如何设置进度对话框直到服务器响应？我正在尝试，但它在show进度对话框中显示错误Volley StringRequest public class Loginn extends Activity {
Button btn1,btn2,btn3;
EditText et1,et2;
TextView waittv;
SharedPreferences sp;
CheckBox cb1;
ProgressDialog pd;
ProgressDialog progressDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
btn1=(Button)findViewById(R.id.btn1);
btn2=(Button)findViewById(R.id.btn2);
btn3=(Button)findViewById(R.id.regbtn);
waittv=(TextView)findViewById(R.id.waittv);
et1=(EditText)findViewById(R.id.et1);
et2=(EditText)findViewById(R.id.et2);
cb1=(CheckBox)findViewById(R.id.cb1);
btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
final String mobile = et1.getText().toString();
String pword = et2.getText().toString();
if (mobile.isEmpty()) {
et1.setError("please enter Mobile no.");
} else if (pword.isEmpty()) {
et2.setError("please enter password");
} else {
//progressDialog= new ProgressDialog(getApplicationContext());
//progressDialog.setTitle("Wait for login ...");
//progressDialog.setMessage("if it takes much time,then check your internet connectivity...");
//progressDialog.show();
Response.Listener<String> listener=new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jsonResponse =new JSONObject(response);
boolean success=jsonResponse.getBoolean("success");
if(success){
String fname=jsonResponse.getString("first_name");
String lname=jsonResponse.getString("last_name");
Toast.makeText(getApplicationContext(),"Login Success", Toast.LENGTH_LONG).show();
//progressDialog.dismiss();
Intent intent=new Intent(getApplicationContext(),Profile.class);
Loginn.this.startActivity(intent);
}
else
{ Toast.makeText(getApplicationContext(),"Incorrect mobile/password", Toast.LENGTH_LONG).show();
pd.dismiss();
//progressDialog.dismiss();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
};
LoginRequest loginRequest=new LoginRequest(mobile,pword,listener);
RequestQueue queue= Volley.newRequestQueue(getApplicationContext());
queue.add(loginRequest);
}
}
});
}
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:310)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:85)
at android.app.Dialog.show(Dialog.java:319)
at android.app.ProgressDialog.show(ProgressDialog.java:116)
at android.app.ProgressDialog.show(ProgressDialog.java:99)
at android.app.ProgressDialog.show(ProgressDialog.java:94)
错误就像：
{{1}}
答案 0 :(得分：1)
我认为你应该修改你传递给Context构造函数的ProgressDialog：
progressDialog= new ProgressDialog(Loginn.this);
其余的保持不变。