数据持久化_文件存储

 * 文件名 为 data
 * @param inputText
 */
private void (String inputText) {
    FileOutputStream out = null;
    BufferedWriter writer = null;
    try {
        out = openFileOutput("data", Context.MODE_PRIVATE);
        writer = new BufferedWriter(new OutputStreamWriter(out));
        writer.write(inputText);
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (writer != null) {
                writer.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

public String load(){
    FileInputStream in = null;
    BufferedReader reader = null;
    StringBuilder content = new StringBuilder();

    try {
        // openFileInput 获取 FileInputStream 对象
        in = openFileInput("data");
        // 构建 BufferedReader 对象
        reader = new BufferedReader(new InputStreamReader(in));
        String line = "";
        // 一行行的读, 读到的内容存在 StringBuilder 中
        while ((line = reader.readLine()) != null) {
            content.append(line);
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return content.toString();
}