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package com.android.download;
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import android.content.Context;
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import android.text.TextUtils;
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import com.android.database.DaoManager;
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import com.android.database.lib.DownLoadTaskBean;
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import com.android.util.GsonUtil;
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import com.blankj.utilcode.util.LogUtils;
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import java.io.File;
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import java.util.List;
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public class DownLoadManeger {
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private static DownLoadManeger instance;
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private boolean isAuto = false;
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private DownloadListener mDownloadListener;
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/**
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* 网络异常码
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*/
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protected static final int ERROR_CODE_NETWORK = -1;
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/**
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* 读写异常码
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*/
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protected static final int ERROR_CODE_WRITE = -2;
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/**
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* 存储空间不够异常码
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*/
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protected static final int ERROR_CODE_STORAGE_ENOUGH = -3;
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/**
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* URL格式异常
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*/
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protected static final int ERROR_CODE_MALFORMEDURL = -4;
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public void registerDownloadListener(DownloadListener downloadListener) {
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this.mDownloadListener = downloadListener;
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}
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public void unRegisterDownloadListener(DownloadListener downloadListener) {
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this.mDownloadListener = null;
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}
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private DownLoadManeger(Context context) {
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DaoManager.initeDao(context);
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}
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public static DownLoadManeger init(Context context) {
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if (instance == null)
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instance = new DownLoadManeger(context);
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return instance;
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}
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public static DownLoadManeger getInstance() {
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return instance;
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}
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/**
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* 添加新的下载任务
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*/
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public void addDownloadTask(DownloadBuilder builder) {
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if (TextUtils.isEmpty(builder.url)) {
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return;
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}
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DownLoadTaskBean downLoadTaskBean = null;
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if (!isExistTask(builder.url)) {
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downLoadTaskBean = createTaskBean(builder);
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LogUtils.e("postServerAppUpdate--->新下载任务");
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} else {
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File file = new File(builder.path, builder.name + ".tmp");
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if (file.exists()) {
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if (file.length() == builder.total) {
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LogUtils.e("postServerAppUpdate--->该下载任务已存在并下载完成");
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return;
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} else {
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downLoadTaskBean = createTaskBean(builder);
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LogUtils.e("postServerAppUpdate--->该下载任务已存在但未完成,当前进度：" + file.length() + "--->" + builder.total);
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}
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} else {
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downLoadTaskBean = createTaskBean(builder);
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LogUtils.e("postServerAppUpdate--->该下载任务已存在并下载完成");
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}
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}
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//添加下载任务队列
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if (!TaskQueue.getInstance().isExistTask(downLoadTaskBean)) {
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TaskQueue.getInstance().add(new DownLoadTaskThread(downLoadTaskBean, observer));//添加到下载队列中
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} else {
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LogUtils.e("postServerAppUpdate--->该下载任务已存在：" + GsonUtil.GsonString(downLoadTaskBean));
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}
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}
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/**
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* 下载没有完成的任务管理
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*/
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public void restDownloadTask() {
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List<DownLoadTaskBean> list = DaoManager.getInstance().queryList(DownLoadTaskBean.class); //未完成下载的任务
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LogUtils.e("postServerAppUpdate--->restDownloadTask DownloadTask:" + GsonUtil.GsonString(list));
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if (list.size() > 0) {
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LogUtils.e("postServerAppUpdate--->start download");
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for (DownLoadTaskBean downLoadTaskBean : list) {
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//添加下载任务队列
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if (!TaskQueue.getInstance().isExistTask(downLoadTaskBean)) {
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TaskQueue.getInstance().add(new DownLoadTaskThread(downLoadTaskBean, observer));//添加到下载队列中
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}
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}
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} else {
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LogUtils.e("postServerAppUpdate--->no download task");
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}
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}
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/**
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* 清除任务队列
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*/
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public void clear() {
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TaskQueue.getInstance().clear();
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}
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public boolean isExistTask(String url) {//判断是否存在下载任务
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List<DownLoadTaskBean> downLoadTaskBeans = DaoManager.getInstance().queryByKeyList(DownLoadTaskBean.class, "url", url);
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if (downLoadTaskBeans != null && downLoadTaskBeans.size() == 1) {
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return true;
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}
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return false;
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}
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private DownLoadTaskBean createTaskBean(DownloadBuilder builder) {//创建下载任务bean和创建下载任务
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DownLoadTaskBean bean = new DownLoadTaskBean();
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bean.setFileName(builder.name);
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bean.setPath(builder.path);
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bean.setUrl(builder.url);
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bean.setTaskId(System.currentTimeMillis());
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bean.setListener(builder.listener);
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bean.setTotal(builder.total);
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bean.setMinType(builder.minType);
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bean.setTaskType(builder.taskType);
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DownLoadTaskThread task = new DownLoadTaskThread(bean, observer);
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DaoManager.getInstance().insert(DownLoadTaskBean.class, bean);//保存到数据库
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return bean;
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}
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//自动下载
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public void setAutoDownLoad(boolean isAuto) {
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this.isAuto = isAuto;
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}
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public void pauseAll() {//全部暂停
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TaskQueue.getInstance().pause();
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}
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public static class DownloadBuilder {//构造器
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protected String url;//下载地址
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protected String path;//下载路径
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protected String name;//文件名字
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protected long total;//现在总进度
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/**
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* 文件类型
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*/
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protected String minType;
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/**
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* 任务类型
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*/
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protected int taskType;
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protected DownLoadTaskBean.DownLoad2Listener listener;//下载监听
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public DownloadBuilder setMinType(String minType) {
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this.minType = minType;
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return this;
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}
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public DownloadBuilder url(String url) {
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this.url = url;
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return this;
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}
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public DownloadBuilder filePath(String path) {
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this.path = path;
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return this;
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}
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public DownloadBuilder listener(DownLoadTaskBean.DownLoad2Listener listener) {
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this.listener = listener;
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return this;
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}
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public DownloadBuilder fileName(String name) {
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this.name = name;
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return this;
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}
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public DownloadBuilder taskType(int taskType) {
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this.taskType = taskType;
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return this;
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}
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public DownloadBuilder fileTotal(long fileSize) {
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this.total = fileSize;
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return this;
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}
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}
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public interface DownloadListener {
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public void onStart(DownLoadTaskBean bean, long taskId);
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public void onError(DownLoadTaskBean bean, long taskId, String erroMsg);
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public void onProgress(DownLoadTaskBean bean, long taskId, long progress, long total);
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public void onFinish(DownLoadTaskBean bean, long taskId);
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}
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//下载线程的观察者
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private DownLoadTaskThread.DownloadTaskObserver observer = new DownLoadTaskThread.DownloadTaskObserver() {
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@Override
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protected void onStart(DownLoadTaskBean bean, long taskId) {//下载开始，回调总进度给监听，方便设置进度大小
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LogUtils.e("postServerAppUpdate--->taskId=" + taskId + ">>>>>" + bean.getTotal());
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bean.setStatus(0);
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AppExecutors.getAppExecutors().mainThread().execute(() -> {//切换到主线程
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if (bean.getListener() != null) {
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bean.getListener().onStart(bean.getTotal());
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}
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});
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}
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@Override
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protected void onProgress(DownLoadTaskBean bean, long taskId, long progress, long total) {//进度调用
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synchronized (this) {//这里必须加同步代码块，因为这共用进度等变量
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if (mDownloadListener != null) {
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mDownloadListener.onProgress(bean, taskId, progress, total);
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}
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}
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}
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@Override
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protected void onFinish(DownLoadTaskBean bean, long taskId, long lastProgress) {
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synchronized (this) {
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TaskQueue.getInstance().remove(bean);//单个任务完成删除
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// DaoManager.getInstance().delete(DownLoadTaskBean.class, bean);
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if (mDownloadListener != null) {
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mDownloadListener.onFinish(bean, taskId);
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}
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}
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}
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@Override
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protected void onPause(DownLoadTaskBean bean, long taskId, long currentProgress) {
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synchronized (this) {//暂停这里必须加上同步，不然会出现实际进度跟显示进度不一致问题，其实也就是缓存没存进去，第二个线程又来了
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// DaoManager.getInstance().update(DownLoadTaskBean.class, bean);//更新数据库，退出app再进来就不会从头下载
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}
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}
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@Override
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protected void onError(DownLoadTaskBean bean, long taskId, String erroMsg, int errorCode) {//错误提示
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TaskQueue.getInstance().remove(bean);
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switch (errorCode) {
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case ERROR_CODE_NETWORK:
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break;
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case ERROR_CODE_WRITE:
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case ERROR_CODE_MALFORMEDURL:
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case ERROR_CODE_STORAGE_ENOUGH:
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DaoManager.getInstance().delete(DownLoadTaskBean.class, bean);//删除数据库缓存
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File file = new File(bean.getPath(), bean.getFileName() + "-tmp"); //下载异常时删除临时文件
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if (file.exists()) {
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file.delete();
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}
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break;
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}
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LogUtils.e("postServerAppUpdate--->errmsg:" + erroMsg);
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if (mDownloadListener != null) {
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mDownloadListener.onError(bean, taskId, erroMsg);
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}
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}
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};
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}
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