我的目标是能够将尽可能多的高分从我的应用程序保存到我使用 FileOutputStream 创建的文本文件中。然后我希望能够从文件中读取并将每一行放入一个数组列表项中。在使用 InputStreamReader 时，我能够将文本文件中的所有文本行加载到变量 s 中。我现在的问题是我想从文本文件中取出每一行并将其保存到数组列表项中。我将如何做到这一点？
Example string variables for high scores:
String myStr = "Ryan 150 hard \n";
String myStr2 = "Andrew 200 Medium \n";
public void saveClick(){
try{
//String myNum = Integer.toString(life);
FileOutputStream fOut = openFileOutput("storetext.txt", Context.MODE_PRIVATE);
OutputStreamWriter outputWriter = new OutputStreamWriter(fOut);
outputWriter.write(myStr);
outputWriter.write(myStr2);
outputWriter.close();
/*OutputStreamWriter out = new OutputStreamWriter(openFileOutput(STORETEXT, 0));
out.write(life);
out.close();*/
Toast.makeText(getApplicationContext(), "Save Successful", Toast.LENGTH_LONG).show();
}
catch(Throwable t){
Toast.makeText(getApplicationContext(), "Save Unsuccessful", Toast.LENGTH_LONG).show();
}
}
public void readFileInEditor(){
try{
FileInputStream fileIn = openFileInput("storetext.txt");
InputStreamReader InputRead = new InputStreamReader(fileIn);
char [] inputBuffer = new char[READ_BLOCK_SIZE];
String s = "";
int charRead;
while ((charRead=InputRead.read(inputBuffer))>0){
//char to string conversion
String readString = String.copyValueOf(inputBuffer,0,charRead);
s += readString;
}
InputRead.close();
Toast.makeText(getApplicationContext(), "New Text: " + s , Toast.LENGTH_LONG).show();
//myText.setText("" + s);
try{
//life = Integer.parseInt(s);
//Toast.makeText(getApplicationContext(), "My Num: " + life , Toast.LENGTH_LONG).show();
}
catch(NumberFormatException e){
//Toast.makeText(getApplicationContext(), "Could not get number" + life , Toast.LENGTH_LONG).show();
}
}
catch(java.io.FileNotFoundException e){
//have not created it yet
}
catch(Throwable t){
Toast.makeText(getApplicationContext(), "Exception: "+t.toString(), Toast.LENGTH_LONG).show();
}
}
为了让您的生活更轻松，最好使用（1）BufferedReader::readline()方法或（2）Scanner::nextLine()方法。并将每一行添加到List<String>for 循环中的 a 。
一个简单的例子：
List<String> lines = new ArrayList<>();
String curLine = null;
BufferedReader reader = new BufferedReader(new FileReader("storetext.txt"));
while ((curLine = reader.readLine()) != null) {
lines.add(curLine);
}
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