首先，用户输入他的用户名和密码，然后应用程序从API获取数据列表。
当应用正在同步API中的数据时，我试图显示一个对话框，但我收到以下错误：
记录：
ERROR
07-03 14:12:29.791 24439-24439/com.rep E/AndroidRuntime﹕ FATAL EXCEPTION: main
android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
at android.view.ViewRootImpl.setView(ViewRootImpl.java:571)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:246)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
at android.app.Dialog.show(Dialog.java:281)
at com.app.login.LoginActivity$SincronizarTask.(LoginActivity.java:292)
at com.app.login.LoginActivity$AutenticacaoLocalTask.onPostExecute(LoginActivity.java:248)
at com.app.login.LoginActivity$AutenticacaoLocalTask.onPostExecute(LoginActivity.java:163)
at android.os.AsyncTask.finish(AsyncTask.java:631)
at android.os.AsyncTask.access$600(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5226)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
at dalvik.system.NativeStart.main(Native Method)
Sync类：
public class SincronizarTask extends AsyncTask {
private final ProgressDialog dialog;
private Context ctx;
private ProgressDialog mProgressDialog;
private Sincronizar mSincronizar = new Sincronizar(this.ctx);
public SincronizarTask(Context activity) {
ctx = activity;
mSincronizar = new Sincronizar(ctx);
dialog = new ProgressDialog(ctx);
dialog.setCancelable(false);
dialog.setTitle("Sincronizando");
dialog.setMessage("Aguarde...");
if (!dialog.isShowing()) {
dialog.show();
}
}
@Override
protected void onPreExecute() {
super.onPreExecute();
Log.i("RM", "onPreExecute");
}
@Override
protected Boolean doInBackground(Void... params) {
Log.i("RM", "doInBackground");
try {
ClientesRest mClientesRest = new ClientesRest(this.ctx);
Log.i("RM", "doInBackground : P1");
mClientesRest.getClientes(new ClientesRest.ClientesRestListener() {
public void clientesReceived(List clientes) {
Log.i("RM", "doInBackground : P:2");
Log.i("RM", String.valueOf(clientes));
Log.i("RM", "doInBackground : P:3");
}
});
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
@Override
protected void onPostExecute(final Boolean success) {
dialog.dismiss();
}
@Override
protected void onCancelled() {
mAutenticacaoLocalTask = null;
dialog.dismiss();
}
}
ClientRest类：
import android.content.Context;
import android.util.Log;
import com.model.ClienteModel;
import com.webservice.Servidor;
import com.webservice.volley.AuthFailureError;
import com.webservice.volley.Request;
import com.webservice.volley.RequestQueue;
import com.webservice.volley.Response;
import com.webservice.volley.VolleyError;
import com.webservice.volley.toolbox.JsonObjectRequest;
import com.webservice.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static java.lang.String.valueOf;
public class ClientesRest extends Servidor {
private String recursoRest = "clientes";
private RequestQueue mRequestQueue;
private Context context;
public ClientesRest(Context ctx) {
this.context = ctx;
}
public interface ClientesRestListener {
public void clientesReceived(List<ClienteModel> clientes);
}
public final void getClientes(final ClientesRestListener listener) {
String url = this.URL_WS + recursoRest;
mRequestQueue = Volley.newRequestQueue(this.context);
JsonObjectRequest mJsonObjectRequest = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
List<ClienteModel> clientes = null;
try {
clientes = parseJSON(response);
} catch (JSONException e) {
e.printStackTrace();
// Log.i("RM", String.valueOf(e.getStackTrace()));
}
listener.clientesReceived(clientes);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.i("RM", error.getMessage());
}
}
) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("X--TOKEN", "xxxxxxxxxxxxxxxxxxxxxxxx");
return headers;
}
};
mRequestQueue.add(mJsonObjectRequest);
}
private List<ClienteModel> parseJSON(JSONObject json) throws JSONException {
Log.i("RM", "executou o parseJSON");
/* array para armazenar os clientes */
ArrayList<ClienteModel> arrayClientes = new ArrayList<ClienteModel>();
/* pega o array "dados" que vem na resposta da consulta ao rest */
JSONArray dados = json.getJSONArray("dados");
/* percorre o array */
for (int i = 0; i < dados.length(); i++) {
/* pega a posição de cada linha no array */
JSONObject item = dados.getJSONObject(i);
/* cria um objeto do tipo ClienteModel */
ClienteModel mClienteModel = new ClienteModel();
/* cadastra os dados necessários no objeto mClienteModel */
mClienteModel.set_idrm(Integer.parseInt(item.optString("id")));
mClienteModel.set_nome(item.optString("nome"));
mClienteModel.set_tipo(item.getString("tipo"));
mClienteModel.set_endereco(item.optString("endereco"));
mClienteModel.set_numero(item.optString("numero"));
mClienteModel.set_complemento(item.optString("complemento"));
mClienteModel.set_cep(item.optString("cep"));
mClienteModel.set_bairro(item.optString("bairro"));
mClienteModel.set_cidade(item.optString("cidade"));
mClienteModel.set_estado(item.optString("estado"));
mClienteModel.set_informacao_adicional("informacao_adicional");
/* adicionar o objeto mClienteModel no array de Clientes "arrayClientes" */
arrayClientes.add(mClienteModel);
}
return arrayClientes;
}
}
答案 0 :(得分：2)
私人Sincronizar mSincronizar =新Sincronizar（this.ctx）;
替换为
私人Sincronizar mSincronizar;