I am developing an app delivery (with client version and adm) in which in the administrator version it changes the status of the requests through a spinner, after this the client app receives a status update. The problem is that when I change the status the error below occurs.
Log Cat
04-03 15:17:55.920 22138-22138/com.vsousa.burgaoadm E/UncaughtException: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.vsousa.burgaoadm/com.vsousa.burgaoadm.Home}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.vsousa.burgaoadm.Model.User.getName()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.vsousa.burgaoadm.Model.User.getName()' on a null object reference
at com.vsousa.burgaoadm.Home.onCreate(Home.java:121)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
Home.class
package com.vsousa.burgaoadm;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
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 android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;
import com.google.firebase.iid.FirebaseInstanceId;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.OnProgressListener;
import com.google.firebase.storage.StorageReference;
import com.google.firebase.storage.UploadTask;
import com.rengwuxian.materialedittext.MaterialEditText;
import com.squareup.picasso.Picasso;
import com.vsousa.burgaoadm.Common.Common;
import com.vsousa.burgaoadm.Interface.ItemClickListener;
import com.vsousa.burgaoadm.Model.Category;
import com.vsousa.burgaoadm.Model.Token;
import com.vsousa.burgaoadm.ViewHolder.MenuViewHolder;
import java.util.UUID;
public class Home extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
TextView txtFullName;
FirebaseDatabase database;
DatabaseReference categories;
FirebaseStorage storage;
StorageReference storageReference;
FirebaseRecyclerAdapter<Category, MenuViewHolder> adapter;
RecyclerView recycler_menu;
RecyclerView.LayoutManager layoutManager;
MaterialEditText edtName;
Button btnUpload, btnSelect;
Category newCategory;
Uri saveUri;
DrawerLayout drawer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle("Menu Adm");
setSupportActionBar(toolbar);
//Iniciar Firebase
database = FirebaseDatabase.getInstance();
categories = database.getReference("Category");
storage = FirebaseStorage.getInstance();
storageReference = storage.getReference();
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showDialog();
}
});
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.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
//Setando nome do usuário
View headerView = navigationView.getHeaderView(0);
txtFullName = headerView.findViewById(R.id.txtFullName);
txtFullName.setText(Common.currentUser.getName());
//Iniciar Visualização
recycler_menu = findViewById(R.id.recycler_menu);
recycler_menu.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
recycler_menu.setLayoutManager(layoutManager);
loadMenu();
//Enviando Token
updateToken(FirebaseInstanceId.getInstance().getToken());
}
private void updateToken(String token) {
FirebaseDatabase db = FirebaseDatabase.getInstance();
DatabaseReference tokens = db.getReference("Tokens");
Token data = new Token(token, true);
tokens.child(Common.currentUser.getPhone()).setValue(data);
}
private void showDialog() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(Home.this);
alertDialog.setTitle("Adicionar nova categoria");
alertDialog.setMessage("Preencha todas as informações!");
LayoutInflater inflater = this.getLayoutInflater();
View add_menu_layout = inflater.inflate(R.layout.add_new_menu_layout, null);
edtName = add_menu_layout.findViewById(R.id.edtName);
btnSelect = add_menu_layout.findViewById(R.id.btnSelect);
btnUpload = add_menu_layout.findViewById(R.id.btnUpload);
//Evento do Botão
btnSelect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
chooseImage(); //Para selecionar imagens da galeria
}
});
btnUpload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
uploadImage();
}
});
alertDialog.setView(add_menu_layout);
alertDialog.setIcon(R.drawable.ic_playlist_add_black_24dp);
//Setando botão
alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
//Aqui, apenas cria uma nova categoria
if (newCategory != null)
{
categories.push().setValue(newCategory);
Snackbar.make(drawer, "Nova categoria "+newCategory.getName()+" foi adicionada!", Snackbar.LENGTH_SHORT).show();
}
}
});
alertDialog.setNegativeButton("Cancelar", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
Toast.makeText(Home.this, "Processo cancelado", Toast.LENGTH_SHORT).show();
}
});
alertDialog.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == Common.PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null)
{
saveUri = data.getData();
btnSelect.setText("Imagem Carregada"); //Mostra mensagem após a imagem ser escolhida
}
}
//SELECIONAR IMAGEM
private void chooseImage() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Selecione imagem"), Common.PICK_IMAGE_REQUEST);
}
//CARREGANDO IMAGEM
private void uploadImage() {
if (saveUri != null)
{
final ProgressDialog mDialog = new ProgressDialog(this);
mDialog.setMessage("Carregando...");
mDialog.show();
String imageName = UUID.randomUUID().toString();
final StorageReference imageFolder = storageReference.child("images/"+imageName);
imageFolder.putFile(saveUri)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
mDialog.dismiss();
Toast.makeText(Home.this, "Finalizado!", Toast.LENGTH_SHORT).show();
imageFolder.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
//Setando valores na nova categoria
newCategory = new Category(edtName.getText().toString(), uri.toString());
}
});
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
mDialog.dismiss();
Toast.makeText(Home.this, ""+e.getMessage(), Toast.LENGTH_SHORT).show();
}
})
.addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
double progress = (100 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
mDialog.setMessage("Carregando "+progress+"%");
}
});
}
}
private void loadMenu() {
adapter = new FirebaseRecyclerAdapter<Category, MenuViewHolder>(
Category.class,
R.layout.menu_item,
MenuViewHolder.class,
categories
) {
@Override
protected void populateViewHolder(MenuViewHolder viewHolder, Category model, int position) {
viewHolder.txtMenuName.setText(model.getName());
Picasso.with(Home.this).load(model.getImage())
.into(viewHolder.imageView);
viewHolder.setItemClickListener(new ItemClickListener() {
@Override
public void onClick(View view, int position, boolean isLongClick) {
//Abir nova tela de acordo com a categoria
Intent foodList = new Intent(Home.this, FoodList.class);
foodList.putExtra("CategoryId", adapter.getRef(position).getKey());
startActivity(foodList);
}
});
}
};
//Atualizar dados se houver mudanças
adapter.notifyDataSetChanged();
recycler_menu.setAdapter(adapter);
}
@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.home, 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_menu) {
} else if (id == R.id.nav_orders) {
Intent OrderIntent = new Intent(Home.this, OrderStatus.class);
startActivity(OrderIntent);
/* } else if (id == R.id.nav_cart) {
Intent cartIntent = new Intent(Home.this, Cart.class);
startActivity(cartIntent);
} else if (id == R.id.nav_sobre) { */
} else if (id == R.id.nav_sair) {
Intent signIn = new Intent(Home.this, SignIn.class);
signIn.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(signIn);
/* } else if (id == R.id.nav_contato) {
Intent contato = new Intent(Home.this, Contato.class);
startActivity(contato);
} else if (id == R.id.nav_endereco) {
Intent endereco = new Intent(Home.this, Endereco.class);
startActivity(endereco);
} else if (id == R.id.nav_app) {
Intent info = new Intent(Home.this, Info.class);
startActivity(info); */
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
//Setar nome default
edtName.setText(item.getName());
alertDialog.show();
}
private void changeImage(final Category item) {
if (saveUri != null)
{
final ProgressDialog mDialog = new ProgressDialog(this);
mDialog.setMessage("Carregando...");
mDialog.show();
String imageName = UUID.randomUUID().toString();
final StorageReference imageFolder = storageReference.child("images/"+imageName);
imageFolder.putFile(saveUri)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
mDialog.dismiss();
Toast.makeText(Home.this, "Finalizado!", Toast.LENGTH_SHORT).show();
imageFolder.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
@Override
public void onSuccess(Uri uri) {
//Setando valores na nova categoria
item.setImage(uri.toString());
}
});
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
mDialog.dismiss();
Toast.makeText(Home.this, ""+e.getMessage(), Toast.LENGTH_SHORT).show();
}
})
.addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
double progress = (100 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
mDialog.setMessage("Carregando "+progress+"%");
}
});
}
}
}
Common.class
package com.vsousa.burgaoadm.Common;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import com.vsousa.burgaoadm.Model.Request;
import com.vsousa.burgaoadm.Model.User;
import com.vsousa.burgaoadm.Remote.APIService;
import com.vsousa.burgaoadm.Remote.FCMRetrofitClient;
import com.vsousa.burgaoadm.Remote.IGeoCoordinates;
import com.vsousa.burgaoadm.Remote.RetrofitClient;
/**
* Created by valdemir.sousa on 15/02/2018.
*/
public class Common {
public static User currentUser;
public static Request currentRequest;
public static final String UPDATE = "Alterar";
public static final String DELETE = "Remover";
public static final int PICK_IMAGE_REQUEST = 71;
public static final String baseUrl = "https://maps.googleapis.com";
public static final String fcmUrl = "https://fcm.googleapis.com/";
public static String convertCodeToStatus (String code)
{
switch (code) {
case "0":
return "Pedido recebido";
case "1":
return "Pedido em preparação";
case "2":
return "Pedido a caminho";
case "3":
return "Pedido entregue";
default:
return "Pedido recebido";
}
}
public static APIService getFCMClient(){
return FCMRetrofitClient.getClient(fcmUrl).create(APIService.class);
}
public static IGeoCoordinates getGeoCodeService(){
return RetrofitClient.getClient(baseUrl).create(IGeoCoordinates.class);
}
public static Bitmap scaleBitmap(Bitmap bitmap, int newWidth, int newHeight)
{
Bitmap scaleBitmap = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
float scaleX = newWidth/ (float)bitmap.getWidth();
float scaleY = newHeight/ (float)bitmap.getHeight();
float pivotX = 0, pivotY = 0;
Matrix scaleMatrix = new Matrix();
scaleMatrix.setScale(scaleX, scaleY, pivotX, pivotY);
Canvas canvas = new Canvas(scaleBitmap);
canvas.setMatrix(scaleMatrix);
canvas.drawBitmap(bitmap, 0, 0, new Paint(Paint.FILTER_BITMAP_FLAG));
return scaleBitmap;
}
}