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마침내 mySQL과 내 안드로이드 앱 간의 연결을 관리합니다. 문제는 예기치 않게 멈추어 앱을 방해하기 위해 네트워크 연결이 끊어지면 토스트를 만들 수 없다는 것입니다. 어떻게 구현할 수있는 아이디어가 있습니까?데이터베이스 연결이 끊어져 예기치 않게 중지되었습니다.
코드 :
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_layout_one, container, false);
listView = (ListView) view.findViewById(R.id.listView1);
accessWebService();
return view;
}
// Async Task to access the web
public class JsonReadTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(params[0]);
try {
HttpResponse response = httpclient.execute(httppost);
jsonResult = inputStreamToString(
response.getEntity().getContent()).toString();
}
catch (ClientProtocolException e) {
//e.printStackTrace();
Toast.makeText(getActivity(), "this is my Toast message!!! =)",
Toast.LENGTH_LONG).show();
} catch (IOException e) {
//e.printStackTrace();
Toast.makeText(getActivity(), "this is my Toast message!!! =)",
Toast.LENGTH_LONG).show();
}
catch (Exception e){
//Log.e("log_tag", "Error in http connection"+e.toString());
Toast.makeText(getActivity(), "this is my Toast message!!! =)",
Toast.LENGTH_LONG).show();
}
return null;
}
private StringBuilder inputStreamToString(InputStream is) {
String rLine = "";
StringBuilder answer = new StringBuilder();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
try {
while ((rLine = rd.readLine()) != null) {
answer.append(rLine);
}
}
catch (IOException e) {
//e.printStackTrace();
Toast.makeText(getActivity(),
"Error..." + e.toString(), Toast.LENGTH_LONG).show();
}
return answer;
}
@Override
protected void onPostExecute(String result) {
ListDrwaer();
}
}// end async task
public void accessWebService() {
try{
JsonReadTask task = new JsonReadTask();
// passes values for the urls string array
task.execute(new String[] { url });
}
catch (Exception e){
Toast.makeText(getActivity(), "this is my Toast message!!! =)",
Toast.LENGTH_LONG).show();
}
}