Apparently there are no errors in the codes, but I do not know why it's pointing out an error in the //if (log.loginstatus(user,pass)=="1"); method. Except for error there is no method in doInBackGround that changes the thread . See:
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