位置中心模糊背景的AlertDialog [英] AlertDialog with Blur background in position center
问题描述
问题
试图模糊(而不是DIM)Dialog的背景.
Tried to blur (not DIM) the background of a Dialog.
和FLAG_BLUR_BEHIND已被淘汰.
方法是，从醋栗视图中截取屏幕截图并对其进行模糊处理.然后附加到背景，当出现AlertDialog时，它将起作用.
Approach is, take a screenshot form the currant view and blur it.Then attach to the background,When AlertDialog appears, and it works.
但是AlertDialog总是位于中心的顶部不是.(检查图像)
but AlertDialog is always in the Top not in the center.(check the image)
WindowManager.LayoutParams附加 后无效.(将其附加到背景之前，可以将 位置居中，但是将模糊视图附加到背景AlertDialog始终转到顶部)
WindowManager.LayoutParams has no effect after attach .(before attach it to the background,alert can position to center, but after attaching the blur view to the background AlertDialog always go to the top )
如何在屏幕上显示警报中心?
How can I make my alert center in the screen?
以下是我尝试过的代码，我们将不胜感激任何指南，
below is code i tried,any guide will be appreciated ,
按下后显示警报.
@Override
public void onBackPressed() {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this, R.style.AlertDialogCustom);
builder.setTitle("Lets Blur");
builder.setMessage("This is Blur Demo");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
dialog = builder.create();
// this position alert in the CENTER
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
WindowManager.LayoutParams wmlp = dialog.getWindow().getAttributes();
wmlp.gravity = Gravity.CENTER;
dialog.show();
new BlurAsyncTask().execute();
}
class BlurAsyncTask extends AsyncTask<Void, Integer, Bitmap> {
protected Bitmap doInBackground(Void...arg0) {
Bitmap map = AppUtils.takeScreenShot(MainActivity.this);
Bitmap fast = new BlurView().fastBlur(map, 10);
return fast;
}
protected void onPostExecute(Bitmap result) {
if (result != null){
final Drawable draw=new BitmapDrawable(getResources(),result);
Window window = dialog.getWindow();
// this position alert again in the TOP -- need to avoid that!
window.setBackgroundDrawable(draw);
window.setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT);
window.setGravity(Gravity.CENTER);
dialog.show();
}
}
其他课程
AppUtils
public class AppUtils {
public static Bitmap takeScreenShot(Activity activity) {
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap b1 = view.getDrawingCache();
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
Display display = activity.getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height - statusBarHeight);
view.destroyDrawingCache();
return b;
}
}
BlurView
public class BlurView {
public Bitmap fastBlur(Bitmap sentBitmap, int radius) {
Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
if (radius < 1) {
return (null);
}
int w = bitmap.getWidth();
int h = bitmap.getHeight();
int[] pix = new int[w * h];
Log.e("pix", w + " " + h + " " + pix.length);
bitmap.getPixels(pix, 0, w, 0, 0, w, h);
int wm = w - 1;
int hm = h - 1;
int wh = w * h;
int div = radius + radius + 1;
int r[] = new int[wh];
int g[] = new int[wh];
int b[] = new int[wh];
int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
int vmin[] = new int[Math.max(w, h)];
int divsum = (div + 1) >> 1;
divsum *= divsum;
int dv[] = new int[256 * divsum];
for (i = 0; i < 256 * divsum; i++) {
dv[i] = (i / divsum);
}
yw = yi = 0;
int[][] stack = new int[div][3];
int stackpointer;
int stackstart;
int[] sir;
int rbs;
int r1 = radius + 1;
int routsum, goutsum, boutsum;
int rinsum, ginsum, binsum;
for (y = 0; y < h; y++) {
rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
for (i = -radius; i <= radius; i++) {
p = pix[yi + Math.min(wm, Math.max(i, 0))];
sir = stack[i + radius];
sir[0] = (p & 0xff0000) >> 16;
sir[1] = (p & 0x00ff00) >> 8;
sir[2] = (p & 0x0000ff);
rbs = r1 - Math.abs(i);
rsum += sir[0] * rbs;
gsum += sir[1] * rbs;
bsum += sir[2] * rbs;
if (i > 0) {
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
} else {
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
}
}
stackpointer = radius;
for (x = 0; x < w; x++) {
r[yi] = dv[rsum];
g[yi] = dv[gsum];
b[yi] = dv[bsum];
rsum -= routsum;
gsum -= goutsum;
bsum -= boutsum;
stackstart = stackpointer - radius + div;
sir = stack[stackstart % div];
routsum -= sir[0];
goutsum -= sir[1];
boutsum -= sir[2];
if (y == 0) {
vmin[x] = Math.min(x + radius + 1, wm);
}
p = pix[yw + vmin[x]];
sir[0] = (p & 0xff0000) >> 16;
sir[1] = (p & 0x00ff00) >> 8;
sir[2] = (p & 0x0000ff);
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
rsum += rinsum;
gsum += ginsum;
bsum += binsum;
stackpointer = (stackpointer + 1) % div;
sir = stack[(stackpointer) % div];
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
rinsum -= sir[0];
ginsum -= sir[1];
binsum -= sir[2];
yi++;
}
yw += w;
}
for (x = 0; x < w; x++) {
rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
yp = -radius * w;
for (i = -radius; i <= radius; i++) {
yi = Math.max(0, yp) + x;
sir = stack[i + radius];
sir[0] = r[yi];
sir[1] = g[yi];
sir[2] = b[yi];
rbs = r1 - Math.abs(i);
rsum += r[yi] * rbs;
gsum += g[yi] * rbs;
bsum += b[yi] * rbs;
if (i > 0) {
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
} else {
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
}
if (i < hm) {
yp += w;
}
}
yi = x;
stackpointer = radius;
for (y = 0; y < h; y++) {
// Preserve alpha channel: ( 0xff000000 & pix[yi] )
pix[yi] = ( 0xff000000 & pix[yi] ) | ( dv[rsum] << 16 ) | ( dv[gsum] << 8 ) | dv[bsum];
rsum -= routsum;
gsum -= goutsum;
bsum -= boutsum;
stackstart = stackpointer - radius + div;
sir = stack[stackstart % div];
routsum -= sir[0];
goutsum -= sir[1];
boutsum -= sir[2];
if (x == 0) {
vmin[y] = Math.min(y + r1, hm) * w;
}
p = x + vmin[y];
sir[0] = r[p];
sir[1] = g[p];
sir[2] = b[p];
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
rsum += rinsum;
gsum += ginsum;
bsum += binsum;
stackpointer = (stackpointer + 1) % div;
sir = stack[stackpointer];
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
rinsum -= sir[0];
ginsum -= sir[1];
binsum -= sir[2];
yi += w;
}
}
Log.e("pix", w + " " + h + " " + pix.length);
bitmap.setPixels(pix, 0, w, 0, 0, w, h);
return (bitmap);
}
}
屏幕截图-这是我得到的结果-我想设置警报中心，但它始终保持在最前
screen shot - this is the result i get- i want to make alert center but it stays on top
答案的概念
- 进行屏幕截图
- 以编程方式对该屏幕截图进行动画处理/模糊/任何效果
- 使用对话框女巫获取醋栗窗口没有任何内容
- 附加具有效果的屏幕截图
- 显示我想显示的真实视图
侧面说明::该参数可用于附加任何类型的背景！只需添加正确的方法即可接受位图，并返回您要在BlurView类中进行更改的位图.我加了一个模糊.
Side Note: This can be used to attach any type of a background! blur.. dim..bright.. Just add the right method that accept a bitmap and return a bitmap with changes you want in BlurView class. I added a blur one.
推荐答案
注意:此屏幕背景可以是您所拥有的任何内容，它的作用是对其进行屏幕截图并最终模糊处理将其设置为具有模糊效果的alertDialog的背景
Note: This screen background can be anything you have on it, what it does is take a screenshot of it and blur that finally set it as the background of the alertDialog with blur effect
问题被附在alertDialog上，并且模糊背景始终位于顶部，我无法更改它.
Problem was alertDialog attached with that blur background was always on the top and i couldn't change that.
我想出了这个解决方案.
I came up with this solution.
我不得不使用两个alertDialogs
一个是用于模糊效果(用于getWindow())，现在不显示(我删除了它的setContentView/可以使用透明背景)
I had to use two alertDialogs
one is for the blur effect(for the use of getWindow()) and it does not get display now(I removed its setContentView / can use transparent background)
另一个是在模糊效果后显示的真实警报对话框.
The other one is the real alert dialog got display after the blur effect.
MainActivity
public class MainActivity extends AppCompatActivity {
private AlertDialog dialogWhichDisplayAlert;
private Dialog fakeDialogUseToGetWindowForBlurEffect;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public void onBackPressed() {
fakeDialogUseToGetWindowForBlurEffect = new Dialog(MainActivity.this);
// fakeDialogUseToGetWindowForBlurEffect.setContentView(R.layout.fakealert); // removed the content so not visible
new BlurAsyncTask().execute();
}
class BlurAsyncTask extends AsyncTask<Void, Integer, Bitmap> {
protected Bitmap doInBackground(Void...arg0) {
Bitmap map = AppUtils.takeScreenShot(MainActivity.this);
Bitmap fast = new BlurView().fastBlur(map, 10);
return fast;
}
protected void onPostExecute(Bitmap result) {
if (result != null){
final Drawable draw=new BitmapDrawable(getResources(),result);
Window window = fakeDialogUseToGetWindowForBlurEffect.getWindow();
window.setBackgroundDrawable(draw);
window.setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT);
window.setGravity(Gravity.CENTER);
fakeDialogUseToGetWindowForBlurEffect.show();
// real one
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this, R.style.AlertDialogCustom);
builder.setTitle("Lets Blur");
builder.setMessage("This is Blur Demo");
builder.setCancelable(false);
builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
fakeDialogUseToGetWindowForBlurEffect.dismiss();
dialog.cancel();
}
});
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
fakeDialogUseToGetWindowForBlurEffect.dismiss();
dialog.cancel();
}
});
dialogWhichDisplayAlert = builder.create();
// position real dialogWhichDisplayAlert using Gravity.CENTER;
dialogWhichDisplayAlert.requestWindowFeature(Window.FEATURE_NO_TITLE);
WindowManager.LayoutParams wmlp = dialogWhichDisplayAlert.getWindow().getAttributes();
wmlp.gravity = Gravity.CENTER;
dialogWhichDisplayAlert.show();
}
}
}
}
[使用的其他类与问题相同]
[other classes used are same as the question]
样式
<style name="AlertDialogCustom" parent="@android:style/Theme.Dialog">
<item name="android:textColor">#00FF00</item>
<item name="android:typeface">monospace</item>
<item name="android:textSize">10sp</item>
</style>
输出
这篇关于位置中心模糊背景的AlertDialog的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
