RenderScript
。public class BlurBuilder {
private static final float BITMAP_SCALE = 0.4f;
private static final float BLUR_RADIUS = 7.5f;
public static Bitmap blur(Context context, Bitmap image) {
int width = Math.round(image.getWidth() * BITMAP_SCALE);
int height = Math.round(image.getHeight() * BITMAP_SCALE);
Bitmap inputBitmap = Bitmap.createScaledBitmap(image, width, height, false);
Bitmap outputBitmap = Bitmap.createBitmap(inputBitmap);
RenderScript rs = RenderScript.create(context);
ScriptIntrinsicBlur theIntrinsic = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
Allocation tmpIn = Allocation.createFromBitmap(rs, inputBitmap);
Allocation tmpOut = Allocation.createFromBitmap(rs, outputBitmap);
theIntrinsic.setRadius(BLUR_RADIUS);
theIntrinsic.setInput(tmpIn);
theIntrinsic.forEach(tmpOut);
tmpOut.copyTo(outputBitmap);
return outputBitmap;
}
}
我用这个方法给我的编辑框背景添加了模糊效果。你可以根据自己的喜好进行修改,尝试调整不透明度:
<?xml version="1.0" encoding="utf-8"?><!-- res/drawable/rounded_edittext.xml -->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:centerColor="#33FFFFFF"
android:endColor="#33FFFFFF"
android:gradientRadius="270"
android:startColor="#33FFFFFF"
android:type="radial" />
<corners
android:bottomLeftRadius="25dp"
android:bottomRightRadius="25dp"
android:topLeftRadius="25dp"
android:topRightRadius="25dp" />
</shape>
还有一种选择是使用一个小的模糊位图并重复它:
<xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="@+id/MainLayout"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="@drawable/backrepeat"
>
接下来需要准备:
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
android:src="@drawable/back"
android:tileMode="repeat" />