第一个为大家介绍图片如何转高斯模拟：
1.方法的实现:
代码语言：javascript复制public static void updateBgToBlur(Activity a, Bitmap bmpToBlur, View view, int resId) {
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inJustDecodeBounds = true;
opt.inSampleSize = 8;
opt.inJustDecodeBounds = false;
Bitmap bmp = BitmapFactory.decodeResource(a.getResources(), resId, opt);
if (Build.VERSION.SDK_INT Build.VERSION_CODES.JELLY_BEAN) {
view.setBackground(null);
} else {
view.setBackgroundDrawable(null);
}
if (bmpToBlur != null && !bmpToBlur.isRecycled()) {
bmpToBlur.recycle();
}
bmpToBlur = blurBitmap(a, bmp);
if (Build.VERSION.SDK_INT = Build.VERSION_CODES.JELLY_BEAN) {
view.setBackground(new BitmapDrawable(a.getResources(), bmpToBlur));
} else {
view.setBackgroundDrawable(new BitmapDrawable(a.getResources(), bmpToBlur));
}
}
public static Bitmap blurBitmap(Context c, Bitmap bitmap) {
//Let's create an empty bitmap with the same size of the bitmap we want to blur
Bitmap outBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_4444);
//Instantiate a new Renderscript
RenderScript rs = RenderScript.create(c.getApplicationContext());
//Create an Intrinsic Blur Script using the Renderscript
ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
//Create the Allocations (in/out) with the Renderscript and the in/out bitmaps
Allocation allIn = Allocation.createFromBitmap(rs, bitmap);
Allocation allOut = Allocation.createFromBitmap(rs, outBitmap);
//Set the radius of the blur
blurScript.setRadius(25.f);
//Perform the Renderscript
blurScript.setInput(allIn);
blurScript.forEach(allOut);
//Copy the final bitmap created by the out Allocation to the outBitmap
allOut.copyTo(outBitmap);
//recycle the original bitmap
bitmap.recycle();
//After finishing everything, we destroy the Renderscript.
rs.destroy();
return outBitmap;
}2 调用:
代码语言：javascript复制 Bitmap bitmap=null;
if (Build.VERSION.SDK_INT Build.VERSION_CODES.KITKAT) {
ImageUtil.updateBgToBlur(getActivity(), bitmap, slidingUpPanelLayout, R.drawable.bg_tageditor);
} else {
slidingUpPanelLayout.setBackgroundResource(R.drawable.bg_tageditor);
}二、高斯模糊布局:
项目需求: 现有一个紫色背景图片, 相册图片覆盖在背景图片 , 一个Framlayout 覆盖在这个含有相册图片的背景图中 ,实现模糊盖在上面的高斯模拟效果:
1 引用BlurView:
代码语言：javascript复制 compile 'com.eightbitlab:supportrenderscriptblur:1.0.0'
compile 'com.eightbitlab:blurview:1.3.3'
defaultConfig {
renderscriptTargetApi 25 //must match target sdk and build tools, 23
renderscriptSupportModeEnabled true
}2.调用:
代码语言：javascript复制final float radius = 20;
final View decorView = getActivity().getWindow().getDecorView();
//Activity's root View. Can also be root View of your layout (preferably)
final ViewGroup rootView = (ViewGroup) decorView.findViewById(android.R.id.content);
//set background, if your root layout doesn't have one
final Drawable windowBackground = decorView.getBackground();
if (Build.VERSION.SDK_INT = Build.VERSION_CODES.JELLY_BEAN_MR1) {
mBlurView.setupWith(rootView)
.windowBackground(windowBackground)
.blurAlgorithm(new RenderScriptBlur(getActivity()))
.blurRadius(radius);
}else {
mBlurView.setupWith(rootView)
.windowBackground(windowBackground)
.blurAlgorithm(new SupportRenderScriptBlur(getActivity()))
.blurRadius(radius);
}3 xml
代码语言：javascript复制 <eightbitlab.com.blurview.BlurView
android:id="@ id/blurView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:blurOverlayColor="@color/colorOverlay"
<!--Any child View here, TabLayout for example--
</eightbitlab.com.blurview.BlurView 以上就是本文的全部内容，希望对大家的学习有所帮助。
