Hello i have 2 activities in android, and i want to go from one activity to another using a button. The main activity is:
public class AppActivity extends Activity
{
Button button;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
addListenerOnButton();
}
public void addListenerOnButton() {
final Context context = this;
button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent = new Intent(context, App2Activity.class);
startActivity(intent);
}
});
}
}
And it works just fine, but then i have the second activity that is supposed to call the first activity but does nothing:
public class App2Activity extends Activity implements OnClickListener {
Button button, button_n1, button_n2, button_n3, button_n4, button_n5, button_n6, button_n7, button_n8, button_n9, button_n0, button_clear, button_div, button_mult, button_mais, button_menos, button_igual, button_pt;
EditText textcalc;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
textcalc = (EditText) findViewById(R.id.textcalc);
Float num1, num2, total;
button = (Button) findViewById(R.id.button2);
button_n0 = (Button) findViewById(R.id.button_n0);
button_n1 = (Button) findViewById(R.id.button_n1);
button_n2 = (Button) findViewById(R.id.button_n2);
button_n3 = (Button) findViewById(R.id.button_n3);
button_n4 = (Button) findViewById(R.id.button_n4);
button_n5 = (Button) findViewById(R.id.button_n5);
button_n6 = (Button) findViewById(R.id.button_n6);
button_n7 = (Button) findViewById(R.id.button_n7);
button_n8 = (Button) findViewById(R.id.button_n8);
button_n9 = (Button) findViewById(R.id.button_n9);
button_clear = (Button) findViewById(R.id.button_clear);
button_mult = (Button) findViewById(R.id.button_mult);
button_div = (Button) findViewById(R.id.button_div);
button_mais = (Button) findViewById(R.id.button_mais);
button_menos = (Button) findViewById(R.id.button_menos);
button_igual = (Button) findViewById(R.id.button_igual);
button_pt = (Button) findViewById(R.id.button_pt);
// set a listener
button_div.setOnClickListener(this);
button_mult.setOnClickListener(this);
button_mais.setOnClickListener(this);
button_menos.setOnClickListener(this);
button_clear.setOnClickListener(this);
button_igual.setOnClickListener(this);
button_pt.setOnClickListener(this);
button.setOnClickListener(this);
button_n0.setOnClickListener(this);
button_n1.setOnClickListener(this);
button_n2.setOnClickListener(this);
button_n3.setOnClickListener(this);
button_n4.setOnClickListener(this);
button_n5.setOnClickListener(this);
button_n6.setOnClickListener(this);
button_n7.setOnClickListener(this);
button_n8.setOnClickListener(this);
button_n9.setOnClickListener(this);
}
@Override
public void onClick(View v) {
String texto;
texto = textcalc.getText().toString();
Boolean numeros_existem = texto.endsWith("0") || texto.endsWith("1") || texto.endsWith("2") || texto.endsWith("3") || texto.endsWith("4") || texto.endsWith("5") || texto.endsWith("6") || texto.endsWith("7") || texto.endsWith("8") || texto.endsWith("9");
switch (v.getId()) {
case R.id.button://n?o está a funcionar
Intent intent2 = new Intent(App2Activity.this, AppActivity.class);
startActivity(intent2);//vai come?ar a activity que é definida no 2oparametro de intent
break;
//many more cases...
}
}
}
Does someone has a clue why it doen't work?
SOLVED
It seems i was seaching for something that didn't exit. I changed the case to:
switch (v.getId()) {
case R.id.button2://this is the correct id
Intent intent2 = new Intent(App2Activity.this, AppActivity.class);
startActivity(intent2);//vai come?ar a activity que é definida no 2oparametro de intent
break;
//many more cases...
}
