我有一个应用程序,它将用户输入的数据保存到一个文件(内部存储器)中,启动时加载该文件并显示其内容。我想知道:在哪里可以找到我的文件(data.txt
)?
另外,如果我输入“Hello”然后输入“World”,当我加载文件时,我会看到“HelloWorld”在同一行上,但我想要“Hello”和“World”分别打印在两行上。
保存文件的代码:
public void writeToFile(String data) {
try {
FileOutputStream fou = openFileOutput("data.txt", MODE_APPEND);
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fou);
outputStreamWriter.write(data);
outputStreamWriter.close();
}
catch (IOException e) {
Log.e("Exception", "File write failed: " + e.toString());
}
}
加载文件:
public String readFromFile() {
String ret = "";
try {
InputStream inputStream = openFileInput("data.txt");
if ( inputStream != null ) {
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String receiveString = "";
StringBuilder stringBuilder = new StringBuilder();
while ( (receiveString = bufferedReader.readLine()) != null ) {
stringBuilder.append(receiveString);
}
inputStream.close();
ret = stringBuilder.toString();
}
}
catch (FileNotFoundException e) {
Log.e("login activity", "File not found: " + e.toString());
} catch (IOException e) {
Log.e("login activity", "Can not read file: " + e.toString());
}
return ret;
}
谢谢。
[更新]
我在每个输入之后插入了"\n":
user = (EditText) v.findViewById(R.id.username);
writeToFile(user.getText().toString() + "\n");
但是当我打印文件时,它们总是在同一行。