set Enabled State via Alpha for View - Android User Interface

Android examples for User Interface:View Enable

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Description

set Enabled State via Alpha for View

Demo Code

/*//from ww w.j a  v a 2  s . com
 * Copyright (C) 2009 The Android Open Source Project
 *
 * 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.
 */
import android.view.View;

public class Main {
  private static final float ALPHA_ENABLE = 1.0F;
  private static final float ALPHA_DISABLE = 0.3F;

  public static void setEnabledState(View view, boolean enabled) {
    if (view != null) {
      float alpha = enabled ? ALPHA_ENABLE : ALPHA_DISABLE;
      view.setAlpha(alpha);
    }
  }
}

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