#Android N Ringtone总结-优快云博客

本文链接：https://blog.youkuaiyun.com/bberdong/article/details/53009787

10月份什么都没写，怪不好意思的，今天赶紧补上一篇。这博客我是先在haroopad(ubantu)上写完之后才贴到优快云的markDown编辑器里的。效果非常棒，推荐

1.出厂默认铃声设置：

vendor/xiaomi(huawei and so on)/ config/common_full_phone.mk
# Default ringtone
PRODUCT_PROPERTY_OVERRIDES += \
    ro.config.ringtone=Ring_Synth_04.ogg \
    ro.config.notification_sound=pixiedust.ogg \
    ro.config.alarm_alert=Alarm_Classic.ogg \
    ro.config.mms_notification=pixiedust.ogg \
    ro.config.mail_send=pixiedust.ogg \
    ro.config.calendar_notification=pixiedust.ogg

2.读取mk的设置

//只有MediaScanner的构造函数中会调用，可能是刚开机的时候会ScanFile,具体
//先不深究
public MediaScanner(Context c, String volumeName) {
        native_setup();
        mContext = c;
        mPackageName = c.getPackageName();
        mVolumeName = volumeName;

        mBitmapOptions.inSampleSize = 1;
        mBitmapOptions.inJustDecodeBounds = true;

        setDefaultRingtoneFileNames();
...

private void setDefaultRingtoneFileNames() {
        mDefaultRingtoneFilename = SystemProperties.get(DEFAULT_RINGTONE_PROPERTY_PREFIX
                + Settings.System.RINGTONE);
        mDefaultNotificationFilename = SystemProperties.get(DEFAULT_RINGTONE_PROPERTY_PREFIX
                + Settings.System.NOTIFICATION_SOUND);
        mDefaultAlarmAlertFilename = SystemProperties.get(DEFAULT_RINGTONE_PROPERTY_PREFIX                                          + Settings.System.ALARM_ALERT);
    }

    //DEFAULT_RINGTONE_PROPERTY_PREFIX = “ro.config”
    //Settings.System.RINGTONE = ringtone

这个地方mk的值是怎么进来的，目前我还不懂。

3.设置铃声

...
//扫描到这几个文件夹的时候
private static final String RINGTONES_DIR = "/ringtones/";
private static final String NOTIFICATIONS_DIR = "/notifications/";
private static final String ALARMS_DIR = "/alarms/";
//boolean变量为true
boolean ringtones = (lowpath.indexOf(RINGTONES_DIR) > 0);
boolean notifications = (lowpath.indexOf(NOTIFICATIONS_DIR) > 0);
boolean alarms = (lowpath.indexOf(ALARMS_DIR) > 0);
...
//每次调用多个参数只有一个为true,其他为false.因为当前文件夹只有可能是其中之一
result = endFile(entry, ringtones, notifications, alarms, music, podcasts);
...
if (notifications && !mDefaultNotificationSet) {
                if (!TextUtils.isEmpty(mDefaultNotificationFilename)) {
                    if (doesPathHaveFilename(entry.mPath, mDefaultNotificationFilename))
                        needToSetSettings = true;
                }
            } else if (ringtones && !mDefaultRingtoneSet) {
                if (!TextUtils.isEmpty(mDefaultRingtoneFilename)) {
                    if (doesPathHaveFilename(entry.mPath, mDefaultRingtoneFilename))
                        needToSetSettings = true;
                }
            } else if (alarms && !mDefaultAlarmSet) {
                if (!TextUtils.isEmpty(mDefaultAlarmAlertFilename)) {
                    if (doesPathHaveFilename(entry.mPath, mDefaultAlarmAlertFilename))
                        needToSetSettings = true;
                }
            }
...
//如果需要设置，则调用setRingtoneIfNotSet
if(needToSetSettings) {
                if (notifications) {
                    setRingtoneIfNotSet(Settings.System.NOTIFICATION_SOUND, tableUri, rowId);
                    mDefaultNotificationSet = true;
                } else if (ringtones) {
                    // memorize default system ringtone persistently
                    setRingtoneIfNotSet(Settings.System.DEFAULT_RINGTONE, tableUri, rowId);

                    setRingtoneIfNotSet(Settings.System.RINGTONE, tableUri, rowId);
                    if (TelephonyManager.getDefault().isMultiSimEnabled()) {
                        int phoneCount = TelephonyManager.getDefault().getPhoneCount();
                        for (int i = PhoneConstants.SUB2; i < phoneCount; i++) {
                            // Set the default setting to the given URI for multi SIMs
                            setRingtoneIfNotSet((Settings.System.RINGTONE + "_" + (i+1)), tableUri, rowId);
                        }
                    }
                    mDefaultRingtoneSet = true;
                } else if (alarms) {
                    setRingtoneIfNotSet(Settings.System.ALARM_ALERT, tableUri, rowId);
                    mDefaultAlarmSet = true;
                }
            }

private void setRingtoneIfNotSet(String settingName, Uri uri, long rowId) {
            if (wasRingtoneAlreadySet(settingName)) {
                return;
            }

            ContentResolver cr = mContext.getContentResolver();
            String existingSettingValue = Settings.System.getString(cr, settingName);
            if (TextUtils.isEmpty(existingSettingValue)) {
                final Uri settingUri = Settings.System.getUriFor(settingName);
                final Uri ringtoneUri = ContentUris.withAppendedId(uri, rowId);
                RingtoneManager.setActualDefaultRingtoneUri(mContext,
                        RingtoneManager.getDefaultType(settingUri), ringtoneUri);
            }
            Settings.System.putInt(cr, settingSetIndicatorName(settingName), 1);
        }

public static void setActualDefaultRingtoneUri(Context context, int type, Uri ringtoneUri) {                                   final ContentResolver resolver = context.getContentResolver();
        String setting = getSettingForType(type);
        if (setting == null) return;

        //将设置的内容写入Setting数据库
        //该数据库内容可以这么查询
        //adb shell settings get system [key](查询setting数据库底下的system表的【key】对应的value)

        Settings.System.putStringForUser(resolver, setting,
                ringtoneUri != null ? ringtoneUri.toString() : null, context.getUserId());

        // Stream selected ringtone into cache so it's available for playback
        // when CE storage is still locked
        if (ringtoneUri != null) {
            final Uri cacheUri = getCacheForType(type);
            if (cacheUri != null) {
                try (InputStream in = openRingtone(context, ringtoneUri);
                        OutputStream out = resolver.openOutputStream(cacheUri)) {
                        //将铃声写入data/system_de/ringtones目录下缓存
                    Streams.copy(in, out);
                } catch (IOException e) {
                    Log.w(TAG, "Failed to cache ringtone: " + e);
                }
            }
        }
    }

4.在设置中修改铃声设置

这个比较简单。用户修改之后，对Setting数据库就行写入就行。

5.来电话时

调用
RingtoneManager.getRingtone()
RingtoneManager.play();

6.小知识

(1)铃声文件的设置，播放等等一般用Uri传递，比如这样的：

content://media/external/file/84

== adb shell 进入/data/data/com.android.providers.media/databases ==

这个路径底下有个external.db
uri所对应的内容在这个db里就能查到。查询方法：

sqlite3 external.db//进入对应db.

select * from files where _id=84;

7.自定义铃声

将.ogg文件放到
android/frameworks/base/data/sounds/
目录
修改android/build/target/product/core_base.mk
PRODUCT_PROPERTY_OVERRIDES := \ ro.config.notification_sound=OnTheHunt.ogg \ ro.config.alarm_alert=Alarm_Classic.ogg //ro.config.alarm_alert=<需要修改的.ogg>
修改/frameworks/base/data/sounds/AllAudio.mk：

PRODUCT_COPY_FILES += \    $(LOCAL_PATH)/Alarm_Beep_01.ogg:system/media/audio/alarms/Alarm_Beep_01.ogg \
$(LOCAL_PATH)/Alarm_Beep_02.ogg:system/media/audio/alarms/Alarm_Beep_02.ogg $(LOCAL_PATH)/Alarm_Beep_03.ogg:system/media/audio/alarms/Alarm_Beep_03.ogg \
$(LOCAL_PATH)/Alarm_Buzzer.ogg:system/media/audio/alarms/Alarm_Buzzer.ogg \