Android Open Source - spring-android-samples Abstract Async Activity

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The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2010-2014 the original author or authors.
 */*from  w  w  w  .  ja  v a  2 s.  com*/
 * 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.springframework.android.showcase;

import android.app.Activity;
import android.app.ProgressDialog;

/**
 * @author Roy Clarkson
 * @author Pierre-Yves Ricau
 */
public abstract class AbstractAsyncActivity extends Activity implements AsyncActivity {

  protected static final String TAG = AbstractAsyncActivity.class.getSimpleName();

  private ProgressDialog progressDialog;

  private boolean destroyed = false;

  // ***************************************
  // Activity methods
  // ***************************************
  @Override
  protected void onDestroy() {
    super.onDestroy();
    this.destroyed = true;
  }

  // ***************************************
  // Public methods
  // ***************************************
  public void showLoadingProgressDialog() {
    this.showProgressDialog("Loading. Please wait...");
  }

  public void showProgressDialog(CharSequence message) {
    if (this.progressDialog == null) {
      this.progressDialog = new ProgressDialog(this);
      this.progressDialog.setIndeterminate(true);
    }

    this.progressDialog.setMessage(message);
    this.progressDialog.show();
  }

  public void dismissProgressDialog() {
    if (this.progressDialog != null && !this.destroyed) {
      this.progressDialog.dismiss();
    }
  }

}

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