How to use already open Camera object in android?

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I am doing a project releated to livewallpaper, my app requirement is when the user Click the button camera preview set as wallpaper. i am doing all this stuff, but problem is after set the camera preview as wallpaper, when try to open the camera, it shows camera failed, i know we create only one camera object at a time, but problem was how to release the camera berfore the user use the camera in other applications and how to start camera preview in wallpaper after user close the camera application dynamically.
can any one give me an idea how can i do that?

Posted 5-Jan-14 18:02pm

Somanadh B

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Xiao Ling · Answer 1 · 2014-01-06T19:37:00

Solution 1

When you start another Activity, your previous Activity will be paused. The onPause() method will be triggered. so what you should do:

@Override
	protected void onPause() {
		// TODO Auto-generated method stub
		super.onPause();
		if (camera != null) {
			camera.stopPreview();
			camera.release();
			camera = null;
		}
	}

Posted 6-Jan-14 19:37pm

Xiao Ling

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Somanadh B 8-Jan-14 0:05am

thanks for reply, but i am not using camera in activity, i am using camera in wallpaper Engine class, so i did not know how to handle this, because user set camera as wallpaper then it runs continuously till the user did not open any camera applications, if user open the camera then service will be release that camera to reusable by other camera application, after camera application is closed, service will take the camera and continue the process. This is my app requirement.
I am using onvisibilitychange method in Wallpaper engine class,when this method returns false i relesing the camera, because of this other applications use the camera, but problem is when this method returns true it did not display the camera.
can you please give me an idea how to resolve this issue?

Somanadh B · Answer 2 · 2014-01-07T22:54:00

use the OnVisbilityChange() in Engine class to release the camera and start the camera.

@Override

C#

public void onVisibilityChanged(boolean visible) {
    // TODO Auto-generated method stub
    super.onVisibilityChanged(visible);
    if (visible) {
        try {
            //open the camera obj
        }catch(Exception e){
            e.printStackTrace();
        }

    }
    else {
        try {
            //release the camera obj
        }catch (RuntimeException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}