写入现有的 .txt 文件

Question

如何写入现有的 .txt 文件？我尝试了多种方法，我已经停止了这个：

 private void writeToFile(String data) {
    try {

        File file = new File(infoDirectory, txtName);
        FileOutputStream fOut = new FileOutputStream(file);
        OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut);
        myOutWriter.append(data);
        myOutWriter.close();
        fOut.close();

    }
    catch (IOException e) {
        Log.i("Debug", "File write failed: " + e.toString());
    }
}

但是它没有向文件中添加字符串，而是重新写入内部。

[更新]

private void writeToFile(String data) {
    try {
        File file = new File(infoDirectory, txtName);
        FileWriter append = new FileWriter(file, true);
        BufferedWriter output = new BufferedWriter(append);

        output.write(data);

    }
    catch (IOException e) {
        Log.i("Debug", "File write failed: " + e.toString());
    }
}

[工作代码]

private void writeToFile(String data) {
        try {

            File file = new File(infoDirectory, txtName);
            FileOutputStream fOut = new FileOutputStream(file,true);
            OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut);
            myOutWriter.append(data);
            myOutWriter.close();
            fOut.close();
        }
        catch (IOException e) {
            Log.i("Debug", "File write failed: " + e.toString());
        }
    }

Answer 1

您必须以附加模式打开文件，这可以通过使用

FileWriter(String fileName, boolean append) 构造函数。

替换此行

FileOutputStream fOut = new FileOutputStream(file);

到

FileOutputStream fOut = openFileOutput("yourfile.txt", MODE_APPEND);

希望对您有所帮助。

写入现有的 .txt 文件

Write in existing .txt file

java

android

android-file