如何从Android获取whatsapp联系人？

Question

我试图通过电话获得whatsapp联系,我得到whatsapp联系的总数,但是从RawContacts如何获得whatsapp我不知道的号码和名称.我试图找到解决方案,但无法得到确切的解决方案.请帮我.

我把我的代码放在下面.

ContentResolver cr = context.getContentResolver();

Cursor c = cr.query(
                        ContactsContract.RawContacts.CONTENT_URI,
                        new String[] { ContactsContract.RawContacts.CONTACT_ID, ContactsContract.RawContacts.DISPLAY_NAME_PRIMARY },
                        ContactsContract.RawContacts.ACCOUNT_TYPE + "= ?",
                        new String[] { "com.whatsapp" },
                        null);

                ArrayList<String> myWhatsappContacts = new ArrayList<>();

                String projection[] = { ContactsContract.CommonDataKinds.Phone.NUMBER };

                if(c != null) {
                    if (c.getCount() > 0) {
                        while (c.moveToNext()) {

                            String whatsappContactId = c.getString(c.getColumnIndex(ContactsContract.RawContacts.Data._ID));

                            Cursor dataCursor = cr.query(
                                    ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                                    projection,
                                    ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
                                    new String[]{whatsappContactId}, null);
                            // You can also read RawContacts.CONTACT_ID to read the
                            // ContactsContract.Contacts table or any of the other related ones.
                            String number = dataCursor.getString(dataCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NORMALIZED_NUMBER));
                            myWhatsappContacts.add(number);

                        }
                    }
                }

                showLogI(TAG, " WhatsApp contact size :  " + myWhatsappContacts.size());

Answer 1

我找到了我的问题的解决方案,所以我把答案放在这里..可能对其他人有用..

首先阅读并尝试了解Android联系人数据存储的图表,之后很容易理解整个联系人流程.在片段下面给出了三层数据模型图.

代码片段

//This class provides applications access to the content model.
ContentResolver cr = context.getContentResolver();

//RowContacts for filter Account Types
Cursor contactCursor = cr.query(
        ContactsContract.RawContacts.CONTENT_URI,
        new String[]{ContactsContract.RawContacts._ID,
                ContactsContract.RawContacts.CONTACT_ID},
        ContactsContract.RawContacts.ACCOUNT_TYPE + "= ?",
        new String[]{"com.whatsapp"},
        null);

//ArrayList for Store Whatsapp Contact
ArrayList<String> myWhatsappContacts = new ArrayList<>();

if (contactCursor != null) {
    if (contactCursor.getCount() > 0) {
        if (contactCursor.moveToFirst()) {
            do {
                //whatsappContactId for get Number,Name,Id ect... from  ContactsContract.CommonDataKinds.Phone
                String whatsappContactId = contactCursor.getString(contactCursor.getColumnIndex(ContactsContract.RawContacts.CONTACT_ID));

                if (whatsappContactId != null) {
                    //Get Data from ContactsContract.CommonDataKinds.Phone of Specific CONTACT_ID
                    Cursor whatsAppContactCursor = cr.query(
                            ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                            new String[]{ContactsContract.CommonDataKinds.Phone.CONTACT_ID,
                                    ContactsContract.CommonDataKinds.Phone.NUMBER,
                                    ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME},
                            ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
                            new String[]{whatsappContactId}, null);

                    if (whatsAppContactCursor != null) {
                        whatsAppContactCursor.moveToFirst();
                        String id = whatsAppContactCursor.getString(whatsAppContactCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID));
                        String name = whatsAppContactCursor.getString(whatsAppContactCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                        String number = whatsAppContactCursor.getString(whatsAppContactCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

                        whatsAppContactCursor.close();

                        //Add Number to ArrayList
                        myWhatsappContacts.add(number);

                        showLogI(TAG, " WhatsApp contact id  :  " + id);
                        showLogI(TAG, " WhatsApp contact name :  " + name);
                        showLogI(TAG, " WhatsApp contact number :  " + number);
                    }
                }
            } while (contactCursor.moveToNext());
            contactCursor.close();
        }
    }
}

showLogI(TAG, " WhatsApp contact size :  " + myWhatsappContacts.size());

这是演示Android Contact Data Store Diagram