Update and implement setting blurring of background image for day mode

Signed-off-by: 1552980358 <1552980358@qq.com>

app/src/main/java/io/legado/app/base/BaseActivity.kt

@@ -2,6 +2,8 @@ package io.legado.app.base
 
 import android.content.Context
 import android.content.res.Configuration
+import android.graphics.Bitmap
+import android.graphics.drawable.BitmapDrawable
 import android.os.Build
 import android.os.Bundle
 import android.util.AttributeSet
@@ -10,11 +12,14 @@ import android.view.MenuItem
 import android.view.View
 import android.widget.FrameLayout
 import androidx.appcompat.app.AppCompatActivity
+import androidx.preference.PreferenceManager
 import androidx.viewbinding.ViewBinding
+import com.google.android.renderscript.Toolkit
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.constant.AppConst
 import io.legado.app.constant.PreferKey
+import io.legado.app.constant.PreferKey.bgImageBlurring
 import io.legado.app.constant.Theme
 import io.legado.app.help.AppConfig
 import io.legado.app.help.ThemeConfig
@@ -174,9 +179,7 @@ abstract class BaseActivity<VB : ViewBinding>(
         }
         if (imageBg) {
             try {
-                ThemeConfig.getBgImage(this)?.let {
-                    window.decorView.background = it
-                }
+                window.decorView.background = BitmapDrawable(resources, getBackgroundImage(ThemeConfig.getBgImage(this) ?: return))
             } catch (e: OutOfMemoryError) {
                 toastOnUi(e.localizedMessage)
             } catch (e: Exception) {
@@ -185,6 +188,15 @@ abstract class BaseActivity<VB : ViewBinding>(
         }
     }
 
+    private fun getBackgroundImage(bitmap: Bitmap): Bitmap {
+        PreferenceManager.getDefaultSharedPreferences(this).getInt(bgImageBlurring, 0).apply {
+            if (this != 0) {
+                return Toolkit.blur(bitmap, this)
+            }
+        }
+        return bitmap
+    }
+
     private fun setupSystemBar() {
         if (fullScreen && !isInMultiWindow) {
             ATH.fullScreen(this)

app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt

@@ -183,6 +183,9 @@ class ThemeConfigFragment : BasePreferenceFragment(),
                     }
                 }
             }
+            PreferKey.bgImageBlurring -> {
+                ImageBlurringDialogFragment(PreferKey.bgImageBlurring) { upTheme(false) }.show(parentFragmentManager)
+            }
             PreferKey.defaultCover -> if (getPrefString(PreferKey.defaultCover).isNullOrEmpty()) {
                 selectImage.launch(requestCodeCover)
             } else {

app/src/main/res/values-zh/strings.xml

@@ -807,6 +807,9 @@
     <string name="pre_download_s">预先下载%s章正文</string>
     <string name="is_enabled">是否启用</string>
     <string name="background_image">背景图片</string>
+    <string name="background_image_blurring">背景图片虚化</string>
+    <string name="background_image_blurring_radius">虚化半径</string>
+    <string name="background_image_hint">0为停用，启用范围1~25\n半径数值越大，虚化效果越高</string>
     <string name="export_folder">导出文件夹</string>
     <string name="export_charset">导出编码</string>
     <string name="export_to_web_dav">导出到WebDav</string>

app/src/main/res/values/strings.xml

@@ -807,6 +807,9 @@
     <string name="pre_download_s">Download %s chapters in advance</string>
     <string name="is_enabled">Is enabled</string>
     <string name="background_image">Background image</string>
+    <string name="background_image_blurring">Background image blurring</string>
+    <string name="background_image_blurring_radius">Blurring radius</string>
+    <string name="background_image_hint">Disabled when 0, enable range from 1 to 25\nThe greater the radius, the stronger the effect of blurring</string>
     <string name="copy_book_url">Copy book URL</string>
     <string name="copy_toc_url">Copy chapters URL</string>
     <string name="export_folder">Export folder</string>

app/src/main/res/xml/pref_config_theme.xml

@@ -86,6 +86,10 @@
             android:key="backgroundImage"
             android:title="@string/background_image" />
 
+        <io.legado.app.ui.widget.prefs.Preference
+            android:key="backgroundImageBlurring"
+            android:title="@string/background_image_blurring" />
+
         <io.legado.app.ui.widget.prefs.ColorPreference
             android:defaultValue="@color/md_grey_200"
             android:key="colorBottomBackground"