如何自动滑动android View Pager
如何自动滑动android View Pager
提问于 2012-07-28 14:53:12
可以将视图分页设置为自动幻灯片或自动分页吗？我将我的viewpager设置为像下面这样使用适配器，它工作正常：
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gridslide);
ImagePagerAdapter mAdapter = new ImagePagerAdapter(
getSupportFragmentManager(),4);
ViewPager mPager = (ViewPager) findViewById(R.id.pager);
mPager.setAdapter(mAdapter);
}适配器如下所示：
public static class ImagePagerAdapter extends FragmentStatePagerAdapter {
private final int mSize;
public ImagePagerAdapter(FragmentManager fm, int size) {
super(fm);
mSize = size;
}
@Override
public int getCount() {
return mSize;
}
@Override
public Fragment getItem(int position) {
Log.v(TAG,"position="+position);
return TheFragment.newInstance(position);
}}然而，我想知道如何让这些片段在viewpager中自动幻灯片。
Stack Overflow用户
发布于 2019-05-02 20:11:28
使用TimerTask扩展First Create Slider类
public class SliderTimer extends TimerTask {
private ViewPager viewPager;
private int size;
private Activity activity;
public SliderTimer(ViewPager viewPager, int size, Activity activity) {
this.viewPager = viewPager;
this.size = size;
this.activity = activity;
}
@Override
public void run() {
activity.runOnUiThread(() -> {
if (viewPager.getCurrentItem() < size - 1) {
viewPager.setCurrentItem(viewPager.getCurrentItem() + 1, true);
} else {
viewPager.setCurrentItem(0, true);
}
});
}
}接下来创建用于慢速滚动的SpeedSlowScroller
public class SpeedSlowScroller extends Scroller {
private int mDuration = 2500;
public SpeedSlowScroller(Context context) {
super(context);
}
public SpeedSlowScroller(Context context, Interpolator interpolator) {
super(context, interpolator);
}
public SpeedSlowScroller(Context context, Interpolator interpolator, boolean flywheel) {
super(context, interpolator, flywheel);
}
@Override
public void startScroll(int startX, int startY, int dx, int dy, int duration) {
// Ignore received duration, use fixed one instead
super.startScroll(startX, startY, dx, dy, mDuration);
}
@Override
public void startScroll(int startX, int startY, int dx, int dy) {
// Ignore received duration, use fixed one instead
super.startScroll(startX, startY, dx, dy, mDuration);
}
}最后将SpeedSlowScroller添加到ViewPager中，并将SliderTimer添加到自动滚动中
try {
Field mScroller = ViewPager.class.getDeclaredField("mScroller");
mScroller.setAccessible(true);
SpeedSlowScroller scroller = new SpeedSlowScroller(_context);
mScroller.set(your_viewpager, scroller);
Timer timer = new Timer();
timer.scheduleAtFixedRate(new SliderTimer(your_viewpager, models.size(), activity), 4000, 6000);
} catch (Exception ignored) {
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/11698987
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