Android Open Source - droidengine2d Activity Utilities

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License

The source code is released under:

Apache License

Java Source Code

/*   Copyright 2013-2014 Miguel Vicente Linares
 */*  w  w w  .  jav a2 s . c om*/
 *  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.miviclin.droidengine2d.util;

import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;
import android.content.pm.ConfigurationInfo;
import android.content.res.Configuration;
import android.os.Build;
import android.view.Display;
import android.view.Surface;

import com.miviclin.droidengine2d.BuildConfig;

/**
 * ActivityUtilities.
 * 
 * @author Miguel Vicente Linares
 * 
 */
public final class ActivityUtilities {

  /**
   * Private constructor to prevent the instantiation of this utility class.
   */
  private ActivityUtilities() {
    super();
  }

  /**
   * Checks if the device supports OpenGL ES 2.0.<br>
   * NOTE: If the app is running on the Android emulator, this method returns always true.
   * 
   * @param activity Activity.
   * @return true if OpenGL ES 2.0 is supported, false otherwise
   */
  public static boolean detectOpenGLES20(Activity activity) {
    ActivityManager am = (ActivityManager) activity.getSystemService(Context.ACTIVITY_SERVICE);
    ConfigurationInfo info = am.getDeviceConfigurationInfo();
    if (BuildConfig.DEBUG) {
      if (Build.FINGERPRINT.startsWith("generic")) {
        return true;
      }
    }
    return (info.reqGlEsVersion >= 0x20000);
  }

  /**
   * Calculates the default orientation of the device.<br>
   * The default orientation of most phones is portrait, and the default orientation of most tablets is landscape.
   * 
   * @param activity Activity.
   * @return {@link Configuration#ORIENTATION_PORTRAIT} or {@link Configuration#ORIENTATION_LANDSCAPE}
   */
  public static int getDefaultOrientationOfDevice(Activity activity) {
    Configuration configuration = activity.getResources().getConfiguration();
    boolean orientationLandscape = (configuration.orientation == Configuration.ORIENTATION_LANDSCAPE);

    Display display = activity.getWindowManager().getDefaultDisplay();
    int rotation = display.getRotation();
    boolean parallelToDefaultVerticalAxis = (rotation == Surface.ROTATION_0) || (rotation == Surface.ROTATION_180);

    boolean defaultOrientationLandscape = (parallelToDefaultVerticalAxis && orientationLandscape) ||
        (!parallelToDefaultVerticalAxis && !orientationLandscape);

    if (defaultOrientationLandscape) {
      return Configuration.ORIENTATION_LANDSCAPE;
    }
    return Configuration.ORIENTATION_PORTRAIT;
  }

}

Java Source Code List

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