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Apparently there are no errors in the codes, but I don’t know why you’re pointing out an error in the method //if (log.loginstatus(user,pass)=="1"); Unless mistaken there is no method in the doInBackGround amending the thread. Look at:
Class MainActivityLogin:
public class MainActivityLogin extends Activity {
EditText user;
EditText pass;
Button bt_entrar;
TextView registrar;
Httppostaux post;
String IP_Server="192.168.x.x:xxxx";
String URL_connect="http://"+IP_Server+"/Elz";
boolean result_back;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
user = (EditText) findViewById(R.id.id_edt_nome);
user.setHint("Insira o usuário...");
pass = (EditText) findViewById(R.id.id_edt_senha);
pass.setHint("Insira a senha...");
bt_entrar = (Button) findViewById(R.id.id_bt_entrar);
post = new Httppostaux();
bt_entrar.setOnClickListener(new View.OnClickListener(){
public void onClick(View view){
String usuario=user.getText().toString();
String passw=pass.getText().toString();
if( checklogindata( usuario , passw )==true){
new Asy_task().execute(usuario,passw);
}else{
err_login();
}
};
}); //wtf?
}
public void err_login(){
Vibrator vibrator =(Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(200);
Toast toast1 = Toast.makeText(getApplicationContext(),"Error:Nome de usuario ou senha incorretos", Toast.LENGTH_SHORT);
toast1.show();
}
public String loginstatus(String username ,String password ) {
int logstatus=-1;
ArrayList<NameValuePair> postparameters2send= new ArrayList<NameValuePair>();
postparameters2send.add(new BasicNameValuePair("usuario",username));
postparameters2send.add(new BasicNameValuePair("password",password));
JSONArray jdata=post.getserverdata(postparameters2send, URL_connect);
if (jdata!=null && jdata.length() > 0){
JSONObject json_data;
try {
json_data = jdata.getJSONObject(0);
logstatus=json_data.getInt("logstatus");
Log.e("loginstatus","logstatus= "+logstatus);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (logstatus==0){// [{"logstatus":"0"}]
Log.e("loginstatus ", "invalido");
return "0";
}
else{
Log.e("loginstatus ", "valido");
return "1";
}
}else{
Log.e("JSON ", "ERROR");
return "0";
}
}
public boolean checklogindata(String username ,String password ){
if (username.equals("") || password.equals("")){
Log.e("Login ui", "checklogindata user or pass error");
return false;
}else{
return true;
}
}
}
Class Asy_task:
public class Asy_task extends AsyncTask <String, String, String> {
boolean result_back;
MainActivityLogin log;
//private ProgressDialog pDialog;
String user,pass;
@Override
protected String doInBackground(String... params) {
user=params[0];
pass=params[1];
if (log.loginstatus(user,pass)=="1"){
return "ok";
}else{
return "err";
}
}
@Override
protected void onPostExecute(String result) {
//pDialog.dismiss();
Log.e("onPostExecute=",""+result);
if (result.equals("ok")){
//Intent i=new Intent(this, Tela_01.class);
//i.putExtra("user",user);
//startActivity(i);
}
if (result.equals("err")){
log.finish();
}
}
}
Logcat error:
08-17 10:57:26.021: W/dalvikvm(1142): threadid=11: thread exiting with uncaught exception (group=0xb4a8dba8)
08-17 10:57:26.111: E/AndroidRuntime(1142): FATAL EXCEPTION: AsyncTask #1
08-17 10:57:26.111: E/AndroidRuntime(1142): Process: com.example.followjud, PID: 1142
08-17 10:57:26.111: E/AndroidRuntime(1142): java.lang.RuntimeException: An error occured while executing doInBackground()
08-17 10:57:26.111: E/AndroidRuntime(1142): at android.os.AsyncTask$3.done(AsyncTask.java:300)
08-17 10:57:26.111: E/AndroidRuntime(1142): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
08-17 10:57:26.111: E/AndroidRuntime(1142): at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
08-17 10:57:26.111: E/AndroidRuntime(1142): at java.util.concurrent.FutureTask.run(FutureTask.java:242)
08-17 10:57:26.111: E/AndroidRuntime(1142): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
08-17 10:57:26.111: E/AndroidRuntime(1142): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
08-17 10:57:26.111: E/AndroidRuntime(1142): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
08-17 10:57:26.111: E/AndroidRuntime(1142): at java.lang.Thread.run(Thread.java:841)
08-17 10:57:26.111: E/AndroidRuntime(1142): Caused by: java.lang.NullPointerException
08-17 10:57:26.111: E/AndroidRuntime(1142): at com.example.followjud.Asy_task.doInBackground(Asy_task.java:31)
08-17 10:57:26.111: E/AndroidRuntime(1142): at com.example.followjud.Asy_task.doInBackground(Asy_task.java:1)
08-17 10:57:26.111: E/AndroidRuntime(1142): at android.os.AsyncTask$2.call(AsyncTask.java:288)
08-17 10:57:26.111: E/AndroidRuntime(1142): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
08-17 10:57:26.111: E/AndroidRuntime(1142): ... 4 more
Take a look at line 31 of your class
Asy_task, there was aNPEthere. How is setting the attributelog? At first you’re making use of it but I don’t see the attribution of it in your code.– Wakim
Good evening, thank you for the answer. I’m trying to understand.. When you say (I don’t see the attribution of it in your code) are you referring to the function of the "loginstatus" method? Pq the log is the reference I gave the Mainactivitylogin class to call the method. I still can’t solve the T_T error
– OsírisAguiar
What I say is that at no time have I seen you set the variable
log, and when calling the methodloginstatusin a null object generates the error.– Wakim
Aaaaa. I did the following then: protected void onPreExecute() { log = new Mainactivitylogin(); }/ Eh this?
– OsírisAguiar
It’s hard to find the solution.
– OsírisAguiar