错误：
错误：（164,40）错误：找不到合适的构造函数 JsonObjectRequest（int，String，＆gt;，）构造函数 JsonObjectRequest.JsonObjectRequest（字符串，JSONObject的，监听器，ErrorListener） 不适用（实际参数int不能转换为String 通过方法调用转换）构造函数 JsonObjectRequest.JsonObjectRequest（INT，字符串的JSONObject，监听器，ErrorListener） 不适用（实际和正式的参数列表长度不同）
我相信问题是在类makeJsonObjectRequest，有人可以帮帮我吗？
我的班级：
<!-- language: java -->
public class MainActivity extends ActionBarActivity {
public static String api_pvp_net = ".api.pvp.net/api/lol/"; // URL API
// Insira a Sua Key depois do sinal de igual exemplo = "?api_key=sua-key-da-riot"
public static String DEVELOPMENT_API_KEY = "?api_key=xxxxx-c258-48ab-9f52-af4f52b45e4c"; // Key Api RIOT
// ---------------------------------
public static String summoner_by_name = "v1.4/summoner/by-name/"; // Classe API URL
public static String aUrl; // Url
public static String Res_Web; // Resultado do WebBroser
public static String Nome_Invocador; // Pega o Nome do invocador Do Txt_INVOCADOR
private EditText etNick;
private String nick;
private Button btnOk;
private Spinner rg;
private invocador inv;
private TextView tvLevel;
private TextView Level;
private TextView Id;
private static String TAG = MainActivity.class.getSimpleName();
private String jsonResponse;
private ProgressDialog pDialog;
ArrayAdapter<String> adapter;
ArrayList<String> arrayInv;
Summoner summoner = new Summoner();
private void preencherInv() {
arrayInv.add("BR");
arrayInv.add("EUNE");
arrayInv.add("EUW");
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pDialog = new ProgressDialog(this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
etNick = (EditText) findViewById(R.id.etNick);
btnOk = (Button) findViewById(R.id.btnOk);
rg = (Spinner) findViewById(R.id.spRG);
tvLevel = (TextView) findViewById(R.id.tvLevel);
inv = new invocador();
Level = (TextView) findViewById(R.id.level);
Id = (TextView) findViewById(R.id.id);
arrayInv = new ArrayList<>();
preencherInv();
adapter = new ArrayAdapter<String>(
this,
android.R.layout.simple_dropdown_item_1line,
arrayInv);
rg.setAdapter(adapter);
btnOk.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
inv.setNick(etNick.getText().toString());
inv.setRg((String) rg.getSelectedItem());
RequestQueue mRequestQueue;
// Instantiate the cache
Cache cache = new DiskBasedCache(getCacheDir(), 1024 * 1024); // 1MB cap
// Set up the network to use HttpURLConnection as the HTTP client.
BasicNetwork network = new BasicNetwork(new HurlStack());
// Instantiate the RequestQueue with the cache and network.
mRequestQueue = new RequestQueue(cache, network);
// Start the queue
mRequestQueue.start();
Pesquisa_invocador();
// Formulate the request and handle the response.
makeJsonObjectRequest();
}
});
}
public void Pesquisa_invocador() {
// Eu tiro os espacos da String do _nome por que nas resposta ela vem [sem espacos e Toda minuscula]
Nome_Invocador = inv.getNick().toLowerCase();
// Monto a URL API [CLASSE DA API] com 2 Parametro [Regiao] [NomeInvocador] + [CHAVE DE DESENVOLVEDOR]
aUrl = "https://" + inv.getRg().toLowerCase() + api_pvp_net + inv.getRg().toLowerCase() + "/" + summoner_by_name + Nome_Invocador + DEVELOPMENT_API_KEY; ;
//Abro a URL no Webbroser
}
private void makeJsonObjectRequest() {
showpDialog();
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET,
aUrl, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d(TAG, response.toString());
try {
// Parsing json object response
// response will be a json object
String id = response.getString("id");
String name = response.getString("name");
String summonerLevel = response.getString("summonerLevel");
jsonResponse = "";
jsonResponse += "Name: " + name + "\n\n";
jsonResponse += "Level: " + summonerLevel + "\n\n";
jsonResponse += "ID: " + id + "\n\n";
tvLevel.setText(jsonResponse);
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
hidepDialog();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
// hide the progress dialog
hidepDialog();
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(jsonObjReq);
}
private void showpDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hidepDialog() {
if (pDialog.isShowing())
pDialog.dismiss();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
答案 0 :(得分：3)
更改行
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET,
aUrl, new Response.Listener<JSONObject>(){
到
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET,
aUrl, null, new Response.Listener<JSONObject>(){
对于GET请求，aJsonObject可以保留为null，因为仅当您想要向服务器发送数据时才需要它，例如POST / PUT / PATCH请求，来自java doc的此参数的描述是：
@param jsonRequest A {@link JSONObject} to post with the request. Null is allowed and
indicates no parameters will be posted along with request.
答案 1 :(得分：1)
JsonObjectRequest中没有与您尝试在makeJsonObjectRequest方法顶部调用的构造函数相同的构造函数。
如错误中所述，JsonObjectRequest存在以下2个构造函数：
JsonObjectRequest(String url, JSONObject jsonRequest, Listener<JSONObject> listener,
ErrorListener errorListener)
和
JsonObjectRequest(int method, String url, JSONObject jsonRequest,
Listener<JSONObject> listener, ErrorListener errorListener)
所以改变行
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET,
aUrl, new Response.Listener<JSONObject>(){
到
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET,
aUrl, aJsonObject, new Response.Listener<JSONObject>(){
答案 2 :(得分：0)
您没有在此行传递构造函数的正确参数：
JsonObjectRequest jsonObjReq = new JsonObjectRequest（Method.GET， aUrl，新的Response.Listener（）{
假设Method.GET是一个int，您应该更改它以为jsonRequest参数添加额外的null参数：
/**
* Creates a new request.
* @param method the HTTP method to use
* @param url URL to fetch the JSON from
* @param jsonRequest A {@link JSONObject} to post with the request. Null is allowed and
* indicates no parameters will be posted along with request.
* @param listener Listener to receive the JSON response
* @param errorListener Error listener, or null to ignore errors.
*/
public JsonObjectRequest(int method, String url, JSONObject jsonRequest,
Listener<JSONObject> listener, ErrorListener errorListener) {
super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener,
errorListener);
}
JsonObjectRequest jsonObjReq = new JsonObjectRequest(
aUrl, null, new Response.Listener<JSONObject>() {
或者您可以将其更改为
/**
* Constructor which defaults to <code>GET</code> if <code>jsonRequest</code> is
* <code>null</code>, <code>POST</code> otherwise.
*
* @see #JsonObjectRequest(int, String, JSONObject, Listener, ErrorListener)
*/
public JsonObjectRequest(String url, JSONObject jsonRequest, Listener<JSONObject> listener,
ErrorListener errorListener) {
this(jsonRequest == null ? Method.GET : Method.POST, url, jsonRequest,
listener, errorListener);
}
使用替代构造函数：
@Override
//Teil2
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { //Action für Switches
RelativeLayout lay1 = (RelativeLayout) findViewById(R.id.lay1);
if (switch1.isChecked()){ //isChecked() => Wenn "an"
TextView label2 = (TextView)findViewById(R.id.label2); //Label label2 auswählen
label2.setText("On");
//Layout aus activity_main.xml, verknüpft über die id. (Wenn in main "Relative layout", dann hier auch
lay1.setBackgroundColor(Color.parseColor("#ff95e1ff")); //Farbe muss geparst werden, damit Hexadezimal Zahlen gehen
}else{
TextView label2 = (TextView)findViewById(R.id.label2);
label2.setText("Off");
lay1.setBackgroundColor(Color.WHITE);
}
if (switch2.isChecked()){
TextView label3 = (TextView)findViewById(R.id.label3);
label3.setText("On");
lay1.setBackgroundColor(Color.RED);
}else{
TextView label3 = (TextView)findViewById(R.id.label3);
label3.setText("Off");
lay1.setBackgroundColor(Color.WHITE);
}
if (switch3.isChecked()){
TextView label4 = (TextView)findViewById(R.id.label4);
label4.setText("On");
lay1.setBackgroundColor(Color.GREEN);
}else{
TextView label4 = (TextView)findViewById(R.id.label4);
label4.setText("Off");
lay1.setBackgroundColor(Color.WHITE);
}
}