pass data onItemClickListener in in ListView loaded with JSON to show them in another activity

To send the parameters to a new activity, you must first obtain the ArrayList object since onItemClick only returns the position and finally send the information in the Intent.

I leave the example done for the code you have shown:

lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
        Product selectedProduct = arrayList.get(position);

        Intent intent = new Intent(getApplicationContext(), NuevaActivity.class);
        intent.putExtra("nombre", selectedProduct.getName());
        intent.putExtra("contenido", selectedProduct.getContent());
        intent.putExtra("extra1", selectedProduct.getExtra());
        startActivity(intent);
    }
});

Note that the functions getName (), getContent (), getExtra () must exist in the Product class and return the corresponding string.

Once the data has been sent in the Intent, you must obtain it in NuevaActivity in this way:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.nueva_activity);

    Intent intent = getIntent();
    String nombre = intent.getStringExtra("nombre");
    String contenido = intent.getStringExtra("contenido");
    String extra = intent.getStringExtra("extra1");

    ... Resto de codigo de tu actividad, como los setText correpondientes etc...
}

You should use a Intent to pass the information to the new Activity.

Intent intent = new Intent(this, tuNuevaActivdad.class);

And assign the information you want to pass with the putExtra method:

intent.putExtra("loquequieras", "tuValor");

Finally, launch the Intent:

startActivity(intent);

Within your listView would be:

lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
            Intent intent = new Intent(this, tuNuevaActivdad.class);
            intent.putExtra("loquequieras", "tuValor");
            startActivity(intent);
        }
    });

And then to recover the data from your Activity tuNuevaActividad you should collect the intent using the getIntent method and the information using the getStringExtra method since in this case we have passed a String .

Intent intent = getIntent();
String tuValor = intent.getStringExtra("loquequieras"); //Recuperas el String "tuValor"

Very important:

• The meaningful string, in this case, loquequieras must be the same both when assigning the data and to retrieve it. You can put the String identification you want.

• It is not mandatory that as a second parameter you pass a String . You can pass int , Char , Serializable , etc ... You can see all the types of data that you can pass here . You also have to keep in mind that to recover the data you will also change the method to getIntExtra , getCharExtra , getSerializableExtra , etc. according to the type of data that you have passed.

What you want is to send variables between Activities, this is done through an Intent:

Intent intent = new Intent(this, SegundaActivity.class);
intent.putExtra("VARIABLE1", variable);
intent.putExtra("VARIABLE2", otravariable);
startActivity(intent);

In the Activity that receives these values, you can obtain them through the Bundle :

 Bundle b = getIntent().getExtras();
 String variable_recibida1 = b.getString("VARIABLE1");
 String variable_rcibida2 = b.getString("VARIABLE2");

To execute the intent from your Activity, by means of a button,

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Envía datos!" />

</LinearLayout>

simply add a listener to the button to perform the intent:

Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View arg0) {

    Intent intent = new Intent(this, SegundaActivity.class);
    intent.putExtra("VARIABLE1", variable);
    intent.putExtra("VARIABLE2", otravariable);
    startActivity(intent);

    }

});