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package com.google.android.libraries.backup;
import android.content.Context;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.support.annotation.Nullable;
import android.support.annotation.VisibleForTesting;
/**
* Utility class of static methods to help process shared preferences for backup and restore.
*/
public class PreferenceBackupUtil {
@VisibleForTesting
@Nullable
static String getRingtoneTitleFromUri(Context context, @Nullable String uri) {
if (uri == null) {
return null;
}
Ringtone sound = RingtoneManager.getRingtone(context, Uri.parse(uri));
if (sound == null) {
return null;
}
return sound.getTitle(context);
}
/**
* Get ringtone uri from a preference key in a shared preferences file, retrieve the associated
* ringtone's title and, if possible, save the title to the target preference key.
*
* @param srcRingtoneUriPrefKey preference key of the ringtone uri.
* @param dstRingtoneTitlePrefKey preference key where the ringtone title should be put.
* @return whether the ringtoneTitleKey was set.
*/
public static boolean encodeRingtonePreference(Context context, String prefsName,
String srcRingtoneUriPrefKey, String dstRingtoneTitlePrefKey) {
SharedPreferences preferences = context.getSharedPreferences(prefsName, Context.MODE_PRIVATE);
String uri = preferences.getString(srcRingtoneUriPrefKey, null);
String title = getRingtoneTitleFromUri(context, uri);
if (title == null) {
return false;
}
preferences.edit().putString(dstRingtoneTitlePrefKey, title).apply();
return true;
}
@VisibleForTesting
@Nullable
static String getRingtoneUriFromTitle(Context context, @Nullable String title, int ringtoneType) {
// Check whether the ringtoneType is a valid combination of the 3 ringtone types.
if ((ringtoneType == 0)
|| ((RingtoneManager.TYPE_ALL & ringtoneType) != ringtoneType)) {
throw new IllegalStateException();
}
if (title == null) {
return null;
}
RingtoneManager manager = new RingtoneManager(context);
manager.setType(ringtoneType);
Cursor cur = manager.getCursor();
for (int i = 0; i < cur.getCount(); i++) {
Ringtone ringtone = manager.getRingtone(i);
if (ringtone.getTitle(context).equals(title)) {
return manager.getRingtoneUri(i).toString();
}
}
return null;
}
/**
* Get ringtone title from a preference key of a shared preferences file, find a ringtone with the
* same title and, if possible, save its uri to the target preference key.
*
* @param dstRingtoneUriPrefKey preference key where the ringtone uri should be put.
* @param srcRingtoneTitlePrefKey preference key of the ringtone title.
* @return whether the ringtoneUriKey was set.
*/
public static boolean decodeRingtonePreference(Context context, String prefsName,
String dstRingtoneUriPrefKey, String srcRingtoneTitlePrefKey, int ringtoneType) {
SharedPreferences preferences = context.getSharedPreferences(prefsName, Context.MODE_PRIVATE);
String title = preferences.getString(srcRingtoneTitlePrefKey, null);
String uri = getRingtoneUriFromTitle(context, title, ringtoneType);
if (uri == null) {
return false;
}
preferences.edit().putString(dstRingtoneUriPrefKey, uri).apply();
return true;
}
}
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