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 since I'm going to put some things to execute in the onCreate method of the second Activity, the screen a time locked with nothing on the screen for the user.
Follow 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 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 you had a way to call the jDialogLoading.finalize () method only when the other activity was running it would help ....