Question

我正在开发类似Android Auto的应用，我希望使用recyclerview和卡片显示通话记录。

这很好用，但是通话记录显示所有日志。让我们说，如果我收到彼得的3个电话，我不想看到有3个条目显示这个，只有一个条目。这就像做＆＃34;最近的联系人＆＃34;或类似的东西。

使用recyclerview和卡时，我已创建了3个类来保存联系人信息：自定义适配器，联系信息和自定义视图持有者。

这是ContactInfo类：

public class ContactInfo {

    public int id;
    public String name;
    public String type;

    public static final String ID_PREFIX = "ID_";
    public static final String NAME_PREFIX = "Name_";
    public static final String TYPE_PREFIX = "Type_";
}

然后，在我显示调用日志的片段中，这就是我显示日志的方法：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.phone_layout, container, false);
    ...
    ContactAdapter contactAdapter = new ContactAdapter(DisplayCallLog());        
    ...
    return view;
}


private ArrayList<ContactInfo> DisplayCallLog() {

    ArrayList<ContactInfo> data = new ArrayList<ContactInfo>();
    int contactID = 0;
    String contactNumber = null;
    int logType = 0;
    String contactName = null;
    String contactType = null;
    ContactInfo cI;
    int resultLimit = 0;

    //Check access to Call Log
    if (ActivityCompat.checkSelfPermission(this.getActivity(), Manifest.permission.READ_CALL_LOG) == PackageManager.PERMISSION_GRANTED) {

        //Get phone numbers from call log
        Cursor cursorCallLog = getActivity().getContentResolver().query(CallLog.Calls.CONTENT_URI,
                null, null, null, CallLog.Calls.DATE + " DESC");
        while (cursorCallLog.moveToNext() && resultLimit<6) {
            contactNumber = cursorCallLog.getString(cursorCallLog.getColumnIndex(CallLog.Calls.NUMBER));
            //We also get the call type: Incoming, Outgoing, missed
            logType = cursorCallLog.getInt(cursorCallLog.getColumnIndex(CallLog.Calls.TYPE));
            resultLimit++;

            //With the phone number we search the ID
            String number = Uri.encode(contactNumber);
            Cursor cursorContactLookup = getActivity().getContentResolver().query(
                    Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI,
                            number),
                    new String[]{ContactsContract.PhoneLookup.DISPLAY_NAME, ContactsContract.PhoneLookup._ID},
                    null, null, null);
            while (cursorContactLookup.moveToNext()) {
                contactID = cursorContactLookup
                        .getInt(cursorContactLookup
                                .getColumnIndexOrThrow(ContactsContract.PhoneLookup._ID));

                //Get the contact name and phone type
                Cursor cursorContactDetails = getActivity().getContentResolver().query(
                        ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                                new String[] {
                                        ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
                                        ContactsContract.CommonDataKinds.Phone.TYPE,
                                },
                                ContactsContract.Data.CONTACT_ID + "=?",
                                new String[] {String.valueOf(contactID)}, null);
                while (cursorContactDetails.moveToNext()) {
                    contactName = cursorContactDetails
                            .getString(cursorContactDetails
                                    .getColumnIndexOrThrow(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                    int type = cursorContactDetails
                            .getInt(cursorContactDetails
                                    .getColumnIndexOrThrow(ContactsContract.CommonDataKinds.Phone.TYPE));
                    switch (type) {
                        case ContactsContract.CommonDataKinds.Phone.TYPE_HOME:
                            contactType = "Home";
                            break;
                        case ContactsContract.CommonDataKinds.Phone.TYPE_WORK:
                            contactType = "Work";
                            break;
                        case ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE:
                            contactType = "Mobile";
                            break;
                        case ContactsContract.CommonDataKinds.Phone.TYPE_OTHER:
                            contactType = "Other";
                            break;
                    }

                    //Call contactinfo class and save into list
                    cI = new ContactInfo();
                    cI.id = contactID;
                    cI.name = contactName;
                    cI.type = contactType;
                    //cI.logType = logType;

                    //HERE: CHECK IF LIST DOES NOT CONTAIN CURRENT CONTACT
                    if (!data.contains(cI)) {
                        data.add(cI);
                    }
                }
                cursorContactDetails.close();
            }
            cursorContactLookup.close();
        }
        cursorCallLog.close();
    }
    return data;
}

我遇到的问题是cI显示的字符串如下：

I/CONTACT_INFO: com.example_infodash.phone.ContactInfo@41c9e198

即使保存的联系人是相同的，最后的数字总是不同的。所以它永远不会在列表中找到相同的联系人，即使是重复的。

所以我的问题是，如何检查保存的联系人是否已经在列表中？我想在这种情况下的麻烦是因为使用了像ContactInfo这样的自定义类。

Answer 1

我遇到的问题是cI显示如下字符串：

I / CONTACT_INFO：com.example_infodash.phone.ContactInfo@41c9e198

此问题的解决方案：覆盖patients = Demographic.objects.filter(author__institution__department=department)

中的toString方法

ContactInfo

对于ArrayList“包含”问题，您必须覆盖public class ContactInfo { public int id; public String name; public String type; public static final String ID_PREFIX = "ID_"; public static final String NAME_PREFIX = "Name_"; public static final String TYPE_PREFIX = "Type_"; @Override public String toString() { return "{name: " + name + ", type: " + type + "}"; } }中的equals()。像这样：

ContactInfo

如果您在Android Studio中，则可以自动创建它。转到ContactInfo类，右键单击它，选择：

public class ContactModel {

    public String name;
    public String phone;

    public ContactModel(String name, String phone) {
        this.name = name;
        this.phone = phone;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        ContactModel that = (ContactModel) o;

        if (name != null ? !name.equals(that.name) : that.name != null) return false;
            return phone != null ? phone.equals(that.phone) : that.phone == null;
    }

}

你的equals（）方法：

Generate... -> equals() and hashCode()

在“呼叫记录”上跳过重复的条目

1 个答案: