#android-multithread
##Introduction
android lib - multithread
add a listener to the AsyncTask.
##System requirements Android 1.5+
##Dependencies android-log https://github.com/snowdream/android-log
##Download Download the latest jar or grab via Maven:
<dependency>
<groupId>com.github.snowdream.android.util.concurrent</groupId>
<artifactId>multithread</artifactId>
<version>1.0</version>
</dependency>or Gradle:
compile 'com.github.snowdream.android.util.concurrent:multithread:1.0'##Usage 1.inherit a class from com.github.snowdream.android.util.concurrent.AsyncTask,explicit inherit the construction from the super class.
//inherit a class from com.github.snowdream.android.util.concurrent.AsyncTask
public class DownloadFilesTask extends AsyncTask<URL, Integer, Long> {
public DownloadFilesTask(TaskListener<Integer, Long> listener) {
//explicit inherit the construction from the super class.
super(listener);
}
/**
* TODO
* if error occurs,carry it out.
*
* if (listener != null) {
* listener.onError(new Throwable());
* }
*/
protected Long doInBackground(URL... urls) {
int count = urls.length;
long totalSize = 0;
for (int i = 0; i < count; i++) {
totalSize += 10;
publishProgress((int) ((i / (float) count) * 100));
// Escape early if cancel() is called
if (isCancelled()) break;
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
return totalSize;
}
}2.define a TaskListener.please pay attention to the generic parameter Integer and Long,is the same as above.
private TaskListener<Integer, Long> listener = new TaskListener<Integer, Long>(){
@Override
public void onStart() {
super.onStart();
Log.i("onStart()");
}
@Override
public void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
Log.i("onProgressUpdate(values)" + values[0] );
}
@Override
public void onSuccess(Long result) {
super.onSuccess(result);
Log.i("onSuccess(result)" + result);
}
@Override
public void onCancelled() {
super.onCancelled();
Log.i("onCancelled()");
}
@Override
public void onError(Throwable thr) {
super.onError(thr);
Log.i("onError()");
}
@Override
public void onFinish() {
super.onFinish();
Log.i("onFinish()");
}
};3.construct a AsyncTask,and carry it out.
URL url = null;
try {
url = new URL("http://www.baidu.com/");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
new DownloadFilesTask(listener).execute(url,url,url);##License
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.
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