以编程方式从Android中删除联系人照片

Question

我想通过代码删除联系人图片，我尝试将 Photo.PHOTO 设置为 null。然而，这个语句会抛出异常。以下是代码：

ContentValues values = new ContentValues();
int             result = 0;

values.put(Data.RAW_CONTACT_ID, contactId);
values.put(Data.MIMETYPE, Photo.CONTENT_ITEM_TYPE);
values.put(Photo.PHOTO, (byte[])null);

result = getContext().getContentResolver().update(Data.CONTENT_URI, values, Data.RAW_CONTACT_ID + "=?", new String[]{String.valueOf(contactId)});

以下是异常信息：

android.database.sqlite.SQLiteException: 未知错误 (code 0): 无法将 BLOB 转换为字符串 at android.database.CursorWindow.nativeGetString(Native Method) at android.database.CursorWindow.getString(CursorWindow.java:434) at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51) at com.android.providers.contacts.DataRowHandler.getAugmentedValues(DataRowHandler.java:332) at com.android.providers.contacts.DataRowHandlerForStructuredName.update(DataRowHandlerForStructuredName.java:70) at com.android.providers.contacts.ContactsProvider2.updateData(ContactsProvider2.java:4507) at com.android.providers.contacts.ContactsProvider2.updateData(ContactsProvider2.java:4490) at com.android.providers.contacts.ContactsProvider2.updateInTransaction(ContactsProvider2.java:3875) at com.android.providers.contacts.AbstractContactsProvider.update(AbstractContactsProvider.java:143) at com.android.providers.contacts.ContactsProvider2.update(ContactsProvider2.java:2061) at android.content.ContentProvider$Transport.update(ContentProvider.java:235) at android.content.ContentResolver.update(ContentResolver.java:990)

- user1920320

Answer 1

以下是如何删除照片的步骤（基于此帖子）：

ContentProviderOperation.Builder builder = ContentProviderOperation.newUpdate(ContactsContract.Data.CONTENT_URI);

builder.withSelection(ContactsContract.Data.CONTACT_ID + "=?" + " AND " + ContactsContract.Data.MIMETYPE + "=?",
        new String[] { ContactsContract.CommonDataKinds.Photo.CONTENT_ITEM_TYPE });
builder.withValue(Integer.toString(id),ContactsContract.CommonDataKinds.Photo.PHOTO, (byte[0])null);

final ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>();
ops.add(builder.build());
getContentResolver().applyBatch(ContactsContract.AUTHORITY, ops);

- android developer