RealtimeBlurView
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
Adding to project
Add dependencies in your build.gradle:
dependencies {
implementation 'com.github.mmin18:realtimeblurview:1.2.1'
}
Support API level < 19
The following step is only required if your minSdkVersion < 19, or you use renderscript support mode.
Both AndroidX and Android Support Library is supported.
android {
buildToolsVersion '24.0.2' // Use 23.0.3 or higher
defaultConfig {
minSdkVersion 15
renderscriptTargetApi 19
renderscriptSupportModeEnabled true // Enable RS support
}
}
Add proguard rules if necessary:
-keep class android.support.v8.renderscript.** { *; }
-keep class androidx.renderscript.** { *; }
Limitations
-
Adding multiple RealtimeBlurView (even not visible) may hurt drawing performance, like use it in ListView or RecyclerView.
-
It will not work with SurfaceView / TextureView like VideoView, GoogleMapView
Performance
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.
Changelog
1.2.1 (2019-05-24)
Improve BlurImpl detection.
1.2 (2019-05-22)
Support both AndroidX and Android Support Library.
1.1.2 (2018-05-28)
Bug fix (Draw overlay color in rect).
1.1.1 (2018-05-22)
Fix downsample factor issue when blur radius is very big.
1.1.0 (2017-01-02)
Some improvements (OOM, resize, window background)
1.0.8 (2016-11-29)
Fix view not refreshed issue on PopupWindow
1.0.6 (2016-11-7)
Fix crash when view is very small (draw at least 1px)
1.0.5 (2016-11-5)
Support Popup Window (Use it as dialog background) Ignore UnsatisfiedLinkError if APK is not debuggable.
1.0.4 (2016-9-28)
Support custom shape (by override drawBlurredBitmap()), support view in ContextThemeWrapper.
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