java实现幻灯片页面切换动画_java–AndroidViewPager–添加带淡入/淡出动画的幻灯片,以在视图之间切换...

这就是我做到的.首先,我使用了很多

Android Displaying Bitmaps in Your UI tutorial的代码.

然后,我添加了以下调整&＃xff1a;

在包含ViewPager的活动的OnCreate中&＃xff1a;

mPager.setOnPageChangeListener(new OnPageChangeListener() {

&＃64;Override

public void onPageSelected(int arg0) {

PhotoViewerFragment currentFragment &＃61; mAdapter

.getFragment(arg0);

if (currentFragment !&＃61; null) {

if (mRunningSlideshow) {

currentFragment.addImageTransition();

}

}

}

&＃64;Override

public void onPageScrollStateChanged(int arg0) {

// TODO Auto-generated method stub

}

&＃64;Override

public void onPageScrolled(int arg0, float arg1, int arg2) {

// TODO Auto-generated method stub

}

});

在包含ViewPager的活动中运行幻灯片的Runnable&＃xff1a;

private Runnable runSlideshow &＃61; new Runnable() {

public void run() {

// Second parameter of false turns ViewPager scroll animation off

mPager.setCurrentItem(mPager.getCurrentItem() &＃43; 1, false);

mSlideshowHandler.postDelayed(runSlideshow,

SLIDESHOW_IMAGE_DURATION);

}

};

在显示图像的片段中&＃xff1a;

private static final int FADE_IN_TIME &＃61; 200;

/**

* Adds fade-in transition when in slideshow mode. Called from PhotoViewerActivity.

*/

public void addImageTransition() {

// Transition drawable with a transparent drawable and the final bitmap

final TransitionDrawable td &＃61; new TransitionDrawable(new Drawable[] {

new ColorDrawable(android.R.color.transparent),

mImageView.getDrawable() });

mImageView.setImageDrawable(td);

td.startTransition(FADE_IN_TIME);

}