Question

I am working on Turning ON/OFF Camera flashlights.

What i want to do is :

1. When user clicks on Start LED button, it should start the Camera LED.
2. Stop camera LED automatically after n Seconds eg. after 30seconds (Thats totally based on user settings).
3. Stop Camera LED when user presses “Stop LED” Button

I have used ToggleButton for Starting and Stopping Camera LED.

Here is what i have done :

 toggleLED.setOnClickListener(new OnClickListener() {  
            public void onClick(View v) {      

                if (toggleLED.isChecked())
                {
                    startLED();
                }
                else      
                {
                    stopLED();
                }
            }
        });

So far i got success in turning ON and OFF Camera Lights.

For Turning On :

void startLED(){
    Camera cam;
    cam = Camera.open();     
    Parameters params = cam.getParameters();
    params.setFlashMode(Parameters.FLASH_MODE_ON);
    cam.setParameters(params);
    cam.startPreview();
    cam.autoFocus(new AutoFocusCallback() {
                public void onAutoFocus(boolean success, Camera camera) {
                }
     });
}

For Turning OFF :

void stopLED() {
    cam.stopPreview();
    cam.release();
}

ToggleButton’s function is working fine.

But what i want is :
How can i shut off Camera Lights after n Seconds ?

Edited:

I tried using this & it completely works fine..But i want to know whether i am going in a correct way or not..

 Runnable r = new Runnable()
              {
                  public void run()
                  {
                      stopLED();                  

                  }
              };


toggleLED.setOnClickListener(new OnClickListener() {  
            public void onClick(View v) {      
                // Perform action on clicks     



                if (toggleLED.isChecked())
                {
                    startLED();                 

                    int onledseconds=pref.getInt(MySettings.SHUTOFF_PERIOD,0);                  

                    if(onledseconds!=0)
                        handler.postDelayed(r,ledonseconds);
                }
                else      
                {

                    stopLED();
                }
            }
        });      

Answer 1

I tried using this & it completely works fine..But i want to know whether i am going in a correct way or not..

Runnable r = new Runnable()
{
   public void run()
   {
      stopLED();                  
   }
};
toggleLED.setOnClickListener(new OnClickListener() {  
  public void onClick(View v) {      
    // Perform action on clicks     
    if (toggleLED.isChecked())
    {
       startLED();                 
       int onledseconds=pref.getInt(MySettings.SHUTOFF_PERIOD,0);                  
       if(onledseconds!=0)
       handler.postDelayed(r,ledonseconds);
    }
    else      
    {
      stopLED();
    }                     
  }
});