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我發現下面的代碼來執行HTTP POST。它說我不直接在UI/Main Thread中運行這些代碼。創建一個AsyncTask並將代碼放在doInBackground方法中。如何使它在asynctask下運行。創建一個AsyncTask並將代碼放在doInBackground方法中
我發現下面的代碼來執行HTTP POST。它說我不直接在UI/Main Thread中運行這些代碼。創建一個AsyncTask並將代碼放在doInBackground方法中。如何使它在asynctask下運行。創建一個AsyncTask並將代碼放在doInBackground方法中
您可以嘗試像下面:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mail_activity);
mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
String dataUrl = "http://example.com";
String dataUrlParameters = "email="+"[email protected]"+"&name="+"priyabrat"+"&message="+"Message_here";
// Call background operation.
new NetworkOperation().execute(dataUrl, dataUrlParameters);
}
private class NetworkOperation extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
String result = doNetworkOperation(params[0], params[1]);
// more task if you have
return result;
}
@Override
protected void onPostExecute(String result) {
}
}
private String doNetworkOperation(String dataUrl, String dataUrlParameters) {
URL url;
HttpURLConnection connection = null;
String responseStr = "";
try {
// Create connection
url = new URL(dataUrl);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length","" + Integer.toString(dataUrlParameters.getBytes().length));
connection.setRequestProperty("Content-Language", "en-US");
connection.setUseCaches(false);
connection.setDoInput(true);
connection.setDoOutput(true);
// Send request
DataOutputStream wr = new DataOutputStream(
connection.getOutputStream());
wr.writeBytes(dataUrlParameters);
wr.flush();
wr.close();
// Get Response
InputStream is = connection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer response = new StringBuffer();
while ((line = rd.readLine()) != null) {
response.append(line);
response.append('\r');
}
rd.close();
responseStr = response.toString();
Log.d("Server response",responseStr);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();
}
}
return responseStr;
}
我編輯我的答案。請看它。 –