Question

我正在将用户的语音录制到外部存储器。但是，如果用户没有手机中的SD卡，则应将保存的文件保存到内存中。

static final String PREFIX = "record";
static final String EXTENSION = ".3gpp";

if (file == null) {
                File rootDir = Environment.getExternalStorageDirectory();
                file = File.createTempFile(PREFIX, EXTENSION, rootDir);
            }

如何将同一文件保存到内存？

提前完成!!!!

Answer 1

您必须先检查外部存储卡的可用性。如果可用，则可以将文件保存在其中。还有手机记忆。

这是您使用内部存储的方式：

String FILENAME = "hello_file";
String string = "hello world!";

FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
fos.write(string.getBytes());
fos.close();

检查外部存储空间的可用性：

boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = false;
String state = Environment.getExternalStorageState();

if (Environment.MEDIA_MOUNTED.equals(state)) {
    // We can read and write the media
    mExternalStorageAvailable = mExternalStorageWriteable = true;
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
    // We can only read the media
    mExternalStorageAvailable = true;
    mExternalStorageWriteable = false;
} else {
    // Something else is wrong. It may be one of many other states, but all we need
    //  to know is we can neither read nor write
    mExternalStorageAvailable = mExternalStorageWriteable = false;
}

有关详情，请查看this

Answer 2

  Try this:

   File rootDir = Environment.getExternalStorageDirectory();

   rootDir.mkdir();

   try {
    output=File.createTempFile(PREFIX, EXTENSION, rootDir);
} catch (IOException e1) {
   e1.printStackTrace();
}

如何将记录的文件存储到android的内部存储器中？

2 个答案: