java 追加到文件android
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append to file android
提问by Carlos Barbosa
hey there, i need to append to my file but it is not working, it keeps overwriting the file, can anyone please tell me what is wrong:
嘿，我需要附加到我的文件中，但它不起作用，它不断覆盖文件，任何人都可以告诉我出了什么问题：
public void generateNoteOnSD(String sBody){
try
{
File root = new File(Environment.getExternalStorageDirectory(), "AdidasParticipants");
if (!root.exists()) {
root.mkdirs();
}
File gpxfile = new File(root, "participants.txt");
BufferedWriter bW;
bW = new BufferedWriter(new FileWriter(gpxfile));
bW.write(sBody);
bW.newLine();
bW.flush();
bW.close();
//Toast.makeText(mContext, "Tus datos han sido guardados", Toast.LENGTH_SHORT).show();
}
catch(IOException e)
{
e.printStackTrace();
// importError = e.getMessage();
// iError();
}
}
Thanks in advance.
提前致谢。
回答by nicholas.hauschild
You can fix it by changing the line where you assign the BufferedWriter:
您可以通过更改您分配的行来修复它BufferedWriter：
bW = new BufferedWriter(new FileWriter(gpxfile, true));
When you open a file using the FileWriterconstructor that only takes in a File, it will overwrite what was previously in the file. Supplying the second parameter as truetells the FileWriterthat you want to append to the end of it.
当您使用FileWriter仅接受 a的构造函数打开文件时File，它将覆盖文件中先前的内容。提供第二个参数 astrue告诉FileWriter您要附加到它的末尾。
