TitlePop.java

package com.diandi.demo.widget.dialog;

import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;

import com.diandi.demo.R;
import com.diandi.demo.util.ScreenUtils;

import java.util.ArrayList;

/**
 * *******************************************************************************
 * *********    Author : klob(kloblic@gmail.com) .
 * *********    Date : 2014-11-29  .
 * *********    Time : 11:46 .
 * *********    Project name : Diandi1.18 .
 * *********    Version : 1.0
 * *********    Copyright @ 2014, klob, All Rights Reserved
 * *******************************************************************************
 */


public class TitlePop extends PopupWindow {
    //列表弹窗间隔
    private final int LIST_PADDING = 10;
    //坐标位置
    private final int[] mLocation = new int[2];
    private Context mContext;
    //实例化一个矩形
    private Rect mRect = new Rect();
    //屏幕的宽度和高度
    private int mScreenWidth, mScreenHeight;

    //判断弹窗是否需要添加或更新列表子项
    private boolean mIsDirty;

    //位置不再中心
    private int mPopGravity = Gravity.NO_GRAVITY;

    //定义列表对象
    private ListView mListView;

    //定义弹窗列表子项
    private ArrayList<ActionItem> mActionItems = new ArrayList<ActionItem>();

    //列表子项监听
    private OnItemOnClickListener mOnItemClickListener;

    public TitlePop(Context context) {
        this(context, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    }

    @SuppressWarnings("deprecation")
    public TitlePop(Context context, int width, int height) {
        this.mContext = context;

        //设置可以获得焦点
        setFocusable(true);
        //设置窗内可点击
        setTouchable(true);
        //设置窗外可点击
        setOutsideTouchable(true);

        //获取屏幕宽度和高度
        mScreenWidth = ScreenUtils.getScreenWidth(mContext);
        mScreenHeight = ScreenUtils.getScreenHeight(mContext);

        //设置弹窗宽度和高度
        setWidth(width);
        setHeight(height);

        setBackgroundDrawable(new BitmapDrawable());

        setContentView(LayoutInflater.from(mContext).inflate(R.layout.title_popup, null));

        initUI();


    }

    private void initUI() {
        mListView = (ListView) getContentView().findViewById(R.id.title_list);
        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                dismiss();
                if (mOnItemClickListener != null)
                    mOnItemClickListener.onItemClick(mActionItems.get(i), i);
            }
        });
        this.setAnimationStyle(R.style.AnimationPreview);
    }


    /**
     * 显示弹窗列表界面
     */
    public void show(View view) {
        // 获得点击屏幕的位置坐标
        view.getLocationOnScreen(mLocation);

        // 设置矩形的大小
        mRect.set(mLocation[0], mLocation[1], mLocation[0] + view.getWidth(),
                mLocation[1] + view.getHeight());

        // 判断是否需要添加或更新列表子类项
        if (mIsDirty) {
            populateActions();
        }

        // 显示弹窗的位置
        showAtLocation(view, mPopGravity, mScreenWidth - LIST_PADDING
                - (getWidth() / 2), mRect.bottom);
    }

    /**
     * 设置弹窗列表子项
     */
    private void populateActions() {
        mIsDirty = false;

        // 设置列表的适配器
        mListView.setAdapter(new BaseAdapter() {
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                TextView textView = null;

                if (convertView == null) {
                    textView = new TextView(mContext);
                    textView.setTextColor(mContext.getResources().getColor(
                            android.R.color.white));
                    textView.setTextSize(14);
                    // 设置文本居中
                    textView.setGravity(Gravity.CENTER);
                    // 设置文本域的范围
                    textView.setPadding(0, 10, 0, 10);
                    // 设置文本在一行内显示（不换行）
                    textView.setSingleLine(true);
                } else {
                    textView = (TextView) convertView;
                }

                ActionItem item = mActionItems.get(position);

                // 设置文本文字
                textView.setText(item.mTitle);
                // 设置文字与图标的间隔
                textView.setCompoundDrawablePadding(10);
                // 设置在文字的左边放一个图标
                textView.setCompoundDrawablesWithIntrinsicBounds(
                        item.mDrawable, null, null, null);

                return textView;
            }

            @Override
            public long getItemId(int position) {
                return position;
            }

            @Override
            public Object getItem(int position) {
                return mActionItems.get(position);
            }

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

    /**
     * 添加子类项
     */
    public void addAction(ActionItem action) {
        if (action != null) {
            mActionItems.add(action);
            mIsDirty = true;
        }
    }

    /**
     * 清除子类项
     */
    public void cleanAction() {
        if (mActionItems.isEmpty()) {
            mActionItems.clear();
            mIsDirty = true;
        }
    }

    /**
     * 根据位置得到子类项
     */
    public ActionItem getAction(int position) {
        if (position < 0 || position > mActionItems.size())
            return null;
        return mActionItems.get(position);
    }

    /**
     * 设置监听事件
     */
    public void setItemOnClickListener(
            OnItemOnClickListener onItemOnClickListener) {
        this.mOnItemClickListener = onItemOnClickListener;
    }


    public static interface OnItemOnClickListener {
        public void onItemClick(ActionItem item, int position);

    }

}