Android Webview POST
I am trying to accomplish something quite simple, yet I have found no good documentation on this. I have a webView, and I need to load a page in it that requires POST data. Seems like a simple process, yet I cannot find 开发者_JS百科a way to display the result in a webView.
The process should be simple:
query(with POST data) -> webserver -> HTML response -> WebView.
I can submit data using a DefaultHttpClient, but this cannot be displayed in a WebView.
Any suggestions?
Much Thanks
Solution
private static final String URL_STRING = "http://www.yoursite.com/postreceiver";
public void postData() throws IOException, ClientProtocolException {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("foo", "12345"));
nameValuePairs.add(new BasicNameValuePair("bar", "23456"));
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(URL_STRING);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
String data = new BasicResponseHandler().handleResponse(response);
mWebView.loadData(data, "text/html", "utf-8");
}
Two ways to load post response in webview:
webview.loadData(): Like what you have posted in your solution. But "content loaded through this mechanism does not have the ability to load content from the network".webview.postUrl(): Use this if post response needs to load content from the network. (NOTE: only accessible from api-level 5, which means no android 1.6 or lower)
String postData = "username=my_username&password=my_password";
webview.postUrl(url,EncodingUtils.getBytes(postData, "BASE64"));
(source: http://www.anddev.org/other-coding-problems-f5/webview-posturl-postdata-t14239.html)
Try this:
private static final String URL_STRING = "http://www.yoursite.com/postreceiver";
public void postData() throws IOException, ClientProtocolException {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("foo", "12345"));
nameValuePairs.add(new BasicNameValuePair("bar", "23456"));
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(URL_STRING);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
}
I would recommend doing this as part of an AsyncTask and updating the WebView afterwards
I use webView.loadData() to do client post, and it will display content of url, my code :
public static void webview_ClientPost(WebView webView, String url, Collection< Map.Entry<String, String>> postData){
StringBuilder sb = new StringBuilder();
sb.append("<html><head></head>");
sb.append("<body onload='form1.submit()'>");
sb.append(String.format("<form id='form1' action='%s' method='%s'>", url, "post"));
for (Map.Entry<String, String> item : postData) {
sb.append(String.format("<input name='%s' type='hidden' value='%s' />", item.getKey(), item.getValue()));
}
sb.append("</form></body></html>");
webView.loadData(sb.toString(), "text/html", "UTF-8");
}
use function webview_ClientPost() :
Map<String, String> mapParams = new HashMap<String, String>();
mapParams.put("param1", "111");
mapParams.put("param2", "222");
Collection<Map.Entry<String, String>> postData = mapParams.entrySet();
webview_ClientPost(webView1, "http://www.yoursite.com/postreceiver", postData);
If you use a WebView from the start could it work?
A Webview with a html/js that does the POST, and naturally displays the result.
You can also pass post key:value pair in JSON format to web view.
String userName = "admin";
String password = "Admin@2021";
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("userName", userName);
jsonObject.put("password", password);
} catch (JSONException e) {
e.printStackTrace();
}
String url = "http://www.example.com";
webView.postUrl(url, jsonObject.toString().getBytes());
加载中,请稍侯......
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