com.telly.groundy.DetachableResultReceiver Maven / Gradle / Ivy

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/*
 * Copyright 2013 Telly Inc.
 *
 * 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.telly.groundy;

import android.os.Bundle;
import android.os.Handler;
import android.os.ResultReceiver;
import android.util.Log;

/**
 * Proxy {@link android.os.ResultReceiver} that offers a listener interface that can be
 * detached. Useful for when sending callbacks to a {@link android.app.Service} where a
 * listening {@link android.app.Activity} can be swapped out during configuration changes.
 */
public class DetachableResultReceiver extends ResultReceiver {
  private static final String TAG = "DetachableResultReceiver";

  private Receiver mReceiver;

  public DetachableResultReceiver(Handler handler) {
    super(handler);
  }

  public void clearReceiver() {
    mReceiver = null;
  }

  public void setReceiver(Receiver receiver) {
    mReceiver = receiver;
  }

  public interface Receiver {
    public void onReceiveResult(int resultCode, Bundle resultData);
  }

  @Override
  protected void onReceiveResult(int resultCode, Bundle resultData) {
    if (mReceiver != null) {
      mReceiver.onReceiveResult(resultCode, resultData);
    } else {
      Log.w(TAG, "Dropping result on floor for code " + resultCode + ": "
          + resultData.toString());
    }
  }
}