我有一个包含viewPager的屏幕。 viewPager中的项目包含一个videoView持有者，其中包含该视频的缩略图。当用户点击该缩略图时，它将在另一个屏幕中打开视频。我的问题是我实现了viewPager，但它没有显示具有单独布局的项目。它显示了指示器和它的滑动，但我看不到该项目。
这是我的ViewHolder：
public class PaidProgramVideoViewHolder extends RecyclerView.ViewHolder implements ViewPager.OnPageChangeListener {
private static final int INDICATOR_MARGIN = 5;
ViewPager mProScreenpager;
LinearLayout mpageIndicator;
VideoScreenCarousal mAdapter;
Context context;
private ImageView[] pageIndicatorItems;
public PaidProgramVideoViewHolder(View itemView,Context context) {
super(itemView);
this.context = context;
setupUI(itemView, context);
setPager(itemView);
setScreenAdapter();
setPagerChangeListener();
}
private void setPagerChangeListener() {
mProScreenpager.addOnPageChangeListener(this);
}
private void setScreenAdapter() {
int[] pro_screens_image = {R.drawable.anoop_core, R.drawable.anoop_core};
mAdapter = new PaidProgramVideoViewHolder.VideoScreenCarousal(pro_screens_image, context);
setupPageIndicator(pro_screens_image.length);
mProScreenpager.setAdapter(mAdapter);
}
//Setting page indicator dots with trainer list size and setting first indicator active
private void setupPageIndicator(int size) {
mpageIndicator.removeAllViews();
pageIndicatorItems = new ImageView[size];
for (int i = 0; i < size; i++) {
pageIndicatorItems[i] = new ImageView(context);
pageIndicatorItems[i].setImageDrawable(ContextCompat.getDrawable(context, R.drawable.dot_inactive));
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT
);
params.setMargins(INDICATOR_MARGIN, 0, INDICATOR_MARGIN, 0);
mpageIndicator.addView(pageIndicatorItems[i], params);
setActiveIndicator(0);
}
}
private void setActiveIndicator(int position) {
pageIndicatorItems[position].setImageDrawable(ContextCompat.getDrawable(context, R.drawable.dot_active));
}
private void resetIndicators() {
for (int i = 0; i < 2; i++) {
pageIndicatorItems[i].setImageDrawable(ContextCompat.getDrawable(context, R.drawable.dot_inactive));
}
}
private void setupUI(View itemView, Context context) {
mpageIndicator = (LinearLayout) itemView.findViewById(R.id.carouselPageIndicator);
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
resetIndicators();
setActiveIndicator(position);
}
@Override
public void onPageScrollStateChanged(int state) {
}
private void setPager(View view) {
PagerContainer container = (PagerContainer) view.findViewById(R.id.pager_container_video);
mProScreenpager = container.getViewPager();
mProScreenpager.setClipChildren(false);
//
mProScreenpager.setOffscreenPageLimit(15);
// Disable clip to padding
mProScreenpager.setClipToPadding(false);
// set padding manually, the more you set the padding the more you see of prev & next page
mProScreenpager.setPadding(15, 0, 55, 0);
// sets a margin b/w individual pages to ensure that there is a gap b/w them
mProScreenpager.setPageMargin(20);
mProScreenpager.setPageTransformer(false, new ViewPager.PageTransformer() {
private static final float MIN_SCALE = 0.80f;
@Override
public void transformPage(View view, float position) {
final float normalizedposition = Math.abs(Math.abs(position) - 1);
view.setScaleY(Math.max(MIN_SCALE, normalizedposition / 2 + 0.5f));
view.setPivotY((float) view.getHeight());
}
});
Log.d("###", "pager1 width:" + 150 * context.getResources().getDisplayMetrics().density);
}
private class VideoScreenCarousal extends PagerAdapter{
int[] mScreenImages;
Context context;
public VideoScreenCarousal(int[] objectToReturn, Context context){
this.mScreenImages=objectToReturn;
this.context= context;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
View view = LayoutInflater.from(context).inflate(R.layout.video_container_pro_screen, null);
final ImageView imageView = (ImageView) view.findViewById(R.id.thumbnailView);
container.addView(view);
imageView.setImageResource(mScreenImages[position]);
return view;
}
@Override
public int getCount() {
return mScreenImages.length;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return false;
}
@Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View)object);
}
}
}
这是我的列表项布局：
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/black">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/thumbnailView"
android:layout_width="match_parent"
android:layout_height="170dp"
android:layout_gravity="center"
android:scaleType="centerCrop"/>
<android.support.v7.widget.AppCompatImageView
android:id="@+id/youtubePlayBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@null"
android:gravity="center_vertical"
app:srcCompat="@drawable/icon_play_white"/>
</FrameLayout>
</android.support.constraint.ConstraintLayout>
谁能告诉我我做错了什么？