com.github.snowdream.android.app.DownloadManager Maven / Gradle / Ivy
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/*
* Copyright (C) 2013 Snowdream Mobile
*
* 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.github.snowdream.android.app;
import android.app.Activity;
import android.content.Context;
import com.github.snowdream.android.app.dao.ISql;
import com.github.snowdream.android.app.dao.ISqlImpl;
import com.github.snowdream.android.util.Log;
import java.io.File;
import java.sql.SQLException;
/**
* @author snowdream
* @version v1.0
* @date Sep 29, 2013
*/
public class DownloadManager {
Context context = null;
private DownloadManager() {
}
public DownloadManager(Context context) {
this.context = context;
}
/**
* deal with the result
*
* @param message POST_MESSAGE
* @param listener DownloadListener
* @param code code
*/
@SuppressWarnings("rawtypes")
private void OnResult(final POST_MESSAGE message, final DownloadTask task, final DownloadListener listener, final Integer code) {
if (context == null || !(context instanceof Activity)) {
Log.w("The context is null or invalid!");
return;
}
((Activity) context).runOnUiThread(new Runnable() {
public void run() {
if (listener == null) {
return;
}
switch (message) {
case ADD:
listener.onAdd(task);
break;
case DELETE:
listener.onDelete(task);
break;
case START:
listener.onStart();
break;
case FINISH:
listener.onFinish();
break;
case STOP:
listener.onStop(task);
break;
case ERROR:
listener.onError(new DownloadException(code));
break;
}
}
});
}
/**
* Add Task
*
* @param task DownloadTask
* @return
*/
public void add(DownloadTask task, DownloadListener listener) {
Log.i("Add Task");
if (task == null || !task.isValid()) {
OnResult(POST_MESSAGE.ERROR, task, listener, DownloadException.DOWNLOAD_TASK_NOT_VALID);
return;
}
if (task.getContext() == null) {
task.setContext(context);
}
ISql iSql = new ISqlImpl(context);
DownloadTask temptask = null;
try {
temptask = iSql.queryDownloadTask(task);
if (temptask == null || !temptask.isValid() || !temptask.isComplete()) {
if (task.isComplete()) {
iSql.addDownloadTask(task);
OnResult(POST_MESSAGE.ADD, task, listener, -1);
Log.i("The Task is stored in the sqlite.");
} else {
task.start(context, listener, true);
}
} else {
task.setDownloadTask(temptask);
OnResult(POST_MESSAGE.ADD, task, listener, -1);
Log.i("The Task is already stored in the sqlite.");
}
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
* Delete Task
* just set the task status to DownloadStatus.STATUS_DELETED
*
* @param task DownloadTask
* @return
*/
public void delete(DownloadTask task, DownloadListener listener) {
Log.i("Delete Task");
if (task == null || !task.isValid()) {
OnResult(POST_MESSAGE.ERROR, task, listener, DownloadException.DOWNLOAD_TASK_NOT_VALID);
return;
}
if (task.getContext() == null) {
task.setContext(context);
}
switch (task.getStatus()) {
case DownloadStatus.STATUS_DELETED:
OnResult(POST_MESSAGE.DELETE, task, listener, -1);
Log.i("The Task is already Deleted.");
break;
default:
task.delete();
OnResult(POST_MESSAGE.DELETE, task, listener, -1);
break;
}
}
/**
* Delete Task
* delete the task ,and the file of the task too.
*
* @param task DownloadTask
* @return
*/
public void deleteforever(DownloadTask task, DownloadListener listener) {
Log.i("Delete Task forever");
if (task == null || !task.isValid()) {
OnResult(POST_MESSAGE.ERROR, task, listener, DownloadException.DOWNLOAD_TASK_NOT_VALID);
return;
}
if (task.getContext() == null) {
task.setContext(context);
}
ISql iSql = new ISqlImpl(context);
try {
iSql.deleteDownloadTask(task);
File file = new File(task.getPath());
if (file.exists()) {
file.delete();
OnResult(POST_MESSAGE.DELETE, task, listener, -1);
}
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
* Start Task
*
* @param task
* @param listener
* @return
*/
@SuppressWarnings("rawtypes")
public boolean start(DownloadTask task, DownloadListener listener) {
Log.i("Start Task");
boolean ret = false;
if (task == null) {
OnResult(POST_MESSAGE.ERROR, task, listener, DownloadException.DOWNLOAD_TASK_NOT_VALID);
return ret;
}
if (task.getContext() == null) {
task.setContext(context);
}
ISql iSql = new ISqlImpl(context);
DownloadTask temptask = null;
try {
temptask = iSql.queryDownloadTask(task);
if (temptask == null) {
add(task, listener);
} else if (!temptask.equals(task)) {
task.setDownloadTask(temptask);
}
switch (task.getStatus()) {
case DownloadStatus.STATUS_RUNNING:
OnResult(POST_MESSAGE.START, task, listener, -1);
OnResult(POST_MESSAGE.FINISH, task, listener, -1);
Log.i("The Task is already Running.");
break;
default:
if (listener != null) {
task.start(context, listener, false);
}
break;
}
ret = true;
} catch (SQLException e) {
e.printStackTrace();
}
return ret;
}
/**
* Stop Task
* if the task status is not
* DownloadStatus.STATUS_PAUSED,DownloadStatus.STATUS_STOPPED or
* DownloadStatus.STATUS_RUNNING, then
* exceptions(DownloadException.OPERATION_NOT_VALID) will be thrown.
*
* @param task DownloadTask
* @return
*/
public void stop(DownloadTask task, DownloadListener listener) {
Log.i("Stop Task");
if (task == null) {
OnResult(POST_MESSAGE.ERROR, task, listener, DownloadException.DOWNLOAD_TASK_NOT_VALID);
return;
}
if (task.getContext() == null) {
task.setContext(context);
}
switch (task.getStatus()) {
case DownloadStatus.STATUS_STOPPED:
OnResult(POST_MESSAGE.STOP, task, listener, -1);
Log.i("The Task is already Stopped.");
break;
case DownloadStatus.STATUS_RUNNING:
task.setStatus(DownloadStatus.STATUS_STOPPED);
ISql iSql = new ISqlImpl(context);
try {
iSql.updateDownloadTask(task);
} catch (SQLException e) {
e.printStackTrace();
}
task.stop();
OnResult(POST_MESSAGE.STOP, task, listener, -1);
break;
default:
OnResult(POST_MESSAGE.ERROR, task, listener, DownloadException.DOWNLOAD_TASK_NOT_VALID);
break;
}
}
private enum POST_MESSAGE {
ADD, DELETE, ERROR, START, STOP, FINISH
}
}
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