添加行插入光标手动 [英] Adding rows into Cursor manually

问题描述

我的电话号码数组，我想从联系人数据库中获取相应的联系人姓名。

I have an array of phone numbers and I want to get the corresponding contact names from the contacts database.

在电话号码数组，我也有未保存之前的联系人数据库的一些数字。例如;

In the array of phone numbers, I also have some numbers that are not saved before to the contact database. For example;

• 3333333 - >添
• 5555555 - >吉姆
• 1111111 - >未知

我上面显示包含电话号码的阵列，即的 phoneArr 的。

I have the array containing the phone numbers shown above, namely phoneArr.

int size=phoneArr.size();
if(size>0){
        Cursor[] cursors=new Cursor[size];
        for(int i=0;i<size;i++){
            Uri contactUri1 = Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI, Uri.encode(phoneArr.get(i)));
            cursors[i] = getContentResolver().query(contactUri1, PEOPLE_PROJECTION, null, null, " _id asc limit 1");
        }
        Cursor phones=new MergeCursor(cursors);

phones.getCount（）在上述情况下返回2。当电话号码没有出现在联系人列表中的光标变成空的，不知怎的，当我把它们合并不利于在所有的事情。我要的是有一个光标如下：

phones.getCount() returns 2 in the above scenario. When the phone number does not appear in the contact list the cursor becomes empty and somehow when I merge them it doesn't contribute anything at all. What I want is to have a cursor as follows

光标手机 - > {添，吉姆，1111111}

我想我可以通过手动添加一行如下做到这一点：

I think I can do this by adding the row manually as follows:

Uri contactUri1 = Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI, Uri.encode(phoneArr.get(i)));
cursors[i] = getContentResolver().query(contactUri1, PEOPLE_PROJECTION, null, null, " _id asc limit 1");
if(cursors[i].getCount()==0)
    // add the phone number manually to the cursor

我怎样才能做到这一点？

How can I achieve this?

下面是PEOPLE_PROJECTION

Here is the PEOPLE_PROJECTION

private static final String[] PEOPLE_PROJECTION = new String[] {
    ContactsContract.PhoneLookup._ID,
    ContactsContract.PhoneLookup.DISPLAY_NAME,
    ContactsContract.PhoneLookup.NUMBER
};

推荐答案

最容易在游标行添加的方法是使用一个 MatrixCursor 和 MergeCursor 。 这两个类是从SDK和这里解决那样的问题。

Easiest way to add rows in a cursor is to use a MatrixCursor and a MergeCursor. Those two classes are from the SDK and here to solve that kind of problems.

基本上，你做的是：

1. 将要在 MatrixCusror
添加行
2. 合并你的光标和您的 matrixCursor 使用 MergeCursor

1. Put the rows you want to add in a MatrixCusror
2. Merge your cursor and your matrixCursor using a MergeCursor

是这样的：

// Create a MatrixCursor filled with the rows you want to add.
MatrixCursor matrixCursor = new MatrixCursor(new String[] { colName1, colName2 });
matrixCursor.addRow(new Object[] { value1, value2 });

// Merge your existing cursor with the matrixCursor you created.
MergeCursor mergeCursor = new MergeCursor(new Cursor[] { matrixCursor, cursor });

// Use your the mergeCursor as you would use your cursor.

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