通过Android中的PHOTO_FILE_ID将联系人的图像更改为大照片 [英] Changing contact's image to a large photo via PHOTO_FILE_ID in Android

问题描述

这似乎适用于小图像:

ContentValues values = new ContentValues();

values.put(ContactsContract.Data.RAW_CONTACT_ID, id);
values.put(ContactsContract.Data.IS_SUPER_PRIMARY, 1);
values.put(ContactsContract.CommonDataKinds.Photo.PHOTO, photo);
values.put(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.Photo.CONTENT_ITEM_TYPE);
if (photoRow >= 0) {
    context.getContentResolver().update(ContactsContract.Data.CONTENT_URI, values, ContactsContract.Data._ID + " = " + photoRow, null);
} else {
    context.getContentResolver().insert(ContactsContract.Data.CONTENT_URI, values);
}

在文档中，我意识到对于大图像，我需要设置PHOTO_FILE_ID ，所以我可以替换:

From the docs I realise that for large images I need to set the PHOTO_FILE_ID, so I can replace:

ContactsContract.CommonDataKinds.Photo.PHOTO

具有:

ContactsContract.CommonDataKinds.Photo.PHOTO_FILE_ID

但是，我需要提供一个PHOTO_FILE_ID而不是原始数据.我的问题:

However, then I need to supply a PHOTO_FILE_ID rather than raw data. My question:

1. 如何保存照片(字节[])并获取PHOTO_FILE_ID?
2. 如果已经有照片(照片不是PHOTO_FILE_ID).我需要删除它才能看到大图像还是要优先处理大图像?如果没有，如何删除它?

推荐答案

您自己的答案会起作用，但是效率不高，因为需要将照片编码为SQL查询并通过Android IPC传输.这也使它受制于Android的IPC大小限制(1MB)(即，如果您的照片太大，则内容提供商操作将失败).

Your own answer will work, but it's not very efficient because the photo needs to be encoded into an SQL query and piped through Android IPC. That also makes it a subject to Android's IPC size limit of 1MB (i.e. if your photo is too large the content provider operation will fail).

设置(创建或覆盖)RawContact(原始)照片的最有效方法是使用

The most efficient way to set (create or override) a RawContact's (primary) photo is by using openAssetFileDescriptor and a ContactsContract.RawContacts.DisplayPhoto URI like so (example copied from Android docs):

public void writeDisplayPhoto(long rawContactId, byte[] photo) {
    Uri rawContactPhotoUri = Uri.withAppendedPath(
            ContentUris.withAppendedId(RawContacts.CONTENT_URI, rawContactId),
            RawContacts.DisplayPhoto.CONTENT_DIRECTORY);
    try {
        AssetFileDescriptor fd =
            getContentResolver().openAssetFileDescriptor(rawContactPhotoUri, "rw");
        OutputStream os = fd.createOutputStream();
        os.write(photo);
        os.close();
        fd.close();
    } catch (IOException e) {
        // Handle error cases.
    }
}

此方法的唯一缺点是，它总是创建/替换RawContact的主照片.如果RawContact还没有照片，它将添加一张照片.

The only drawback of this approach is that it always creates/replaces the primary photo of the RawContact. If the RawContact doesn't have a photo yet this will add one.

很遗憾，无法将openAssetFileDescriptor与PHOTO_FILE_ID结合使用，因此您无法使用此方法覆盖由其ID标识的特定照片.但是，在现实生活中，大多数联系人最多只能有一张照片，所以这并不是一个真正的限制.

Unfortunately there is no way to use openAssetFileDescriptor with a PHOTO_FILE_ID, so you can't override a specific photo identified by its ID using this method. However, in real life most contacts probably have at most one photo, so that's not a real limitation.

这将自动更新 Photo.PHOTO 列大照片的缩略图，然后指定PHOTO_FILE_ID.

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