giovedì 24 aprile 2014

Listview cliccabile su Android

Un esempio minimale di Listview cliccabile su Android che funziona sui Fragment





--------------------------------------------------------------
package com.example.lista;

import java.util.ArrayList;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {
public static ListView lista;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
}

@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);
}

/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {


public PlaceholderFragment() {
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);


lista = (ListView) rootView.findViewById(R.id.listView1);

       String[] cognome = new String[] { "Innocenti", "Scialla", "Parauda" };
      
       final ArrayList <String> listp = new ArrayList<String>();  
       for (int i = 0; i < cognome.length; ++i) {  
            listp.add(cognome[i]);  
       }  
       ArrayAdapter <String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, listp);  
       lista.setAdapter(adapter);
       
       lista.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
   Toast.makeText(getActivity(),((TextView) view).getText(), Toast.LENGTH_SHORT).show();

}
});
return rootView;
}
}

}