Android Open Source - camp-food-manager Froyo Led Flashlight

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License

The source code is released under:

GNU General Public License

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Java Source Code

/*
 * Copyright (C) 2010 Sergej Shafarenka, beworx.com
 *//from  w ww . ja  va2s .  c  o  m
 * 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.V4Creations.FSMK.campfoodmanager.flash;

import android.content.Context;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.util.Log;

public class FroyoLedFlashlight implements Flashlight {

  private static final String TAG = "qs.floyoled";

  private static final String MODE_TORCH = Camera.Parameters.FLASH_MODE_TORCH;
  private static final String MODE_OFF = Camera.Parameters.FLASH_MODE_OFF;

  private Camera mCamera;

  public boolean isOn(Context context) {
    return mCamera != null
        && MODE_TORCH.equals(mCamera.getParameters().getFlashMode());
  }

  public boolean isSupported(Context context) {
    int sdkVersion = Constants.SDK_VERSION;
    Camera camera = null;
    try {
      camera = Camera.open();
      return sdkVersion >= 8 /* froyo */
          && camera.getParameters().getFlashMode() != null; /*
                                   * flash is
                                   * supported
                                   */
    } catch (Exception e) {
      Log.e(TAG, "isSupported", e);
      return false;
    } finally {
      if (camera != null) {
        camera.release();
      }
    }
  }

  public void setOn(boolean on, Context context) {
    Camera camera = mCamera;
    if (on) {
      if (camera == null) {
        mCamera = camera = Camera.open();
        camera.startPreview();
      }
      Parameters params = camera.getParameters();
      params.setFlashMode(MODE_TORCH);
      camera.setParameters(params);
    } else {
      if (camera != null) {
        try {
          Parameters params = camera.getParameters();
          params.setFlashMode(MODE_OFF);
          camera.setParameters(params);
        } finally {
          camera.release();
          mCamera = null;
        }
      }
    }
  }

  public int getType() {
    return TYPE_FROYO;
  }

}

Java Source Code List