android - Androidのビューページャー内で画像をズームする

Question

こんにちは、アイテムをクリックすると画像がビューページャーに表示されているときに画像のグリッドビューがあります。これは正常に機能していますが、ページャーで画像をズーム可能にする必要があります。ここに私のコードがあります

ImageAdapter.java

    import com.netvariant.qareeboon.android.R;

    import android.content.Context;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.BaseAdapter;
    import android.widget.ImageView;

    public class ImageAdapter extends BaseAdapter {
        private Context mContext;

        public ImageAdapter(Context c) {
            mContext = c;
        }

        public int getCount() {
            return mThumbIds.length;
        }

        public Object getItem(int position) {
            return mThumbIds[position];
        }

        public long getItemId(int position) {
            return 0;
        }

        // Create a new ImageView for each item referenced by the Adapter
        public View getView(int position, View convertView, ViewGroup parent) {
            ImageView imageView;
            if (convertView == null) {  // If it's not recycled, initialize some attributes
                imageView = new ImageView(mContext);
                imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            } else {
                imageView = (ImageView) convertView;
            }

            imageView.setImageResource(mThumbIds[position]);
            return imageView;
        }


        // References to our images in res > drawable
        public Integer[] mThumbIds = {
                R.drawable.bg_logo, R.drawable.three,
                R.drawable.four, R.drawable.two,
                R.drawable.one, R.drawable.btn_about,

        };
    }

ImagePagerAdapter.java

import java.util.List;

import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

public class ImagePagerAdapter extends PagerAdapter {

    private List<ImageView> images;

    public ImagePagerAdapter(List<ImageView> images) {
        this.images = images;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        ImageView imageView = images.get(position);
        container.addView(imageView);
        return imageView;
    }

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

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

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

ImageViewPager.java

package com.netvariant.android.qareeboon;

import java.util.ArrayList;
import java.util.List;

import com.netvariant.qareeboon.android.R;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.widget.ImageView;

public class ImageViewPager extends Activity {
    // Declare Variable
    int position;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Set title for the ViewPager
        setTitle("ViewPager");
        // Get the view from view_pager.xml
        setContentView(R.layout.view_pager);

        // Retrieve data from MainActivity on item click event
        Intent p = getIntent();
        position = p.getExtras().getInt("id");

        ImageAdapter imageAdapter = new ImageAdapter(this);
        List<ImageView> images = new ArrayList<ImageView>();

        // Retrieve all the images
        for (int i = 0; i < imageAdapter.getCount(); i++) {
            ImageView imageView = new ImageView(this);
            imageView.setImageResource(imageAdapter.mThumbIds[i]);
            imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
            images.add(imageView);
        }

        // Set the images into ViewPager
        ImagePagerAdapter pageradapter = new ImagePagerAdapter(images);
        ViewPager viewpager = (ViewPager) findViewById(R.id.pager);
        viewpager.setAdapter(pageradapter);
        // Show images following the position
        viewpager.setCurrentItem(position);
    }
}

メインアクティビティ.java

package com.netvariant.android.qareeboon;
import com.netvariant.qareeboon.android.R;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.view.View;

public class InfoGraphicActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Set title for the GridView
        setTitle("GridView");
        // Get the view from grid_view.xml
        setContentView(R.layout.grid_view);

        // Set the images from ImageAdapter.java to GridView
        GridView gridview = (GridView) findViewById(R.id.gridview);
       // ViewPager viewPager =(ViewPager)findViewById(R.id.pager);
        gridview.setAdapter(new ImageAdapter(this));

        // Listening to GridView item click
        gridview.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View v, int position, long id) {

                // Launch ImageViewPager.java on selecting GridView Item
                Intent i = new Intent(getApplicationContext(), ImageViewPager.class);

                // Send the click position to ImageViewPager.java using intent
                i.putExtra("id", position);

                // Start ImageViewPager
                startActivity(i);
            }
        });
    }

    // Not using options menu for this tutorial
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.info_graphic, menu);
        return true;
    }
}