佈局文件:主要看ImageView的位置:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="@+id/product_title_layout"
android:layout_width="match_parent"
android:layout_height="40.0dip"
android:background="#FFFFFF" >
<TextView
android:id="@+id/product_title_detail_txtv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.0"
android:gravity="center"
android:text="圖文詳情"
style="@style/textStyle.Small.black" />
<TextView
android:id="@+id/product_title_comment_txtv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.0"
android:gravity="center"
android:text="評論"
style="@style/textStyle.Small.black" />
</LinearLayout>
<ImageView
android:id="@+id/cursor"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="matrix"
android:src="@drawable/icon_move_line" />
<android.support.v4.view.ViewPager
android:id="@+id/product_comment_vpager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1.0"
android:background="#000000"
android:flipInterval="30"
android:persistentDrawingCache="animation" />
</LinearLayout>
代碼:
private ImageView cursor;
private int bmpw = 0; // 遊標寬度
private int offset = 0;// // 動畫圖片偏移量
private int currIndex = 0;// 當前頁卡編號
ArrayList<Fragment> listFragment = new ArrayList<Fragment>();
cursor = (ImageView) view.findViewById(R.id.cursor);
mViewPager.setOffscreenPageLimit(1);
mViewPager.setAdapter(new MyFragmentPagerAdapter(fragmentManager, listFragment));//適配器
mViewPager.setOnPageChangeListener(new MyPageChangeListener());
/**
* 初始化指示器位置
*/
public void initCursorPos() {
// 初始化動畫
bmpw = BitmapFactory.decodeResource(getResources(), R.drawable.img_line_red).getWidth();// 獲取圖片寬度
DisplayMetrics dm = new DisplayMetrics();
getActivity().getWindowManager().getDefaultDisplay().getMetrics(dm);
int screenW = dm.widthPixels;// 獲取分辨率寬度
offset = (screenW / 2 - bmpw) / 2;// 計算偏移量
Matrix matrix = new Matrix();
matrix.postTranslate(offset, 0);
cursor.setImageMatrix(matrix);// 設置動畫初始位置
}
//頁面改變監聽器
public class MyPageChangeListener implements ViewPager.OnPageChangeListener {
int one = offset * 2 + bmpw;// 頁卡1 -> 頁卡2 偏移量
int two = one * 2;// 頁卡1 -> 頁卡3 偏移量
@Override
public void onPageSelected(int arg0) {
Animation animation = null;
switch (arg0) {
case 0:
fragmentFlag=0;
textTypeOne.setTextColor(getResources().getColor(R.color.color_FA4148));//紅
textTypeTwo.setTextColor(getResources().getColor(R.color.color_7e7e7e));//灰
if (currIndex == 1) {
animation = new TranslateAnimation(one, 0, 0, 0);
} else if (currIndex == 2) {
animation = new TranslateAnimation(two, 0, 0, 0);
}
break;
case 1:
fragmentFlag=1;
textTypeOne.setTextColor(getResources().getColor(R.color.color_7e7e7e));
textTypeTwo.setTextColor(getResources().getColor(R.color.color_FA4148));
if (currIndex == 0) {
animation = new TranslateAnimation(offset, one, 0, 0);
} else if (currIndex == 2) {
animation = new TranslateAnimation(two, one, 0, 0);
}
break;
case 2:
if (currIndex == 0) {
animation = new TranslateAnimation(offset, two, 0, 0);
} else if (currIndex == 1) {
animation = new TranslateAnimation(one, two, 0, 0);
}
break;
}
currIndex = arg0;
animation.setFillAfter(true);// True:圖片停在動畫結束位置
animation.setDuration(300);
cursor.startAnimation(animation);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
}
/**
* ViewPager適配器
*/
public class MyFragmentPagerAdapter extends FragmentPagerAdapter {
ArrayList<Fragment> list;
public MyFragmentPagerAdapter(FragmentManager fm, ArrayList<Fragment> list) {
super(fm);
this.list = list;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Fragment getItem(int arg0) {
return list.get(arg0);
}
}