android – 对话框后面的模糊背景

概述我希望在它下面有模糊屏幕的对话框,所以我拍摄活动的“截图”,模糊它并将对话框窗口的背景设置为BitmapDrawable.奇怪的是,对话框不再以屏幕为中心,即使调用了setCanceledOnTouchOutside(true),外部对话框也不会忽略它. 问题是：为什么这不起作用？分别如何创建模糊背景的对话框？ public class BlurDialog extends DialogFragm 我希望在它下面有模糊屏幕的对话框,所以我拍摄活动的“截图”,模糊它并将对话框窗口的背景设置为BitmapDrawable.奇怪的是,对话框不再以屏幕为中心,即使调用了setCanceledOntouchOutsIDe(true),外部对话框也不会忽略它.

问题是：为什么这不起作用？分别如何创建模糊背景的对话框？

public class BlurDialog extends DialogFragment {public BlurDialog() {}public static BlurDialog newInstance() {    return new BlurDialog();}@OverrIDepublic Dialog onCreateDialog(Bundle savedInstanceState) {    final AlertDialog alertDialog = new AlertDialog.Builder(getActivity())            .setTitle("Title")            .setMessage("Message")            .setPositivebutton("OK",null)            .setNegativebutton("Cancel",null)            .create();    alertDialog.setCanceledOntouchOutsIDe(true);    VIEw vIEw = getActivity().getwindow().getDecorVIEw();    vIEw.setDrawingCacheEnabled(true);    Bitmap b1 = vIEw.getDrawingCache();    Rect frame = new Rect();    getActivity().getwindow().getDecorVIEw().getwindowVisibledisplayFrame(frame);    int statusbarHeight = frame.top;    final int wIDth = getActivity().getwindow().getDecorVIEw().getWIDth();    final int height = getActivity().getwindow().getDecorVIEw().getHeight();    Bitmap b = Bitmap.createBitmap(b1,statusbarHeight,wIDth,height-statusbarHeight);    //define this only once if blurring multiple times    RenderScript rs = RenderScript.create(getActivity());    //this will blur the bitmapOriginal with a radius of 8 and save it in bitmapOriginal    final Allocation input = Allocation.createFromBitmap(rs,b); //use this constructor for best performance,because it uses USAGE_SHARED mode which reuses memory    final Allocation output = Allocation.createTyped(rs,input.getType());    final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs,Element.U8_4(rs));    script.seTradius(8f);    script.setinput(input);    script.forEach(output);    output.copyTo(b);    alertDialog.getwindow().setBackgroundDrawable(new BitmapDrawable(getResources(),b));    return alertDialog;}}

解决方法 这篇文章很旧,但是供您参考：

要创建具有模糊背景的对话框,您可以使用此库：

https://github.com/tvbarthel/BlurDialogFragment

您可以创建一个扩展BlurDialogFragment的类,并且在onCreateVIEw方法中可以扩展自定义布局.请参阅以下示例：

public class CustomDialogFragment extends BlurDialogFragment {@OverrIDeprotected boolean isActionbarBlurred() {// Enable or disable the blur effect on the action bar.// Disabled by default.return true;} @OverrIDe protected int getBlurRadius() {// Allow to customize the blur radius factor.return 7;}@OverrIDeprotected boolean isDimmingEnable() {// Enable or disable the dimming effect.// Disabled by default.return false;}@OverrIDepublic VIEw onCreateVIEw(LayoutInflater inflater,final VIEwGroup container,Bundle savedInstanceState) {VIEw v = inflater.inflate(R.layout.dialog_fragment_layout,container,false);return v;}

要显示您的Activity中的对话框：

FragmentManager fragmentManager = getFragmentManager();CustomDialogFragment cdf = new CustomDialogFragment();cdf.show(fragmentManager,"yourTag");

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