Progressidialog closing before the Second Activity opens

Question

I have an Activity called Login_activity, when the user logs in, I want a Progressdialog to appear, until the other Activity is fully loaded, because as I will put some things to execute in the onCreate method of the second Activity, the screen gets a locked time with nothing on the screen for the user.

Follows the Main Login_activity class...

package com.example.patrickcamargo.rmpgseguros.Apresentacao;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.Toast;

import com.example.patrickcamargo.rmpgseguros.Conexao.Conexao;
import com.example.patrickcamargo.rmpgseguros.Conexao.ConexaoInterface;
import com.example.patrickcamargo.rmpgseguros.Modelo.ErrosBD;
import com.example.patrickcamargo.rmpgseguros.Modelo.JDialogCarregando;
import com.example.patrickcamargo.rmpgseguros.R;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.Serializable;

public class Login_Activity extends AppCompatActivity implements ConexaoInterface, Serializable{

    EditText txt_loginEmail, txt_loginSenha;
    Button btn_loginEntrar;
    Login_Activity login_activity;

    JDialogCarregando jDialogCarregando = new JDialogCarregando();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login_);

        login_activity = this; //VARIAVEL CRIADA PARA PASSAR O PARAMETRO PARA A CLASSE CONEXÃO
        txt_loginEmail = (EditText)findViewById(R.id.txt_loginEmail);
        txt_loginSenha = (EditText)findViewById(R.id.txt_loginSenha);
        btn_loginEntrar = (Button) findViewById(R.id.btn_loginEntrar);

        btn_loginEntrar.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                jDialogCarregando.inicializar(login_activity,"Carregando...");
                Conexao conexao = new Conexao(getApplicationContext(), login_activity);
                String parametrosUrl = "email=" + txt_loginEmail.getText() + "&senha=" + txt_loginSenha.getText();
                conexao.execute("TCC/json_logarCliente.php",parametrosUrl);
            }
        });
    }

    @Override
    public void depoisDownload(String result) throws JSONException {
        if( result == null) {
            //SE O RESULTADO FOR NULL, QUER DIZER QUE NÃO OBTEVE SUCESSO NA COMUNICAÇÃO COM O SERVIDOR
            //ENTÃO SE EXIBE A MENSAGEM DE ERROR
            Conexao conexao = new Conexao(this, this);
            conexao.exibeSemConexao(this);
        } else if (result.contains("ERROR")) {
            //ERROR 147 QUER DIZER QUE O LOGIN ESTÁ ERRADO, ENTÃO RECEBE-SE A MENSAGEM DE DADOS INCORRETOS
            ErrosBD errosBD = new ErrosBD();
            Toast.makeText(this,errosBD.ErrosBD(result),Toast.LENGTH_LONG).show();
            txt_loginSenha.setText("");
        } else {
            //CRIANDO VARIAVEIS PARA PASSAR COMO PARAMETROS PARA A ACTIVITY PRINCIPAL
            String[] vt_carro = new String[10], vt_placa = new String[10], vt_cor = new String[10], vt_ano = new String[10];
            String p_email = null, p_nome = null, p_cpf = null, p_rg = null, p_cnh = null, p_id = null;

            //CRIANDO ARRAY COM O RESULTADO
            JSONArray minhaArray = new JSONArray(result);
            JSONObject obj;
            for (int i = 0; i < minhaArray.length(); i++) {
                obj = new JSONObject(minhaArray.getString(i));
                if (i == 0) {
                    p_nome = obj.getString("Nome");
                    p_email = obj.getString("Email");
                    p_rg = obj.getString("RG");
                    p_cnh = obj.getString("CNH");
                    p_cpf = obj.getString("CPF");
                    p_id = obj.getString("FK_Pessoa");
                } else {
                    vt_carro[i-1] = obj.getString("Marca") + " - " + obj.getString("Modelo");
                    vt_placa[i-1] = obj.getString("Placa");
                    vt_cor[i-1] = obj.getString("Cor");
                    vt_ano[i-1] = obj.getString("Ano");
                }
            }
            //PASSANDO OS PARAMETROS PARA A ACTIVITY PRINCIPAL
            Intent intent = new Intent(Login_Activity.this, MenuInicial.class);
            intent.putExtra("p_nome", p_nome);
            intent.putExtra("p_email", p_email);
            intent.putExtra("p_cpf", p_cpf);
            intent.putExtra("p_cnh", p_cnh);
            intent.putExtra("p_rg", p_rg);
            intent.putExtra("vt_carro", vt_carro);
            intent.putExtra("vt_placa", vt_placa);
            intent.putExtra("vt_cor", vt_cor);
            intent.putExtra("vt_ano", vt_ano);
            startActivity(intent);

        }
        jDialogCarregando.finalizar();
    }
}

Follow the class that displays the Progress Dialog

package com.example.patrickcamargo.rmpgseguros.Modelo;

import android.app.ProgressDialog;
import android.content.Context;

public class JDialogCarregando {
    private ProgressDialog progress;

    public void inicializar(Context context, String messageConexao)
    {
        progress = new ProgressDialog(context);
        progress.setMessage(messageConexao);
        progress.setCancelable(false);
        progress.show();
    }
    public void finalizar()
    {
        progress.dismiss();
    }

}

And finally, the second Activity that will be called

package com.example.patrickcamargo.rmpgseguros.Apresentacao;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;

import com.example.patrickcamargo.rmpgseguros.Modelo.JDialogCarregando;
import com.example.patrickcamargo.rmpgseguros.R;

import java.io.Serializable;

public class MenuInicial extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

    JDialogCarregando jDialogCarregando = new JDialogCarregando();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_menu_inicial);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        Intent intent = this.getIntent();
        Bundle bundle = intent.getExtras();

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_inicial, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_camera) {
            // Handle the camera action
        } else if (id == R.id.nav_gallery) {

        } else if (id == R.id.nav_slideshow) {

        } else if (id == R.id.nav_manage) {

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;                                                                                 

If there was a way to call the jDialogCarregando method.finish() only when the other Activity had been executed would it help....

Answer 1

The screen on the second activity gets stuck because, in fact, it’s carrying something. You should initialize your Progress in the second activity the same way he did the first time.

Note that when sending parameters via intent you complete the progress And that way there’s no way he can keep spinning while the other activity loads. So when you place the order to display the second activity it will already be running. What you should do is use your Progress again:

Declaring its function:

JDialogCarregando jDialogCarregando = new JDialogCarregando();

And then calling:

jDialogCarregando.inicializar(MenuPrincipal.this, "Carregando...");

Then just finish your function where you think the upload ends:

jDialogCarregando.finalizar();