轉載自：http://blog.csdn.net/bear_huangzhen/article/details/25274303

接上回，上回我們講到MainActivity里面將所有的宋詞標題和作者顯示到界面的ListView中去，我們接下來的工作是通過點擊ListView的Item跳轉到ContentActivity里面去顯示單個宋詞的全部內容，跳轉代碼如下：

[java]?view plaincopy

<span?style="font-size:18px;">//?為ListView的Item設置點擊監(jiān)聽器??

????????mListView.setOnItemClickListener(new?OnItemClickListener()?{??

??

????????????@Override??

????????????public?void?onItemClick(AdapterView<?>?parent,?View?view,??

????????????????????int?position,?long?id)?{??

????????????????//?將當前被點擊的item所代表的詩詞對象的引用賦給currentSongCi??

????????????????Global.currentSongCi?=?scList.get(position);??

????????????????//?進行界面跳轉??

????????????????Intent?intent?=?new?Intent(MainActivity.this,??

????????????????????????ContentActivity.class);??

????????????????startActivity(intent);??

????????????}??

????????});</span>??

在這里，我用一個靜態(tài)變量將所點擊的ListView Item所代表的宋詞記錄下來，然后跳轉到ContentActivity。

我們在來首先看一下ContentActivity的布局文件activity_content.xml的內容：

[html]?view plaincopy

<span?style="font-size:18px;"><?xml?version="1.0"?encoding="utf-8"?>??

<LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"??

????android:id="@id/ll_parent"??

????android:layout_width="fill_parent"??

????android:layout_height="fill_parent"??

????android:background="@drawable/bg4"??

????android:orientation="vertical"?>??

??

????<RelativeLayout??

????????android:layout_width="fill_parent"??

????????android:layout_height="46.0dip"??

????????android:background="@drawable/toolbar"?>??

??

????????<TextView??

????????????android:id="@id/tv_app_title"??

????????????android:layout_width="wrap_content"??

????????????android:layout_height="wrap_content"??

????????????android:layout_centerHorizontal="true"??

????????????android:layout_centerVertical="true"??

????????????android:text="@string/app_name"??

????????????android:textAppearance="?android:textAppearanceLarge"??

????????????android:textColor="#ffffffff"?/>??

??

????????<Button??

????????????android:id="@id/btn_back"??

????????????android:layout_width="72.0dip"??

????????????android:layout_height="46.0dip"??

????????????android:layout_alignParentLeft="true"??

????????????android:layout_centerVertical="true"??

????????????android:background="@drawable/btn_left"??

????????????android:paddingLeft="6.0dip"??

????????????android:text="@string/back"??

????????????android:textColor="#ffffffff"??

????????????android:textSize="14.0sp"?/>??

??

????????<ImageView??

????????????android:id="@id/iv_font_small"??

????????????android:layout_width="wrap_content"??

????????????android:layout_height="wrap_content"??

????????????android:layout_alignParentRight="true"??

????????????android:layout_centerVertical="true"??

????????????android:src="@drawable/font_small"?/>??

??

????????<ImageView??

????????????android:id="@id/iv_font_big"??

????????????android:layout_width="wrap_content"??

????????????android:layout_height="wrap_content"??

????????????android:layout_centerVertical="true"??

????????????android:layout_toLeftOf="@id/iv_font_small"??

????????????android:src="@drawable/font_big"?/>??

????</RelativeLayout>??

??

????<ScrollView??

????????android:id="@id/scrollView1"??

????????android:layout_width="fill_parent"??

????????android:layout_height="0.0dip"??

????????android:layout_margin="8.0dip"??

????????android:layout_weight="1.0"??

????????android:background="@drawable/item_bg2"?>??

??

????????<LinearLayout??

????????????android:id="@id/linearLayout1"??

????????????android:layout_width="fill_parent"??

????????????android:layout_height="fill_parent"??

????????????android:orientation="vertical"?>??

??

????????????<TextView??

????????????????android:id="@id/tv_title"??

????????????????style="@style/black_normal"??

????????????????android:layout_width="fill_parent"??

????????????????android:layout_height="wrap_content"??

????????????????android:layout_margin="5.0dip"??

????????????????android:text="標題"??

????????????????android:textAppearance="?android:textAppearanceMedium"?/>??

??

????????????<LinearLayout??

????????????????android:layout_width="fill_parent"??

????????????????android:layout_height="1.0px"??

????????????????android:layout_marginLeft="5.0dip"??

????????????????android:layout_marginRight="5.0dip"??

????????????????android:background="#ff666666"?/>??

??

????????????<TextView??

????????????????android:id="@id/tv_author"??

????????????????style="@style/black_normal"??

????????????????android:layout_width="fill_parent"??

????????????????android:layout_height="wrap_content"??

????????????????android:layout_margin="5.0dip"??

????????????????android:text="作者"??

????????????????android:textAppearance="?android:textAppearanceSmall"?/>??

??

????????????<LinearLayout??

????????????????android:layout_width="fill_parent"??

????????????????android:layout_height="1.0px"??

????????????????android:layout_marginLeft="5.0dip"??

????????????????android:layout_marginRight="5.0dip"??

????????????????android:background="#ff666666"?/>??

??

????????????<TextView??

????????????????android:id="@id/tv_desc"??

????????????????style="@style/black_normal"??

????????????????android:layout_width="fill_parent"??

????????????????android:layout_height="fill_parent"??

????????????????android:layout_margin="5.0dip"??

????????????????android:lineSpacingMultiplier="1.3"??

????????????????android:text="注解"??

????????????????android:textAppearance="?android:textAppearanceSmall"?/>??

????????</LinearLayout>??

????</ScrollView>??

??

</LinearLayout></span>??

這里，我們可以發(fā)現(xiàn)，一首宋詞的標題、作者、內容分別對應三個TextView控件。

接著我們再來看一下ContentActivity的內容：

[java]?view plaincopy

<span?style="font-size:18px;">package?com.example.songcidemo.ui;??

??

import?android.app.Activity;??

import?android.content.Intent;??

import?android.os.Bundle;??

import?android.text.Html;??

import?android.text.Spanned;??

import?android.util.Log;??

import?android.view.View;??

import?android.view.View.OnClickListener;??

import?android.view.Window;??

import?android.widget.Button;??

import?android.widget.ImageView;??

import?android.widget.TextView;??

??

import?com.example.songcidemo.R;??

import?com.example.songcidemo.bean.SongCi;??

import?com.example.songcidemo.util.Global;??

??

public?class?ContentActivity?extends?Activity?{??

??

????private?SongCi?sc;??

??????

????//字體變小按鈕??

????private?ImageView?fontSmallImageView;??

????//字體變大按鈕??

????private?ImageView?fontBigImageView;??

??????

????//代表作者TextView和主體TextView的文本文字大小默認值??

????private?float?defaultTextSize;??

????//代表當前標題TextView的文本文字大小??

????private?float?currentTitleTextSize;??

????//代表當前作者TextView和主體TextView的文本文字大小??

????private?float?currentTextSize;??

??????

????//代表標題TextView??

????private?TextView?titleTextView;??

????//代表作者TextView??

????private?TextView?authTextView;??

????//代表主要內容TextView??

????private?TextView?descTextView;??

??????

????//代表返回按鈕??

????private?Button?backBtn;??

??

????@Override??

????protected?void?onCreate(Bundle?savedInstanceState)?{??

????????super.onCreate(savedInstanceState);??

????????requestWindowFeature(Window.FEATURE_NO_TITLE);??

????????setContentView(R.layout.activity_content);??

??

????????setupViews();??

????}??

??????

????/**?

?????*?初始化界面?

?????*/??

????private?void?setupViews()?{??

??????????

????????//通過findviewbyid()方法獲取三個TextView控件??

????????titleTextView?=?(TextView)?findViewById(R.id.tv_title);??

????????authTextView?=?(TextView)?findViewById(R.id.tv_author);??

????????descTextView?=?(TextView)?findViewById(R.id.tv_desc);??

??????????

????????//將currentSongCi賦給類變量sc??

????????sc?=?Global.currentSongCi;??

????????//通過get()方法獲取標題、作者、內容的值???

????????String?title?=?sc.getTitle();??

????????String?auth?=?sc.getAuth();??

????????String?desc?=?sc.getDesc();??

??????????

????????//將宋詞的內容顯示到三個TextView控件??

????????titleTextView.setText(title);??

????????authTextView.setText(auth);??

????????//對字符串進行HTML格式化??

????????Spanned?sp?=?Html.fromHtml(desc);??

????????descTextView.setText(sp);??

//??????descWebView.loadDataWithBaseURL("fake://not/needed",?desc,?"text/html",??

//??????????????"utf-8",?"");??

??????????

????????Log.v("ContentActivity",?""?+?titleTextView.getTextSize());??

????????Log.v("ContentActivity",?""?+?authTextView.getTextSize());??

????????Log.v("ContentActivity",?""?+?descTextView.getTextSize());??

??????????

????????//初始化字體大小變量??

????????defaultTextSize?=?14;??

????????currentTitleTextSize?=?20;??

????????currentTextSize?=?14;??

??????????

????????fontBigImageView?=?(ImageView)?findViewById(R.id.iv_font_big);??

????????fontSmallImageView?=?(ImageView)?findViewById(R.id.iv_font_small);???

??????????

????????//為fontBigImageView設置監(jiān)聽器??

????????fontBigImageView.setOnClickListener(new?OnClickListener()?{??

??????????????

????????????@Override??

????????????public?void?onClick(View?v)?{??

????????????????currentTitleTextSize++;??

????????????????currentTextSize++;??

????????????????if((currentTextSize-defaultTextSize)?>?5){??

????????????????????currentTitleTextSize--;??

????????????????????currentTextSize--;??

????????????????}else{??

????????????????????setFont();??

????????????????}??

????????????}??

????????});??

??????????

????????//為fontSmallImageView設置監(jiān)聽器??

????????fontSmallImageView.setOnClickListener(new?OnClickListener()?{??

??????????????

????????????@Override??

????????????public?void?onClick(View?v)?{??

????????????????currentTitleTextSize--;??

????????????????currentTextSize--;??

????????????????if((defaultTextSize-currentTextSize)?>?5){??

????????????????????currentTitleTextSize++;??

????????????????????currentTextSize++;??

????????????????}else{??

????????????????????setFont();??

????????????????}??

????????????}??

????????});??

??????????

????????backBtn?=?(Button)?findViewById(R.id.btn_back);??

??????????

????????//為backBtn設置監(jiān)聽器??

????????backBtn.setOnClickListener(new?OnClickListener()?{??

??????????????

????????????@Override??

????????????public?void?onClick(View?v)?{??

????????????????//返回到主界面??

????????????????Intent?intent?=?new?Intent(ContentActivity.this,?MainActivity.class);??

????????????????startActivity(intent);??

????????????}??

????????});??

??????????

????}??

??????

????/**?

?????*?設置界面字體大小?

?????*/??

????private?void?setFont(){??

????????titleTextView.setTextSize(currentTitleTextSize);??

????????authTextView.setTextSize(currentTextSize);??

????????descTextView.setTextSize(currentTextSize);??

????}??

??

}??

</span>??

為了將desc里面的諸如<p><br>這寫HTML元素體現(xiàn)出來，這里需要一點小小的轉換，就是這句 [java]?view plaincopy

<span?style="font-size:18px;">Spanned?sp?=?Html.fromHtml(desc);</span>??

這個Activity中還實現(xiàn)了一個功能就是可以改變界面文字的大小。

界面截圖如下：

最后我們再來實現(xiàn)一個主界面的搜索功能，我的思想是這樣的定義一個ArrayList<SongCi> resultList這樣的鏈表，因為已經(jīng)有了scList里面存儲的是全部的宋詞，用for循環(huán)遍歷scList，將滿足搜索條件的結果加入到resultList當中去，搜索完成后就將ListView顯示resultList里面的內容，關鍵代碼如下：

[java]?view plaincopy

//為searchDialogBtn設置點擊監(jiān)聽器??

????????searchDialogBtn.setOnClickListener(new?OnClickListener()?{??

??

????????????@Override??

????????????public?void?onClick(View?v)?{??

????????????????switch?(currentSearchRadioButtonId)?{??

????????????????case?R.id.radio0:??

????????????????????searchSongCi(SEARCH_TYPE_TITLE);??

????????????????????break;??

????????????????case?R.id.radio1:??

????????????????????searchSongCi(SEARCH_TYPE_AUTHOR);??

????????????????????break;??

????????????????case?R.id.radio2:??

????????????????????searchSongCi(SEARCH_TYPE_CONTENT);??

??

????????????????default:??

????????????????????break;??

????????????????}??

????????????????//將搜索對話框消失掉??

????????????????if?(searchDialog.isShowing())?{??

????????????????????searchDialog.dismiss();??

????????????????}??

??????????????????

????????????????//初始化結果列表適配器resultSongCiAdapter??

????????????????if?(resultSongCiAdapter?==?null)?{??

????????????????????resultSongCiAdapter?=?new?MainListViewAdapter(??

????????????????????????????MainActivity.this,?resultList);??

????????????????}else{??

????????????????????//通知適配器，源數(shù)據(jù)已改變??

????????????????????resultSongCiAdapter.notifyDataSetChanged();??

????????????????}??

??

????????????????mListView.setAdapter(resultSongCiAdapter);??

??

????????????}??

????????});??

自定義方法的內容是：

[java]?view plaincopy

/**?

?????*?通過傳遞過來的參數(shù)來搜索宋詞結果?

?????*??

?????*?@param?searchType????按哪種條件(標題、詞人、內容)進行搜索?

?????*/??

????private?void?searchSongCi(int?searchType)?{??

??????????

????????//初始化resultList??

????????if?(resultList?==?null)?{??

????????????resultList?=?new?ArrayList<SongCi>();??

????????}else{??

????????????resultList.clear();??

????????}??

??????????

????????//獲取搜索關鍵詞??

????????String?searchWords?=?searchEditText.getText().toString().trim();??

????????if?(searchWords?==?null?||?searchWords.equals(""))?{??

????????????return;??

????????}??

??

????????for?(SongCi?sc?:?scList)?{??

????????????switch?(searchType)?{??

????????????case?SEARCH_TYPE_TITLE:??

????????????????String?title?=?sc.getTitle();??

????????????????//如果標題中包含關鍵詞，就將當前的宋詞對象加入到結果鏈表中??

????????????????if?(title.contains(searchWords))?{??

????????????????????resultList.add(sc);??

????????????????}??

????????????????break;??

????????????case?SEARCH_TYPE_AUTHOR:??

????????????????String?auth?=?sc.getAuth();??

????????????????//如果作者名中包含關鍵詞，就將當前的宋詞對象加入到結果鏈表中??

????????????????if?(auth.contains(searchWords))?{??

????????????????????resultList.add(sc);??

????????????????}??

????????????????break;??

????????????case?SEARCH_TYPE_CONTENT:??

????????????????String?desc?=?sc.getDesc();??

????????????????//如果內容中包含關鍵詞，就將當前宋詞對象加入到結果鏈表中??

????????????????if?(desc.contains(searchWords))?{??

????????????????????resultList.add(sc);??

????????????????}??

????????????????break;??

??

????????????default:??

????????????????break;??

????????????}??

????????}??

??

????}??

搜索界面截圖如下：

最后附上整個項目的源碼：

Android應用之《宋詞三百首》

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