My bad.. there is another text.xml in the layout folder... <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <ListView android:id="@+id/list" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
On Aug 12, 3:22 pm, Erik R <[email protected]> wrote: > On the line: > lv = (ListView) findViewById(R.id.list); > > You are trying to get a handle on a ListView that does not exist in > the XML that you are showing. > > On Aug 12, 1:34 pm, Warrior <[email protected]> wrote: > > > can anyone tell me whats wrong or suggest the best way to populate a > > ListView on runtime from one screen to another. > > Please see my code below > > 1. the list always ends up empty > > 2. I get a invalid resource error in the end. > > > <?xml version="1.0" encoding="utf-8"?> > > <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ > > android" > > android:orientation="vertical" > > android:layout_width="fill_parent" > > android:layout_height="fill_parent" > > > <TextView > > android:layout_width="fill_parent" > > android:layout_height="wrap_content" android:text="@string/hello" /> > > <EditText > > android:id="@+id/entry" android:layout_width="fill_parent" > > android:layout_height="wrap_content" > > android:background="@android:drawable/editbox_background"/> > > <Button android:id="@+id/ok" > > android:layout_width="wrap_content" > > android:layout_height="wrap_content" android:layout_below="@id/ > > entry" android:layout_alignParentRight="true" > > android:layout_marginLeft="10dip" android:text="Add to List" /> > > <Button android:id="@+id/viewlist" > > android:layout_width="wrap_content" > > android:layout_height="wrap_content" > > android:layout_below="@id/ok" > > android:layout_alignParentRight="true" > > android:layout_marginLeft="10dip" > > android:text="View List" /> > > </LinearLayout> > > > public class HelloWorld extends Activity { > > > /** Called when the activity is first created. */ > > > public ListView lv; > > public ArrayList<String> arr = new ArrayList<String>(); > > > @Override > > public void onCreate(Bundle savedInstanceState) { > > super.onCreate(savedInstanceState); > > setContentView(R.layout.main); > > > Button okButton = (Button) findViewById(R.id.ok); > > okButton.setOnClickListener(new View.OnClickListener() { > > public void onClick(View v) { > > EditText et = (EditText) findViewById(R.id.entry); > > arr.add(et.getText().toString()); > > Toast.makeText(HelloWorld.this, "Added: " + et.getText(), > > Toast.LENGTH_SHORT).show(); > > et.bringToFront(); > > } > > }); > > > Button viewListButton = (Button) findViewById(R.id.viewlist); > > viewListButton.setOnClickListener(new View.OnClickListener() { > > public void onClick(View v) { > > setContentView(R.layout.text); > > lv = (ListView) findViewById(R.id.list); > > lv.setAdapter(new > > ArrayAdapter<String>(HelloWorld.this, R.id.list, arr)); > > } > > }); > > } > > > } -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
