新版的 android-support-v4.jar 針對 ViewPager 多了一個 interface 可以客製化切換頁面時的動畫.
可參考官方的網頁, 裡面有兩個例子.
http://developer.android.com/training/animation/screen-slide.html
可參考官方的網頁, 裡面有兩個例子.
http://developer.android.com/training/animation/screen-slide.html
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viewPager=(ViewPager)this.findViewById(R.id.viewPager);
PageTransformer pageTransformer=new PageTransformer() {
@Override
public void transformPage(View arg0, float arg1) {
arg0.setAnimation(AnimationUtils.loadAnimation(ViewPagerActivity.this, android.R.anim.slide_out_right));
}
};
viewPager.setPageTransformer(true, pageTransformer);
public class ZoomOutPageTransformer implements ViewPager.PageTransformer {
private static final float MIN_SCALE = 0.85f;
private static final float MIN_ALPHA = 0.5f;
@SuppressLint("NewApi")
public void transformPage(View view, float position)
{
int pageWidth = view.getWidth();
int pageHeight = view.getHeight();
Log.d("dd",view.getTag()+" pageWidth:"+pageWidth+" pageHeight:"+pageHeight+" position:"+position);
if (position < -1) { // [-Infinity,-1) // This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 1) { // [-1,1] // Modify the default slide transition to shrink the page as well
float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
float vertMargin = pageHeight * (1 - scaleFactor) / 2;
float horzMargin = pageWidth * (1 - scaleFactor) / 2;
if (position < 0) {
view.setTranslationX(horzMargin - vertMargin / 2);
}
else {
view.setTranslationX(-horzMargin + vertMargin / 2);
} // Scale the page down (between MIN_SCALE and 1)
view.setScaleX(scaleFactor);
view.setScaleY(scaleFactor); // Fade the page relative to its size.
view.setAlpha(MIN_ALPHA +(scaleFactor - MIN_SCALE) / (1 - MIN_SCALE) * (1 - MIN_ALPHA));
} else { // (1,+Infinity] // This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
private static final float MIN_SCALE = 0.85f;
private static final float MIN_ALPHA = 0.5f;
@SuppressLint("NewApi")
public void transformPage(View view, float position)
{
int pageWidth = view.getWidth();
int pageHeight = view.getHeight();
Log.d("dd",view.getTag()+" pageWidth:"+pageWidth+" pageHeight:"+pageHeight+" position:"+position);
if (position < -1) { // [-Infinity,-1) // This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 1) { // [-1,1] // Modify the default slide transition to shrink the page as well
float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
float vertMargin = pageHeight * (1 - scaleFactor) / 2;
float horzMargin = pageWidth * (1 - scaleFactor) / 2;
if (position < 0) {
view.setTranslationX(horzMargin - vertMargin / 2);
}
else {
view.setTranslationX(-horzMargin + vertMargin / 2);
} // Scale the page down (between MIN_SCALE and 1)
view.setScaleX(scaleFactor);
view.setScaleY(scaleFactor); // Fade the page relative to its size.
view.setAlpha(MIN_ALPHA +(scaleFactor - MIN_SCALE) / (1 - MIN_SCALE) * (1 - MIN_ALPHA));
} else { // (1,+Infinity] // This page is way off-screen to the right.
view.setAlpha(0);
}
}
}