when i pressed on my login button the java.lang.NullPointerException occurs, it suppose to have data from database retrieved and put into array list i defined in the code . Anyone have idea how to solve this ? thanks in advance :D
package info.androidhive.materialdesign.activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.List;
import info.androidhive.materialdesign.R;
enter code here
public class loginFragment extends Fragment {
private TextView textViewForgotPass, textView2;
private Button btnLogin;
private EditText editTextEmail, editTextPassword;
List<UserAccount> uaList;
private ProgressDialog pDialog;
private Context context;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_login, container, false);
textViewForgotPass= (TextView)rootView.findViewById(R.id.textViewForgotPass);
textViewForgotPass.setTextColor(0xAA81DEFD);
editTextEmail = (EditText)rootView.findViewById(R.id.editTextEmail);
editTextPassword = (EditText)rootView.findViewById(R.id.editTextPassword);
btnLogin=(Button)rootView.findViewById(R.id.buttonLogin);
btnLogin.setOnClickListener(loginListener);
textViewForgotPass.setOnClickListener(forgotPassListener);
pDialog = new ProgressDialog(loginFragment.this.getContext());
textView2=(TextView)rootView.findViewById(R.id.textView2);
return rootView;
}
View.OnClickListener loginListener = new View.OnClickListener() {
@Override
public void onClick(final View v) {
readUser();
}
};
View.OnClickListener forgotPassListener = new View.OnClickListener() {
@Override
public void onClick(final View v) {
Toast.makeText(loginFragment.this.getContext(), "Forgot Password?", Toast.LENGTH_SHORT).show();
}
};
private void readUser() {
try {
// Check availability of network connection.
ConnectivityManager connMgr = (ConnectivityManager)getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
Boolean isConnected = networkInfo != null && networkInfo.isConnectedOrConnecting();
if (isConnected) {
//downloadUser().execute(getResources().getString(R.string.get_user_url));
downloadUser(this.getActivity(), getResources().getString(R.string.get_user_url));
} else {
Toast.makeText(loginFragment.this.getContext(), "Network is NOT available",
Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
Toast.makeText(loginFragment.this.getContext(),
"Error reading record:" + e.getMessage(),
Toast.LENGTH_SHORT).show();
}
}
private void downloadUser(Context context, String url) {
//mPostCommentResponse.requestStarted();
RequestQueue queue = Volley.newRequestQueue(context);
JsonArrayRequest jsonObjectRequest = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
if (!pDialog.isShowing())
pDialog.show();
try{
//Clear list
uaList.clear();
for(int i=0; i < response.length();i++){
JSONObject userAccResponse = (JSONObject) response.get(i);
String email = userAccResponse.getString("email");
String password = userAccResponse.getString("password");
String name = userAccResponse.getString("name");
String address = userAccResponse.getString("address");
String phonenum = userAccResponse.getString("phonenum");
UserAccount user = new UserAccount();
user.setEmail(email);
user.setPassword(password);
user.setName(name);
user.setAddress(address);
user.setPhoneNum(phonenum);
uaList.add(user);
textView2.setText(uaList.get(0).getEmail());
}
if (pDialog.isShowing())
pDialog.dismiss();
}catch (JSONException e){
Toast.makeText(loginFragment.this.getContext(), "Erroraaaa:" + e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
Toast.makeText(loginFragment.this.getContext(), "Errorssss:" + volleyError.getMessage(), Toast.LENGTH_SHORT).show();
if (pDialog.isShowing())
pDialog.dismiss();
}
});
queue.add(jsonObjectRequest);
}
}
This is the error logs
12-15 18:38:01.618 12060-12060/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NullPointerException
at info.androidhive.materialdesign.activity.loginFragment$3.onResponse(loginFragment.java:107)
at info.androidhive.materialdesign.activity.loginFragment$3.onResponse(loginFragment.java:99)
at com.android.volley.toolbox.JsonRequest.deliverResponse(JsonRequest.java:65)
at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99)
at android.os.Handler.handleCallback(Handler.java:605)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:4624)
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:809)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:576)
at dalvik.system.NativeStart.main(Native Method)
