我正在開(kāi)發(fā)的我的Android應(yīng)用程序需要每5秒在我的服務(wù)器上請(qǐng)求一個(gè)頁(yè)面,但我擔(dān)心這將是一個(gè)大電池消費(fèi)者,有沒(méi)有更簡(jiǎn)單的方法？我目前的方法是每5秒循環(huán)一次的服務(wù)：

protected void onHandleIntent(Intent intent) {

while (true){

long endTime = System.currentTimeMillis() + 5*1000;

while (System.currentTimeMillis() < endTime) {

synchronized (this) {

try {

wait(endTime - System.currentTimeMillis());

HttpClient httpclient = new DefaultHttpClient();

HttpPost httppost = new HttpPost("http://www.***.***/***/request_sms.php");

String HTML = "";

try {

List nameValuePairs = new ArrayList(2);

nameValuePairs.add(new BasicNameValuePair("id", "1"));

httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

HttpResponse response = httpclient.execute(httppost);

HTML = EntityUtils.toString(response.getEntity());

} catch (ClientProtocolException e) {} catch (IOException e) {}

if(HTML.indexOf("[NO TEXTS]") > 0) {

} else {

Vector all_sms = getBetweenAll(HTML, "", "");

for(int i = 0, size = all_sms.size(); i < size; i++) {

String from = getBetween(all_sms.get(i), "", "");

String to = getBetween(all_sms.get(i), "", "");

String msg = getBetween(all_sms.get(i), "", "");

String sent = getBetween(all_sms.get(i), "", "");

String HTML1 = "";

HttpClient httpclient1 = new DefaultHttpClient();

HttpPost httppost1 = new HttpPost("http://www.***.***/***/add_sms.php");

try {

List nameValuePairs = new ArrayList(2);

nameValuePairs.add(new BasicNameValuePair("from", from));

nameValuePairs.add(new BasicNameValuePair("to", to));

nameValuePairs.add(new BasicNameValuePair("msg", msg));

nameValuePairs.add(new BasicNameValuePair("sent", sent));

httppost1.setEntity(new UrlEncodedFormEntity(nameValuePairs));

HttpResponse response1 = httpclient1.execute(httppost1);

HTML1 = EntityUtils.toString(response1.getEntity());

HN.post(new DisplayToast(HTML1));

} catch (ClientProtocolException e) {} catch (IOException e) {}

}

}

} catch (Exception e) {

}

}

}

}

}

解決方法:

基本上,您在服務(wù)器上注冊(cè)用戶設(shè)備,并且可以設(shè)置服務(wù)器以將通知推送到用戶設(shè)備.然后,您可以將客戶端更改為僅在服務(wù)器通知存在新數(shù)據(jù)時(shí)發(fā)出請(qǐng)求.

這應(yīng)該很好,因?yàn)槟鷰缀醪恍枰?jīng)常提出請(qǐng)求.你一定會(huì)以這種方式節(jié)省電池壽命.

標(biāo)簽：android,request,http,sync,httpclient

來(lái)源： https://codeday.me/bug/20190903/1795612.html

總結(jié)

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