5
我正在学习android应用程序开发课程，并试图创建一个xml文件并将其写入android的内部存储。就方法而言，我最初如何设置这个问题存在问题。我写了大部分，但有错误，我不明白。也许因为我整天都在做这件事，我不知道。这是我的这个类的代码。我得到的错误是公共字符串宝藏和FileOutputStream上的非法修饰符。任何帮助，将不胜感激。Android创建和向文件写入xml
好吧，我想出了最初的问题，需要使用try/catch。能够运行，一切正常，直到我到了保存文件。立即获取错误：
SoundPool error loading/system./media./audio./ui/KeypressReturn.ogg.
AudioService Soundpool could not load file: /system/media/audio/ui/KeypressReturnj.ogg
这是在“创建文件”写入日志之后。我猜它试图写入错误的文件？需要写入/数据/数据。我的应用中没有音频。我已经添加下面的新代码：
旧代码：
public void onSaveTreasureClick(View v) throws FileNotFoundException{
Log.v("SaveTreasure","Button was clicked");
File f = new File(getFilesDir(),"treasure.xml");
FileOutputStream myFile=openFileOutput(f);
Log.v("WriteFile","file created");
private FileOutputStream openFileOutput(File f) {
// TODO Auto-generated method stub
return null;
}
public String treasures(Treasure treasure) throws Exception{
XmlSerializer xmlSerializer = Xml.newSerializer();
StringWriter write = new StringWriter();
final EditText tres=(EditText) findViewById(R.id.treasureNametxt);
String treasureName=tres.getText().toString();
final EditText c1=(EditText) findViewById(R.id.clue1Txt);
String clue1=c1.getText().toString();
final EditText c2=(EditText) findViewById(R.id.clue2Txt);
String clue2=c2.getText().toString();
final EditText c3=(EditText) findViewById(R.id.clue3Txt);
String clue3=c3.getText().toString();
final EditText ans=(EditText) findViewById(R.id.answerTxt);
String answer = ans.getText().toString();
final EditText loc =(EditText) findViewById(R.id.locationTxt);
String location = loc.getText().toString();
final EditText pv=(EditText) findViewById(R.id.pointValueTxt);
String pointValue=pv.getText().toString();
xmlSerializer.setOutput(write);
//start Document
xmlSerializer.startDocument("UTF-8",true);
//open tag <items>
xmlSerializer.startTag("", "Items");
xmlSerializer.startTag("", "Treasures");
xmlSerializer.startTag("", "TreasureName");
xmlSerializer.attribute("", TreasureName, treasureName);
xmlSerializer.endTag("", "TreasureName");
xmlSerializer.startTag("", "Clue1");
xmlSerializer.attribute("", "Clue1", clue1);
xmlSerializer.endTag("", "Clue1");
xmlSerializer.startTag("", "Clue2");
xmlSerializer.attribute("", "Clue2", clue2);
xmlSerializer.endTag("", "Clue2");
xmlSerializer.startTag("", "Clue3");
xmlSerializer.attribute("", "Clue3", clue3);
xmlSerializer.endTag("", "Clue3");
xmlSerializer.startTag("", "answer");
xmlSerializer.attribute("", "answer", answer);
xmlSerializer.endTag("","answer");
xmlSerializer.startTag("", "location");
xmlSerializer.attribute("", "location", location);
xmlSerializer.endTag("", "location");
xmlSerializer.startTag("", "Points");
xmlSerializer.attribute("", "PointValue", pointValue);
xmlSerializer.endTag("", "Points");
xmlSerializer.endTag("","Treasures");
xmlSerializer.endTag("", "Items");
xmlSerializer.endDocument();
return treasure.toString();
}
}
}
新代码：
public void onSaveTreasureClick(View v) throws FileNotFoundException, SAXException{
Log.v("SaveTreasure","Button was clicked");
File f = new File(getFilesDir(),"treasure.xml");
FileOutputStream myFile=openFileOutput(f);
Log.v("WriteFile","file created");
// private FileOutputStream openFileOutput(File f) {
// TODO Auto-generated method stub
// return null;
// }
try{
final String treasures;
XmlSerializer xmlSerializer = Xml.newSerializer();
StringWriter writer = new StringWriter();
final EditText tres=(EditText) findViewById(R.id.treasureNametxt);
String treasureName=tres.getText().toString();
final EditText c1=(EditText) findViewById(R.id.clue1Txt);
String clue1=c1.getText().toString();
final EditText c2=(EditText) findViewById(R.id.clue2Txt);
String clue2=c2.getText().toString();
final EditText c3=(EditText) findViewById(R.id.clue3Txt);
String clue3=c3.getText().toString();
final EditText ans=(EditText) findViewById(R.id.answerTxt);
String answer = ans.getText().toString();
final EditText loc =(EditText) findViewById(R.id.locationTxt);
String location = loc.getText().toString();
final EditText pv=(EditText) findViewById(R.id.pointValueTxt);
String pointValue=pv.getText().toString();
xmlSerializer.setOutput(writer);
//start Document
xmlSerializer.startDocument("UTF-8",true);
//open tag <items>
xmlSerializer.startTag("", "Items");
xmlSerializer.startTag("", "Treasures");
xmlSerializer.startTag("", "TreasureName");
xmlSerializer.attribute("", treasureName, treasureName);
xmlSerializer.endTag("", "TreasureName");
xmlSerializer.startTag("", "Clue1");
xmlSerializer.attribute("", "Clue1", clue1);
xmlSerializer.endTag("", "Clue1");
xmlSerializer.startTag("", "Clue2");
xmlSerializer.attribute("", "Clue2", clue2);
xmlSerializer.endTag("", "Clue2");
xmlSerializer.startTag("", "Clue3");
xmlSerializer.attribute("", "Clue3", clue3);
xmlSerializer.endTag("", "Clue3");
xmlSerializer.startTag("", "answer");
xmlSerializer.attribute("", "answer", answer);
xmlSerializer.endTag("","answer");
xmlSerializer.startTag("", "location");
xmlSerializer.attribute("", "location", location);
xmlSerializer.endTag("", "location");
xmlSerializer.startTag("", "Points");
xmlSerializer.attribute("", "PointValue", pointValue);
xmlSerializer.endTag("", "Points");
xmlSerializer.endTag("","Treasures");
xmlSerializer.endTag("", "Items");
xmlSerializer.endDocument();
writer.toString();
myFile.write(writer.toString().getBytes());
}
catch (FileNotFoundException e) {
System.err.println("FileNotFoundException: " + e.getMessage());
throw new SAXException(e);
} catch (IOException e) {
System.err.println("Caught IOException: " + e.getMessage());
}
}
stacktraces ....？ – danijoo
我是新手......对不起，我不明白。 –
在模拟器上运行代码或将设备连接到计算机时，Android日志将在程序崩溃时显示堆栈跟踪。这是一系列错误日志，显示导致未捕获异常的方法链。 – Tenfour04