us.opcam.camera.activity.URLImagePagerActivity.java Source code

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Here is the source code for us.opcam.camera.activity.URLImagePagerActivity.java

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/*******************************************************************************
 * Copyright 2011-2013 Sergey Tarasevich
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package us.opcam.camera.activity;

import java.util.ArrayList;

import us.opcam.camera.R;
import us.opcam.camera.util.Constants;
import us.opcam.camera.util.Constants.Extra;
import us.opcam.camera.util.SPUtil;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.Menu;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;
import com.nostra13.universalimageloader.core.listener.ImageLoadingProgressListener;
import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener;

/**
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 */
public class URLImagePagerActivity extends SherlockActivity {

    protected ImageLoader imageLoader = ImageLoader.getInstance();
    private static final String STATE_POSITION = "STATE_POSITION";
    DisplayImageOptions options;

    ViewPager pager;
    ArrayList<String> imagesAuthor = null;
    ArrayList<String> imagesCreateDate = null;

    private boolean bThisPicMine = false; // ? ? ? ?
    private int pagerPosition = -1; //  ? ?

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        if (bThisPicMine) // ? ?  ? 
        {
            menu.add("Delete").setIcon(R.drawable.icon_delete)
                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
        }

        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.discover_image_pager);

        Bundle bundle = getIntent().getExtras();
        assert bundle != null;

        // intent  bundle?  .
        String[] imageUrls = bundle.getStringArray(Extra.IMAGES);
        imagesAuthor = bundle.getStringArrayList(Extra.IMAGES_AUTHOR);
        imagesCreateDate = bundle.getStringArrayList(Extra.IMAGES_CREATE_DATE);
        pagerPosition = bundle.getInt(Extra.IMAGE_POSITION, 0); // ? ? ?

        if (savedInstanceState != null) {
            pagerPosition = savedInstanceState.getInt(STATE_POSITION);
        }

        if (imageUrls == null)
            finish();

        options = new DisplayImageOptions.Builder().showImageForEmptyUri(R.drawable.ic_empty)
                .showImageOnFail(R.drawable.ic_error).resetViewBeforeLoading(true).cacheOnDisk(true)
                .imageScaleType(ImageScaleType.EXACTLY).bitmapConfig(Bitmap.Config.RGB_565).considerExifParams(true)
                .displayer(new FadeInBitmapDisplayer(300)).build();

        // ?  ? pager? ?  ?? .
        pager = (ViewPager) findViewById(R.id.pager);
        pager.setAdapter(new ImagePagerAdapter(imageUrls, imagesAuthor, imagesCreateDate));
        pager.setCurrentItem(pagerPosition);
        OnPageChangeListener mPageChangeListener = new OnPageChangeListener() {
            @Override
            public void onPageScrollStateChanged(int arg0) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onPageSelected(int pos) {
                CheckImageAuthorAndRefreshOptionsMenu(pos);
            }

        };
        pager.setOnPageChangeListener(mPageChangeListener);
        CheckImageAuthorAndRefreshOptionsMenu(pagerPosition); // ? create  ? ?.
    }

    private void CheckImageAuthorAndRefreshOptionsMenu(int pos) {
        String nick = SPUtil.getString(getApplicationContext(), Constants.Extra.MY_NICK);
        if (imagesAuthor.get(pos).equals(nick)) // ? ?  ??...
            bThisPicMine = true;
        else
            bThisPicMine = false;

        invalidateOptionsMenu();
    }

    @Override
    public boolean onOptionsItemSelected(com.actionbarsherlock.view.MenuItem item) {
        //Toast.makeText(this, "Got click: " + item.toString(), Toast.LENGTH_SHORT).show();

        AlertDialog.Builder alert_confirm = new AlertDialog.Builder(this);
        alert_confirm.setMessage("Are you delete this picture?").setCancelable(false)
                .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // 'YES'
                        Intent intent = getIntent();
                        intent.putExtra(Constants.Extra.DEL_POS_SERVER, pagerPosition);
                        setResult(RESULT_OK, intent);
                        finish();
                    }
                }).setNegativeButton("No", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // 'No'
                        return;
                    }
                });
        AlertDialog alert = alert_confirm.create();
        alert.show();

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        outState.putInt(STATE_POSITION, pager.getCurrentItem());
    }

    private class ImagePagerAdapter extends PagerAdapter {

        private String[] images;
        private ArrayList<String> arrName;
        private ArrayList<String> arrDate;

        private LayoutInflater inflater;

        ImagePagerAdapter(String[] images, ArrayList<String> arrNames, ArrayList<String> arrDate) {
            this.images = images;
            this.arrName = arrNames;
            this.arrDate = arrDate;
            inflater = getLayoutInflater();
        }

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

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

        @Override
        public Object instantiateItem(ViewGroup view, int position) {
            View imageLayout = inflater.inflate(R.layout.item_discover_pager, view, false);
            assert (imageLayout != null);

            ImageView imageView = (ImageView) imageLayout.findViewById(R.id.image);
            TextView txtName = (TextView) imageLayout.findViewById(R.id.txt_name);
            TextView txtDate = (TextView) imageLayout.findViewById(R.id.txt_date);
            final TextView txtLoading = (TextView) imageLayout.findViewById(R.id.txt_loading);
            final ProgressBar progress = (ProgressBar) imageLayout.findViewById(R.id.loading);

            txtName.setText(arrName.get(position)); // ? ? ?  ?.
            txtDate.setText(arrDate.get(position));

            imageLoader.displayImage(images[position], imageView, options, new SimpleImageLoadingListener() {
                @Override
                public void onLoadingStarted(String imageUri, View view) {
                    progress.setVisibility(View.VISIBLE);
                    txtLoading.setVisibility(View.VISIBLE);
                }

                @Override
                public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
                    String message = null;
                    switch (failReason.getType()) {
                    case IO_ERROR:
                        message = "Input/Output error";
                        break;
                    case DECODING_ERROR:
                        message = "Image can't be decoded";
                        break;
                    case NETWORK_DENIED:
                        message = "Downloads are denied";
                        break;
                    case OUT_OF_MEMORY:
                        message = "Out Of Memory error";
                        break;
                    case UNKNOWN:
                        message = "Unknown error";
                        break;
                    }
                    Toast.makeText(URLImagePagerActivity.this, message, Toast.LENGTH_SHORT).show();

                    progress.setVisibility(View.GONE);
                }

                @Override
                public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
                    progress.setVisibility(View.GONE);
                    txtLoading.setVisibility(View.GONE);
                }
            }, new ImageLoadingProgressListener() {
                @Override
                public void onProgressUpdate(String imageUri, View view, int current, int total) {
                    double lfProgressPrecent = 100.0f * current / total;
                    progress.setProgress((int) Math.round(lfProgressPrecent));
                    txtLoading.setText(lfProgressPrecent + "%");
                }
            });

            view.addView(imageLayout, 0);
            return imageLayout;
        }

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

        @Override
        public void restoreState(Parcelable state, ClassLoader loader) {
        }

        @Override
        public Parcelable saveState() {
            return null;
        }
    }
}