Send and receive information from Activities
This is an easy example about how to pass information from one Activity to another and receive back information.
// ActivityOne.java
public class ActivityOne extends Activity {
private static final int ACT_TWO_CODE = 123;
private static final String EXTRA_STRING = "extra_string";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = new Intent(this, ActivityTwo.class);
intent.putExtra(ActivityTwo.EXTRA_BOOLEAN, true);
this.startActivityForResult(intent, ACT_TWO_CODE);
}
@Override
public void onActivityResult(
int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK && requestCode == ACT_TWO_CODE) {
String result = data.getExtras().getString(ActivityOne.EXTRA_STRING);
result = result==null ? "Error receiving info" : result;
Toast.makeText(this, result, Toast.LENGTH_LONG);
}
}
}
// ActivityTwo.java
public class ActivityTwo extends Activity {
private static final String EXTRA_BOOLEAN = "extra_boolean";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Boolean result = this.getIntent().getBooleanExtra(name, false);
if (result == true) {
Intent intent = new Intent(this, ActivityTwo.class);
intent.putExtra(ActivityOne.EXTRA_STRING, "Hello from Activity two!");
this.setResult(Activity.RESULT_OK, intent);
} else {
this.setResult(Activity.RESULT_CANCELED);
}
this.finish();
}
}