标签：android
接上回，上回我们讲到MainActivity里面将所有的宋词标题和作者显示到界面的ListView中去，我们接下来的工作是通过点击ListView的Item跳转到ContentActivity里面去显示单个宋词的全部内容，跳转代码如下：
// 为ListView的Item设置点击监听器
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// 将当前被点击的item所代表的诗词对象的引用赋给currentSongCi
Global.currentSongCi = scList.get(position);
// 进行界面跳转
Intent intent = new Intent(MainActivity.this,
ContentActivity.class);
startActivity(intent);
}
});
在这里，我用一个静态变量将所点击的ListView Item所代表的宋词记录下来，然后跳转到ContentActivity。
我们在来首先看一下ContentActivity的布局文件activity_content.xml的内容：
<?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="标题"
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>这里，我们可以发现，一首宋词的标题、作者、内容分别对应三个TextView控件。
接着我们再来看一下ContentActivity的内容：
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;
//字体变小按钮
private ImageView fontSmallImageView;
//字体变大按钮
private ImageView fontBigImageView;
//代表作者TextView和主体TextView的文本文字大小默认值
private float defaultTextSize;
//代表当前标题TextView的文本文字大小
private float currentTitleTextSize;
//代表当前作者TextView和主体TextView的文本文字大小
private float currentTextSize;
//代表标题TextView
private TextView titleTextView;
//代表作者TextView
private TextView authTextView;
//代表主要内容TextView
private TextView descTextView;
//代表返回按钮
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() {
//通过findviewbyid()方法获取三个TextView控件
titleTextView = (TextView) findViewById(R.id.tv_title);
authTextView = (TextView) findViewById(R.id.tv_author);
descTextView = (TextView) findViewById(R.id.tv_desc);
//将currentSongCi赋给类变量sc
sc = Global.currentSongCi;
//通过get()方法获取标题、作者、内容的值
String title = sc.getTitle();
String auth = sc.getAuth();
String desc = sc.getDesc();
//将宋词的内容显示到三个TextView控件
titleTextView.setText(title);
authTextView.setText(auth);
//对字符串进行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());
//初始化字体大小变量
defaultTextSize = 14;
currentTitleTextSize = 20;
currentTextSize = 14;
fontBigImageView = (ImageView) findViewById(R.id.iv_font_big);
fontSmallImageView = (ImageView) findViewById(R.id.iv_font_small);
//为fontBigImageView设置监听器
fontBigImageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
currentTitleTextSize++;
currentTextSize++;
if((currentTextSize-defaultTextSize) > 5){
currentTitleTextSize--;
currentTextSize--;
}else{
setFont();
}
}
});
//为fontSmallImageView设置监听器
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);
//为backBtn设置监听器
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);
}
});
}
/**
* 设置界面字体大小
*/
private void setFont(){
titleTextView.setTextSize(currentTitleTextSize);
authTextView.setTextSize(currentTextSize);
descTextView.setTextSize(currentTextSize);
}
}
Spanned sp = Html.fromHtml(desc);界面截图如下：
最后我们再来实现一个主界面的搜索功能，我的思想是这样的定义一个ArrayList<SongCi> resultList这样的链表，因为已经有了scList里面存储的是全部的宋词，用for循环遍历scList，将满足搜索条件的结果加入到resultList当中去，搜索完成后就将ListView显示resultList里面的内容，关键代码如下：
//为searchDialogBtn设置点击监听器
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;
}
//将搜索对话框消失掉
if (searchDialog.isShowing()) {
searchDialog.dismiss();
}
//初始化结果列表适配器resultSongCiAdapter
if (resultSongCiAdapter == null) {
resultSongCiAdapter = new MainListViewAdapter(
MainActivity.this, resultList);
}else{
//通知适配器，源数据已改变
resultSongCiAdapter.notifyDataSetChanged();
}
mListView.setAdapter(resultSongCiAdapter);
}
});/**
* 通过传递过来的参数来搜索宋词结果
*
* @param searchType 按哪种条件(标题、词人、内容)进行搜索
*/
private void searchSongCi(int searchType) {
//初始化resultList
if (resultList == null) {
resultList = new ArrayList<SongCi>();
}else{
resultList.clear();
}
//获取搜索关键词
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();
//如果标题中包含关键词，就将当前的宋词对象加入到结果链表中
if (title.contains(searchWords)) {
resultList.add(sc);
}
break;
case SEARCH_TYPE_AUTHOR:
String auth = sc.getAuth();
//如果作者名中包含关键词，就将当前的宋词对象加入到结果链表中
if (auth.contains(searchWords)) {
resultList.add(sc);
}
break;
case SEARCH_TYPE_CONTENT:
String desc = sc.getDesc();
//如果内容中包含关键词，就将当前宋词对象加入到结果链表中
if (desc.contains(searchWords)) {
resultList.add(sc);
}
break;
default:
break;
}
}
}
最后附上整个项目的源码：
Android应用之《宋词三百首》(二),布布扣,bubuko.com
标签：android
原文地址：http://blog.csdn.net/bear_huangzhen/article/details/25274303
