Android Open Source - Alfred4Android File Scanner Service

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License

The source code is released under:
Apache License
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Java Source Code

package com.toraleap.collimator.bll;
/*from  w ww. j  a  v a2  s . com*/
import java.io.File;
import java.util.ArrayList;
import java.util.Stack;

import android.app.Service;
import android.content.Intent;
import android.os.Environment;
import android.os.IBinder;
import android.util.Log;

import com.toraleap.collimator.dal.DBOperation;
import com.toraleap.collimator.model.BaseTag;
import com.toraleap.collimator.util.RecursiveFileObserver;

public class FileScannerService extends Service {
  private RealtimeScanner mScanner;
  private DBOperation mDBOperator;
  
  @Override
  public void onCreate() {
    super.onCreate();
    Log.e("COLLIMATOR", "Service launched.");
    mDBOperator = new DBOperation(getApplicationContext());
//    new Thread(new Runnable(){
//      public void run() {
//        scanAll();
//      }
//    }).start();
    //launchObserver();
  }
  
  @Override
  public void onDestroy() {
    stopObserver();
    mDBOperator.close();
    super.onDestroy();
  }

  @Override
  public IBinder onBind(Intent intent) {
    return null;
  }
  
  public void scanFile(File file) {
    if (file.exists()) {
      Log.e("SCANFILE", file.getPath());
      if (mDBOperator.isFileExists(file)) {
        Log.e("UPDATEFILE", file.getPath());
        updateFile(file);
      } else {
        Log.e("INSERTFILE", file.getPath());
        insertFile(file);
      }
    } else {
      if (mDBOperator.isFileExists(file)) {
        Log.e("REMOVEFILE", file.getPath());
        removeFile(file);
      }
    }
  }
  
  /**
   * ???????SD????????????????
   */
  public void scanAll() {
    if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
      return;
    }
    // ???????
    Stack<String> stack = new Stack<String>();
    stack.push(Environment.getExternalStorageDirectory().getPath());
    // ??????????
    while (!stack.isEmpty()) {
      String parent = stack.pop();
      String parentAlpha = null;
      File path = new File(parent);
      File[] files = path.listFiles();
      if (null == files) continue;
      for (File f : files)
      {
        if (f.isDirectory()) {
          if (isQualifiedDirectory(f)) stack.push(f.getPath());
        }
        else {
          if (isQualifiedFile(f)) {
            scanFile(f);
          }
        }
      }
    }
    }
  
  /**
   * ????????????????????????????
   * @param file  ????????????????
   * @return ????????
   */
  private boolean isQualifiedDirectory(File file) {
    if (file.getName().equals(".") || file.getName().equals("..")) return false;
//    if (!isIndexDotPrefix && file.getName().startsWith(".")) return false;
//    if (!isIndexHidden && file.isHidden()) return false;
//    if (!isIndexSystem && blackList.contains(file.getPath().toLowerCase())) return false;
//    if (new File(file.getPath(), ".nomedia").exists()) return false;
    return true;
  }
  
  /**
   * ???????????????????????
   * @param file  ???????????????
   * @return ??????????
   */
  private boolean isQualifiedFile(File file) {
//    if (!isIndexDotPrefix && file.getName().startsWith(".")) return false;
//    if (!isIndexHidden && file.isHidden()) return false;
//    if (!isIndexAllType && FileInfo.mimeType(file.getName()).equals("*.*")) return false;
    return true;
  }
  
  public void insertFile(File file) {
    ArrayList<BaseTag> tags = TagGenerator.generate(file.getPath());
    mDBOperator.insertFile(file, tags);
  }
  
  public void updateFile(File file) {
    if (mDBOperator.isFileModified(file)) {
      ArrayList<BaseTag> tags = TagGenerator.generate(file.getPath());
      mDBOperator.updateFile(file, tags);
    }
  }
  
  public void removeFile(File file) {
    mDBOperator.removeFile(file);
  }
  
  private void launchObserver() {
    stopObserver();
    mScanner = new RealtimeScanner(Environment.getExternalStorageDirectory().getPath());
    mScanner.startWatching();
  }
  
  private void stopObserver() {
    if (mScanner != null) mScanner.stopWatching();
  }

  public class RealtimeScanner extends RecursiveFileObserver {

    public RealtimeScanner(String path) {
      super(path, CHANGES_ONLY);
    }

    @Override
    public void onEvent(int event, String path) {
      super.onEvent(event, path);
      switch (event) {
        case CREATE:
        case CLOSE_WRITE:
        case MOVED_FROM:
        case MOVED_TO:
        case DELETE:
          scanFile(new File(path));
          break;
      }
    }
    
  }
}
Java Source Code List
