[英]Initiate slideshow after Button Click ViewPager/PagerAdapter Android
[英]Slideshow in android viewpager?
我有android viewpager幻燈片的問題。 我希望在最短時間后顯示viewpager布局。 這是我的代碼示例。 我的主要課程:
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) {
}
});
}
}
我的適配器類:
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;
}
}
假設我想讓viewpager布局在10秒后自動滑動。 怎么可能呢。
使用處理程序使其自動滑動。 這是一些代碼
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);
}
};
並且不要忘記刪除回調onPause()
@Override
public void onPause() {
super.onPause();
if (handler!= null) {
handler.removeCallbacks(runnable);
}
}
另外,不要忘記重新運行onResume()
@Override
public void onResume() {
super.onResume(); // Always call the superclass method first
handler.postDelayed(runnable, 10000);
}
使用Handler並發送[Empty] MessageDelayed / postDelayed並在ViewPager上調用setCurrentItem
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.