PreviewActivity.java

package com.mogujie.tt.ui.activity;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.mogujie.tt.R;
import com.mogujie.tt.adapter.album.ImageGridAdapter;
import com.mogujie.tt.adapter.album.ImageItem;
import com.mogujie.tt.cache.biz.CacheHub;
import com.mogujie.tt.entity.MessageInfo;
import com.mogujie.tt.imlib.service.IMService;
import com.mogujie.tt.imlib.utils.IMUIHelper;
import com.mogujie.tt.log.Logger;
import com.mogujie.tt.ui.tools.DisplayBitmapCache;
import com.mogujie.tt.ui.utils.IMServiceHelper;
import com.mogujie.tt.ui.utils.IMServiceHelper.OnIMServiceListner;
import com.mogujie.tt.widget.CustomViewPager;

/**
 * @Description 图片预览
 * @author Nana
 * @date 2014-5-9
 */
public class PreviewActivity extends Activity
		implements
			OnPageChangeListener,
			OnIMServiceListner {

	private CustomViewPager viewPager;
	private ImageView[] tips;
	private ImageView[] mImageViews;
	private ViewGroup group;
	private ImageView back;
	private ImageView select;
	private TextView send;
	private final ImageGridAdapter adapter = ImageGridActivity.getAdapter();
	private Map<Integer, Integer> removePosition = new HashMap<Integer, Integer>();
	private int curImagePosition = -1;
	private IMServiceHelper imServiceHelper = new IMServiceHelper();
	private Logger logger = Logger.getLogger(PreviewActivity.class);

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		imServiceHelper.connect(this, null, IMServiceHelper.INTENT_NO_PRIORITY, this);

		setContentView(R.layout.tt_activity_preview);
		initView();
		loadView();
	}

	private void initView() {
		viewPager = (CustomViewPager) findViewById(R.id.viewPager);
		group = (ViewGroup) findViewById(R.id.viewGroup);
		back = (ImageView) findViewById(R.id.back_btn);
		select = (ImageView) findViewById(R.id.select_btn);
		send = (TextView) findViewById(R.id.send_btn);
		setSendText(adapter.getSelectMap().size());
		send.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Iterator<Integer> iterator = removePosition.keySet().iterator();
				while (iterator.hasNext()) {
					int key = (Integer) iterator.next();
					if (adapter.getSelectMap().containsKey(key))
						adapter.getSelectMap().remove(key);
				}
				removePosition.clear();

				if (adapter.getSelectMap().size() > 0) {
					List<MessageInfo> messageList = new ArrayList<MessageInfo>();
					Iterator<Integer> iter = adapter.getSelectMap().keySet().iterator();
					while (iter.hasNext()) {
						int position = iter.next();
						ImageItem imgItem = adapter.getSelectMap().get(position);
						MessageInfo msg = ImageGridActivity.drawMessageInfo(PreviewActivity.this, imgItem);
						messageList.add(msg);
					}
					ImageGridActivity.setSendText(0);
					ImageGridActivity.setAdapterSelectedMap(null);

					IMUIHelper.SessionInfo sessionInfo = CacheHub.getInstance().getSessionInfo();
					if (sessionInfo != null) {
						logger.e("pic#sessionInfo is null");
						return;
					}

					IMService imService = imServiceHelper.getIMService();
					if (imService != null) {
						imService.getMessageManager().sendImages(sessionInfo.getSessionId(), sessionInfo.getSessionType(), messageList);
					}

					Intent data = new Intent();
					data.putExtra("finish", true);
					setResult(RESULT_OK, data);
					PreviewActivity.this.finish();
				} else {
					Toast.makeText(PreviewActivity.this, R.string.need_choose_images, Toast.LENGTH_SHORT).show();
				}
			}
		});
		back.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				@SuppressWarnings("rawtypes")
				Iterator it = removePosition.keySet().iterator();
				while (it.hasNext()) {
					int key = (Integer) it.next();
					if (adapter.getSelectMap().containsKey(key))
						adapter.getSelectMap().remove(key);
				}
				ImageGridActivity.setAdapterSelectedMap(ImageGridActivity.getAdapter().getSelectMap());
				removePosition.clear();
				PreviewActivity.this.finish();
			}
		});
		select.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				if (adapter.getSelectMap().containsKey(curImagePosition)) {
					ImageItem item = adapter.getSelectMap().get(curImagePosition);
					item.setSelected(!item.isSelected());
					if (item.isSelected()) {
						int selTotal = adapter.getSelectTotalNum();
						adapter.setSelectTotalNum(++selTotal);
						if (removePosition.containsKey(curImagePosition)) {
							removePosition.remove(curImagePosition);
						}
						ImageGridActivity.setSendText(selTotal);
						setSendText(selTotal);
						select.setImageResource(R.drawable.tt_album_img_selected);
					} else {
						int selTotal = adapter.getSelectTotalNum();
						adapter.setSelectTotalNum(--selTotal);
						removePosition.put(curImagePosition, curImagePosition);
						ImageGridActivity.setSendText(selTotal);
						setSendText(selTotal);
						select.setImageResource(R.drawable.tt_album_img_select_nor);
					}
				}
			}
		});
	}

	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();

		imServiceHelper.disconnect(this);
	}

	private void setSendText(int selTotal) {
		if (selTotal > 0) {
			send.setText(getResources().getString(R.string.send) + "("
					+ selTotal + ")");
		} else {
			send.setText(getResources().getString(R.string.send));
		}
	}

	private void loadView() {
		mImageViews = new ImageView[adapter.getSelectMap().size()];

		if (adapter.getSelectMap().size() > 1) {
			tips = new ImageView[adapter.getSelectMap().size()];
			for (int i = 0; i < tips.length; i++) {
				ImageView imageView = new ImageView(this);
				imageView.setLayoutParams(new LayoutParams(10, 10));
				tips[i] = imageView;
				if (i == 0) {
					tips[i].setBackgroundResource(R.drawable.tt_default_dot_down);
				} else {
					tips[i].setBackgroundResource(R.drawable.tt_default_dot_up);
				}
				LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
				layoutParams.leftMargin = 5;
				layoutParams.rightMargin = 5;
				group.addView(imageView, layoutParams);
			}
		}

		Iterator<?> it = adapter.getSelectMap().keySet().iterator();
		int index = -1;
		while (it.hasNext()) {
			int key = (Integer) it.next();
			ImageItem item = adapter.getSelectMap().get(key);
			ImageView imageView = new ImageView(this);
			mImageViews[++index] = imageView;
			Bitmap bmp = DisplayBitmapCache.getInstance(PreviewActivity.this).get(item.getImagePath());
			if (bmp == null)
				bmp = DisplayBitmapCache.getInstance(PreviewActivity.this).get(item.getThumbnailPath());
			if (bmp != null)
				imageView.setImageBitmap(bmp);
			if (index == 0) {
				curImagePosition = key;
			}
		}

		// 设置view pager
		viewPager.setAdapter(new PreviewAdapter());
		viewPager.setOnPageChangeListener(this);
		if (adapter.getSelectMap().size() == 1) {
			viewPager.setScanScroll(false);
		} else {
			viewPager.setScanScroll(true);
		}
		viewPager.setCurrentItem(0);
	}

	@Override
	public void onPageScrollStateChanged(int arg0) {
	}

	@Override
	public void onPageScrolled(int arg0, float arg1, int arg2) {

	}

	private void setImageBackground(int selectItems) {
		for (int i = 0; i < tips.length; i++) {
			if (i == selectItems) {
				tips[i].setBackgroundResource(R.drawable.tt_default_dot_down);
			} else {
				tips[i].setBackgroundResource(R.drawable.tt_default_dot_up);
			}
		}
	}

	@Override
	public void onPageSelected(int position) {
		@SuppressWarnings("rawtypes")
		Iterator it = adapter.getSelectMap().keySet().iterator();
		int index = -1;
		while (it.hasNext()) {
			int key = (Integer) it.next();
			if (++index == position) {
				curImagePosition = key;// 对应适配器中图片列表的真实位置
				if (adapter.getSelectMap().get(key).isSelected()) {
					select.setImageResource(R.drawable.tt_album_img_selected);
				} else {
					select.setImageResource(R.drawable.tt_album_img_select_nor);
				}
			}
		}
		setImageBackground(position);
	}

	public class PreviewAdapter extends PagerAdapter {

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

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

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

		@Override
		public Object instantiateItem(View container, int position) {
			try {
				((ViewGroup) container).addView(mImageViews[position]);
			} catch (Exception e) {
			}
			return mImageViews[position];
		}
	}

	@Override
	public void onAction(String action, Intent intent,
			BroadcastReceiver broadcastReceiver) {
		// TODO Auto-generated method stub

	}

	@Override
	public void onIMServiceConnected() {
		// TODO Auto-generated method stub

	}
}