Witam stworzyłem o to taki kalkulator lecz chciałbym aby wynik działania nie wyświetlał się w textview1 lecz w nowej intencji wiem że potrzebuje do wysłania taki kod lecz nie mam pojęcia gdzie dokładnie go wstawić i jak odebrać w nowej intencji wynik
Intent intent = new Intent(getBaseContext(), MainIntencjeActivity.class);
intent.putExtra("OPERATION", "PLUS");
startActivityForResult(1010, intent);
Kalkulator:
package com.example.proj2a;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
double a,b;
EditText ed1, ed2;
TextView tv1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv1 = (TextView)findViewById(R.id.textView1);
ed1 = (EditText)findViewById(R.id.editText1);
ed2 = (EditText)findViewById(R.id.editText2);
Button plus = (Button)findViewById(R.id.button1);
plus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String txt = ed1.getText().toString();
a = Double.parseDouble(txt);
txt = ed2.getText().toString();
b = Double.parseDouble(txt);
tv1.setText(Double.toString((a+b)));
}
});
Button minus = (Button)findViewById(R.id.button2);
minus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String txt = ed1.getText().toString();
a = Double.parseDouble(txt);
txt = ed2.getText().toString();
b = Double.parseDouble(txt);
tv1.setText(Double.toString((a-b)));
}
});
Button mnoz = (Button)findViewById(R.id.button3);
mnoz.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String txt = ed1.getText().toString();
a = Double.parseDouble(txt);
txt = ed2.getText().toString();
b = Double.parseDouble(txt);
tv1.setText(Double.toString((a*b)));
}
});
Button dziel = (Button)findViewById(R.id.button4);
dziel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String txt = ed1.getText().toString();
a = Double.parseDouble(txt);
txt = ed2.getText().toString();
b = Double.parseDouble(txt);
if(b==0)
tv1.setText("Nie przez 0");
else
tv1.setText(Double.toString((a/b)));
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, 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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}