src/com/android/deskclock/AlarmPreference.java

/*
 * Copyright (C) 2008 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.deskclock;

import android.content.Context;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.AsyncTask;
import android.preference.RingtonePreference;
import android.provider.Settings;
import android.util.AttributeSet;

/**
 * The RingtonePreference does not have a way to get/set the current ringtone so
 * we override onSaveRingtone and onRestoreRingtone to get the same behavior.
 */
public class AlarmPreference extends RingtonePreference {
    private Uri mAlert;
    private boolean mChangeDefault;
    private AsyncTask mRingtoneTask;

    public AlarmPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onSaveRingtone(Uri ringtoneUri) {
        setAlert(ringtoneUri);
        if (mChangeDefault) {
            // Update the default alert in the system.
            Settings.System.putString(getContext().getContentResolver(),
                    Settings.System.ALARM_ALERT,
                    ringtoneUri == null ? null : ringtoneUri.toString());
        }
    }

    @Override
    protected Uri onRestoreRingtone() {
        if (RingtoneManager.isDefault(mAlert)) {
            return RingtoneManager.getActualDefaultRingtoneUri(getContext(),
                    RingtoneManager.TYPE_ALARM);
        }
        return mAlert;
    }

    public void setAlert(Uri alert) {
        mAlert = alert;
        if (alert != null) {
            setSummary(R.string.loading_ringtone);
            if (mRingtoneTask != null) {
                mRingtoneTask.cancel(true);
            }
            mRingtoneTask = new AsyncTask<Uri, Void, String>() {
                @Override
                protected String doInBackground(Uri... params) {
                    Ringtone r = RingtoneManager.getRingtone(
                            getContext(), params[0]);
                    if (r == null) {
                        r = RingtoneManager.getRingtone(getContext(),
                                Settings.System.DEFAULT_ALARM_ALERT_URI);
                    }
                    if (r != null) {
                        return r.getTitle(getContext());
                    }
                    return null;
                }

                @Override
                protected void onPostExecute(String title) {
                    if (!isCancelled()) {
                        setSummary(title);
                        mRingtoneTask = null;
                    }
                }
            }.execute(alert);
        } else {
            setSummary(R.string.silent_alarm_summary);
        }
    }

    public Uri getAlert() {
        return mAlert;
    }

    public void setChangeDefault() {
        mChangeDefault = true;
    }
}