小编ben*_*rtz的帖子

我需要通过REST API下载联系人数据,我以JSON格式获取.问题是,它可能是很多联系人,所以我想观察进度(已经下载了多少联系人)并向用户报告(带有进度条,下面的代码在一个线程中运行).

但是,似乎行client.execute(getRequest); 建立连接并一次性下载整个内容,即我的InputStream阅读器(以块为单位获取内容)似乎没用.现在我想知道如何让它在大块中工作,所以我可以报告进展情况？

/** prepare HTML get request */
HttpGet getRequest = new HttpGet(url[0]);
getRequest.addHeader("Authorization", "OAuth " + myTokens.get_access_token());

/** execute HTML request */
DefaultHttpClient client = new DefaultHttpClient();
JSONArray records = null;
HttpResponse response = client.execute(getRequest);

/** init response handlers for input stream */
InputStream input = new BufferedInputStream(response.getEntity().getContent());

byte data[] = new byte[MAX_BUFFER_SIZE];

long totalContactsCount = -1;
int readContactsCount = 0;
int currentByteReadCount = 0;

/** read response from inpus stream */
while ((currentByteReadCount = input.read(data)) != …

我正在为我的Android应用程序进行单元测试,并且正在使用Contacts进行大量工作.我必须将联系人插入Android内容提供商,并在运行我的测试后删除它们.麻烦的是,它们实际上没有被删除:

插入:

ArrayList<ContentProviderOperation> contactOps = new ArrayList<ContentProviderOperation>();

int backRefIndex = 0;

Random r = new Random();

    contactOps.add(ContentProviderOperation.newInsert(ContactsContract.RawContacts.CONTENT_URI)
                                           .withValue(ContactsContract.RawContacts.ACCOUNT_TYPE, null)
                                           .withValue(ContactsContract.RawContacts.ACCOUNT_NAME, null) 
                                           .build());      
    contactOps.add(ContentProviderOperation.newInsert(ContactsContract.Data.CONTENT_URI)
                                           .withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, backRefIndex)
                                           .withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE)
                                           .withValue(ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME, "Sample Name" + r.nextInt())
                                           .build());

    contactOps.add(ContentProviderOperation.newInsert(ContactsContract.Data.CONTENT_URI)
                       .withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, backRefIndex)
                       .withValue(ContactsContract.CommonDataKinds.Phone.MIMETYPE, ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE)
                       .withValue(ContactsContract.CommonDataKinds.Phone.NUMBER, "020" + r.nextInt())
                       .withValue(ContactsContract.CommonDataKinds.Phone.TYPE, r.nextInt(20)
                       .build());

    try {
        ContentProviderResult[] result = context.getContentResolver().applyBatch(ContactsContract.AUTHORITY, contactOps);
    } catch (Exception e) {
        e.printStackTrace();
    }

删除方法1(返回原始联系人的数量,但实际上不会被删除):

int deletedRawContacts = context.getContentResolver().delete(ContactsContract.RawContacts.CONTENT_URI, ContactsContract.RawContacts._ID + " >= ?", new String[]{"0"});

删除方法2(与删除方法1相同,但方法不同):

private static int deleteAllRawContacts(Context context) {
    ContentResolver cr …