com.psaravan.filebrowserview.lib.AsyncTasks.AsyncDeleteTask.java Source code

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Here is the source code for com.psaravan.filebrowserview.lib.AsyncTasks.AsyncDeleteTask.java

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/*
 * 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.psaravan.filebrowserview.lib.AsyncTasks;

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.psaravan.filebrowserview.lib.Interfaces.DeleteInterface;
import com.psaravan.filebrowserview.lib.R;

import org.apache.commons.io.FileUtils;

import java.io.File;

/**
 * AsyncTask that deletes the specified file/folder recursively.
 *
 * @author Saravan Pantham
 */
public class AsyncDeleteTask extends AsyncTask<String, Void, Boolean> {

    private Context mContext;
    private ProgressDialog pd;
    private File mSourceFile;
    private boolean mShowProgress = true;
    private DeleteInterface mDeleteInterface;

    public AsyncDeleteTask(Context context, File source, boolean showProgress) {
        mContext = context;
        mSourceFile = source;
        mShowProgress = showProgress;

    }

    protected void onPreExecute() {

        if (mSourceFile == null)
            return;

        //Skip the rest of this method if the user doesn't want a progress dialog.
        if (!mShowProgress)
            return;

        pd = new ProgressDialog(mContext);
        pd.setCancelable(false);
        pd.setIndeterminate(false);
        pd.setTitle(R.string.delete);
        pd.setMessage(mContext.getResources().getString(R.string.deleting) + " " + mSourceFile.getName());
        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();

        if (mDeleteInterface != null)
            mDeleteInterface.preDeleteStartSync();

    }

    @Override
    protected Boolean doInBackground(String... params) {

        if (mDeleteInterface != null)
            mDeleteInterface.preDeleteStartAsync();

        if (mSourceFile == null) {
            if (mDeleteInterface != null)
                mDeleteInterface.onDeleteCompleteAsync(false);

            return false;
        }

        if (mSourceFile.isDirectory()) {
            try {
                FileUtils.deleteDirectory(mSourceFile);
            } catch (Exception e) {
                if (mDeleteInterface != null)
                    mDeleteInterface.onDeleteCompleteAsync(false);

                return false;
            }

        } else {
            try {
                boolean status = mSourceFile.delete();
                if (status == true) {
                    if (mDeleteInterface != null)
                        mDeleteInterface.onDeleteCompleteAsync(true);

                    return true;
                } else {
                    if (mDeleteInterface != null)
                        mDeleteInterface.onDeleteCompleteAsync(false);

                    return false;
                }

            } catch (Exception e) {
                if (mDeleteInterface != null)
                    mDeleteInterface.onDeleteCompleteAsync(false);

                return false;
            }

        }

        if (mDeleteInterface != null)
            mDeleteInterface.onDeleteCompleteAsync(true);

        return true;
    }

    @Override
    protected void onPostExecute(Boolean result) {
        super.onPostExecute(result);

        if (mDeleteInterface != null)
            mDeleteInterface.onDeleteCompleteSync(result);

        if (pd != null)
            pd.dismiss();

        if (result == true) {
            String message = mSourceFile.getName() + " " + mContext.getResources().getString(R.string.deleted);
            Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show();

        } else {
            String message = mSourceFile.getName() + " "
                    + mContext.getResources().getString(R.string.could_not_be_deleted);
            Toast.makeText(mContext, message, Toast.LENGTH_SHORT).show();

        }

    }

    /**
     * @param deleteInterface The delete interface instance to attach to this
     *                        AsyncTask.
     */
    public void setDeleteInterface(DeleteInterface deleteInterface) {
        mDeleteInterface = deleteInterface;
    }

}