SmileyPicker.java

package com.jasonchen.microlang.smilepicker;

import android.animation.LayoutTransition;
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.text.Editable;
import android.text.Selection;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.style.ImageSpan;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.jasonchen.microlang.R;
import com.jasonchen.microlang.utils.GlobalContext;
import com.jasonchen.microlang.utils.TimeLineUtility;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * jasonchen
 * 2015/04/10
 */
public class SmileyPicker extends LinearLayout {

	private int mPickerHeight;

	private EditText mEditText;
	private ViewPager viewPager;
	private ImageView centerPoint;
	private ImageView leftPoint;
	private ImageView rightPoint;
	private LayoutInflater mInflater;

	private Activity activity;

	private final LayoutTransition transitioner = new LayoutTransition();

	public SmileyPicker(Context paramContext) {
		super(paramContext);
	}

	public SmileyPicker(Context paramContext, AttributeSet paramAttributeSet) {
		super(paramContext, paramAttributeSet);
		this.mInflater = LayoutInflater.from(paramContext);
		View view = this.mInflater.inflate(
				R.layout.writeweiboactivity_smileypicker, null);
		viewPager = (ViewPager) view.findViewById(R.id.viewpager);
		viewPager.setAdapter(new SmileyPagerAdapter());
		leftPoint = (ImageView) view.findViewById(R.id.left_point);
		centerPoint = (ImageView) view.findViewById(R.id.center_point);
		leftPoint.getDrawable().setLevel(1);
		viewPager
				.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
					@Override
					public void onPageSelected(int position) {
						super.onPageSelected(position);
						switch (position) {
						case 0:
							leftPoint.getDrawable().setLevel(1);
							centerPoint.getDrawable().setLevel(0);
							break;
						case 1:
							leftPoint.getDrawable().setLevel(0);
							centerPoint.getDrawable().setLevel(1);
							break;
						}
					}
				});
		addView(view);
	}

	public void setEditText(Activity activity, ViewGroup rootLayout,
			EditText paramEditText) {
		this.mEditText = paramEditText;
		this.activity = activity;
		rootLayout.setLayoutTransition(transitioner);
		setupAnimations(transitioner);
	}

	public void show(Activity paramActivity, boolean showAnimation) {
		if (showAnimation) {
			transitioner.setDuration(200);
		} else {
			transitioner.setDuration(0);
		}
		this.mPickerHeight = SmileyPickerUtility
				.getKeyboardHeight(paramActivity);
		SmileyPickerUtility.hideSoftInput(this.mEditText);
		getLayoutParams().height = this.mPickerHeight;
		setVisibility(View.VISIBLE);
		// open smilepicker, press home, press app switcher to return to write
		// weibo interface,
		// softkeyboard will be opened by android system when smilepicker is
		// showing,
		// this method is used to fix this issue
		paramActivity.getWindow().setSoftInputMode(
				WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
	}

	public void hide(Activity paramActivity) {
		setVisibility(View.GONE);
		paramActivity.getWindow().setSoftInputMode(
				WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
	}

	private class SmileyPagerAdapter extends PagerAdapter {

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

		@Override
		public Object instantiateItem(ViewGroup container, int position) {

			View view = activity.getLayoutInflater().inflate(
					R.layout.smileypicker_gridview, container, false);

			GridView gridView = (GridView) view.findViewById(R.id.smiley_grid);

			gridView.setAdapter(new SmileyAdapter(activity, position));
			container.addView(view, 0, new ViewGroup.LayoutParams(
					ViewGroup.LayoutParams.MATCH_PARENT,
					ViewGroup.LayoutParams.MATCH_PARENT));

			return view;
		}

		@Override
		public void setPrimaryItem(ViewGroup container, int position,
				Object object) {
			super.setPrimaryItem(container, position, object);
		}

		@Override
		public int getCount() {
			return 2;
		}

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

	private final class SmileyAdapter extends BaseAdapter {

		private LayoutInflater mInflater;
		private List<String> keys;
		private List<String> pics;
		private Map<String, Bitmap> bitmapMap;
		private int emotionPosition;
		private int count;

		public SmileyAdapter(Context context, int emotionPosition) {
			this.emotionPosition = emotionPosition;
			this.mInflater = LayoutInflater.from(context);
			this.keys = new ArrayList<String>();
			this.pics = new ArrayList<String>();
			Set<String> keySet;
			switch (emotionPosition) {
			case SmileyMap.GENERAL_EMOTION_POSITION:
				keySet = GlobalContext.getInstance().getEmotionsPics().keySet();
				keys.addAll(keySet);
				pics.addAll(SmileyMap.getInstance().getGeneral().values());
				bitmapMap = GlobalContext.getInstance().getEmotionsPics();
				count = bitmapMap.size();
				break;
			case SmileyMap.EMOJI_EMOTION_POSITION:
				keySet = EmojiMap.getInstance().getMap().keySet();
				keys.addAll(keySet);
				bitmapMap = null;
				count = keys.size();
				break;
			case SmileyMap.HUAHUA_EMOTION_POSITION:
				keySet = GlobalContext.getInstance().getHuahuaPics().keySet();
				keys.addAll(keySet);
				pics.addAll(SmileyMap.getInstance().getHuahua().values());
				bitmapMap = GlobalContext.getInstance().getHuahuaPics();
				count = bitmapMap.size();
				break;
			default:
				throw new IllegalArgumentException(
						"emotion position is invalid");
			}
		}

		private void bindView(final int position, View contentView) {
			ImageView imageView = ((ImageView) contentView
					.findViewById(R.id.smiley_item));
			TextView textView = (TextView) contentView
					.findViewById(R.id.smiley_text_item);
			if (emotionPosition != SmileyMap.EMOJI_EMOTION_POSITION) {
				imageView.setVisibility(View.VISIBLE);
				textView.setVisibility(View.INVISIBLE);
				imageView.setImageBitmap(bitmapMap.get(keys.get(position)));
			} else {
				imageView.setVisibility(View.INVISIBLE);
				textView.setVisibility(View.VISIBLE);
				textView.setText(keys.get(position));
			}

			contentView.setOnClickListener(new OnClickListener() {
				@Override
				public void onClick(View v) {
					int index = mEditText.getSelectionStart();
					String text = keys.get(position);
					Editable edit = mEditText.getEditableText();// 获取EditText的文字
					if (index < 0 || index >= edit.length()) {
						edit.append(text);
					} else {
						edit.insert(index, text);// 光标所在位置插入文字
					}
					String content = mEditText.getText().toString();
					TimeLineUtility.addEmotions(mEditText, content);
					mEditText.setSelection(index + text.length());
					
				}
			});
		}

		public int getCount() {
			return count;
		}

		public Object getItem(int paramInt) {
			return null;
		}

		public long getItemId(int paramInt) {
			return 0L;
		}

		public View getView(int paramInt, View paramView,
				ViewGroup paramViewGroup) {
			if (paramView == null) {
				paramView = this.mInflater.inflate(
						R.layout.writeweiboactivity_smileypicker_item, null);
			}
			bindView(paramInt, paramView);
			return paramView;
		}
	}

	private void setupAnimations(LayoutTransition transition) {
		ObjectAnimator animIn = ObjectAnimator.ofFloat(null, "translationY",
				SmileyPickerUtility.getScreenHeight(this.activity),
				mPickerHeight).setDuration(
				transition.getDuration(LayoutTransition.APPEARING));
		transition.setAnimator(LayoutTransition.APPEARING, animIn);

		ObjectAnimator animOut = ObjectAnimator.ofFloat(null, "translationY",
				mPickerHeight,
				SmileyPickerUtility.getScreenHeight(this.activity))
				.setDuration(
						transition.getDuration(LayoutTransition.DISAPPEARING));
		transition.setAnimator(LayoutTransition.DISAPPEARING, animOut);
	}
}