Android 程序重启时文件被覆盖
我正在尝试将一些数据写入文件。然而，每次我重新启动程序时，我认为它会覆盖原始文件（制作一个新文件？）这是我实例化事物的代码片段。我可以更改一些内容以使文件不会每次都被覆盖吗？类似 if file.doesExist??
try {
File root = Environment.getExternalStorageDirectory();
if(root.canWrite()){
File highscoresFile = new File(root, "names.txt");
FileWriter writer = new FileWriter(highscoresFile);
BufferedWriter out = new BufferedWriter(writer);
//out.newLine();
out.append(name);
out.close();
}
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
I am trying to write out some data to a file. However, every time I restart my program, I think it is overwriting the original file (making a new one?) Here is a snippet of code where I instantiate things. Is there something I can change so that the file doesn't get overwritten everytime? something like if file.doesExist??
try {
File root = Environment.getExternalStorageDirectory();
if(root.canWrite()){
File highscoresFile = new File(root, "names.txt");
FileWriter writer = new FileWriter(highscoresFile);
BufferedWriter out = new BufferedWriter(writer);
//out.newLine();
out.append(name);
out.close();
}
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
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您可能会覆盖该文件。您可以使用不同的构造函数将 FileWriter 附加到文件末尾。
相反，使用
末尾的布尔值告诉您是否附加到文件末尾。
You are likely overwriting the file. You can append to the end of the file with the FileWriter by using a different constructor.
Instead use
The boolean at the end tells you whether or not to append to the end of the file.