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- public class MainActivity extends AppCompatActivity {
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- final HorizontalScrollView scrollView = (HorizontalScrollView) findViewById(R.id.scroll_view);
- final ImageView imageView = (ImageView) findViewById(R.id.background);
- final ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
- viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
- @Override
- public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
- int x = (int) ((viewPager.getWidth() * position + positionOffsetPixels) * computeFactor());
- scrollView.scrollTo(x, 0);
- }
- @Override
- public void onPageSelected(int position) {
- }
- @Override
- public void onPageScrollStateChanged(int state) {
- }
- private float computeFactor() {
- return (imageView.getWidth() - viewPager.getWidth()) /
- (float)(viewPager.getWidth() * (viewPager.getAdapter().getCount() - 1));
- }
- });
- viewPager.setAdapter(new CustomPagerAdapter(this));
- }
- }
- <?xml version="1.0" encoding="utf-8"?>
- <FrameLayout
- xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:tools="http://schemas.android.com/tools"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- tools:context=".MainActivity">
- <HorizontalScrollView
- android:id="@+id/scroll_view"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:scrollbars="none">
- <FrameLayout
- android:layout_width="wrap_content"
- android:layout_height="match_parent">
- <ImageView
- android:id="@+id/background"
- android:layout_width="1000dp"
- android:layout_height="match_parent"
- android:scaleType="centerCrop"
- android:src="@drawable/image"/>
- </FrameLayout>
- </HorizontalScrollView>
- <android.support.v4.view.ViewPager
- android:id="@+id/view_pager"
- android:layout_width="match_parent"
- android:layout_height="match_parent"/>
- </FrameLayout>
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