Java tutorial
/* * Copyright (C) 2014 Saravan Pantham * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.jams.music.player.AsyncTasks; import java.io.File; import org.apache.commons.io.FileUtils; import android.app.ProgressDialog; import android.content.Context; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.os.AsyncTask; import android.widget.Toast; import com.jams.music.player.R; import com.jams.music.player.FoldersFragment.FilesFoldersFragment; public class AsyncDeleteTask extends AsyncTask<String, Void, Boolean> { private Context mContext; private ProgressDialog pd; private FilesFoldersFragment mFragment; private File mSourceFile; private int mSourceType; public AsyncDeleteTask(Context context, FilesFoldersFragment fragment, File source, int sourceType) { mContext = context; mFragment = fragment; mSourceFile = source; mSourceType = sourceType; } protected void onPreExecute() { pd = new ProgressDialog(mContext); pd.setCancelable(false); pd.setIndeterminate(false); pd.setTitle(R.string.delete); pd.setMessage(mContext.getResources().getString(R.string.deleting_files)); pd.setButton(DialogInterface.BUTTON_NEUTRAL, mContext.getResources().getString(R.string.run_in_background), new OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { pd.dismiss(); } }); pd.show(); } @Override protected Boolean doInBackground(String... params) { if (mSourceType == FilesFoldersFragment.FOLDER) { try { FileUtils.deleteDirectory(mSourceFile); } catch (Exception e) { return false; } } else { try { boolean status = mSourceFile.delete(); if (status == true) { return true; } else { return false; } } catch (Exception e) { return false; } } return true; } @Override protected void onPostExecute(Boolean result) { super.onPostExecute(result); pd.dismiss(); if (result == true) { if (mSourceType == FilesFoldersFragment.FOLDER) Toast.makeText(mContext, R.string.folder_deleted, Toast.LENGTH_SHORT).show(); else Toast.makeText(mContext, R.string.file_deleted, Toast.LENGTH_SHORT).show(); } else { if (mSourceType == FilesFoldersFragment.FOLDER) Toast.makeText(mContext, R.string.folder_could_not_be_deleted, Toast.LENGTH_LONG).show(); else Toast.makeText(mContext, R.string.file_could_not_be_deleted, Toast.LENGTH_LONG).show(); } try { mFragment.refreshListView(); } catch (Exception e) { e.printStackTrace(); } } }