问题

为什么这段代码是我的白线绘图问题,问题是什么 有没有办法替换它?

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

这行代码是用白线方法绘制的 getExternalStoragePublicDirectory

  最佳答案

getExternalStoragePublicDirectory() – > Deprecated in API 级别29

为了改善用户隐私,直接访问共享/外部存储 设备被弃用.当应用程序针对Build.VERSION_CODES.Q时, 从此方法返回的路径不再直接访问 应用程序.应用程序可以继续访问存储在共享/外部的内容 迁移到替代品,例如 Context#getExternalFilesDir(String) ,MediaStore,或 意图#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);
    }
}
 

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