I am a beginner programmer so please bear with me. I am trying to create an app where the item in the list view affects what will be displayed in the next activity. So far, I have the list activity:
public class Primary extends ListActivity{
private static final String[] items = {"Item1", "Item2", "Item3", "item4", "Item5"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items));
TextView heading =(TextView)findViewById(R.id.listViewHeading);
heading.setText("Primary");
}
public void onListItemClick(ListView parent, View v, int position, long id){
}
and for the second activity, I have this:
public class ImageActivity extends Activity{
TextView heading;
ImageView image;
TextView text;
public static final String[] headings={"heading 1", "heading 2", "heading 3", "heading 4", "heading 5",};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.image_activity);
heading = (TextView)findViewById(R.id.adHeading);
image = (ImageView)findViewById(R.id.adImage);
text =(TextView)findViewById(R.id.adText);
addInfo();
}
private void addInfo() {
heading.setText(headings[x]);
image.setImageResource(images[x]);
text.setText(text[x]);
}
How can i make it so that the heading, image, and text change based on what item in the list view was selected?
In the listview Activity.
Intent i = new Intent(this, ImageActivity.class);
i.putExtra("data", data);
startActivity(i);
The next Acitivty onCreate() method.
final String data = getIntent().getStringExtra("data");
Use the "extras" feature that are part of an Intent.
When you call start ImageActivity from Primary, you can use a 'extras' to pass information between the two.
See this link for details.
I'll give you a basic example here. When the list item is clicked, put the data that you want ImageActivity to have into the intent using "putExtra".
Intent intent = new Intent(getBaseContext(), ImageActivity.class);
String data = "somedata";
intent.putExtra("DATA", data);
startActivity(intent)
Then, in ImageActivity onCreate, retrieve the data like this:
Bundle extras = getIntent().getExtras();
if(extras !=null) {
String data= extras.getString("DATA"); // matches the tag used in putExtra
}
Once you have retrieved the data, set the necessary views.
I think u want to set the heading, image and text in second activity, related to first activity's selected index in list.
just do 1 thing, put following code in 1st activity
public void onListItemClick(ListView parent, View v, int position, long id)
{
Intent intent = new Intent(this.getApplicationContext(), ImageActivity.class);
intent.putExtra("pos", position);
startActivity(intent);
}
so, now ur passing the position of item selected in list.
now, put following code in next activity
private void addInfo()
{
Bundle ext = getIntent().getExtras();
if(ext != null)
{
int pos= ext.getInteger("pos");
// ext.getInt("pos");
heading.setText(headings[pos]);
// hey, frend, you don't have any array for selecting image-name and text
// image.setImageResource(images[x]);
// text.setText(text[x]);
}
}
use below code
public void onListItemClick(ListView parent, View v, int position, long id)
{
Intent intent = new Intent(Primary.this, ImageActivity.class);
intent.putExtra("selected value", item[position]);
startActivity(intent);
}
in ImageActivity class:in oncreate (or you can put item variable as global)
String item = getIntent().getStringExtra("Selected value");
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