我正在做一个新的安卓应用程序。我想在 sdcard 中的“Android”文件夹中创建一个文件夹。在此之前,我想检查该文件夹是否具有读/写权限。我怎么能得到那个?谁能帮我做到这一点。
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27248 次
2 回答
16
你用老式的 java 方式来做。创建一个文件对象并调用canWrite()
and canRead()
。
File f = new File("path/to/dir/or/file");
if(f.canWrite()) {
// hell yeah :)
}
于 2013-02-10T12:34:00.117 回答
6
要在 Android 文件夹中创建文件夹,最好的方法是:
File path = getExternalFilesDir();
这将是您自己的目录,因此如果您对此有权限,如果外部存储可用,您将能够读/写它。要检查这一点,请使用以下代码:
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;
}
编写所需的权限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
于 2013-02-10T13:30:58.580 回答