安卓 文件创造

private类型

• 只能本应用进行读写, 其他应用不可以访问
• 采用覆盖写的方法
• 举例

    public void save(String filename,String content) throws IOException {
        FileOutputStream outputStream = context.openFileOutput(filename, context.MODE_PRIVATE);
        outputStream.write(content.getBytes());
        outputStream.close();
    }

append

• 只能本应用进行读写, 其他应用不可以访问
• 采用追加模式写
• 代码

public void saveAppend(String filename,String content) throws IOException {
        FileOutputStream outputStream = context.openFileOutput(filename, context.MODE_APPEND);
        outputStream.write(content.getBytes());
        outputStream.close();
    }

MODE_WORLD_WRITEABLE

• 创造的文件可以被其他应用写

allow all other applications to have write access to the created file.

MODE_WORLD_READABLE

• 创造的文件可以被其他应用读

allow all other applications to have read access to the created file.

参考链接

-API: http://www.android-doc.com/reference/android/content/Context.html