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/*
* Copyright (C) 2010 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.
*/
package com.android.dialer.app.calllog;
import android.content.Context;
import android.os.AsyncTask;
import android.provider.CallLog.Calls;
import com.android.dialer.common.Assert;
/**
* Class to access the call log asynchronously to avoid carrying out database operations on the UI
* thread, using an {@link AsyncTask}.
*
* <pre class="prettyprint"> Typical usage: ==============
*
* // From an activity... String mLastNumber = "";
*
* CallLogAsync log = new CallLogAsync();
*
* CallLogAsync.GetLastOutgoingCallArgs lastCallArgs = new CallLogAsync.GetLastOutgoingCallArgs(
* this, new CallLogAsync.OnLastOutgoingCallComplete() { public void lastOutgoingCall(String number)
* { mLastNumber = number; } }); log.getLastOutgoingCall(lastCallArgs); </pre>
*/
public class CallLogAsync {
/** CallLog.getLastOutgoingCall(...) */
public AsyncTask getLastOutgoingCall(GetLastOutgoingCallArgs args) {
Assert.isMainThread();
return new GetLastOutgoingCallTask(args.callback).execute(args);
}
/** Interface to retrieve the last dialed number asynchronously. */
public interface OnLastOutgoingCallComplete {
/** @param number The last dialed number or an empty string if none exists yet. */
void lastOutgoingCall(String number);
}
/** Parameter object to hold the args to get the last outgoing call from the call log DB. */
public static class GetLastOutgoingCallArgs {
public final Context context;
public final OnLastOutgoingCallComplete callback;
public GetLastOutgoingCallArgs(Context context, OnLastOutgoingCallComplete callback) {
this.context = context;
this.callback = callback;
}
}
/** AsyncTask to get the last outgoing call from the DB. */
private class GetLastOutgoingCallTask extends AsyncTask<GetLastOutgoingCallArgs, Void, String> {
private final OnLastOutgoingCallComplete mCallback;
public GetLastOutgoingCallTask(OnLastOutgoingCallComplete callback) {
mCallback = callback;
}
// Happens on a background thread. We cannot run the callback
// here because only the UI thread can modify the view
// hierarchy (e.g enable/disable the dial button). The
// callback is ran rom the post execute method.
@Override
protected String doInBackground(GetLastOutgoingCallArgs... list) {
String number = "";
for (GetLastOutgoingCallArgs args : list) {
// May block. Select only the last one.
number = Calls.getLastOutgoingCall(args.context);
}
return number; // passed to the onPostExecute method.
}
// Happens on the UI thread, it is safe to run the callback
// that may do some work on the views.
@Override
protected void onPostExecute(String number) {
Assert.isMainThread();
mCallback.lastOutgoingCall(number);
}
}
}
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