I have problem with android viewpager slideshow. I want to show the viewpager layout after a minimum time period. Here is my code sample. My main class:
public class MainActivity extends Activity {
private ViewPager mViewPager;
private SwipeAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mViewPager = (ViewPager) findViewById(R.id.pager);
// set the adapter
adapter = new SwipeAdapter(MainActivity.this);
mViewPager.setAdapter(adapter);
mViewPager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
}
My Adapter class:
public class SwipeAdapter extends PagerAdapter {
private LayoutInflater mInflater;
private static int[] mLayouts = { R.layout.view_layout1,
R.layout.view_layout2, R.layout.view_layout3, R.layout.view_layout4 };
SwipeAdapter(Context context) {
mInflater = LayoutInflater.from(context);
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
ViewGroup pageView = (ViewGroup) mInflater.inflate(mLayouts[position],
container, false);
container.addView(pageView);
getItemPosition(pageView);
return pageView;
}
@Override
public int getCount() {
return mLayouts.length;
}
@Override
public boolean isViewFromObject(View view, Object obj) {
return view == obj;
}
}
suppose that I want to make the viewpager layout auto sliding after 10 seconds. How can it possible.
ViewPager is a layout manager that allows the user to flip left and right through pages of data. We supply an implementation of a PagerAdapter to generate the pages that the view shows. Below example shows how to make a simple image slider in android.
ViewPager2 is an improved version of the ViewPager library that offers enhanced functionality and addresses common difficulties with using ViewPager . If your app already uses ViewPager , read this page to learn more about migrating to ViewPager2 .
Use Handler to make it auto slide. Here is some code
private Handler handler = new Handler();
private Runnable runnable = new Runnable() {
public void run() {
if( position >= 4){
position = 0;
}else{
position = position+1;
}
toBarPager.setCurrentItem(position, true);
handler.postDelayed(runnable, 10000);
}
};
And don't forget to remove callback onPause()
@Override
public void onPause() {
super.onPause();
if (handler!= null) {
handler.removeCallbacks(runnable);
}
}
Also, don't forget to rerun onResume()
@Override
public void onResume() {
super.onResume(); // Always call the superclass method first
handler.postDelayed(runnable, 10000);
}
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With