Android Storing Files in Internal & External Storage Fetch Device Directory :
Example
First Add Storage permission to read/fetch device directory.
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
Create model class
//create one directory model class
//to store directory title and type in list
public class DirectoryModel {
String dirName;
int dirType; // set 1 or 0, where 0 for directory and 1 for file.
public int getDirType() {
return dirType;
}
public void setDirType(int dirType) {
this.dirType = dirType;
}
public String getDirName() {
return dirName;
}
public void setDirName(String dirName) {
this.dirName = dirName;
}
}
Create list using directory model to add directory data.
//define list to show directory
List<DirectoryModel> rootDir = new ArrayList<>();
Fetch directory using following method.
//to fetch device directory
private void getDirectory(String currDir) { // pass device root directory
File f = new File(currDir);
File[] files = f.listFiles();
if (files != null) {
if (files.length > 0) {
rootDir.clear();
for (File inFile : files) {
if (inFile.isDirectory()) { //return true if it's directory
// is directory
DirectoryModel dir = new DirectoryModel();
dir.setDirName(inFile.toString().replace("/storage/emulated/0", ""));
dir.setDirType(0); // set 0 for directory
rootDir.add(dir);
} else if (inFile.isFile()) { // return true if it's file
//is file
DirectoryModel dir = new DirectoryModel();
dir.setDirName(inFile.toString().replace("/storage/emulated/0", ""));
dir.setDirType(1); // set 1 for file
rootDir.add(dir);
}
}
}
printDirectoryList();
}
}
Print directory list in log.
//print directory list in logs
private void printDirectoryList() {
for (int i = 0; i < rootDir.size(); i++) {
Log.e(TAG, "printDirectoryLogs: " + rootDir.get(i).toString());
}
}
Usage
//to Fetch Directory Call function with root directory.
String rootPath = Environment.getExternalStorageDirectory().toString(); // return ==> /storage/emulated/0/
getDirectory(rootPath );
To fetch inner files/folder of specific directory use same method just change argument, pass the current selected path in argument and handle response for same.
To get File Extension :
private String getExtension(String filename) {
String filenameArray[] = filename.split("\\.");
String extension = filenameArray[filenameArray.length - 1];
Log.d(TAG, "getExtension: " + extension);
return extension;
}
