我正在使用android和java开发我的第一个项目 而且经验很少。 我有一个无线电播放器（启动和停止按钮，激活服务） 和 来自xml文件的一些数据，如艺术家标题和在textview中加载的相册 我使用一个计时器，以便gui更新播放的歌曲
这一切都有效 只有在文本视图中加载歌词时，它才会显示xml标记的第一行<LYRIC>
这是我的主要活动：
extends Activity implements OnClickListener{
private static final String TAG = "ServicesDemo";
public String myimageURL;
private EditText Lyrics;
private ImageView AlbumPic;
private Button play, stop;
private TextView Artist, Song, Album, News, Lyric;
private UpdateTimeTask m_updateTime;
private Handler m_handler;
Parser data;
/** The delay in milliseconds between updates. */
private final int DELAY = 20000;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Artist =(TextView)findViewById(R.id.tvArtist);
Song =(TextView)findViewById(R.id.tvSongTitle);
Album =(TextView)findViewById(R.id.tvAlbum);
play = (Button) findViewById(R.id.play);
stop = (Button) findViewById(R.id.stop);
Lyrics = (EditText) findViewById(R.id.tvLyrics);
News = (TextView)findViewById(R.id.tvAnouncement);
AlbumPic = (ImageView) findViewById(R.id.AlbumPic);
play.setOnClickListener(this);
stop.setOnClickListener(this);
m_updateTime = new UpdateTimeTask();
m_handler = new Handler();
m_handler.post(m_updateTime);
}
private class UpdateTimeTask implements Runnable {
public void run() {
try {
SAXParserFactory saxPF = SAXParserFactory.newInstance();
SAXParser saxP = saxPF.newSAXParser();
XMLReader xmlR = saxP.getXMLReader();
URL url = new URL("http://www.mysite.com/AndroidTest.php");
XMLHandler myXMLHandler = new XMLHandler();
xmlR.setContentHandler(myXMLHandler);
xmlR.parse(new InputSource(url.openStream()));
} catch (Exception e) {
System.out.println(e);
}
data = XMLHandler.data;
for (int i = 0; i < data.getTitle().size(); i++) {
Lyrics.setText(data.getLyric().get(i));
myimageURL = data.getPic().get(i);
Song.setText("Title = "+data.getTitle().get(i));
Artist.setText("Artist = "+data.getArtist().get(i));
Album.setText("Album = "+data.getAlbum().get(i));
}
downloadFile(myimageURL );
}
Bitmap bmImg;
void downloadFile(String fileUrl) {
URL myFileUrl = null;
try {
myFileUrl = new URL(fileUrl);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
HttpURLConnection conn = (HttpURLConnection) myFileUrl
.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
bmImg = BitmapFactory.decodeStream(is);
AlbumPic.setImageBitmap(bmImg);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
m_handler.postDelayed(m_updateTime, DELAY);
AlbumPic.clearAnimation();
}
}
extends Activity implements OnClickListener{
private static final String TAG = "ServicesDemo";
public String myimageURL;
private EditText Lyrics;
private ImageView AlbumPic;
private Button play, stop;
private TextView Artist, Song, Album, News, Lyric;
private UpdateTimeTask m_updateTime;
private Handler m_handler;
Parser data;
/** The delay in milliseconds between updates. */
private final int DELAY = 20000;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Artist =(TextView)findViewById(R.id.tvArtist);
Song =(TextView)findViewById(R.id.tvSongTitle);
Album =(TextView)findViewById(R.id.tvAlbum);
play = (Button) findViewById(R.id.play);
stop = (Button) findViewById(R.id.stop);
Lyrics = (EditText) findViewById(R.id.tvLyrics);
News = (TextView)findViewById(R.id.tvAnouncement);
AlbumPic = (ImageView) findViewById(R.id.AlbumPic);
play.setOnClickListener(this);
stop.setOnClickListener(this);
m_updateTime = new UpdateTimeTask();
m_handler = new Handler();
m_handler.post(m_updateTime);
}
private class UpdateTimeTask implements Runnable {
public void run() {
try {
SAXParserFactory saxPF = SAXParserFactory.newInstance();
SAXParser saxP = saxPF.newSAXParser();
XMLReader xmlR = saxP.getXMLReader();
URL url = new URL("http://www.mysite.com/AndroidTest.php");
XMLHandler myXMLHandler = new XMLHandler();
xmlR.setContentHandler(myXMLHandler);
xmlR.parse(new InputSource(url.openStream()));
} catch (Exception e) {
System.out.println(e);
}
data = XMLHandler.data;
for (int i = 0; i < data.getTitle().size(); i++) {
Lyrics.setText(data.getLyric().get(i));
myimageURL = data.getPic().get(i);
Song.setText("Title = "+data.getTitle().get(i));
Artist.setText("Artist = "+data.getArtist().get(i));
Album.setText("Album = "+data.getAlbum().get(i));
}
downloadFile(myimageURL );
}
Bitmap bmImg;
void downloadFile(String fileUrl) {
URL myFileUrl = null;
try {
myFileUrl = new URL(fileUrl);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
HttpURLConnection conn = (HttpURLConnection) myFileUrl
.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
bmImg = BitmapFactory.decodeStream(is);
AlbumPic.setImageBitmap(bmImg);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
m_handler.postDelayed(m_updateTime, DELAY);
AlbumPic.clearAnimation();
}
}
我的xml代码
我还尝试使用edittext加载歌词，但它也只显示<?xml version="1.0"?>
<CATALOG>
<CD>
<LYRIC>Stop that train: I'm leavin' - today!
Stop that train: I'm leavin' - anyway!
Stop that train: I'm leavin'. and I said:
It won't be too long whether I'm right or wrong;
I said, it won't be too long whether I'm right or wrong.
All my good life I've been a lonely man,
Teachin' my people who don't understand;
And even though I tried my best,
I still can't find no happiness.
So I got to say:
Stop that train: I'm leavin' - oh, baby now!
Stop that train: I'm leavin' - don't care what you say!
Stop that train: I'm leavin'. and I said:
It won't be too long whether I'm right or wrong;
Said, it won't be too long whether I'm right or wrong.
Some goin' east; and-a some goin' west,
Some stand aside to try their best.
Some livin' big, but the most is livin' small:
They just can't even find no food at all.
I mean, stop it:
Stop that train: I'm leavin' - leavin', mm-hmm.
Stop that train: I'm leavin' - I don't mind!
Stop that train: I'm leavin'. and I said:
It won't be too long whether I'm right or wrong;
I said it won't be too long whether I'm right or wrong.
Stop that train: I'm leavin' - leavin'!
Stop that train: I'm leavin' - can't take it!
Stop that train: I'm leavin' - got to be better!
It won't be too long whether I'm right or wrong;
I said it won't be too long whether I'm right or wrong.</LYRIC>
<ARTIST>Bob Marley</ARTIST>
<TITLE>Stop That Train</TITLE>
<ALBUM>Talkin blues</ALBUM>
<PIC>http://www.mysite.com/Android/Radio/AlbumCovers/Bob-Marley-Talkin-blues.jpg</PIC>
</CD>
</CATALOG>
标记的第一行
有人可以提供一些建议如何在textview中显示整个文本
感谢
我的xmlhandler
<LYRIC>答案 0 :(得分：0)
我建议你检查一下XMLHandler对象。我怀疑你有什么问题。
如果您能向我们展示最适合您的XMLHandler课程。
修改
我对您的处理程序进行了一些更改。我想你在阅读元素值时可能会遇到问题。请改用CharArrayWriter（我已经解决了相同的问题）。 而且我认为你也不需要'elementOn'。如果它是一个非必要的变量，就不要使用它。 确保在XML布局上定义了多个TextView。 希望它有效： - ）
public class XMLHandler extends DefaultHandler {
private static final String TAG = "XMLHandler";
private String elementValue = null;
public static Parser data = null;
/** The contents. */
private CharArrayWriter contents = new CharArrayWriter();
public static Parser getXMLData() {
return data;
}
public static void setXMLData(Parser data) {
XMLHandler.data = data;
}
/**
* This will be called when the tags of the XML starts.
**/
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
/**It´s a good practice to reset the CharArrayWriter when you start any element.*/
contents.reset();
if (localName.equals("CATALOG"))
{
data = new Parser();
} else if (localName.equals("CD")) {
/**
* We can get the values of attributes for eg. if the CD tag had an attribute( <CD attr= "band">Akon</CD> )
* we can get the value "band". Below is an example of how to achieve this.
*
* String attributeValue = attributes.getValue("attr");
* data.setAttribute(attributeValue);
*
* */
}
}
/**
* This will be called when the tags of the XML end.
**/
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
/**
* Sets the values after retrieving the values from the XML tags
* */
String elementValue = contents.toString().trim();
if (localName.equalsIgnoreCase("title"))
data.setTitle(elementValue);
else if (localName.equalsIgnoreCase("artist"))
data.setArtist(elementValue);
else if (localName.equalsIgnoreCase("album"))
data.setAlbum(elementValue);
else if (localName.equalsIgnoreCase("lyric"))
data.setLyric(elementValue);
else if (localName.equalsIgnoreCase("pic"))
data.setPic(elementValue);
}
/**
* This is called to get the tags value
**/
@Override
public void characters(char[] ch, int start, int length) throws SAXException {
contents.write(ch, start, length);
}
@Override
public void endDocument() throws SAXException {
Log.i(TAG, "Catalog parse finalized with success.");
}
}