Question

为什么此代码是我的白线绘制问题什么问题有办法替换它吗？

File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC);

正是这一行代码是用白线方法绘制的 getExternalStoragePublicDirectory

Answer 1

getExternalStoragePublicDirectory()-> ~~已弃用~~ ，在API级别29

要改善用户隐私，请直接访问共享/外部存储设备已弃用。当应用定位到Build.VERSION_CODES.Q时，从此方法返回的路径不再可直接访问应用。应用程序可以继续访问共享/外部存储的内容通过迁移到诸如 Context#getExternalFilesDir(String)，MediaStore或 Intent＃ACTION_OPEN_DOCUMENT。

void createExternalStoragePrivateFile() {
    // Create a path where we will place our private file on external
    // storage.
    File file = new File(getExternalFilesDir(null), "DemoFile.jpg");

    try {
        // Very simple code to copy a picture from the application's
        // resource into the external file.  Note that this code does
        // no error checking, and assumes the picture is small (does not
        // try to copy it in chunks).  Note that if external storage is
        // not currently mounted this will silently fail.
        InputStream is = getResources().openRawResource(R.drawable.balloons);
        OutputStream os = new FileOutputStream(file);
        byte[] data = new byte[is.available()];
        is.read(data);
        os.write(data);
        is.close();
        os.close();
    } catch (IOException e) {
        // Unable to create file, likely because external storage is
        // not currently mounted.
        Log.w("ExternalStorage", "Error writing " + file, e);
    }
}

这段代码过时了吗？ getExternalStoragePublicDirectory（）

1 个答案: