[DESCRIPTION]
1.设置--声音--手机铃声--添加铃声--自定义铃声--选择音乐文件为铃声
2.设置--声音--手机铃声--添加铃声--自定义铃声--进入Files音频--查看Ringtones列表，删除刚才设置的铃声
或者进入File Manager--Internal shared storage--Ringtones，删除刚才设置的铃声
[SOLUTION]
出现之前现象的原因是铃声不存在，加载的是apk的资源。如下修改可以将来电改成无声音，贵司也可以重新设置某个铃声，改成某个固定的铃声。
RingtoneManager.java
//add begin
public static boolean isRingtoneExist(Context context, Uri uri) {
if (uri == null) {
Log.e(TAG, "Check ringtone exist with null uri!");
return false;
}
boolean exist = false;
try {
AssetFileDescriptor fd = context.getContentResolver().openAssetFileDescriptor(uri, "r");
if (fd == null) {
exist = false;
} else {
fd.close();
exist = true;
}
} catch (FileNotFoundException e) {
e.printStackTrace();
exist = false;
} catch (IOException e) {
e.printStackTrace();
exist = true;
}
Log.d(TAG, uri + " is exist " + exist);
return exist;
}
}
//add end
/vendor/mediatek/proprietary/packages/services/Telecomm/src/com/android/server/telecom/RingtoneFactory.java
55 public Ringtone getRingtone(Call incomingCall) {
56 // Use the default ringtone of the work profile if the contact is a work profile contact.
57 Context userContext = isWorkContact(incomingCall) ?
58 getWorkProfileContextForUser(mCallsManager.getCurrentUserHandle()) :
59 getContextForUserHandle(mCallsManager.getCurrentUserHandle());
60 Uri ringtoneUri = incomingCall.getRingtone();
61 Ringtone ringtone = null;
62
63 if(ringtoneUri != null && userContext != null) {
64// Ringtone URI is explicitly specified. First, try to create a Ringtone with that.
65ringtone = RingtoneManager.getRingtone(userContext, ringtoneUri);
66 }
67 if(ringtone == null) {
68// Contact didn't specify ringtone or custom Ringtone creation failed. Get default
69// ringtone for user or profile.
70Context contextToUse = hasDefaultRingtoneForUser(userContext) ? userContext : mContext;
71Uri defaultRingtoneUri;
72if (UserManager.get(contextToUse).isUserUnlocked(contextToUse.getUserId())) {
73 defaultRingtoneUri = RingtoneManager.getActualDefaultRingtoneUri(contextToUse,
74 RingtoneManager.TYPE_RINGTONE);
75} else {
76 defaultRingtoneUri = Settings.System.DEFAULT_RINGTONE_URI;
77}
//add begin
if(!RingtoneManager.isRingtoneExist(contextToUse,defaultRingtoneUri)){
RingtoneManager.setActualDefaultRingtoneUri(context,AudioManager.STREAM_RING,null);//可以设置希望的铃声
defaultRingtoneUri=null;
}
//add end
78if (defaultRingtoneUri == null) {
79 return null;
80}
81ringtone = RingtoneManager.getRingtone(contextToUse, defaultRingtoneUri);
82 }
83 if (ringtone != null) {
84ringtone.setStreamType(AudioManager.STREAM_RING);
85 }
