I know that many question has been answered, but in my case my code is working properly on Oppo, samsung phone but not work on MI, MOto G, Lenavo phone
my code is hear:
this String retu path of secondary SD card:
public static String getExtealStorage() {
File rootFolder = new File("/");
boolean isSdcardRemovable = false;
String path = null;
loop: for (int i = 0; i < rootFolder.listFiles().length; i++) {
if (rootFolder.listFiles()[i].listFiles() != null
&& !rootFolder.listFiles()[i].toString().contains("system")
&& !rootFolder.listFiles()[i].toString().contains("etc")
&& !rootFolder.listFiles()[i].toString().contains("dev")) {
File dataDir = new File(Environment.getDataDirectory()
.getAbsolutePath());
long dataDirSize = dataDir.getFreeSpace() / (1000 * 1000);
long folderSize = rootFolder.listFiles()[i].getFreeSpace()
/ (1000 * 1000);
if (dataDirSize == folderSize
|| (dataDirSize > folderSize && folderSize > (dataDirSize - 80))) {
System.err
.println("INTERNAL1 " + rootFolder.listFiles()[i]);
System.err.println(dataDirSize);
System.err.println(folderSize);
} else {
File rootSubFolder1 = new File(
rootFolder.listFiles()[i].getAbsolutePath());
if (rootSubFolder1.listFiles() != null) {
for (int j = 0; j < rootSubFolder1.listFiles().length; j++) {
if (rootSubFolder1.listFiles()[j].getTotalSpace() != 0
&& rootSubFolder1.listFiles()[j]
.getFreeSpace() != 0
&& rootSubFolder1.listFiles()[j]
.listFiles() != null) {
Debug.i("fromGetExtealStorage", ""
+ rootSubFolder1.listFiles()[j]);
if (rootSubFolder1.listFiles()[j].toString()
.contains("sdcard")
|| rootSubFolder1.listFiles()[j]
.toString().contains("storage")
|| rootSubFolder1.listFiles()[j]
.toString().contains("mnt")) {
folderSize = rootSubFolder1.listFiles()[j]
.getFreeSpace() / (1000 * 1000);
if (dataDirSize == folderSize
|| (dataDirSize > folderSize && folderSize > (dataDirSize - 80))) {
System.err
.println("INTERNAL2 "
+ rootSubFolder1
.listFiles()[j]);
System.err.println(dataDirSize);
System.err.println(folderSize);
} else {
int pos = rootSubFolder1.listFiles()[j]
.getAbsolutePath().lastIndexOf(
'/');
String str = rootSubFolder1.listFiles()[j]
.getAbsolutePath().substring(
pos + 1);
if (str.matches("(sd|ext|3039|m_exteal_sd).*")) {
isSdcardRemovable = true;
System.err.println("EXTERNAL "
+ rootSubFolder1
.listFiles()[j]);
System.err.println(dataDirSize);
System.err.println(folderSize);
path = rootSubFolder1.listFiles()[j]
.getAbsolutePath() + "/";
break loop;
}
}
}
}
}
}
}
}
}
if (isSdcardRemovable) {
if (path != null) {
Debug.i("new Path from getExteal Storage", path);
} else {
Debug.i("fail", "Exteal memory not found.");
}
} else {
Debug.i("fail", "Exteal memory not available.");
}
retu path;
}`
And this Code that I use path and copy file:
OutputStream OS = new FileOutputStream(path + File.separator + "name.txt");