要在Android应用中使用高斯模糊效果来设置背景,可以使用以下方法:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bg_blur">
<!-- Your other layout views here -->
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
android:src="@drawable/your_background_image"
android:gravity="center"
android:alpha="0.6"/>
public class BlurUtils {
public static Bitmap blurBitmap(Context context, Bitmap bitmap, float radius) {
RenderScript rs = RenderScript.create(context);
Allocation input = Allocation.createFromBitmap(rs, bitmap, Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_SCRIPT);
Allocation output = Allocation.createTyped(rs, input.getType());
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
script.setRadius(radius);
script.setInput(input);
script.forEach(output);
output.copyTo(bitmap);
rs.destroy();
return bitmap;
}
}
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.your_background_image);
Bitmap blurredBitmap = BlurUtils.blurBitmap(this, bitmap, 25f);
Drawable drawable = new BitmapDrawable(getResources(), blurredBitmap);
yourRelativeLayout.setBackground(drawable);
通过上述步骤,就可以在Android应用中设置高斯模糊的背景效果了。