将音频保存到SD卡

Question

我一直在寻找保存音频到SdCard。

File dir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC) + "/AUDIO/");
        boolean success1;
        if (!dir.exists()) {

            MessageSystem("SAVING FOLDER: " + dir + " -- DON'T EXISTS ");

            //CASE NOT -  We create
            success1 = dir.mkdir();


            if (success1) {
                // Do something on success
                MessageSystem("foldersd: " + dir.toString() +  " CREATED!!");


            } else {
                // Do something else on failure
                MessageSystem("foldersd: " + dir.toString() +  " NOT CREATED!!");

            }

        }

我还试图保存以下内容：

        File dir = new File(Environment.getExternalStorageDirectory() + "/AUDIO/");

在这两种情况下，它都起作用，但会保存到内部存储中。从不使用SD卡

我使用getExternalFilesDirs（）来创建。但如果用户卸载应用程序，则会丢失文件。

我不想那样。

如何将音频保存在SD卡公用文件夹中或创建新文件夹。

任何时候它都会创建到内部存储中。

有什么解决办法吗？？？

我尝试了这个，我可以在SD卡中创建一个文档。还有一个空的。现在我想保存一个MediaRecorder音频到它。但我需要这条路。我怎样才能得到它？

Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType("application/mpeg");
        intent.putExtra(Intent.EXTRA_TITLE, audio_name);

        // Optionally, specify a URI for the directory that should be opened in
        // the system file picker when your app creates the document.
        intent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, pickerInitialUri);

        startActivityForResult(intent, CREATE_FILE);

Answer 1

你可以试试这个，

public static final String DEFAULT_STORAGE_LOCATION = "/sdcard/AudioRecording";

File dir = new File(DEFAULT_STORAGE_LOCATION);

if (!dir.exists()) {
try {
    dir.mkdirs();
} catch (Exception e) {
    Log.e("CallRecorder", "RecordService::makeOutputFile unable to create directory " + dir + ": " + e);
    Toast t = Toast.makeText(getApplicationContext(), "CallRecorder was unable to create the directory " + dir + " to store recordings: " + e, Toast.LENGTH_LONG);
    t.show();
    return null;
}
} else {
if (!dir.canWrite()) {
    Log.e(TAG, "RecordService::makeOutputFile does not have write permission for directory: " + dir);
    Toast t = Toast.makeText(getApplicationContext(), "CallRecorder does not have write permission for the directory directory " + dir + " to store recordings", Toast.LENGTH_LONG);
    t.show();
    return null;
}

您可以通过以下方式查询系统来获取sd卡位置：，

Environment.get外部存储目录（）；

别忘了添加用户权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>