cdzApp/app/src/main/java/com/electric/chargingpile/fragment/ChatPhotoFragment.java

package com.electric.chargingpile.fragment;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.electric.chargingpile.R;
import com.github.chrisbanes.photoview.PhotoView;

public class ChatPhotoFragment extends Fragment {
    private static final String TAG = "ChatPhotoFragment";
    private static final String ARG_URL = "url";

    public static ChatPhotoFragment newInstance(String url) {
        ChatPhotoFragment fragment = new ChatPhotoFragment();
        Bundle args = new Bundle();
        args.putString(ARG_URL, url);
        fragment.setArguments(args);
        return fragment;
    }

    public ChatPhotoFragment() {
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        String url = getArguments().getString(ARG_URL);
        View rootView = inflater.inflate(R.layout.fragment_chat_photo, container, false);
        initView(rootView, url);
        return rootView;
    }

    private void initView(View rootView,String url) {
        final PhotoView photoView = rootView.findViewById(R.id.photoView);
        photoView.setImageResource(R.drawable.bg_guide_one);
//        photoView.setScaleType(ImageView.ScaleType.FIT_XY);
        photoView.setOnDoubleTapListener(new GestureDetector.OnDoubleTapListener() {
            @Override
            public boolean onSingleTapConfirmed(MotionEvent motionEvent) {
                return false;
            }

            @Override
            public boolean onDoubleTap(MotionEvent motionEvent) {
                if (photoView.getScaleType() == ImageView.ScaleType.FIT_CENTER) {
                    photoView.setScaleType(ImageView.ScaleType.FIT_START);
                }
                Log.d(TAG, "onDoubleTap: " + photoView.getScaleType());
                return false;
            }

            @Override
            public boolean onDoubleTapEvent(MotionEvent motionEvent) {

                return false;
            }
        });
    }
}