delete folder recursively and check Delete_Max_Recursion_Depth - Android java.io

Android examples for java.io:Folder

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Description

delete folder recursively and check Delete_Max_Recursion_Depth

Demo Code

import java.io.File;

import android.util.Log;

public class Main {

  /**//  w  w  w  .jav a  2s . co m
   * The maximum recursion depth we allow when deleting directories
   */
  private static final int DELETE_MAX_RECURSION_DEPTH = 1;
  private static final String TAG = "";

  /**
   * Delete a file/directory
   * 
   * @param fileToDelete
   *          the file/directory to be deleted
   * @param recursive
   *          if a directory needs to be deleted with all of it's content, set
   *          this to true. please note, that recursion is currently limited to a
   *          depth of 1 subfolder
   * @return true if the file/directory was completely deleted, false otherwise
   */
  public static boolean delete(File fileToDelete, boolean recursive) {
    return delete(fileToDelete, recursive, 0);
  }

  /**
   * Delete a file/directory
   * 
   * @param fileToDelete
   *          the file/directory to be deleted
   * @param recursive
   *          if the deletion should be recursive
   * @param recursionDepth
   *          takes care of the depth of recursion and aborts deletion if
   *          DELETE_MAX_RECURSION_DEPTH is reached
   * @return
   */
  private static boolean delete(File fileToDelete, boolean recursive, int recursionDepth) {
    // if we're deeper than one recursion/subfolder, we'll cancel deletion
    if (recursionDepth > DELETE_MAX_RECURSION_DEPTH) {
      Log.w(TAG,
          "DELETE_MAX_RECURSION_DEPTH (" + DELETE_MAX_RECURSION_DEPTH + ") reached. Directory deletion aborted.");
      return false;
    }

    boolean deleted = false;

    // If it's a directory and we should delete it recursively, try to delete all
    // childs
    if (fileToDelete.isDirectory() && recursive) {
      for (File child : fileToDelete.listFiles()) {
        if (!delete(child, true, recursionDepth + 1)) {
          Log.w(TAG, "deletion of [" + child + "] failed, aborting now...");
          return false;
        }
      }
    }

    deleted = fileToDelete.delete();
    boolean isDir = fileToDelete.isDirectory();
    if (deleted) {
      Log.i(TAG, "deleted " + (isDir ? "directory" : "file") + " [" + fileToDelete + "]");
    } else {
      Log.w(TAG, "unable to delete " + (isDir ? "directory" : "file") + " [" + fileToDelete + "]");
    }

    return deleted;
  }
}

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