I saw how this application ([Cardiograph](https://play.google.com/store/apps/details?id=com.macropinch.hydra.android)) uses a bright flashlight, and then it switches to a dim one. The phone itself (Samsung Galaxy A10s) does not have a built-in flash brightness control, and there is no root either. So, how can you adjust the power of a flashlight, what applications are there for this (maybe even somehow through Termux)? Samsung Galaxy A10s phone, Android 11, all updates installed. [Video](https://youtu.be/B1TyDSkukOs)

I've always wondered with flashlight apps, especially ones that use the LED light(s): Is there any risk of shortening the life of the LEDs? I noticed one app ("ASettings") gives a warning that doing so can "harm your phone"... which to me sounds even more ominous than burning out the bulb. I thought LEDs had a crazy long lifespan to begin with, so do I need to worry?

I want to turn on the torch on the device by pressing the power button 3 times(or something convenient) and display a notification saying "Flashlight ON" and turn it off by simply swiping out(clearing) the notification. I have achieved this by creating 2 macros in Macrodroid . But I wanted to do the same exact thing with Tasker because obviously tasker can do a lot of things whereas macrodroid is limited to only a set of things and its not worth using both of them at the same time.

I am soon going on a field trip and would like to give my friends the ability to use the flash light from the phone without giving them the pattern to unlock the phone. Is that possible to add the flashlight/torch to the locked screen just like the camera? I have a Galaxy S5 with Android 4.4.2

I am not able to use Rear Camera and Flash Light in My Lenovo K6 Note. Front Camera Works Well. When I open Camera App, by default it Opens with Front Camera. Rear Camera Option is Not Found. (Front Camera works Perfectly Fine) Even when i opened WhatsApp and Take a pic, only front camera is shown. No Button to switch To Rear Camera. (Front Camera works Perfectly Fine) When i swipe Down the status Bar and try to switch on 'Flash Torch light'. it is not working. In Stock Rom, Front and Rear Camera Works Fine even Flash Light Works Fine. **Solutions Tried** * https://forum.xda-developers.com/showpost.php?p=71423852&postcount=112 Tried But Not Working (Both Solution not Working) * Download libmmcamera2_sensor_modules.so from my github, override /system/vendor/lib/libmmcamera2_sensor_modules.so in your phone, take care file permission, then reboot your phone. Even This Is not Working * Used Rom lineage-14.1-20180319-UNOFFICIAL-karate . Not working * Used Validus_Karate.zip still not working same Problem As above **Device:** Device : Lenovo K6 Note Android Version : 7.1.2 Os : lineage-14.1-20180319-UNOFFICIAL-karate (Flashed Using TWRP) Rooted : Yes **Just a Doubt** I downloaded 'karate' and there is a rom with name 'karateP' . I have a no idea what is it, Im a noob. Am i facing problem because of this ? I am Not sure.!

Recently my camera on my LG G4 has been having some issues and is not working at all. When opening the camera app either front or rear there is just a black screen and after a moment the message "camera unfortunately stopped working" and the app is closed. Also I have checked that the flashlight is not working but that must be related to the camera problem I guess. It is not the first time it happens. Sometime ago I had the same problem for about two weeks but the problem magically solved itself. But know it reappeared when I tried to open the camera through the locked screen menu while having another camera app which might be unrelated but I am not an expert. I have tried several usual methods to solve the problem: - Rebooted the phone; - Deleted Cache (Both camera app and gallery); - Deleted App Data; - Tried a third party app; - Factory Reset; **Nothing Worked!** I have know tried to use adb and android studio to see what kind of errors are issued and what I got was this: --------- beginning of crash 02-03 22:31:11.147 3599-10463/? E/AndroidRuntime: FATAL EXCEPTION: Camera Handler Thread Process: com.lge.camera, PID: 3599 java.lang.RuntimeException: Media server died. at com.lge.camera.device.CameraErrorCallback.onError(CameraErrorCallback.java:32) at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1232) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.os.HandlerThread.run(HandlerThread.java:61) 02-03 22:31:11.177 468-812/? E/ThermalEngine: ==== Enter sched_bmhb_cs_gov -> vs_temp = 26 === 02-03 22:31:11.342 2015-10552/? E/linker: readlink('/proc/self/fd/336') failed: Permission denied [fd=336] 02-03 22:31:11.342 2015-10552/? E/linker: warning: unable to get realpath for the library "/vendor/lib64/egl/eglSubDriverAndroid.so". Will use given name. I guess the interesting part of the log is this, but there are a lot of errors previously that can trigger failure. So I will post some of those since there are too many too fit them all here: 02-03 22:31:05.642 520-10471/? E/mm-camera-isp2:isp_module_start_session:178 session id 1 02-03 22:31:05.645 520-10472/? E/mm-camera: tcc_init: TCC ver.150418 02-03 22:31:05.646 520-10472/? E/mm-camera: q3a_port_init:2727 q3a_port_init: 3A VERSION --> 4.1.0.r2 02-03 22:31:05.647 520-10475/? E/mm-camera: module_faceproc_start_session:1752] session cnt 1 02-03 22:31:05.649 520-10471/? E/mm-camera-isp2: isp_module_start_session:347 num_session_opened 1 02-03 22:31:05.652 520-10472/? E/mm-camera: sensor_laser_init:117 Failure opening sensor library! Error: dlopen failed: library "/system/lib/hw/sensors.hal.tof.so" not found 02-03 22:31:05.652 520-10472/? E/mm-camera: gyro_port_init:1216 Failure initializing laser sensor. Error: 4 02-03 22:31:05.652 520-10472/? E/mm-camera: start_accel_sensor: sensor1_open E 02-03 22:31:05.653 520-10472/? E/mm-camera: start_accel_sensor: sensor1_open X, res = 0 02-03 22:31:05.705 520-10469/? E/mm-camera: module_sensor_init_session:1243flash subdev id = 0 02-03 22:31:05.705 468-814/? E/ThermalEngine: ACTION: CLUSTER - Setting CLUSTER to 1689600 02-03 22:31:05.707 520-10473/? E/mm-camera-pp: [INFO] base_module_start_session:91, E, session=1 02-03 22:31:05.707 520-10473/? E/mm-camera-pp: [INFO] base_module_start_session:91, E, session=1 02-03 22:31:05.710 520-10469/? E/mm-camera-sensor: sensor_sdk_util_get_kernel_i2c_addr_type:26Invalid addr_type = 0 02-03 22:31:05.710 520-10469/? E/mm-camera-sensor: sensor_sdk_util_get_kernel_i2c_data_type:40Invalid addr_type = 0 02-03 22:31:05.710 520-10469/? E/mm-camera-sensor: actuator_load_lib:491name=lc898122_claf, mode=camera 02-03 22:31:05.713 520-10469/? E/mm-camera-sensor: actuator_load_lib:491name=lc898122_claf, mode=camcorder 02-03 22:31:05.714 520-10469/? E/mm-camera-sensor: eeprom_do_af_calibration:197turn on Cal af(1) 02-03 22:31:05.714 520-10469/? E/mm-camera-sdk: eeprom_autofocus_calibration_claf:137 KSY Kernel original macro hall : 13600, inf hall : -10080, macro_mecha 21000, vcm_type 65 02-03 22:31:05.714 520-10469/? E/mm-camera-sdk: eeprom_autofocus_calibration_claf:141 KSY AF_algorithm convert macro hall : 350, inf hall : 0 02-03 22:31:05.714 520-10469/? E/mm-camera: ois_init:305start: ois_init 02-03 22:31:05.715 520-10469/? E/mm-camera: ois_init:372done: ois_init 02-03 22:31:05.715 520-10469/? E/mm-camera-sensor: proxy_init:71name = LD_AF 02-03 22:31:05.715 520-10503/? E/mm-camera: ois_thread:201ois thread is running 02-03 22:31:05.715 520-10469/? E/mm-camera-sensor: sensor_proxy_on:151enter 02-03 22:31:05.726 3599-3599/? E/PeerForWman: Watch Library is not activated! Call activate() first. 02-03 22:31:05.733 520-10469/? E/mm-camera-sensor: sensor_proxy_thread_on:198enter 02-03 22:31:05.733 520-10469/? E/mm-camera: module_sensor_init_session:1354tcs_sensor init Enter ** 02-03 22:31:05.735 468-814/? E/ThermalEngine: ACTION: CLUSTER - Setting CLUSTER to 1824000 02-03 22:31:05.746 468-814/? E/ThermalEngine: ACTION: CLUSTER - Setting CLUSTER to 1689600 02-03 22:31:05.760 520-10469/? E/mm-camera-sensor: tcs_thread_create:291tcs_thread, thread_id 0 02-03 22:31:05.760 520-10469/? E/mm-camera: module_sensor_start_session:1626SUCCESS 02-03 22:31:05.760 520-520/? E/mm-camera: sensor_get_cur_chromatix_name:2417Error: Load default preview chroamtix 02-03 22:31:05.761 520-520/? E/mm-camera-isp2: isp_resource_query_mod:145 num_isp_preallocate 1 num_session_opened 1 dual_vfe_enabled 0 02-03 22:31:05.761 520-520/? E/mm-camera: module_faceproc_query_mod:1904] Caps ROI 5 scene_mode_cnt 1 HW analysis supported 0 02-03 22:31:05.761 520-520/? E/hdr: module_hdr_lib_query_mod:181] Supported scenemode cnt 2 02-03 22:31:05.761 520-520/? E/mm-camera: isp_port_check_caps_reserve:737 port 0xf4c7f0a0 ide 1000f type 10 dim 0 0 02-03 22:31:05.762 520-520/? E/mm-camera: int_link = 0xf41b76c0 02-03 22:31:05.763 520-520/? E/mm-camera: Interleaved flag is 0, identity 65551 port type 0 02-03 22:31:05.763 520-520/? E/mm-camera: pproc_port_add_modules_to_stream:454] X rc: 1 02-03 22:31:05.769 468-814/? E/ThermalEngine: ACTION: CLUSTER - Setting CLUSTER to 1824000 02-03 22:31:05.769 468-814/? E/ThermalEngine: ACTION: CLUSTER - Setting CLUSTER to 1689600 02-03 22:31:05.778 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.778 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.778 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.778 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.778 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.778 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.778 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.778 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.778 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.778 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.779 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.779 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.779 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.779 10487-10487/? E/AppUp4:MvnoProfileEntry: getIdByRule : not matching 02-03 22:31:05.797 450-450/? E/QCameraHWI_Mem: void qcamera::QCameraMemory::traceLogAllocStart(size_t, int, const char*):HeapMemsize 656704 02-03 22:31:05.798 450-450/? E/QCameraHWI_Mem: void qcamera::QCameraMemory::traceLogAllocStart(size_t, int, const char*):Memsize 656704 02-03 22:31:05.798 450-450/? E/QCameraHWI_Mem: void qcamera::QCameraMemory::traceLogAllocEnd(size_t) 656704 02-03 22:31:05.798 450-450/? E/QCameraHWI_Mem: void qcamera::QCameraMemory::traceLogAllocEnd(size_t) 656704 02-03 22:31:05.802 450-450/? E/LGCameraParameters: void qcamera::QCameraParameters::initDefaultParametersEx(): multi_window_af_supported = 1 02-03 22:31:05.802 450-450/? E/LGCameraParameters: createMultiWindowString: (-280,-280,0,0,1),(-140,-420,140,-140,1),(0,-280,280,0,1),(-420,-140,-140,140,1),(-140,-140,140,140,1),(140,-140,420,140,1),(-280,0,0,280,1),(-140,140,140,420,1),(0,0,280,280,1),(-220,-220,220,220,1) 02-03 22:31:05.802 450-450/? E/LGCameraParameters: createMultiWindowString: (720,720,1000,1000,1),(860,580,1140,860,1),(1000,720,1280,1000,1),(580,860,860,1140,1),(860,860,1140,1140,1),(1140,860,1420,1140,1),(720,1000,1000,1420,1),(860,1140,1140,1420,1),(1000,1000,1280,1280,1) 02-03 22:31:05.802 450-450/? E/LGCameraParameters: int32_t qcamera::QCameraParameters::setBeautyLevel(int) : [ARC_BEAUTY] beautylevel = 20 02-03 22:31:05.803 520-10518/? E/mm-camera: sensor_set_frame_rate:1082max fps 30.030001 min fps 2.000000,fixed_frame_rate=0 02-03 22:31:05.803 520-10518/? E/mm-camera: iface_util_set_hfr: can't find hw stream, only save hfr mode 02-03 22:31:05.807 450-10465/? E/QCameraStateMachine: int32_t qcamera::QCameraStateMachine::procEvtPreviewStoppedState(qcamera::qcamera_sm_evt_enum_t, void*): cannot handle evt(31) in state(0) 02-03 22:31:05.807 450-10465/? E/QCameraStateMachine: int32_t qcamera::QCameraStateMachine::procEvtPreviewStoppedState(qcamera::qcamera_sm_evt_enum_t, void*): cannot handle evt(31) in state(0) Other informations about the phone is that it is not rooted and has no custom ROM installed by me. I really hope there is someone who can help me with this because this camera would serve me well!

I have Nexus 4 on Android 5.0 Lollipop, and I'm using Tasker. Is there any way to get the Flashlight to turn on when screen is off and the volume up or down button is held for 2-3 seconds? Then turn off the flashlight if the button is held again. I know there's a %SCREEN variable for the screen part, but how can I detect if a volume button is held?

I've always had a torch icon in the quick settings tray, for example (from another phone): However mine now looks like this: I think it happened after I tried taking a video with the stock camera app (Nexus 5X). As a workaround I can turn it on by enabling the flash when about to record a video, but this is really inconvenient. I'd like to be able to switch it on without unlocking the phone.

The L.E.D. on a LG l90 Android I recently purchased does not light up. I have tried going to setting, but can find no toggle switch to activate the L.E.D. What should i do?

I am being told by my device (HTC one E8) that the camera flash (and thereby flashlight app) and portable wifi hotspot cannot work at the same time. I dont see any logical connection between the two, question is can anyone explain the reason this is happening and any workarounds/alternatives

I have a Samsung Galaxy S Duos (GT-S7562L). The camera is good, but its flash is so strong that after the photo we have to wait for 1 or 2 minutes to our eyes be able to see all clearly - it is like to when you see the sun light directly. So I would like to change flash brightness in some way: hardware or software. The easier but ugliest hardware way is to use a semi-transparent sticker in front of lens. Do you know any way to change flash brightness entering some hidden settings (common settings do not have that option) or using another settings app or camera app? The phone is not rooted, but I accept solutions in this way.

I am having multiple issues on my Micromax Yureka after upgrading to Lollipop: 1. I am unable to pick up calls & the display is not coming on 2. USB storage connection is not functioning & won't connect to the computer 3. Unable to stop the mobile data when it's already connected, when I click the data option, it's going the open the data usage details only. 4. Rear camera flash not properly functioning, it's not timely flashing. How can I fix the issues?

I'm on Android 5 KitKat but I've seen this in Android 4.x as well. The stock camera app has the settings for contrast sharpness brightness etc. I always want the sharpness to be maximum along with the contrast, that is, high values for both these parameters. I change them and later on they will reset to defaults. I tried to use other apps like open camera but they are not native apps and their control of the camera is not that good. My question is how do I permanently keep these high contrast and high sharpness settings without the defaults taking over periodically. And corollary to that , I wonder what event causes the settings to be reset to default... is it a certain time period? Or after coming from sleep. I wanted to know if there's some sort of a settings file which I can edit to permanently keep these modified settings. I'm attaching a picture of what the look like. Please don't recommend an alternate app. I would like to know what I can do with this app.

I've got a brandnew OnePlus One with Cyanogenmod 12 on it, and the device is rooted. I like the offscreen gestures very much. But sometimes they are triggered accidentally. This is very costy when the flashlight is turning on and you don't get it. So my thought was, to write a task with Tasker, which let the phone vibrate, when the flashlight has been enabled. But unfortunately I have no clue how. I looked for a solution in the web, but I didn't find anything. So maybe you have an idea how I could achieve this. Thanks in advance.

As you know, on cm12 does not exist Torch.apk. Flashlight run on toggle in quick settings. I am wondering, which one application contain flashlight activity? I was Googling, but can't find an answer.

Flashlight in Android seems to be "entangled" with Camera, leading to UI, power consumption, privacy and other issues. Are there Android devices with a torch, but without a camera at all? How the LED is managed there?

Where can I find some good documentation concerning how to use the features of the camera application installed on the Samsung Galaxy SIII and how these features work under-the-hood? I would like to improve my shots taken with the cameraphone. Thanks.

In my accessibility settings on my Samsung Galaxy Ace Plus (GT-S7500), there is an "Assistive light" option that "Turn[s] on torch to see better". It activates the light on the back of the device. Is there a way I can activate the light quickly without having to go through the accessibility settings? ps: If someone could tag this with "torch" and possibly also "gt-s7500", that would be great.

Ever since I updated the software on my Galaxy S3 the camera light flashes randomly all day, it also flashes when my alarm goes off. I cannot find anywhere in my settings how to disable this annoying light. My flash notification is not checked off. Please help!

With Android version 4.3 for my Samsung Galaxy S3 (or perhaps just Verizon's flavor of it) my camera flash has begun to blink **very brightly** when I am receiving an incoming call. How can I turn this off? I've been through the settings and nothing obvious really jumps out at me.