AlertDialogの背景をぼかし
API 14からわかるように、Below Belowrは非推奨になりました
dialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND);
私が試したダイアログの背後にスクリーンぼかしを作成するためのこれに代わるものはありますか FAST blur
これがダイアログの背景をぼかす方法です
手順
1）以下のコードを使用して背景のスナップショットを撮ります
_private 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;
int width = activity.getWindowManager().getDefaultDisplay().getWidth();
int height = activity.getWindowManager().getDefaultDisplay().getHeight();
Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height - statusBarHeight);
view.destroyDrawingCache();
return b;
}
_次のように使用しますBitmap map=takeScreenShot(BlurImageView.this); //あなたの活動名
2）メソッドを呼び出すBitmap fast=fastblur(map, 10); Got it From Here
_ 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);
}
_3）最後にButtonクリック
_btnblur.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
AlertDialog.Builder builder=new AlertDialog.Builder(BlurImageView.this,R.style.Theme_D1NoTitleDim);
builder.setTitle("Content");
builder.setMessage("CLICK OK to Exit");
builder.setPositiveButton("ON", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
back_dim_layout.setVisibility(View.GONE);
dialog.cancel();
}
});
alert=builder.create();
Bitmap map=takeScreenShot(BlurImageView.this);
Bitmap fast=fastblur(map, 10);
final Drawable draw=new BitmapDrawable(getResources(),fast);
alert.getWindow().setBackgroundDrawable(draw);
alert.show();
}
});
_以上で、Blur Image Behind Youアクティビティを確認できます
これがAnyOneに役立つことを願っています...
この方法を試してみてください
styles.xmlを作成します
<style name="Theme.D1NoTitleDim" parent="Android:style/Theme.Translucent">
<item name="Android:windowNoTitle">true</item>
<item name="Android:windowContentOverlay">@null</item>
<item name="Android:backgroundDimEnabled">true</item>
<item name="Android:background">@Android:color/transparent</item>
</style>
そして、あなたのダイアログで
dialog = new Dialog(context,styles);
これは私のためにうまく機能しています
詳細については、これを参照することをお勧めします Example
速いブラーと画面の上部に表示されるダイアログの問題を解決するには、もっと簡単な解決策があると思います：
// Custom Dialog to be called in the Activity choosed.
public class CustomDialog {
private Dialog dialog;
public CustomDialog(AppCompatActivity activity) {
dialog = new Dialog(activity);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
View viewCustomDialog = LayoutInflater.from(activity).inflate(R.layout.custom_dialog, null);
dialog.setContentView(viewCustomDialog);
RelativeLayout rootView = viewCustomDialog.findViewById(R.id.rootView);
WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams();
layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
layoutParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
layoutParams.gravity = Gravity.CENTER;
dialog.getWindow().setAttributes(layoutParams);
// First get bitmap with blur filter applied, using the function blur presented here,
// or another function.
// Activity parameter is the Activity for which you call dialog.show();
Bitmap bitmap = Utils.blur(activity);
// Get bitmap height.
int bitmapHeight = bitmap.getHeight();
dialog.setOnShowListener(dialogInterface -> {
// When dialog is shown, before set new blurred image for background drawable,
// the root view height and dialog margin are saved.
int rootViewHeight = rootView.getHeight();
int marginLeftAndRight = dialog.getWindow().getDecorView().getPaddingLeft();
// Set new blurred image for background drawable.
dialog.getWindow().setBackgroundDrawable(new BitmapDrawable(builder.context.getResources(), bitmap));
// After get positions and heights, recover and rebuild original marginTop position,
// that is (bitmapHeight - rootViewHeight) / 2.
// Also recover and rebuild Dialog original left and right margin.
FrameLayout.LayoutParams rootViewLayoutParams = (FrameLayout.LayoutParams)rootView.getLayoutParams();
rootViewLayoutParams.setMargins(marginLeftAndRight, (bitmapHeight - rootViewHeight) / 2, marginLeftRight, 0);
});
dialog.show();
}
}
ぼかし方法：
public static Bitmap blur(AppCompatActivity activity) {
Bitmap bitmap = Utils.takeScreenShot(activity);
RenderScript renderScript = RenderScript.create(activity);
// This will blur the bitmapOriginal with a radius of 16 and save it in bitmapOriginal
final Allocation input = Allocation.createFromBitmap(renderScript, bitmap); // Use this constructor for best performance, because it uses USAGE_SHARED mode which reuses memory
final Allocation output = Allocation.createTyped(renderScript, input.getType());
final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(renderScript, Element.U8_4(renderScript));
script.setRadius(16f);
script.setInput(input);
script.forEach(output);
output.copyTo(bitmap);
return bitmap;
}
TakeScreenShotメソッド：
public static Bitmap takeScreenShot(AppCompatActivity activity) {
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bitmap = view.getDrawingCache();
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
int[] widthHeight = getScreenSize(activity);
Bitmap bitmapResult = Bitmap.createBitmap(bitmap, 0, statusBarHeight, widthHeight[0], widthHeight[1] - statusBarHeight);
view.destroyDrawingCache();
return bitmapResult;
}
GetScreenSizeメソッド：
public static int[] getScreenSize(Context context) {
int[] widthHeight = new int[2];
widthHeight[WIDTH_INDEX] = 0;
widthHeight[HEIGHT_INDEX] = 0;
WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = windowManager.getDefaultDisplay();
Point size = new Point();
display.getSize(size);
widthHeight[WIDTH_INDEX] = size.x;
widthHeight[HEIGHT_INDEX] = size.y;
if (!isScreenSizeRetrieved(widthHeight)) {
DisplayMetrics metrics = new DisplayMetrics();
display.getMetrics(metrics);
widthHeight[0] = metrics.widthPixels;
widthHeight[1] = metrics.heightPixels;
}
if (!isScreenSizeRetrieved(widthHeight)) {
widthHeight[0] = display.getWidth(); // deprecated
widthHeight[1] = display.getHeight(); // deprecated
}
return widthHeight;
}
private static boolean isScreenSizeRetrieved(int[] widthHeight) {
return widthHeight[WIDTH_INDEX] != 0 && widthHeight[HEIGHT_INDEX] != 0;
}
また、RenderScript（ぼかし）を使用するには、アプリのbuild.gradleに次を追加する必要があります。
defaultConfig {
...
renderscriptTargetApi 19
renderscriptSupportModeEnabled true
}