使用android实战读取手机通讯录

要读取Android手机的通讯录，可以使用Android提供的ContentResolver类和ContactsContract类。下面是一个简单的示例代码：

import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.provider.ContactsContract;

public class ContactReader {

    public static void readContacts(Context context) {
        ContentResolver contentResolver = context.getContentResolver();
        Cursor cursor = null;

        try {
            cursor = contentResolver.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);

            if (cursor != null && cursor.getCount() > 0) {
                while (cursor.moveToNext()) {
                    String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
                    String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));

                    Cursor phoneCursor = contentResolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,
                            ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?", new String[] { id }, null);

                    if (phoneCursor != null && phoneCursor.moveToNext()) {
                        String phoneNumber = phoneCursor.getString(phoneCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                        System.out.println("Name: " + name + ", Phone Number: " + phoneNumber);
                    }

                    if (phoneCursor != null) {
                        phoneCursor.close();
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (cursor != null) {
                cursor.close();
            }
        }
    }
}

在上面的代码中，我们首先获取ContentResolver对象，然后使用它查询ContactsContract.Contacts.CONTENT_URI来获取所有联系人的ID和名称。接着，我们使用联系人ID查询ContactsContract.CommonDataKinds.Phone.CONTENT_URI来获取联系人的电话号码。最后，我们打印联系人的名称和电话号码。调用readContacts()方法即可读取手机通讯录。