How to programmatically turn torch-flash light on

Question

I am using LG Optimus 3D model, I am able to turn on the torch light when I switch the camera to video recording mode. In normal capture mode, I am only able to turn on flash light.

I have tried several way by adding different parameters into the Camera object, but none of them work. My code is as below:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_flash_light);



    PackageManager pm = getPackageManager();

    if (! pm.hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)){
        Toast.makeText(this, "Your phone does not have flash light support.", Toast.LENGTH_LONG).show();
        finish();
    }

    camera = Camera.open(); 
    cParameters = camera.getParameters();



    cParameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
camera.setParameters(cParameters);

}

No point I cannot turn it on programmatically, I have checked as below to ensure my phone support torch mode, in fact, I am really able to turn on for my device.

List<String> abc = cParameters.getSupportedFlashModes();

        for (String a : abc){
            Log.d("mode: ", a);
}

Please help, anyway to do that? * The firmware is 2.2

Answer 1

use the following

 context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);

to see if a flash is available or not. It will will return true or false.

More here on how to actually implement the code.

How to turn on the Android Flashlight

Use camera flashlight in Android

How to turn on camera flash light programmatically in Android?