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[英]Java - Do java have something like C#'s struct automatic constructor
[英]do android volley have callback do something like java finally?
請求完成后,我必須做些事情。 像關閉加載對話框
我必須添加dialog.dismiss();
在對onResponse()和onErrorResponse()的每個請求中。
齊射有全局回調嗎? 我想在同一片段/活動中使用全局回調來處理錯誤/成功消息
JsonRequest jsonRequest = new JsonRequest
(url, params, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
dialog.dismiss();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
dialog.dismiss();
}
}) {
};
是的,您可以通過創建自定義截擊請求來做到這一點。 請參閱以下代碼:
import java.io.UnsupportedEncodingException;
import java.util.Map;
import org.json.JSONException;
import org.json.JSONObject;
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.toolbox.HttpHeaderParser;
import android.app.AlertDialog;
public class CustomRequest extends Request<JSONObject> {
private Listener<JSONObject> listener;
private Map<String, String> params;
private AlertDialog dialog;
//You can replace AlertDialog by the Type of dialog you use
public CustomRequest(String url, Map<String, String> params,
Listener<JSONObject> reponseListener, ErrorListener errorListener,AlertDialog dialog)
{
super(Method.GET, url, errorListener);
this.listener = reponseListener;
this.params = params;
this.dialog =dialog;
}
public CustomRequest(int method, String url, Map<String, String> params,
Listener<JSONObject> reponseListener, ErrorListener errorListener) {
super(method, url, errorListener);
this.listener = reponseListener;
this.params = params;
}
protected Map<String, String> getParams()
throws com.android.volley.AuthFailureError {
return params;
};
@Override
protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
try {
//Here you can call dialog.dismiss();
dialog.dismiss();
String jsonString = new String(response.data,
HttpHeaderParser.parseCharset(response.headers));
return Response.success(new JSONObject(jsonString),
HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JSONException je) {
return Response.error(new ParseError(je));
}
}
@Override
protected void deliverResponse(JSONObject response) {
// TODO Auto-generated method stub
listener.onResponse(response);
}
}
}
讓我知道這個是否奏效。 :)
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