package bcoder.com.androidfunctiontestapplication.utils;
import android.util.Log;
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Stack;
public class FileScanner {
public static final String LOG_TAG = "FileScanner";
public ArrayList<String> mFileList = new ArrayList<>();
private boolean mIsRunning = true;
public int scanFiles(String path){
mFileList.clear();
File file = new File(path);
Stack<File> folderStack = new Stack<>();
folderStack.push(file);
long starttime = System.currentTimeMillis();
while (!folderStack.empty()){
if(!mIsRunning){
break;
}
file = folderStack.pop();
File[] files = file.listFiles();
// 内部排序
Arrays.sort(files, new Comparator<File>() {
@Override
public int compare(File o1, File o2) {
return o1.getName().toLowerCase().compareTo(o2.getName().toLowerCase());
}
});
for(int i = 0; i < files.length; i++){
String fullfilepath = files[i].getAbsolutePath();
if(files[i].isDirectory() && !"./".equals(files[i].getName())){
folderStack.push(files[i]);
mFileList.add(fullfilepath);
} else {
mFileList.add(fullfilepath);
}
}
}
long timeuse = System.currentTimeMillis() - starttime;
Log.d(LOG_TAG, String.format("TimeUse: %d", timeuse));
Arrays.sort(mFileList.toArray());
// 外部排序
mFileList.sort(new Comparator<String>() {
@Override
public int compare(String o1, String o2) {
return o1.compareTo(o2);
}
});
Log.d(LOG_TAG, String.format("File count: %d", mFileList.size()));
// for(int i = 0; i < mFileList.size(); i++){
// Log.d(LOG_TAG, mFileList.get(i));
// }
return mFileList.size();
}
public void stopScan(){
mIsRunning = false;
}
}
