Android Open Source - retention-magic Activity

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License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright (C) 2013 Marten Gajda <marten@dmfs.org>
 */* w ww  . ja  v a2s . co  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 org.dmfs.android.retentionmagic;

import android.content.SharedPreferences;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.os.Bundle;


/**
 * An {@link android.app.Activity} that can retain field values.
 * 
 * @author Marten Gajda <marten@dmfs.org>
 */
public class Activity extends android.app.Activity
{
  private SharedPreferences mPrefs;


  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);

    mPrefs = getSharedPreferences(getPackageName() + ".sharedPrefences", 0);

    RetentionMagic.init(this, getIntent().getExtras());

    if (savedInstanceState == null)
    {
      RetentionMagic.init(this, mPrefs);
    }
    else
    {
      RetentionMagic.restore(this, savedInstanceState);
    }
  }


  @Override
  protected void onSaveInstanceState(Bundle outState)
  {
    super.onSaveInstanceState(outState);
    RetentionMagic.store(this, outState);
  }


  @Override
  protected void onPause()
  {
    super.onPause();
    /*
     * On older SDK version we have to store permanent data in onPause(), because there is no guarantee that onStop() will be called.
     */
    if (VERSION.SDK_INT < VERSION_CODES.HONEYCOMB)
    {
      RetentionMagic.persist(this, mPrefs);
    }
  }


  @Override
  protected void onStop()
  {
    super.onStop();
    if (VERSION.SDK_INT >= VERSION_CODES.HONEYCOMB)
    {
      RetentionMagic.persist(this, mPrefs);
    }
  }

}

Java Source Code List