文章目录
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- Ringtone 的两中类型三种形式
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- 两种类型
- 三种形式
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- 1 最常见的uri形式
- 2 Settings数据库中的uri形式
- 3 Android 4.4以后增加了document uri
- 返回给RingtonePickerActivity的uri处理
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- authority是settings
- authority是com.android.providers…
- RingtonePickerActivity的默认铃声
- RingtonePickerActivity的初始铃声列表
Ringtone 的两中类型三种形式
两种类型
指的是:external.db和internal.db中对应的MediaStore.Audio.Media.EXTERNAL_CONTENT_URI和MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
三种形式
1 最常见的uri形式
content://media/external/audio/media/id 和 content://media/internal/audio/media/id
id就是其在MediaProvider中对应的数据库中的id
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI---content://media/external/audio/media/id
对应的数据库:/data/data/com.android.providers.media/databases/external.db
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI---content://media/internal/audio/media/id
对应的数据库:/data/data/com.android.providers.media/databases/internal.db
authority是media
2 Settings数据库中的uri形式
content://setting/system/***
Settings.System.DEFAULT_NOTIFICATION_URI----content://setting/system/notification_sound
Settings.System.DEFAULT_RINGTONE_URI------content://settings/system/ringtone
Settings.System.DEFAULT_ALARM_ALERT_URI-----content://settings/system/alarm_alert
authority是settings
android M以前对应的数据库data\data\com.android.providers.settings\databases\这个目录下的Settings.db (如android L)
android M SettingsProvider数据库的变化,变化如下,之前系统修改的数据最后是存储在data/data/com.android.providers.settings/databases目录下,现在该目录下存放了一个backup数据库,里面的数据不是当前系统设置的全部数据,只有一部分内容,另一个是journal数据库,无数据。现在的数据库真正的数据存储目录在data/system/users/userId(我们没开启多用户,userid为0),数据存储形式不是以db的形式,如下截图,为数据三个表分别对应system,secure和global,查看相应数据可以导出对应的xml。
settings_system.xml中存储的就有content://setting/system/..,存储的value是第一种形式,所以其本质是把第一种数据uri形式存储在settings_system.xml中。
settings_system.xml 所有的偏好设置对系统的所有用户公开,第三方APP有读没有写的权限;
settings_global.xml 包含各种各样的用户偏好系统设置;
settings_secure.xml 安全性的用户偏好系统设置,第三方APP有读没有写的权限
这里可以直接adb修改配置值,方便开发人员测试:
adb shell settings put system xxxx 1
adb shell settings get system xxx
adb shell settings put global xxx 0
3 Android 4.4以后增加了document uri
content://com.android.providers.media.documents/document/audio%3A82482
content://com.android.providers.downloads.documents/document/audio%3A82556
content://com.android.externalstorage.documents//document/audio%8N584645
authority是com.android.providers.*.documents
其DocumentsContract.getDocumentId(uri)进行String串的处理获取id转化为第一种形式,本质上是对第一种形式的包装
if (isMediaDocument(uri)) {final String docId = DocumentsContract.getDocumentId(uri);final String[] split = docId.split(":");final String id = split[1];Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://media/external/audio/media/"), Long.valueOf(id));return contentUri;...
不管那种类型或形式都是下面这种格式:
content://authority/path/id
返回给RingtonePickerActivity的uri处理
返回给RingtonePickerActivity的uri如果不是第三中形式需要对uri处理转化为第一种形式
authority是settings
通过访问settings_system.xml获取对应的value,也就是存储的第一种形式的content uri的String形式
String uriString = Settings.System.getString(context.getContentResolver(), Settings.System.RINGTONE.toString());
authority是com.android.providers…
返回给RingtonePickerActivity的uri如果不是第三中形式需要对uri处理转化为第一种形式 authority是com.android.providers…
这种有三种,需要分别处理如下:
/*** Gets the content:// URI from the given corresponding path to a file** @param context* @param path* @return content Uri*/private static Uri getContentUriWithPath(ContentResolver resolver, String path) {Cursor cursor = null;String filePath = path;try {cursor = resolver.query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,new String[] { MediaStore.Audio.Media._ID },MediaStore.Audio.Media.DATA + "=? ",new String[] { filePath }, null);if (cursor != null && cursor.moveToFirst()) {int id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID));Uri baseUri = Uri.parse("content://media/external/audio/media");return Uri.withAppendedPath(baseUri, "" + id);} else {if (filePath != null) {ContentValues values = new ContentValues();values.put(MediaStore.Audio.Media.DATA, filePath);return resolver.insert(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, values);} else {return null;}}}finally {if (cursor != null)cursor.close();}}public static String getDataColumn(ContentResolver resolver, Uri uri, String selection,String[] selectionArgs) {Cursor cursor = null;final String column = "_data";final String[] projection = { column };try {cursor = resolver.query(uri, projection, selection, selectionArgs,null);if (cursor != null && cursor.moveToFirst()) {final int index = cursor.getColumnIndexOrThrow(column);//Log.d(TAG, "cursor.getString(index) = " + cursor.getString(index));return cursor.getString(index);}} finally {if (cursor != null)cursor.close();}return null;}private Uri getContentUri(ContentResolver resolver, Uri uri){if (DocumentsContract.isDocumentUri(this, uri)) {if (isMediaDocument(uri)) {final String docId = DocumentsContract.getDocumentId(uri);final String[] split = docId.split(":");final String id = split[1];Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://media/external/audio/media/"), Long.valueOf(id));return contentUri;}else if (isExternalStorageDocument(uri)){//Log.d(TAG, "****ExternalStorageDocument****");final String docId = DocumentsContract.getDocumentId(uri);//Log.d(TAG, "getContentUri: docId = " + docId);final String[] split = docId.split(":");final String type = split[0];String path = null;if ("primary".equalsIgnoreCase(type)) {path = Environment.getExternalStorageDirectory() + "/" + split[1];//Log.d(TAG, "getContentUri: primary path = " + path);}else{path = "/storage/" + split[0] + "/" + split[1];//Log.d(TAG, "getContentUri: path = " + path);}return getContentUriWithPath(resolver,path);}else if (isDownloadsDocument(uri)){Log.d(TAG, "****DownloadsDocument****");final String id = DocumentsContract.getDocumentId(uri);//Log.d(TAG, "getContentUri ,getDocumentId: Id = " + id);final Uri downloadsUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));//Log.d(TAG, "downloadsUri:" + downloadsUri.toString());String path = getDataColumn(resolver, downloadsUri, null, null);return getContentUriWithPath(resolver,path);}}return uri;}/*** @param uri The Uri to check.* @return Whether the Uri authority is ExternalStorageProvider.*/public static boolean isExternalStorageDocument(Uri uri) {return "com.android.externalstorage.documents".equals(uri.getAuthority());}/*** @param uri The Uri to check.* @return Whether the Uri authority is DownloadsProvider.*/public static boolean isDownloadsDocument(Uri uri) {return "com.android.providers.downloads.documents".equals(uri.getAuthority());}/*** @param uri The Uri to check.* @return Whether the Uri authority is MediaProvider.*/public static boolean isMediaDocument(Uri uri) {return "com.android.providers.media.documents".equals(uri.getAuthority());}
RingtonePickerActivity的默认铃声
/platform/build / target/product/full_base.mk
PRODUCT_PROPERTY_OVERRIDES := \ro.config.ringtone=Ring_Synth_04.ogg \ro.config.notification_sound=pixiedust.ogg......
RingtonePickerActivity的初始铃声列表
/platform/build / target/product/full_base.mk中会copy一部分internal ringtone
$(call inherit-product-if-exists, frameworks/base/data/sounds/AllAudio.mk)
AllAudio.mk会把audio资源copy到系统Ringtones、Notifications、Alarms目录下,也可在vendor下定制自己的铃声列表和默认铃声
在MediaScanner扫描文件时,判断到如果文件的路径含有Ringtones,则认为它是铃声,并将其在database的is_ringtone这个属性的栏位置为1,RingtonePickerActivity的初始铃声列表就是这些is_ringtone属性为1的资源
铃声列表查询铃声时,使用的过滤条件就是is_ringtone 为1的铃声,所以会将所有is_ringtone 为1的铃声过滤出来,Hangouts Call /Hangouts Message在应用的Ringtones目录中且is_ringtone 属性为1,也会在“铃声列表“中被过滤出来因此Hangouts Call.ogg /Hangouts Message.ogg会出现在ringtones中,出现在Notification中是同样的原因。
可以去除Hangouts Call /Hangouts Message显示在初始铃声列表:
frameworks / base/media/java/android/media/MediaScanner.java
//ADD BEGIN
private static final String SYS_RINGTONES_DIR = "system/media/audio/ringtones/";
private static final String SYS_NOTIFICATIONS_DIR = "system/media/audio/notifications/";
//ADD END
......
public Uri doScanFile(String path, String mimeType, long lastModified,long fileSize, boolean isDirectory, boolean scanAlways, boolean noMedia) {Uri result = null;try {...if (entry != null && (entry.mLastModifiedChanged || scanAlways)) {if (noMedia) {result = endFile(entry, false, false, false, false, false);} else {String lowpath = path.toLowerCase(Locale.ROOT);//MOD BEGINboolean ringtones = (lowpath.indexOf(SYS_RINGTONES_DIR) > 0);boolean notifications = (lowpath.indexOf(SYS_NOTIFICATIONS_DIR) > 0);//MOD ENDboolean alarms = (lowpath.indexOf(ALARMS_DIR) > 0);boolean podcasts = (lowpath.indexOf(PODCAST_DIR) > 0);boolean music = (lowpath.indexOf(MUSIC_DIR) > 0) ||(!ringtones && !notifications && !alarms && !podcasts);......