[英]Slide show of screens using viewpager android
我正在開發一個Android應用程序,我想在其中創建屏幕幻燈片。我正在使用ViewPager在屏幕之間滑動,並使用Java Timer每5秒自動幻燈片一次。
問題是,我無法從一個屏幕緩慢平穩地過渡到另一個屏幕。 5秒完成后,它將立即移至下一個屏幕。我需要緩慢而平穩的過渡。可能嗎?請在下面查看我的計時器代碼並查看尋呼機代碼。
public void slideshowtimer()
{
t.scheduleAtFixedRate(new TimerTask()
{
@Override
public void run()
{
runOnUiThread(new Runnable()
{
public void run()
{
Log.e("inside", "timer - " + viewPagerCurrentItem);
myPager.setCurrentItem(viewPagerCurrentItem++);
}
});
}
}, 0, 5000);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
t = new Timer();
MyPagerAdapter adapter = new MyPagerAdapter();
myPager = (ViewPager) findViewById(R.id.viewPager);
myPager.setAdapter(adapter);
slideshowtimer();
//myPager.setCurrentItem(0);
}
private class MyPagerAdapter extends PagerAdapter {
public int getCount() {
return 3;
}
public Object instantiateItem(View collection, int position) {
LayoutInflater inflater = (LayoutInflater) collection.getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
int resId = 0;
switch (position) {
case 0:
// resId = LayoutOne.newInstance(_context);
resId = R.layout.layout_one;
break;
case 1:
resId = R.layout.layout_two;
break;
case 2:
resId = R.layout.layout_third;
break;
}
View view = inflater.inflate(resId, null);
((ViewPager) collection).addView(view, 0);
return view;
}
請幫忙。謝謝!
您是否嘗試過將Smooth Scroll設置為true? 在這里看看方法。
您是否嘗試過將自己的滾動條添加到ViewPager。 您可以設置滾動動畫以使用滾動類中的持續時間顯示。 我這樣做是這樣的:
viewFlow=(ViewPager)findViewById(R.id.presentationViewPager);
try {
Field mScroller;
Interpolator sInterpolator = new DecelerateInterpolator();
mScroller = ViewPager.class.getDeclaredField("mScroller");
mScroller.setAccessible(true);
FixedSpeedScroller scroller = new FixedSpeedScroller(viewFlow.getContext(), sInterpolator);
// scroller.setFixedDuration(5000);
mScroller.set(viewFlow, scroller);
} catch (NoSuchFieldException e) {
} catch (IllegalArgumentException e) {
} catch (IllegalAccessException e) {
}
這是我的Scroller代碼:
public class FixedSpeedScroller extends Scroller {
private int mDuration = 600;
public FixedSpeedScroller(Context context) {
super(context);
}
public FixedSpeedScroller(Context context, Interpolator interpolator) {
super(context, interpolator);
}
public FixedSpeedScroller(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);
}
}
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