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I have the following problem: I have three screens:
- Main
- Activity 2
- Activity 3
In the first Activity (Main) I send a data by putExtra to Activity 2 (id user). Activity 2 is the profile screen, and at a certain point I send to a third Activity (ex: photo preview screen).
Even then it works with sending Putextra and Getextra. The problem is when I click the back button, is giving an error and stopping the application.
I’ve even searched and tried to implement something like startActivityForResult, but I didn’t understand it right and it doesn’t work.
The problem is specifically in the return of Activity 3 to Activity2, because even I try to send the user code again to this screen is giving conflict, because Activity 2 already has at its beginning a Getextra, which in turn came from Activity Main.
Example:
Activity Main:
public class MainActivity extends AppCompatActivity {
private Button btnIrAct2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnIrAct2 = (Button) findViewById(R.id.btnIrAct2);
btnIrAct2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent2 = new Intent(MainActivity.this, Activity2.class);
intent2.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent2.putExtra("id_empresa", "12345");
startActivity(intent2);
}
});
}
}
Activity 2:
public class Activity2 extends AppCompatActivity {
private Button btnIrAct3;
private String mId_Empresa = null;
static final int SERVICO_DETALHES_REQUEST = 1;
private TextView tvResultado;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_2);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
/* Recebe id de outra tela*/
mId_Empresa = getIntent().getExtras().getString("id_empresa");
tvResultado = (TextView) findViewById(R.id.tvAct2);
tvResultado.setText(mId_Empresa);
btnIrAct3 = (Button) findViewById(R.id.btnIrAct3);
btnIrAct3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent3 = new Intent(Activity2.this, Activity3.class);
intent3.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent3.putExtra("id_empresa", "12345");
startActivityForResult(intent3, SERVICO_DETALHES_REQUEST );
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == SERVICO_DETALHES_REQUEST && resultCode == RESULT_OK) {
String resultBack = data.getStringExtra("id_empresa");
}
}
}
Activity 3:
public class Activity3 extends AppCompatActivity {
private String idEmpresa = null;
private TextView resultado;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_3);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
/* Recebe id de outra tela*/
idEmpresa = getIntent().getExtras().getString("id_empresa");
resultado = (TextView) findViewById(R.id.tvAct3);
resultado.setText(idEmpresa);
}
@Override
public void finish()
{
Intent data = new Intent();
data.putExtra("id_empresa", "12345");
setResult(Activity.RESULT_OK, data);
super.finish();
}
}
I need to resolve this conflict. Send the same data as Activity 3 Putextra for Activity 2, but Activity 2 already expects a Getextra from Activity Main.