Establecer página predeterminada para ViewPager en Android
Estoy usando el siguiente código, MAX es de 2 páginas. Por defecto la posición es 0 y añade una nueva página a la derecha. Inflo dos archivos de diseño.
¿Cómo puedo mostrar la page1 cuando se inicia la aplicación y agregar una nueva página a la izquierda ? Gracias.
Main.xml
<?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">
<android.support.v4.view.ViewPager
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:id="@+id/pagerView" />
</LinearLayout>
Código Java
public class MyPagerActivity extends Activity {
private Context context;
private int pageNumber;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
context = this;
ViewPager pagerView = (ViewPager)findViewById(R.id.pagerView);
pagerView.setAdapter(new AwesomePagerAdapter());
}
private class AwesomePagerAdapter extends PagerAdapter{
@Override
public void destroyItem(View collection, int position, Object view) {
((ViewPager) collection).removeView((View)view);
}
@Override
public void finishUpdate(View arg0) {
//setPageTitles(getPageNumber());
}
@Override
public int getCount() {
return 2;
}
@Override
public Object instantiateItem(View collection, int position) {
/* TextView tv = new TextView(MyPagerActivity.this);
tv.setText("Bonjour PAUG " + position);
tv.setTextColor(Color.WHITE);
tv.setTextSize(30);
((ViewPager) collection).addView(tv,0);
return tv;*/
View view = getViewToShow(position);
((ViewPager) collection).addView(view,0);
return view;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view==((View)object);
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {
// TODO Auto-generated method stub
}
@Override
public Parcelable saveState() {
// TODO Auto-generated method stub
return null;
}
@Override
public void startUpdate(View arg0) {
// TODO Auto-generated method stub
}
}
private View getViewToShow(int position){
View view = null;
View layout;
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
switch(position){
case 0:
layout = mInflater.inflate(R.layout.elements, null);
view = layout;
break;
case 1: view =
layout = mInflater.inflate(R.layout.elements2, null);
view = layout;
break;
}
return view;
}
}
58
Author: Jamie Hutton, 2011-09-13
4 answers
¿Ha intentado usar el método setCurrentItem
?
116
Author: Cristian,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2011-09-13 00:50:12
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2011-09-13 00:50:12
La solución aceptada está bien, pero es importante llamar a este método después de configurar el adaptador.
viewPager.setAdapter(adapterViewPager);
viewPager.setCurrentItem(1);
45
Author: Anor,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2016-08-17 19:34:12
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2016-08-17 19:34:12
De forma predeterminada, debe establecer el valor actual 1 para mostrar la única vista predeterminada. Si no establece setCurrentItem
en 1, no puede ver nada.
viewPager.setAdapter(adapterViewPager);
viewPager.setCurrentItem(1)
5
Author: Farruh Habibullaev,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2016-09-22 01:09:23
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2016-09-22 01:09:23
Esta solución ofrece la capacidad de establecer la página predeterminada sin interferencia desde fuera de la clase adaptador de paginador.
@Override
public Object instantiateItem(ViewGroup container, int position) {
View currentPage = null;
switch(position){
case 0:
currentPage = LayoutInflater.from(context).inflate(R.layout.page0, null)
break;
case 1:
currentPage = LayoutInflater.from(context).inflate(R.layout.page1, null)
///////////// This page will be default ////////////////////
((ViewPager)container).setCurrentItem(position);
////////////////////////////////////////////////////////////
break;
case 2:
currentPage = LayoutInflater.from(context).inflate(R.layout.page2, null)
break;
return currentPage;
}
-1
Author: Kvant,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2014-10-25 02:23:05
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2014-10-25 02:23:05