Java将记录写入文件的新行

Question

every time the code runs i want the new record to be added to a new line

as it is when a new record is added it will write over previous line

private void writeFile() {
    String FILENAME = g.getText();
    String content = results;
    FileOutputStream fos = null;
    try {
        fos = openFileOutput(FILENAME, MODE_PRIVATE);
        fos.write(content.getBytes());
        Toast.makeText(getApplicationContext(), "File Saved", 0).show();
    } catch (IOException e) {
        e.printStackTrace();
    }


}

Answer 1

You need to write the "newline" character as well when writing data:

private void writeFile() {
    String FILENAME = g.getText();
    String content = results;
    FileOutputStream fos = null;
    try {
        fos = new FileOutputStream(file);
        fos.write(content.getBytes());
        fos.write(System.getProperty("line.separator"));
    } catch (IOException e) {
        e.printStackTrace();
    }
}

But be careful with writing binary data like this. It's better to use eg BufferedWriter to write string data:

BufferedWriter writer = new BufferedWriter(new FileWriter("filename"));
writer.write("Hello world!");
writer.newLine();