lyy
8 years ago
parent
78b76f5399
commit
5f755cf7ed
@ -1,4 +1,4 @@ |
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package com.arialyy.downloadutil; |
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package com.arialyy.downloadutil.core; |
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import android.content.Context; |
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@ -1,33 +1,69 @@ |
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package com.arialyy.downloadutil.core; |
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import com.arialyy.downloadutil.core.inf.IDownloader; |
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import com.arialyy.downloadutil.core.inf.ITask; |
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import com.arialyy.downloadutil.core.pool.CachePool; |
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import com.arialyy.downloadutil.core.pool.ExecutePool; |
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/** |
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* Created by lyy on 2016/8/16. |
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* 任务下载器，提供抽象的方法供具体的实现类操作 |
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* Created by lyy on 2016/8/17. |
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* 下载任务调度类 |
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*/ |
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public abstract class DownloadTarget implements IDownloader, ITask { |
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protected CachePool mCachePool = CachePool.getInstance(); |
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protected ExecutePool mExecutePool = ExecutePool.getInstance(); |
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/** |
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* 获取当前运行的任务数 |
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* |
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* @return 当前正在执行的任务数 |
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*/ |
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public int getCurrentTaskNum() { |
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return mExecutePool.size(); |
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} |
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/** |
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* 获取缓存任务数 |
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* |
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* @return 获取缓存的任务数 |
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*/ |
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public int getCacheTaskNum() { |
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return mCachePool.size(); |
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public class DownloadTarget extends IDownloadTarget { |
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private static final Object LOCK = new Object(); |
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private static volatile DownloadTarget INSTANCE = null; |
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public static DownloadTarget getInstance() { |
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if (INSTANCE == null) { |
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synchronized (LOCK) { |
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INSTANCE = new DownloadTarget(); |
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} |
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} |
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return INSTANCE; |
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} |
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private DownloadTarget() { |
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} |
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@Override |
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public void startTask(Task task) { |
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} |
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@Override |
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public void stopTask(Task task) { |
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} |
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@Override |
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public void cancelTask(Task task) { |
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} |
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@Override |
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public void reTryStart(Task task) { |
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} |
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@Override |
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public void createTask(String downloadUrl, String downloadPath) { |
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} |
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@Override |
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public Task getTask(String downloadUrl) { |
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return null; |
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} |
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@Override |
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public int getTaskState(String downloadUrl) { |
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return 0; |
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} |
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@Override |
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public void removeTask(String downloadUrl) { |
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} |
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@Override |
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public Task getNextTask() { |
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return null; |
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} |
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} |
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@ -0,0 +1,201 @@ |
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package com.arialyy.downloadutil.core; |
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import android.os.Handler; |
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import android.os.Message; |
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import android.util.Log; |
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import com.arialyy.downloadutil.core.inf.IDownloader; |
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import com.arialyy.downloadutil.core.inf.ITask; |
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import com.arialyy.downloadutil.core.pool.CachePool; |
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import com.arialyy.downloadutil.core.pool.ExecutePool; |
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import com.arialyy.downloadutil.entity.DownloadEntity; |
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/** |
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* Created by lyy on 2016/8/16. |
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* 任务下载器，提供抽象的方法供具体的实现类操作 |
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*/ |
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public abstract class IDownloadTarget implements IDownloader, ITask { |
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/** |
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* 任务开始 |
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*/ |
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public static final int START = 1; |
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/** |
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* 任务停止 |
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*/ |
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public static final int STOP = 2; |
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/** |
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* 任务失败 |
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*/ |
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public static final int FAIL = 3; |
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/** |
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* 任务取消 |
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*/ |
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public static final int CANCEL = 4; |
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/** |
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* 任务完成 |
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*/ |
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public static final int COMPLETE = 5; |
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protected CachePool mCachePool = CachePool.getInstance(); |
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protected ExecutePool mExecutePool = ExecutePool.getInstance(); |
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protected AutoTaskHandler mTaskHandler; |
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/** |
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* 下载失败次数 |
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*/ |
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protected int mFailNum = 10; |
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/** |
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* 超时时间 |
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*/ |
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protected long mTimeOut = 10000; |
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/** |
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* 下载器任务监听 |
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*/ |
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private OnTargetListener mTargetListener; |
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/** |
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* Target处理任务监听 |
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*/ |
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public interface OnTargetListener { |
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/** |
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* 任务开始 |
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* |
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* @param task |
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*/ |
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public void onTaskStart(Task task); |
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/** |
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* 任务停止 |
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* |
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* @param task |
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*/ |
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public void onTaskStop(Task task); |
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/** |
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* 任务取消 |
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* |
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* @param task |
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*/ |
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public void onTaskCancel(Task task); |
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/** |
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* 任务下载失败 |
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* |
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* @param task |
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*/ |
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public void onTaskFail(Task task); |
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/** |
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* 任务完成 |
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* |
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* @param task |
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*/ |
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public void onTaskComplete(Task task); |
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} |
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protected IDownloadTarget() { |
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mTaskHandler = new AutoTaskHandler(this); |
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} |
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/** |
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* 设置下载器监听 |
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* |
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* @param targetListener {@link OnTargetListener} |
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*/ |
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public void setOnTargetListener(OnTargetListener targetListener) { |
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this.mTargetListener = targetListener; |
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} |
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/** |
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* 获取当前运行的任务数 |
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* |
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* @return 当前正在执行的任务数 |
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*/ |
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public int getCurrentTaskNum() { |
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return mExecutePool.size(); |
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} |
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/** |
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* 获取缓存任务数 |
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* |
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* @return 获取缓存的任务数 |
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*/ |
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public int getCacheTaskNum() { |
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return mCachePool.size(); |
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} |
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public void setFailNum(int mFailNum) { |
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this.mFailNum = mFailNum; |
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} |
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public void setTimeOut(long timeOut) { |
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this.mTimeOut = timeOut; |
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} |
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/** |
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* 自动处理任务停止，下载失败，取消下载，自动下载下一个任务的操作 |
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*/ |
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private static class AutoTaskHandler extends Handler { |
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private static final String TAG = "AutoTaskHandler"; |
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IDownloadTarget target; |
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public AutoTaskHandler(IDownloadTarget target) { |
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this.target = target; |
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} |
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@Override |
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public void handleMessage(Message msg) { |
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super.handleMessage(msg); |
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DownloadEntity entity = (DownloadEntity) msg.obj; |
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if (entity == null) { |
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Log.e(TAG, "请传入下载实体DownloadEntity"); |
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return; |
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} |
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switch (msg.what) { |
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case STOP: |
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startNextTask(entity); |
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break; |
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case CANCEL: |
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startNextTask(entity); |
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break; |
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case COMPLETE: |
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startNextTask(entity); |
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break; |
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case FAIL: |
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handleFailTask(entity); |
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break; |
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} |
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} |
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/** |
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* 处理下载任务下载失败的情形 |
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* |
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* @param entity 失败实体 |
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*/ |
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private void handleFailTask(DownloadEntity entity) { |
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if (entity.getFailNum() <= target.mFailNum) { |
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Task task = target.getTask(entity.getDownloadUrl()); |
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target.reTryStart(task); |
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} else { |
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startNextTask(entity); |
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} |
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} |
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/** |
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* 启动下一个任务，条件：任务停止，取消下载，任务完成 |
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* |
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* @param entity 通过Handler传递的下载实体 |
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*/ |
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private void startNextTask(DownloadEntity entity) { |
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target.removeTask(entity.getDownloadUrl()); |
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Task newTask = target.getNextTask(); |
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if (newTask == null) { |
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Log.e(TAG, "没有下一任务"); |
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return; |
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} |
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target.startTask(newTask); |
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} |
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} |
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} |
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