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Android攻城獅的第二門課（第1季）

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時(shí)長 5小時(shí) 0分
學(xué)習(xí)人數(shù)
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9.8 內(nèi)容實(shí)用
9.4 簡潔易懂
9.1 邏輯清晰

  • 代碼1

    步驟

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    0 采集 收起 來源：使用GridView

    2018-05-15

  • GridView課程目標(biāo)

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    0 采集 收起 來源：GridView概述

    2018-05-15

  • GridView


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    0 采集 收起 來源：GridView概述

    2018-05-15

  • ?使用DatePicker以及TimePicker顯示當(dāng)前日期和時(shí)間注意事項(xiàng)


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    0 采集 收起 來源：總結(jié)

    2018-05-15 


  • protected?void?onCreate(Bundle?savedInstanceState)?{
????super.onCreate(savedInstanceState);
????setContentView(R.layout.main);
????//獲取日歷的一個(gè)對(duì)象
????cal?=?Calendar.getInstance();
????//獲取年月日時(shí)分秒的信息
????year?=?cal.get(Calendar.YEAR);
????month?=?cal.get(Calendar.MONTH)+1;
?????day?=?cal.get(Calendar.DAY_OF_MONTH)；
????hour?=?cal.get(Calendar.HOUR_OF_DAY);
????minute?=?cal.get(Calendar.MINUTE);
????setTitle(Year+"-"?+?month?+?"-"?+?day?+?"-"?+?hour?+?"-"?+?minute);
????datePicker?=?(DatePicker)?findViewById(R.id.datePicker);
????timePicker?=?(TimePicker)?findViewById(R.id.timePicker);
????//datePicker初始化
????datePicker.init(year,?month,?day,?new?onDateChangedListener()?{

????});
}


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  • 需求功能


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    0 采集 收起 來源：案例需求描述

    2018-05-14

  • OnDateChangedListener和OnTimeChangedListener()

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  • 總結(jié) 知識(shí)要點(diǎn)及注意事項(xiàng)

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    0 采集 收起 來源：總結(jié)

    2018-05-14 


  • public?class?MainActivity?extends?Activity?implement?OnItemClickListener,?OnScrollListener?{
????private?ListView?listView;
????private?ArrayAdapter<String>arr_adapter;
????private?SimpleAdapter?simp_adapter;
????private?List<Map<String,?Object>>dataList;
????@Override
????protected?void?onCreate(Bundle?saveInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.main);
????????
????????listView?=?(ListView)findViewById(R.id.listView);
????????
????????//1、新建一個(gè)數(shù)據(jù)適配器
????????//ArrayAdapter(上下文，當(dāng)前ListView加載的每一個(gè)列表項(xiàng)所對(duì)應(yīng)的布局文件，數(shù)據(jù)源)
????????//SimpleAdapter()
????????
????????/**
????????*?context:?上下文
????????*?data:?數(shù)據(jù)源?(List<??extends?Map<String,??>>?data)?
????????*一個(gè)Map所組成的List集合
????????*?每一個(gè)Map都會(huì)去對(duì)應(yīng)ListView列表中的一行
????????*每一個(gè)Map(鍵-值對(duì))中的鍵必須包含所有在from中所指定的鍵
????????*
????????*resource:?列表項(xiàng)的布局文件ID
????????*from:?Map中的鍵名
????????*to:?綁定數(shù)據(jù)視圖中的ID，與from成對(duì)應(yīng)關(guān)系
????????*/
????????
????????//2、適配器加載數(shù)據(jù)源
????????String[]?arr_data?=?{"imooc1",?"imooc2"?,?"imooc3",?"imooc4"};
????????dataList?=?new?ArrayList<Map<String,?Object>>();
????????arr_adapter?=?new?ArrayAdapter<String>(this,?android.R.layout.simple_list_item1,?arr_data);
????????//new?SimpleAdapter(context,?data,?resource,?from,?to)
????????simp_adapter?=?new?SimpleAdapter(this,?getData(),?R.layout.item,?new?String[]{"pic",?"text"},?new?int[]{R.id.pic,?R.id.text});
????????
????????//3、視圖（ListView）加載適配器
????????//listView.setAdapter(arr_adapter);
????????listView.setAdapter(simp_adapter);
????????
????????//ListView加載事件監(jiān)聽器
????????listView.setOnItemClickListener(this);
????????listView.setOnScrollListener(this);
????}
????
????private?List<Map<String,?Object>>?getData()?{
????????for(int?i=0;?i<20;?i++)?{
????????????Map<String,?Object>map?=?new?HashMap<String,?Object>();
????????????map.put("pic",?R.drawable.img1);
????????????map.put("text",?"慕課網(wǎng)"?+?i);
????????????dataList.add(map);
????????}
????????return?dataList;
????}
????
????public?void?onScrollStateChanged(AbsListView?view,?int?ScorllState)?{
????
????}
????public?void?onScroll(AbsListView?view,?int?firstVisibleItem,?int?visibleItemCount,?int?totalItemCount)?{
????}
????public?void?onItemClick(AdapterView<?>?parent,?View?view,?int?position,?long?id)?{
????????String?text?=?listView.getItemAtPosition(position)?+?"";
????????Toast?.makeText(this,?"position="?+?position?+?"?text="?+?text,?Toast.LENGTH_SHORT).show();
????}
}



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  • public?class?MainActivity?extends?Activity?implement?OnItemClickListener,?OnScrollListener?{
????private?ListView?listView;
????private?ArrayAdapter<String>arr_adapter;
????private?SimpleAdapter?simp_adapter;
????private?List<Map<String,?Object>>dataList;
????@Override
????protected?void?onCreate(Bundle?saveInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.main);
????????listView?=?(ListView)findViewById(R.id.listView);
????????//1、新建一個(gè)數(shù)據(jù)適配器
????????//ArrayAdapter(上下文，當(dāng)前ListView加載的每一個(gè)列表項(xiàng)所對(duì)應(yīng)的布局文件，數(shù)據(jù)源)
????????//SimpleAdapter()
????????/**
????????*?context:?上下文
????????*?data:?數(shù)據(jù)源?(List<??extends?Map<String,??>>?data)?
????????*一個(gè)Map所組成的List集合
????????*?每一個(gè)Map都會(huì)去對(duì)應(yīng)ListView列表中的一行
????????*每一個(gè)Map(鍵-值對(duì))中的鍵必須包含所有在from中所指定的鍵
????????*
????????*resource:?列表項(xiàng)的布局文件ID
????????*from:?Map中的鍵名
????????*to:?綁定數(shù)據(jù)視圖中的ID，與from成對(duì)應(yīng)關(guān)系
????????*/
????????//2、適配器加載數(shù)據(jù)源
????????String[]?arr_data?=?{"imooc1",?"imooc2"?,?"imooc3",?"imooc4"};
????????dataList?=?new?ArrayList<Map<String,?Object>>();
????????arr_adapter?=?new?ArrayAdapter<String>(this,?android.R.layout.simple_list_item1,?arr_data);
????????//new?SimpleAdapter(context,?data,?resource,?from,?to)
????????simp_adapter?=?new?SimpleAdapter(this,?getData(),?R.layout.item,?new?String[]{"pic",?"text"},?new?int[]{R.id.pic,?R.id.text});
????????//3、視圖（ListView）加載適配器
????????//listView.setAdapter(arr_adapter);
????????listView.setAdapter(simp_adapter);
????????//ListView加載事件監(jiān)聽器
????????listView.setOnItemClickListener(this);
????????listView.setOnScrollListener(this);
????}
????private?List<Map<String,?Object>>?getData()?{
????????for(int?i=0;?i<20;?i++)?{
????????????Map<String,?Object>map?=?new?HashMap<String,?Object>();
????????????map.put("pic",?R.drawable.img1);
????????????map.put("text",?"慕課網(wǎng)"?+?i);
????????????dataList.add(map);
????????}
????????return?dataList;
????}
????public?void?onScrollStateChanged(AbsListView?view,?int?ScorllState)?{
????????switch(scrollState)?{
????????case?SCROLL_STATE_FLING:
????????????log.i("Main",?"手指離開屏幕，由于用力滑了一下，視圖扔繼續(xù)滾動(dòng)");
????????????Map<String,?Object>map?=?new?HashMap<String,?Object>();
????????????map.put("pic',?R.drawable.img1);
????????????map.put("text",?"增加項(xiàng)");
????????????dataList.add(map);
????????????//重新刷新列表界面
????????????simp_adapter.notifyDataSetChange();
????????????break;
????????case?SCROLL_STATE_IDLE:
????????????log.i("Main",?"視圖已經(jīng)停止滑動(dòng)");
????????????break;
????????case?SCROLL_STATE_TOUCH_SCROLL:
????????????log.i("Main",?"手指沒有離開屏幕，視圖正在滑動(dòng)");
????????????break;
????????}
????}
????public?void?onScroll(AbsListView?view,?int?firstVisibleItem,?int?visibleItemCount,?int?totalItemCount)?{
????}
????public?void?onItemClick(AdapterView<?>?parent,?View?view,?int?position,?long?id)?{
????????String?text?=?listView.getItemAtPosition(position)?+?"";
????????Toast?.makeText(this,?"position="?+?position?+?"?text="?+?text,?Toast.LENGTH_SHORT).show();
????}
}


    item.xml

    <LinearLayout?
????android:?layout_width?=?"match_parent"
????android:?layout_height?=?"match_parent"
????xmlns:android="http://schemas.android.com/apk/res/android"
????android:?orientation?=?"horizontal"?>
????<ImageView
????????android:?id?=?"@+id/pic"
????????android:?layout_marginLeft?=?"15dp"
????????android:?layout_width?=?"wrap_content"
????????android:?layout_height?=?"wrap_content"
????????android:?src?=?"@drawable/img1"?/>
????<TextView
????????android:?id?=?"@+id/text"
????????android:?layout_width?=?"wrap_content"
????????android:?layout_height?=?"wrap_content"
????????android:?textSize?=?"20sp"
????????android:?textColor?=?"#000"
????????android:?text?=?"demo"?/>
<LinearLayout/>


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  • 監(jiān)聽器

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  • MainActivity.java

    public?class?MainActivity?extends?Activity?{
????private?ListView?listView;
????private?ArrayAdapter<String>arr_adapter;
????private?SimpleAdapter?simp_adapter;
????private?List<Map<String,?Object>>dataList;
????@Override
????protected?void?onCreate(Bundle?saveInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.main);
????????listView?=?(ListView)findViewById(R.id.listView);
????????//1、新建一個(gè)數(shù)據(jù)適配器
????????//ArrayAdapter(上下文，當(dāng)前ListView加載的每一個(gè)列表項(xiàng)所對(duì)應(yīng)的布局文件，數(shù)據(jù)源)
????????//SimpleAdapter()
????????/**
????????*?context:?上下文
????????*?data:?數(shù)據(jù)源?(List<??extends?Map<String,??>>?data)?
????????*一個(gè)Map所組成的List集合
????????*?每一個(gè)Map都會(huì)去對(duì)應(yīng)ListView列表中的一行
????????*每一個(gè)Map(鍵-值對(duì))中的鍵必須包含所有在from中所指定的鍵
????????*
????????*resource:?列表項(xiàng)的布局文件ID
????????*from:?Map中的鍵名
????????*to:?綁定數(shù)據(jù)視圖中的ID，與from成對(duì)應(yīng)關(guān)系
????????*/
????????//2、適配器加載數(shù)據(jù)源
????????String[]?arr_data?=?{"imooc1",?"imooc2"?,?"imooc3",?"imooc4"};
????????dataList?=?new?ArrayList<Map<String,?Object>>();
????????arr_adapter?=?new?ArrayAdapter<String>(this,?android.R.layout.simple_list_item1,?arr_data);
????????//new?SimpleAdapter(context,?data,?resource,?from,?to)
????????simp_adapter?=?new?SimpleAdapter(this,?getData(),?R.layout.item,?new?String[]{"pic",?"text"},?new?int[]{R.id.pic,?R.id.text});
????????//3、視圖（ListView）加載適配器
????????//listView.setAdapter(arr_adapter);
????????listView.setAdapter(simp_adapter);
????}
????private?List<Map<String,?Object>>?getData()?{
????????for(int?i=0;?i<20;?i++)?{
????????????Map<String,?Object>map?=?new?HashMap<String,?Object>();
????????????map.put("pic",?R.drawable.img1);
????????????map.put("text",?"慕課網(wǎng)"?+?i);
????????????dataList.add(map);
????????}
????????return?dataList;
????}
}

    item.xml

    <LinearLayout?
????android:?layout_width?=?"match_parent"
????android:?layout_height?=?"match_parent"
????xmlns:android="http://schemas.android.com/apk/res/android"
????android:?orientation?=?"horizontal"?>
????<ImageView
????????android:?id?=?"@+id/pic"
????????android:?layout_marginLeft?=?"15dp"
????????android:?layout_width?=?"wrap_content"
????????android:?layout_height?=?"wrap_content"
????????android:?src?=?"@drawable/img1"?/>
????<TextView
????????android:?id?=?"@+id/text"
????????android:?layout_width?=?"wrap_content"
????????android:?layout_height?=?"wrap_content"
????????android:?textSize?=?"20sp"
????????android:?textColor?=?"#000"
????????android:?text?=?"demo"?/>
<LinearLayout/>


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    2 采集 收起 來源：使用SimpleAdapter

    2018-05-14 

  • public?class?MainActivity?extends?Activity?{
????private?ListView?listView;
????private?ArrayAdapter<String>arr_adapter;
????private?SimpleAdapter?simp_adapter;
????@Override
????protected?void?onCreate(Bundle?saveInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.main);
????????listView?=?(ListView)findViewById(R.id.listView);
????????//1、新建一個(gè)數(shù)據(jù)適配器
????????//ArrayAdapter(上下文，當(dāng)前ListView加載的每一個(gè)列表項(xiàng)所對(duì)應(yīng)的布局文件，數(shù)據(jù)源)
????????//2、適配器加載數(shù)據(jù)源
????????String[]?arr_data?=?{"imooc1",?"imooc2"?,?"imooc3",?"imooc4"};
????????arr_adapter?=?new?ArrayAdapter<String>(this,?android.R.layout.simple_list_item1,?arr_data);
????????//3、視圖（ListView）加載適配器
????????listView.setAdapter(arr_adapter);
????}
}
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    0 采集 收起 來源：使用ArrayAdapter

    2018-05-14

  • 數(shù)據(jù)適配器

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    0 采集 收起 來源：解讀適配器

    2018-05-14

  • ListView

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    0 采集 收起 來源：ListView解析

    2018-05-14

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課程須知
本課程是Android開發(fā)課程進(jìn)階部分的第1季，將講解各種高級(jí)控件的使用，對(duì)于不熟悉Android開發(fā)的童鞋來說會(huì)有一定的難度，所以，建議在學(xué)習(xí)本門課程之前： 1、熟練掌握J(rèn)ava基礎(chǔ)語法和面向?qū)ο缶幊? 2、熟悉Android開發(fā)環(huán)境 3、熟練使用Button、ImageView等基礎(chǔ)控件
老師告訴你能學(xué)到什么？
1、Android高級(jí)控件的應(yīng)用場景 2、Android高級(jí)控件的使用方法 3、熟悉Android常用高級(jí)控件

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