Returns true if the camera supports torch mode (flash always on). - Android Camera

Android examples for Camera:Camera Flash

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Description

Returns true if the camera supports torch mode (flash always on).

Demo Code

/* /*from w w w .  j a  va 2 s. c  o m*/
 * Copyright 2012 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.List;

import android.hardware.Camera;

public class Main {
    /** Returns true if the camera supports torch mode (flash always on). */
    public static boolean cameraSupportsTorch(Camera camera) {
        return getFlashModes(camera).contains("torch");
    }

    /** Returns a list of available camera flash modes. If the Android API doesn't support getting flash modes (requires 2.0 or later),
     * returns a list with a single element of "off", corresponding to Camera.Parameters.FLASH_MODE_OFF.
     */
    public static List<String> getFlashModes(Camera camera) {
        Camera.Parameters params = camera.getParameters();
        try {
            Method flashModesMethod = params.getClass().getMethod(
                    "getSupportedFlashModes");
            List<String> result = (List<String>) flashModesMethod
                    .invoke(params);
            if (result != null)
                return result;
        } catch (Exception ignored) {
        }
        return Collections.singletonList("off");
    }
}

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