我正在制作一个Android应用程序，需要调用手机的联系人列表。我需要调用联系人列表函数，选择一个联系人，然后返回我的应用程序并显示选定的联系人的名称。这里是我从互联网上找到的代码，但它不起作用。
import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.Contacts.People;
import android.view.View;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
public class Contacts extends ListActivity {
private ListAdapter mAdapter;
public TextView pbContact;
public static String PBCONTACT;
public static final int ACTIVITY_EDIT=1;
private static final int ACTIVITY_CREATE=0;
// Called when the activity is first created.
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
Cursor C = getContentResolver().query(People.CONTENT_URI, null, null, null, null);
startManagingCursor(C);
String[] columns = new String[] {People.NAME};
int[] names = new int[] {R.id.row_entry};
mAdapter = new SimpleCursorAdapter(this, R.layout.mycontacts, C, columns, names);
setListAdapter(mAdapter);
} // end onCreate()
// Called when contact is pressed
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Cursor C = (Cursor) mAdapter.getItem(position);
PBCONTACT = C.getString(C.getColumnIndex(People.NAME));
// RHS 05/06
//pbContact = (TextView) findViewById(R.id.myContact);
//pbContact.setText(new StringBuilder().append("b"));
Intent i = new Intent(this, NoteEdit.class);
startActivityForResult(i, ACTIVITY_CREATE);
}
}