When Setting Flash Mode for Camera Paramters in zxing set Parameters failed exception in android

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I am integrating barcode scanning functionality using zxing in android, my app includes turn on/off flash light functionality by button press.

When the flash button is pressed it sets the flash to mode torch and that parameter is set to be a camera parameter. I got an exception: Set Paramters failed exception.

Here is my code.

    Parameters p = camera.getParameters();
    List<String> supportedFlashModes =p.getSupportedFlashModes();

    if (active)
        if(supportedFlashModes!= null)

I got the following exception:

06-07 12:15:26.107: E/AndroidRuntime(24642): FATAL EXCEPTION: main
06-07 12:15:26.107: E/AndroidRuntime(24642): java.lang.RuntimeException:
 setParameters failed
06-07 12:15:26.107: E/AndroidRuntime(24642):    at 
 android.hardware.Camera.native_setParameters(Native Method)

Please advice me how to resolve this issue?

I had the same problem with my Google Nexus One. The problem was solved for me by canceling autofocus, set parameters and then reset autofocus


Unfortunately its not an universal workaround since it does not work for S3 or Galaxy Nexus who totally loses it... S-G starts to flashes and S3 stop autofocus. I solved the issue for S3 by stoping preview and then restarting after the parameters were set

When Setting Flash Mode for Camera Paramters in - android, When Setting Flash Mode for Camera Paramters in zxing set Parameters failed exception in android - android. Paramters failed exception. Here is my code. Parameters p = camera.getParameters(); List<String> supportedFlashModes =p. Everything work fine, but there is a bug on Android 6.0, when need to request permission. After permission granted camera not configure. Black window instead.

I had the same problem, turning the flaslight with the camera on causes some autofocus collision, when setting the parameters at the same time (especially when your autofocus interval is low). Paste this right before enabling/disabling the flashlight, it will slow down the enabling event, but hey, no crash (not 100% crash proof though).

//sleep time should be long, 3000ms should be enough to prevent crash on some devices, 2000 may by to little (still crashes on Sony Xperia devices) - I have no idea wy this works that way :D

try {
     catch (InterruptedException e) {

Edit: Better way to solve this problem, is to put your setParameters method in a loop, and catch runtime exception everytime. Exit the loop when there is no exception, or when your (optional) loop counter reaches max value.

final int MAX_TRIES = 100;
boolean success = false;
int triesCounter = 0;
while (!success) {
 try {
 if (triesCounter > MAX_TRIES) {
 success = true;
 parameters = camera.getParameters();
 if (parameters != null) {
 success = true;
 } catch (Exception exception) {


android.hardware.Camera$Parameters.setFlashMode java code , Camera.Parameters parameters = camera.getParameters(); parameters. camera.release(); camera = null; } } catch (Exception e) { e. setFlashMode( mode); mFlash = flash; return true; } String currentMode origin: yipianfengye/ android-zxingLibrary else { Log.i(TAG, "Setting flash mode to " + flashMode); parameters. I'm facing kind of same problem, i'm using an AR library wich use oubviously use Camera and I develop my app from 16 and above but on marshmallow an exception occured "Failed to connect to Camera Service" So I read your comments so my Manisfest has this three lines : and in my graddle file : android {compileSdkVersion 23 buildToolsVersion "23.0.1"

Some of the devices do not support and gives such problems. You can refer the link bellow, so that you can get a clear idea about it. How to turn on camera flash light programmatically in Android?

android.hardware.Camera$Parameters.getFlashMode java code , null) { String flashMode = camera.getParameters(). Best Java code snippets using android.hardware. getParameters(); Smart code suggestions by Codota. } Get smart origin: journeyapps/zxing-android-embedded Setting Parameters . setParameters(cameraParameters); return true; }catch (Exception e) { e. The following are Jave code examples for showing how to use setPreviewDisplay() of the android.hardware.Camera class. You can vote up the examples you like. Your votes will be used in our system to get more good examples.

One solution that works is to create a queue of camera parameters. Setting the torch would add a torch parameter to the queue.

Inside the onAutoFocus callback, call a function that iterates through all of the queue items and commits them. This way you are guaranteed that you are not autofocusing.

Java Code Examples android.hardware.Camera.getParameters, This page provides Java code examples for android.hardware.Camera. getParameters(); String flashMode = params. + parameters.flatten()); if ( safeMode) { Log.w(TAG, "In camera config safe mode -- most settings will not be honored"); } parameters. @throws IOException Indicates the camera driver failed to open. Fixed issue where image taken is too dark sometimes even though flash is fired. (I5d9fa, b/149729613) Fix bug where buffer in ImageProxy from ImageCapture was not rewound (I0c455, b/153249512) Fixed the issues where binding ImageCapture only: (1) Failed to take photos with MAX_QUALITY; (2) Generated bad Image quality because auto exposure does

turning the flaslight with the camera on/trouch (FLASH_MODE_TORCH) causes some autofocus collision, when setting the parameters at the same time (especially when your autofocus interval is low).

I don't like the thread workaround. So I fixed it like this

private Boolean _flashOn = null;
private Runnable doAutoFocus = new Runnable() {
        public void run() {
            if (previewing) {
                if (_flashOn != null) {
                    Parameters p = mCamera.getParameters();
                    if (_flashOn) {
                    _flashOn = null;

No RuntimeException now.

But still has FLASH_MODE_TORCH + autoFocus bug on some adroid devices, e.g. Motorala Milestone/Samsun I9100G/Blahblah...

See also a declined issue for Android: https://code.google.com/p/android/issues/detail?id=14360

BTW. ZBar is faster than ZXing :)

CameraManager Java Source Code, package library.qinqinhealth.qrcode.embedded.barcodescanner.camera; import android.content. import library.qinqinhealth.qrcode.embedded.zxing.client. android.camera.open. RuntimeException: getParameters failed (empty parameters) if (safeMode) { Log.w(TAG, "In camera config safe mode -- most settings will� In our 'settings' dialog we let them set the Custom size using a slider from 1 to 100%. We find that 20% works well for slightly older devices so that is our default. It would be nice to be able to pre-set the default based on the camera's max resolution or on it's current resolution.

RuntimeException: getParameters failed (empty parameters) � Issue , AmbientLightManager; import com.google.zxing.client.android.camera. cameraInfo); return; } throw new RuntimeException("Failed to open camera"); } public void autoFocusManager = new AutoFocusManager(this.camera, this. settings); this. getParameters(); if (parameters == null || (flashMode = parameters. Dismiss Join GitHub today. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.

CameraManager.java, When Setting Flash Mode for Camera Paramters in zxing set Parameters failed exception in android. I am integrating barcode scanning functionality using zxing � The Android framework includes support for various cameras and camera features available on devices, allowing you to capture pictures and videos in your applications.

Barcode scanner for Android not scanning?, An implementation of the barcode scan service for Android. java/com/gluonhq/ charm/down/android/scan/zxing/camera/CameraManager.java + work stoppage, computer failure or malfunction, or any and all + Log.w(TAG, " Unexpected exception while focusing", re); + Log.i(TAG, "Setting flash mode to " + flashMode);.

  • you should post more code. for instance where are you getting camera (and how)... etc.
  • I have used zxing barcode scanning code as such.
  • sorry, I'm not familiar with it.
  • Ofc this isn't the final solution for the problem, somebody should look into the whole autofocus wibbly wobbly stuff.
  • and remember that sleep in the UI thread is not a good idea, read about asynctask
  • tourch bug list: OK[SONY C6503,MI-ONE Plus] NG[Motorala Milestone2, Samsun I9100G]
  • tourch bug list: OK[SONY C6503,MI-ONE Plus,Lenovo K800,HTC Desire HD] NG[Motorala Milestone2, Samsun I9100G]
  • Hi, is this code work for android ICS?. Because Thread.sleep() is deprecated in android ICS.
  • Yes I have tested it on Nexus with ICS 4.0.3, and it works fine.
  • Ok. We explicitly call the thread to wait for 2 sec . it causes to a black screen when camera page starts.