCompat v23.2 - Age of the vectors blog post introduces VectorDrawableCompat and explains the hack that AppCompat uses to make them work on pre-Lollipop devices.
Solution 2
The following method will convert the vector drawable
to a bitmap before, this should do the trick.
public static BitmapDrawable vectorToBitmapDrawable(Context ctx, @DrawableRes int resVector) {
return new BitmapDrawable(ctx.getResources(), vectorToBitmap(ctx, resVector));
}
public static Bitmap vectorToBitmap(Context ctx, @DrawableRes int resVector) {
Drawable drawable = AppCompatDrawableManager.get().getDrawable(ctx, resVector);
Bitmap b = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
drawable.setBounds(0, 0, c.getWidth(), c.getHeight());
drawable.draw(c);
return b;
}
araks
Co-Founder, Director and Developer at Code Atlas SRL, Milan, IT.
Updated on October 23, 2020Comments
-
araks over 3 years
I have an AppWidget and I'd like to use VectorDrawables in it also on pre-Lollipop devices. VectorDrawableCompat won't work with the RemoteViews I create.
To keep my app APK size down, I don't want to add alternative PNG versions of my drawables for older API platforms.
How can I do that?
-
Kirill Kulakov almost 8 yearsTintContextWrapper is not public in android.support.v7.widget; cannot be accessed from outside package
-
user25 almost 7 yearserror on
Bitmap.createBitmap(d.getIntrinsicWidth(), d.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
stackoverflow.com/questions/43710994/… -
user924 over 6 years
AppCompatDrawableManager can only be called from within the same library group
-
araks over 6 yearsHi @user924, I updated the answer to add compatibility to the latest Android Support Library versions! Thank you!
-
Eugen Pechanec over 6 years
As noted by @user924 now AppCompatDrawableManager access is restricted to its own library.
a) That doesn't prevent you from actually using it. b) There's now public API inAppCompatResources.getDrawable(...)
. -
user924 over 6 yearsalso
setImageViewResource
mb will work for < 21 if addAppCompatImageView
(instead of ImageView) to layout -
Daniel about 6 years@user924,RemoteViews surely doesn't work with AppCompatImageView. The list of widgets and layout you can use in RemoteViews is defined in it's documentation