It's just a realtime blurring overlay like iOS UIVisualEffectView.
Just put the view in the layout xml, no Java code is required.
// Views to be blurred
<ImageView ../>
<com.github.mmin18.widget.RealtimeBlurView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:realtimeBlurRadius="20dp"
app:realtimeOverlayColor="#8000" />
// Views above blurring overlay
<Button ../>
Try the sample apk: blurring.apk
Add dependencies in your build.gradle:
dependencies {
compile 'com.github.mmin18:realtimeblurview:1.0.4'
}
android {
buildToolsVersion '23.0.3' // Use 23.0.3 or higher
defaultConfig {
minSdkVersion 15
renderscriptTargetApi 19
renderscriptSupportModeEnabled true // Enable RS support
}
}RealtimeBlurView use RenderScript to blur the bitmap, just like 500px-android-blur.
Everytime your window draw, it will render a blurred bitmap, so there is a performance cost. Set downsampleFactor>=4 will significantly reduce the render cost. However, if you just want to blur a static view, 500px-android-blur is good enough.
I've run the sample on some old phones like Samsung Galaxy S2, Samsung Galaxy S3, it runs at full FPS. Here is a performance chart while scrolling the list on Nexus 5.
Support custom shape (by override drawBlurredBitmap()), support view in ContextThemeWrapper.