Android使用ViewPager+PhotoView实现图片查看器

可实现功能效果说明：

　　可实现多张图片点击放大，手指控制，左右滑动，多张图片点击任意位置定位显示任意位置图片；无动画，可自己加

效果图：

                           

核心代码：

viewpager:

public class PhotoViewPager extends ViewPager {
    public PhotoViewPager(Context context) {
        super(context);
    }

    public PhotoViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        try {
            return super.onInterceptTouchEvent(ev);
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
            return false;
        }
    }
}

adapter:

public class MyImageAdapter extends PagerAdapter {
    public static final String TAG = MyImageAdapter.class.getSimpleName();
    private List<String> imageUrls;
    private AppCompatActivity activity;

    public MyImageAdapter(List<String> imageUrls, AppCompatActivity activity) {
        this.imageUrls = imageUrls;
        this.activity = activity;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        String url = imageUrls.get(position);
        PhotoView photoView = new PhotoView(activity);
        Picasso.with(activity)
                .load(url)
                .into(photoView);
        container.addView(photoView);
        photoView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Log.d(TAG, "onClick: ");
                activity.finish();
            }
        });
        return photoView;
    }

    @Override
    public int getCount() {
        return imageUrls != null ? imageUrls.size() : 0;
    }

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

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

    @Override
    public int getItemPosition(Object object) {
        return POSITION_NONE;
    }
}

photoViewActivity

public class PhotoViewActivity extends AppCompatActivity implements View.OnClickListener {

    public static final String TAG = PhotoViewActivity.class.getSimpleName();
    private PhotoViewPager mViewPager;
    private int currentPosition;
    private MyImageAdapter adapter;
    private TextView mTvImageCount;
    private TextView mTvSaveImage;
    private List<String> Urls;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_photo_view);
        initView();
        initData();
    }

    private void initView() {
        mViewPager = (PhotoViewPager) findViewById(R.id.view_pager_photo);
        mTvImageCount = (TextView) findViewById(R.id.tv_image_count);
        mTvSaveImage = (TextView) findViewById(R.id.tv_save_image_photo);
        mTvSaveImage.setOnClickListener(this);

    }

    private void initData() {

        Intent intent = getIntent();
        currentPosition = intent.getIntExtra("currentPosition", 0);
        HomeQuestionListModel.DataBeanX DataBean = ((HomeQuestionListModel.DataBeanX) intent.getSerializableExtra("questionlistdataBean"));
        Urls = DataBean.getAttach().getImage().getOri();

        adapter = new MyImageAdapter(Urls, this);
        mViewPager.setAdapter(adapter);
        mViewPager.setCurrentItem(currentPosition, false);
        mTvImageCount.setText(currentPosition+1 + "/" + Urls.size());
        mViewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
            @Override
            public void onPageSelected(int position) {
                super.onPageSelected(position);
                currentPosition = position;
                mTvImageCount.setText(currentPosition + 1 + "/" + Urls.size());
            }
        });
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.tv_save_image_photo:
　　　　　　　　　　//save image
                break;
        }
    }
}

图片列表页面跳转：

private void statPhotoViewActivity(int position) {
        Intent intent = new Intent(this, PhotoViewActivity.class);
        Bundle bundle = new Bundle();
        bundle.putSerializable("dataBean", mData);
        intent.putExtras(bundle);
        intent.putExtra("currentPosition", position);
        startActivity(intent);
    }

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