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GitHub之PhotoView使用

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PhotoView使用在ViewPager中
GitHub地址：https://github.com/chrisbanes/PhotoView

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<com.android.xiaomolongstudio.danhuaer.view.HackyViewPager
       android:id="@+id/viewPager"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:layout_above="@id/ad_layout" />

HackyViewPager.java

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public class HackyViewPager extends ViewPager {
	private boolean isLocked;
	
    public HackyViewPager(Context context) {
        super(context);
        isLocked = false;
    }
    public HackyViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
        isLocked = false;
    }
    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
    	if (!isLocked) {
	        try {
	            return super.onInterceptTouchEvent(ev);
	        } catch (IllegalArgumentException e) {
	            e.printStackTrace();
	            return false;
	        }
    	}
    	return false;
    }
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return !isLocked && super.onTouchEvent(event);
    }
    
	public void toggleLock() {
		isLocked = !isLocked;
	}
	public void setLocked(boolean isLocked) {
		this.isLocked = isLocked;
	}
	public boolean isLocked() {
		return isLocked;
	}
	
}

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ViewPager mViewPager;
mViewPager.setPageTransformer(true, new CardTransformer(0.8f));
       mViewPager.setOffscreenPageLimit(2);
       mViewPager.setAdapter(new ImageAdapter());
       mViewPager.setCurrentItem(position);

CardTransformer

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/**
   * Awesome Launcher-inspired page transformer
   */
  private static class CardTransformer implements ViewPager.PageTransformer {
      private final float scaleAmount;
      public CardTransformer(float scalingStart) {
          scaleAmount = 1 - scalingStart;
      }
      @Override
      public void transformPage(View page, float position) {
          if (position >= 0f) {
              final int w = page.getWidth();
              float scaleFactor = 1 - scaleAmount * position;
              page.setAlpha(1f - position);
              page.setScaleX(scaleFactor);
              page.setScaleY(scaleFactor);
              page.setTranslationX(w * (1 - position) - w);
          }
      }
  }

ImageAdapter

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private class ImageAdapter extends PagerAdapter {
       @Override
       public Object instantiateItem(ViewGroup container, int position) {
           final String imageUrl = mHrefData.get(position);
           final View view = LayoutInflater.from(EmotionImageDetailActivity.this).inflate(R.layout.emotion_image_detail_item, container, false);
           final ProgressBar progressBar = (ProgressBar) view.findViewById(R.id.progressBar);
           final TextView introduction = (TextView) view.findViewById(R.id.introduction);
           introduction.setText(mIntroductionDataData.get(position));
           final PhotoView imageView = (PhotoView) view.findViewById(R.id.imageView);                
           Picasso.with(EmotionImageDetailActivity.this).load(imageUrl)
                   .into(imageView, new Callback() {
                       @Override
                       public void onSuccess() {
                           progressBar.setVisibility(View.GONE);
                       }
                       @Override
                       public void onError() {
                           progressBar.setVisibility(View.GONE);
                       }
                   });
           container.addView(view, ViewGroup.LayoutParams.MATCH_PARENT,
                   ViewGroup.LayoutParams.MATCH_PARENT);
           return view;
       }
       @Override
       public void destroyItem(ViewGroup container, int position, Object object) {
           container.removeView((View) object);
       }
       @Override
       public int getCount() {
           return mHrefData != null ? mHrefData.size() : 0;
       }
       @Override
       public boolean isViewFromObject(View view, Object object) {
           return view == object;
       }
   }

emotion_image_detail_item.xml

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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/black">
    <uk.co.senab.photoview.PhotoView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_centerInParent="true" />
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_alignParentBottom="true">
        <TextView
            android:id="@+id/introduction"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="top"
            android:padding="10dp"
            android:textColor="@color/white"
            android:textSize="@dimen/text_content" />
    </ScrollView>
    <ProgressBar
        android:id="@+id/progressBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" />
</RelativeLayout>



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