java - ImageView 填充空白 ViewPager Android

Question

我一直在学习本教程 Image Slide Using View Pager但我无法使图像 View inside view pager 在水平和垂直方向上填充 view pager 内的完整空间。知道如何做到这一点吗？

我已经在我的页面适配器中尝试过这个

mImageView.setAdjustViewBounds(true);
mImageView.setScaleType(ImageView.ScaleType.FIT_CENTER);

但仍然没有运气:(

我的布局

<RelativeLayout 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"
android:padding="2dp"
tools:context=".MainActivity" >

<RelativeLayout
    android:id="@+id/img_slideshow_layout"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="5dp"
    android:background="@drawable/img_border" >

    <android.support.v4.view.ViewPager
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="150dp" />

    <TextView
        android:id="@+id/img_name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/indicator"
        android:background="#88343434"
        android:ellipsize="end"
        android:paddingBottom="2dp"
        android:paddingLeft="5dp"
        android:paddingRight="2dp"
        android:paddingTop="2dp"
        android:singleLine="true"
        android:textColor="#ededed" />

    <apps.modisku.com.modisku.helper.CirclePageIndicator
        android:id="@+id/indicator"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/view_pager"
        android:padding="10dip" />
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
android:padding="3dp" >

<ImageView
    android:id="@+id/image_display"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:contentDescription="@string/txt_image_slider" />

   </RelativeLayout>

我的 PageAdapter

public class ImageSlideAdapter extends PagerAdapter {
    ImageLoader imageLoader = ImageLoader.getInstance();
    DisplayImageOptions options;
    private ImageLoadingListener imageListener;
    FragmentActivity activity;
    List<Product> products;
    HomeFragment homeFragment;

    public ImageSlideAdapter(FragmentActivity activity, List<Product> products,
                             HomeFragment homeFragment) {
        this.activity = activity;
        this.homeFragment = homeFragment;
        this.products = products;
        options = new DisplayImageOptions.Builder()
                .showImageOnFail(R.drawable.ic_error)
                .showStubImage(R.drawable.ic_launcher)
                .showImageForEmptyUri(R.drawable.ic_empty).cacheInMemory()
                .cacheOnDisc().showImageOnLoading(R.drawable.loadingicontransprant).build();

        imageListener = new ImageDisplayListener();
    }

    @Override
    public int getCount() {
        return products.size();
    }

    @Override
    public View instantiateItem(ViewGroup container, final int position) {
        LayoutInflater inflater = (LayoutInflater) activity
                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.vp_image, container, false);

        ImageView mImageView = (ImageView) view
                .findViewById(R.id.image_display);


       // mImageView.setLayoutParams(new ViewGroup.LayoutParams(mScreenWidth, ViewGroup.LayoutParams.WRAP_CONTENT));
        mImageView.setAdjustViewBounds(true);
        mImageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
        mImageView.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Bundle arguments = new Bundle();
                Fragment fragment = null;
                Log.d("position adapter", "" + position);
                Product product = (Product) products.get(position);
                arguments.putParcelable("singleProduct", product);

                // Start a new fragment
                fragment = new ProductDetailFragment();
                fragment.setArguments(arguments);

                FragmentTransaction transaction = activity
                        .getSupportFragmentManager().beginTransaction();
                transaction.replace(R.id.promofragment, fragment,
                        ProductDetailFragment.ARG_ITEM_ID);
                transaction.addToBackStack(ProductDetailFragment.ARG_ITEM_ID);
                transaction.commit();
            }
        });
        imageLoader.displayImage(
                ((Product) products.get(position)).getImageURL(), mImageView,
                options, imageListener);
        container.addView(view);
        return view;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View) object);
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == object;
    }

    private static class ImageDisplayListener extends SimpleImageLoadingListener {

        static final List<String> displayedImages = Collections
                .synchronizedList(new LinkedList<String>());

        @Override
        public void onLoadingComplete(String imageUri, View view,
                                      Bitmap loadedImage) {
            if (loadedImage != null) {
                ImageView imageView = (ImageView) view;
                boolean firstDisplay = !displayedImages.contains(imageUri);
                if (firstDisplay) {
                    FadeInBitmapDisplayer.animate(imageView, 500);
                    displayedImages.add(imageUri);
                 }
               }
           }
        }
    }

Answer 1

    Use FrameLayout instead of RelativeLayout

    <?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">

    <ImageView
        android:id="@+id/image_display"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitXY"
        android:contentDescription="@string/txt_image_slider" />

       </FrameLayout>