2011.07.07——— android QuickContactBadge

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本文详细介绍了Android QuickContactBadge的功能、实现原理以及在apidemo中的应用案例，包括如何获取联系人信息并关联到QuickContactBadge上。

011.07.07——— android QuickContactBadge

参考：[url]http://www.cnblogs.com/over140/archive/2010/09/28/1837287.html[/url]
[url]http://kevinlynx.iteye.com/blog/854279[/url]

[url=http://disanji.net/2011/04/24/android-adapter-comparison/]ResourceCursorAdapter[/url]

何为QuickContactBadge 如下图：
[img]http://images.cnblogs.com/cnblogs_com/over140/2010/9/2010-9-28_1.jpg[/img]

这个我主要是在apidemo中看到的代码如下：

package com.example.android.apis.app;

import com.example.android.apis.R;

import android.app.ListActivity;
import android.content.Context;
import android.database.CharArrayBuffer;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract.Contacts;
import android.view.View;
import android.view.ViewGroup;
import android.widget.QuickContactBadge;
import android.widget.ResourceCursorAdapter;
import android.widget.TextView;

public class QuickContactsDemo extends ListActivity {
    static final String[] CONTACTS_SUMMARY_PROJECTION = new String[] {
            Contacts._ID, // 0
            Contacts.DISPLAY_NAME, // 1
            Contacts.STARRED, // 2
            Contacts.TIMES_CONTACTED, // 3
            Contacts.CONTACT_PRESENCE, // 4
            Contacts.PHOTO_ID, // 5
            Contacts.LOOKUP_KEY, // 6
            Contacts.HAS_PHONE_NUMBER, // 7
    };

    static final int SUMMARY_ID_COLUMN_INDEX = 0;
    static final int SUMMARY_NAME_COLUMN_INDEX = 1;
    static final int SUMMARY_STARRED_COLUMN_INDEX = 2;
    static final int SUMMARY_TIMES_CONTACTED_COLUMN_INDEX = 3;
    static final int SUMMARY_PRESENCE_STATUS_COLUMN_INDEX = 4;
    static final int SUMMARY_PHOTO_ID_COLUMN_INDEX = 5;
    static final int SUMMARY_LOOKUP_KEY = 6;
    static final int SUMMARY_HAS_PHONE_COLUMN_INDEX = 7;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        String select = "((" + Contacts.DISPLAY_NAME + " NOTNULL) AND ("
                + Contacts.HAS_PHONE_NUMBER + "=1) AND ("
                + Contacts.DISPLAY_NAME + " != '' ))";
        Cursor c =
                getContentResolver().query(Contacts.CONTENT_URI, CONTACTS_SUMMARY_PROJECTION, select,
                null, Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC");
        startManagingCursor(c);
        ContactListItemAdapter adapter = new ContactListItemAdapter(this, R.layout.quick_contacts, c);
        setListAdapter(adapter);

    }

    private final class ContactListItemAdapter extends ResourceCursorAdapter {
        public ContactListItemAdapter(Context context, int layout, Cursor c) {
            super(context, layout, c);
        }

        @Override
        public void bindView(View view, Context context, Cursor cursor) {
            System.out.println("bind View");
            final ContactListItemCache cache = (ContactListItemCache) view.getTag();
            TextView nameView = cache.nameView;
            QuickContactBadge photoView = cache.photoView;
            // Set the name
            cursor.copyStringToBuffer(SUMMARY_NAME_COLUMN_INDEX, cache.nameBuffer);
            int size = cache.nameBuffer.sizeCopied;
            cache.nameView.setText(cache.nameBuffer.data, 0, size);
            final long contactId = cursor.getLong(SUMMARY_ID_COLUMN_INDEX);
            final String lookupKey = cursor.getString(SUMMARY_LOOKUP_KEY);
            cache.photoView.assignContactUri(Contacts.getLookupUri(contactId, lookupKey));
        }

        @Override
        public View newView(Context context, Cursor cursor, ViewGroup parent) {
            System.out.println("new View");
            View view = super.newView(context, cursor, parent);
            ContactListItemCache cache = new ContactListItemCache();
            cache.nameView = (TextView) view.findViewById(R.id.name);
            cache.photoView = (QuickContactBadge) view.findViewById(R.id.badge);
            view.setTag(cache);

            return view;
        }
    }

    final static class ContactListItemCache {
        public TextView nameView;
        public QuickContactBadge photoView;
        public CharArrayBuffer nameBuffer = new CharArrayBuffer(128);
    }
}

代码里最重要的是给这个view关联一个联系人的uri

cache.photoView.assignContactUri(Contacts.getLookupUri(contactId, lookupKey));