If you have a low-end device, you probably noticed the gray background color on your control center and notification shade. Let's bring back the glorious blur effect by patching MiuiSystemUI.apk.
Prerequisites:
adbapktool < v2.6.0smali/baksmaliCode/Text EditorCustom Recovery InstalledCommon knowledge. I'm not responsible if you bricked your device or caused a thermonuclear war. ;)
Install the tools required for this operation. Use your favorite distro's package manager to install it or clone it from its github repository.
$ adb pull /system/priv-app/MiuiSystemUI/MiuiSystemUI.apk .
The command above will copy the apk file to the current directory. It's recommended to create a backup. We will be overwriting it later.
Decompile the APK with apktool.
$ apktool d -r MiuiSystemUI.apkThe command should decompile the apk file and create a folder named MiuiSystemUI. Go to the extracted folder. It should contain:
+ assets/
+ kotlin/
+ original/
+ res/
+ smali/
+ AndroidManifest.xml
+ apktool.yml
+ resources.arsc
Go inside the smali/ folder.
This is the most important part. ControlPanelWindowManager.smali and StatusBarWindowManager.smali are the files that we need to edit to enable the blur effects on the control center and notification shade, respectively.
- Open
com/android/systemui/miui/statusbar/phone/ControlPanelWindowManager.smaliwith your favorite text editor. - Find the
applyBlurRatio()method. It should be on line 101 to 148 (might be different in your device). Then change the whole function to:
.method private applyBlurRatio(F)V
.registers 5
.line 180
invoke-virtual {p0}, Lcom/android/systemui/miui/statusbar/phone/ControlPanelWindowManager;->hasAdded()Z
move-result v0
if-eqz v0, :cond_2b
.line 181
new-instance v0, Ljava/lang/StringBuilder;
invoke-direct {v0}, Ljava/lang/StringBuilder;-><init>()V
const-string v1, "setBlurRatio: "
invoke-virtual {v0, v1}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;
invoke-virtual {v0, p1}, Ljava/lang/StringBuilder;->append(F)Ljava/lang/StringBuilder;
invoke-virtual {v0}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;
move-result-object v0
const-string v1, "ControlPanelWindowManager"
invoke-static {v1, v0}, Landroid/util/Log;->d(Ljava/lang/String;Ljava/lang/String;)I
.line 182
iget-object v0, p0, Lcom/android/systemui/miui/statusbar/phone/ControlPanelWindowManager;->mLpChanged:Landroid/view/WindowManager$LayoutParams;
iget-object v1, p0, Lcom/android/systemui/miui/statusbar/phone/ControlPanelWindowManager;->mControlPanel:Lcom/android/systemui/miui/statusbar/phone/ControlPanelWindowView;
invoke-virtual {v1}, Landroid/widget/FrameLayout;->getViewRootImpl()Landroid/view/ViewRootImpl;
move-result-object v1
const/4 v2, 0x0
invoke-static {v0, v1, p1, v2}, Landroid/view/SurfaceControlCompat;->setBlur(Landroid/view/WindowManager$LayoutParams;Landroid/view/ViewRootImpl;FI)V
.line 183
invoke-direct {p0}, Lcom/android/systemui/miui/statusbar/phone/ControlPanelWindowManager;->apply()V
:cond_2b
return-void
.end method-
Save it.
-
Open
com/android/systemui/statusbar/phone/StatusBarWindowManager.smaliwith your favorite text editor. -
Find the
applyBlurRatio()method. It should be on line 294 to 341 (again, it might be different in your device). Then change the whole function to:
.method private applyBlurRatio(Lcom/android/systemui/statusbar/phone/StatusBarWindowManager$State;)V
.registers 6
.line 320
iget-object v0, p0, Lcom/android/systemui/statusbar/phone/StatusBarWindowManager;->mLpChanged:Landroid/view/WindowManager$LayoutParams;
iget-object v1, p0, Lcom/android/systemui/statusbar/phone/StatusBarWindowManager;->mStatusBarView:Landroid/view/ViewGroup;
invoke-virtual {v1}, Landroid/view/ViewGroup;->getViewRootImpl()Landroid/view/ViewRootImpl;
move-result-object v1
iget v2, p1, Lcom/android/systemui/statusbar/phone/StatusBarWindowManager$State;->blurRatio:F
const/4 v3, 0x0
invoke-static {v0, v1, v2, v3}, Landroid/view/SurfaceControlCompat;->setBlur(Landroid/view/WindowManager$LayoutParams;Landroid/view/ViewRootImpl;FI)V
.line 323
iget-object p0, p0, Lcom/android/systemui/statusbar/phone/StatusBarWindowManager;->mBlurRatioListeners:Ljava/util/List;
invoke-interface {p0}, Ljava/util/List;->iterator()Ljava/util/Iterator;
move-result-object p0
:goto_14
invoke-interface {p0}, Ljava/util/Iterator;->hasNext()Z
move-result v0
if-eqz v0, :cond_26
invoke-interface {p0}, Ljava/util/Iterator;->next()Ljava/lang/Object;
move-result-object v0
check-cast v0, Lcom/android/systemui/statusbar/phone/StatusBarWindowManager$BlurRatioChangedListener;
.line 324
iget v1, p1, Lcom/android/systemui/statusbar/phone/StatusBarWindowManager$State;->blurRatio:F
invoke-interface {v0, v1}, Lcom/android/systemui/statusbar/phone/StatusBarWindowManager$BlurRatioChangedListener;->onBlurRatioChanged(F)V
goto :goto_14
:cond_26
return-void
.end method- Save it.
Go back to the MiuiSystemUI folder, then use apktool < v2.6.0 to rebuild the decompiled files back to .apk file:
$ apktool b -fc .The new MiuiSystemUI.apk is now created and can be located inside the newly created dist/ folder.
We're almost done! With the modified MiuiSystemUI.apk in hand, you can now bring back the blur on your device. There are two methods here:
- Create a magisk module.
- Replace the stock
MiuiSystemUI.apkfile with the modified one.
It's recommended to just use a magisk module, so you can replace the MiuiSystemUI.apk systemlessly. Creating a magisk module is not included in this guide, we'll just use the second method.
Go to your custom recovery, mount /system, then push the modified MiuiSystemUI.apk to /system/priv-app/MiuiSystemUI/. This will overwrite the stock MiuiSystemUI.apk, so make sure that you made a backup before doing this.
$ adb push MiuiSystemUI.apk /system/priv-app/MiuiSystemUI/Reboot to system.
Your warranty is now void. I'm not responsible if you bricked your device. You are choosing to make this modifications.