Android Open Source - AndroidCloud Download Task

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *// ww  w .  ja va  2 s  . c o m
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.twlkyao.kuaipan;

import java.io.File;

import com.twlkyao.androidcloud.R;

import cn.kuaipan.android.openapi.KuaipanAPI;
import cn.kuaipan.android.sdk.exception.KscException;
import cn.kuaipan.android.sdk.exception.KscRuntimeException;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Environment;
import android.util.Log;
import android.widget.Toast;

public class DownloadTask {

  private static final String TAG = "DownloadTask";
  
  // The local file path to store the downloaded file.
  private static final String DOWNLOAD_DIR = Environment.getExternalStorageDirectory().getPath()+"/kuaipanfiles/";
  
  private ProgressDialog dialog;
  private Activity activity;

  public DownloadTask(Activity activity) {
    this.activity = activity;
  }

  public void showProgressDialog() {
    dialog = new ProgressDialog(activity);
    dialog.setMessage(activity.getString(R.string.downloading));
    
    dialog.setCancelable(false);
    dialog.show();
  }

  public void hideProgressDialog() {
    if (dialog != null && dialog.isShowing()) {
      dialog.dismiss();
    }
  }

  protected void displayAlert(String title, String message) {

    AlertDialog.Builder confirm = new AlertDialog.Builder(activity);
    confirm.setTitle(title);
    confirm.setMessage(message);

    confirm.setNegativeButton(activity.getString(R.string.ok),
        new DialogInterface.OnClickListener() {

          public void onClick(DialogInterface dialog, int which) {

            dialog.dismiss();
          }
        });
    confirm.show(); // Show the dialog.
//    confirm.show().show();
  }

  protected void displayErrorAlert(String title, String message) {

    AlertDialog.Builder confirm = new AlertDialog.Builder(activity);
    confirm.setTitle(title);
    confirm.setMessage(message);

    confirm.setNegativeButton(activity.getString(R.string.ok),
        new DialogInterface.OnClickListener() {

          public void onClick(DialogInterface dialog, int which) {

            activity.finish();
          }
        });
    confirm.show(); // Show the dialog.
//    confirm.show().show();
  }
  
  public void start (RequestBase req) {
    new Download ().execute(req);
  }
  
  private class Download extends AsyncTask<RequestBase, Void, ResultBase> {

    protected void onPreExecute() {
      Log.v(TAG, "====Upload task onPreExecute====");
      showProgressDialog();
    }

    protected ResultBase doInBackground(RequestBase... params) {
      Log.v(TAG, "====Upload task doInBackground====");
      if (params == null || params.length != 1) {
        return null;
      }

      final RequestBase req = (RequestBase) params[0]; // Get the RequestBase params.
      final String remotePath = req.getRemotePath(); // Get the remote file path.
      final KuaipanAPI api = req.getApi(); // Get the api.

      ResultBase result = new ResultBase();
      
      String localPath = DOWNLOAD_DIR + new File(remotePath).getName();
      result.setRemotePath (remotePath);
      result.setFilePath(localPath);
      File dir = new File (DOWNLOAD_DIR);
      if (!dir.exists()) {
        dir.mkdir();
      }
      
      try {
        // Download the file to local.
        api.download(remotePath, localPath, "", false,
            new TransportListener(TransportListener.OPERATION_DOWNLOAD, "Download"));
      } catch (KscRuntimeException e) {
        e.printStackTrace();
        result.setErrorMsg(e.toString());
      } catch (KscException e) {
        e.printStackTrace();
        result.setErrorMsg(e.toString());
      } catch (InterruptedException e) {
        e.printStackTrace();
      }        

      Log.v(TAG, "====Download task doInBackground end====");
      return result;
    }

    protected void onPostExecute(ResultBase result) {

      hideProgressDialog ();
      if (result == null) {
        Toast.makeText(activity,
            "Please, select a file.",
            Toast.LENGTH_SHORT).show();
        return;
      }
      
      if (result.getErrorMsg() != null) {
        displayErrorAlert(
            activity.getString(R.string.download_failure_title),
            result.getErrorMsg());
      } else {
        displayAlert("Download Task Finish",
            "Download file from [" + result.getRemotePath()
                + "] "+"\n"+"to ["+result.getFilePath()+"] Successed!");
      }
    }
  }
}

Java Source Code List

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