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Cocos2D-Android-1之源码详解:1.Cocos2D

/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License...

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * 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 org.cocos2d;

import java.text.Collator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.ListActivity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class Cocos2D extends ListActivity {//这个类用了ListActivity 

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState); //继承 ListActivity 的 onCreate方法     //以下是设置list里的适配器
        setListAdapter(new SimpleAdapter(this,//新的简单适配器,运用了自己的上下文
                (List<Map<String, ?>>)getData("org.cocos2d.tests"),//getData是个方法,getData(String)往下看有方法的声明
                android.R.layout.simple_list_item_1, new String[]{"title"},
                new int[]{android.R.id.text1}));
        getListView().setTextFilterEnabled(true);//启用过滤窗口
    }

    protected List<?> getData(String prefix) {//即上述方法
        List<Map<String,?>> myData = new ArrayList<Map<String,?>>();//一个用来盛放map的list,map立盛放String


        Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);//意图指定跳到系统桌面
        mainIntent.addCategory(Intent.CATEGORY_TEST);//供测试使用

        PackageManager pm = getPackageManager();//包控制器,用来获得现在有的进程
        List<ResolveInfo> list = pm.queryIntentActivities(mainIntent, 0);//通过Intent查找相关的Activity,更准确
        if (null == list)//没找到那个测试意图
            return myData;//就结束

        /* 以下是个没有被使用的方法用来分割字符串,用/
        String[] prefixPath;
        if (prefix.equals("")) {
            prefixPath = null;
        } else {
            prefixPath = prefix.split("/");
        }*/
        int len = list.size();//得到list的长度

        // Map<String, Boolean> entries = new HashMap<String, Boolean>();//一个没有被使用的map,用了哈希类型的map


        for (int i = 0; i < len; i++) {
            ResolveInfo info = list.get(i);//用来循环刚才得到的那个list
            String activityName = info.activityInfo.name;//得到activity的名字
            if (prefix.length() == 0 || activityName.startsWith(prefix)) {//如果要查找的那个activity的包名长度为0或者与我们要找的那个名字是以这个开头的
                String[] labelPath = activityName.split("\\.");//把包名用.分开
                String nextLabel = labelPath[labelPath.length - 1];//得到最后一个.后面的名字,即类名
                addItem(myData, nextLabel, activityIntent(//现在把他添加到mydata的集合,这个方法在后面会出现,就是分别把各种信息用map区分了
                        info.activityInfo.applicationInfo.packageName,
                        info.activityInfo.name));
            }
        }
        Collections.sort(myData, sDisplayNameComparator);//Collections是个很有用的集合,其中有个sort是用来排序的,参数中sDisplayNameComparator是个比较方法
        return myData;
    }
//下面这个定义,乍一看是方法,其实是个字段,定义一个比较方法的引用
    private final static Comparator<Map<String, ?>> sDisplayNameComparator = new Comparator<Map<String, ?>>() {//对那个引用的实现
        private final Collator collator = Collator.getInstance();//新疆一个集合

        public int compare(Map<String,?> map1, Map<String,?> map2) {//两个的比较规则
            return collator.compare(map1.get("title"), map2.get("title"));//就是比较他们字符的那种方法,就是从左到右一个一个字母,比ascll码
        }
    };

    protected Intent activityIntent(String pkg, String componentName) {
        Intent result = new Intent();
        result.setClassName(pkg, componentName);//设置意图从哪个包到哪个类
        return result;
    }

    protected Intent browserIntent(String path) {
        Intent result = new Intent();
        result.setClass(this, Cocos2D.class);//设置从哪个class到哪
        result.putExtra("org.cocos2d.tests.Path", path);//加一个额外的变量
        return result;
    }

    protected void addItem(List<Map<String,?>> data, String name, Intent intent) {
        Map<String, Object> temp = new HashMap<String, Object>();
        temp.put("title", name);
        temp.put("intent", intent);
        data.add(temp);//对data添加项目
    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        Map<String,?> map = (Map<String,?>) l.getItemAtPosition(position);//得到点击了哪个包
        Intent intent = (Intent) map.get("intent");//找到那个类全名
        startActivity(intent);
    }
}