Flash Light not enabling in SAMSUNG Mobile

Question

I am trying to enable the Flash Light in SamSung mobile but its not getting turned on. here is my code

Camera mycam = Camera.open();
Parameters p = mycam.getParameters();
p.setFlashMode(Parameters.FLASH_MODE_OFF);// = mycam.getParameters();
p.setFlashMode(Parameters.FLASH_MODE_ON); 
mycam.setParameters(p);

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.FLASHLIGHT"/>

And the permissions in manifest is above:

Thanks in Advance Ranganath.T.M

Here talk about enable flash in Galaxy Tab, meybe can be useful: http://stackoverflow.com/questions/5017455/how-to-use-camera-flash-led-as-torch-on-a-samsung-galaxy-tab — Manu, Nov 04 '11 at 12:51
what does parameters.getSupportedFlashModes() give you? It's possible that the flash modes aren't supported — Chris Bye, Nov 04 '11 at 12:53
@Slothsberry parameters.getSupportedFlashModes() is giving like off,auto,on — ranganath.t.m, Nov 04 '11 at 13:05
so you cant even try torch mode. I've got a workaround to try, coming in an answer — Chris Bye, Nov 04 '11 at 13:19
@Slothsberry, i tried with it the result is same the troch not enabled — ranganath.t.m, Nov 04 '11 at 13:22

score 1 · Answer 1 · answered Nov 04 '11 at 13:33

This is the workaround I use on my Samsung Galaxy Ace for the flashlight. I essentially continuously auto-focus the camera, because the LED only turns on during auto-focus.

AutoFocusCallback autoFocusCallback = new AutoFocusCallback();
autoFocusCallback.setHandler(handler, message);
//Log.d(TAG, "Requesting auto-focus callback");
camera.autoFocus(autoFocusCallback);


class AutoFocusCallback implements Camera.AutoFocusCallback {

  private Handler autoFocusHandler;
  private int autoFocusMessage;

  void setHandler(Handler autoFocusHandler, int autoFocusMessage) {
    this.autoFocusHandler = autoFocusHandler;
    this.autoFocusMessage = autoFocusMessage;
  }

  public void onAutoFocus(boolean success, Camera camera) {
      Message message = autoFocusHandler.obtainMessage(autoFocusMessage, success)}
      autoFocusHandler.sendMessage(message)
      autoFocusHandler = null;
  }  
}

TORCH_MODE_ON would be preferable, but since it isn't supported, this is the best way I've found, if you simply must have the flashlight.

Hey can you tell me what your how handler object looks like ?.. What are you doing in that handler object ? — Kartik Domadiya, Dec 08 '11 at 13:20
@Slothsberry i am not able to get how to use this , can you please elaborate it clearly . — RajaReddy PolamReddy, Dec 12 '11 at 10:45
@Slothsberry: please could you explain how the handler object works? Thanks! — Ivan, Dec 28 '11 at 20:13

Flash Light not enabling in SAMSUNG Mobile

1 Answers1

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