/** 添加下载任务 */
public synchronized void addDownloadTask(DownTask task) {
if (curTask != null && curTask.getDownFileName().equalsIgnoreCase(task.getDownFileName())) {
downloadCallback.onDownError("下载任务正在进行...");
} else {
for (DownTask tk : dlTask) {
if (tk.getDownFileName().equalsIgnoreCase(task.getDownFileName())) {
downloadCallback.onDownError("下载任务已存在");
return;
}
}
dlTask.add(task);
}
}
/** Handler download. */
private void handlerDownload() {
if (!Util.isSD()) {
downloadCallback.onDownError("无可用SD卡");
return;
}
try {
if (dlTask.size() < 1) { // 没有下载任务
return;
}
curTask = dlTask.remove(0); // 获取第一条任务
String serviceIp = curTask.getServiceIp();
int port = curTask.getPort();
String fileName = curTask.getDownFileName();
String url;
if (Util.isEmpty(curTask.getUrl())) {
url = "http://" + serviceIp + ":" + port + "/" + fileName; // 组装成一个下载链接
} else {
url = curTask.getUrl();
}
// String url = "\"http://" + serviceIp + ":" + port + "/" + fileName +
// "\"";//组装成一个下载链接
downloadCallback.onDownStart(curTask, url);
startDownloadToSd(curTask, url); // 开始下载
} catch (Exception e) {
e.printStackTrace();
downloadCallback.onDownError(e.toString());
}
}
/** 开始下载文件到SD卡 */
private synchronized void startDownloadToSd(DownTask task, String urlDown) {
try {
// 打开连接
URL url = new URL(urlDown);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
InputStream inputStream = urlConnection.getInputStream();
// 创建本地文件
StringBuilder downFilePath =
new StringBuilder(Util.getSDPath()).append("/").append("zckj_down");
File file = new File(downFilePath.toString());
if (!file.exists()) {
file.mkdirs();
}
downFilePath.append("/").append(task.getDownFileName());
file = new File(downFilePath.toString());
file.createNewFile();
// 打开写入流
FileOutputStream fileOut = new FileOutputStream(file);
BufferedOutputStream bufferOut = new BufferedOutputStream(fileOut);
int BUFFER_SIZE = 4096;
// //解决编码问题,如地址包含空格,中文等
// String strUrl = Uri.encode(urlDown, "utf-8")
// .replaceAll("%3A", ":").replaceAll("%2F", "/");
int fileLength = urlConnection.getContentLength();
int downCount = 0;
byte[] readBuffer = new byte[BUFFER_SIZE];
int count;
long startTimeSpeed = System.currentTimeMillis(); // 保存开始下载的时间,用于计算下载速度
long startTime = startTimeSpeed;
long speed = 0; // 速率
long readSize = 0; // 一个计速周期内,读取的数据大小
while ((count = inputStream.read(readBuffer, 0, BUFFER_SIZE)) != -1) { // 开始读写数据
bufferOut.write(readBuffer, 0, count);
downCount += count;
long time = System.currentTimeMillis();
if ((time - startTimeSpeed) <= 300) { // 计算速率的时间间隔
readSize += count;
} else {
speed = (readSize * 1000) / (time - startTimeSpeed);
readSize = 0;
startTimeSpeed = time;
}
downloadCallback.onDownProgress(speed, downCount * 100 / fileLength);
}
downloadCallback.onDownEnd(
task, urlDown, file.getPath(), (System.currentTimeMillis() - startTime) / 1000);
if (task.isInstall()) {
if (!CmdUtil.installApk(file.getPath())) { // 静态安装失败,调用手动安装
downloadCallback.onDownError("静默安装失败,调用手动安装...");
CmdUtil.startInstallApk(SocketService.service, file);
} else {
downloadCallback.onDownError("静默安装成功.");
}
}
curTask = null;
bufferOut.flush();
bufferOut.close();
inputStream.close();
urlConnection.disconnect();
} catch (Exception e) { // 异常Exception
e.printStackTrace();
downloadCallback.onDownError(e.toString());
curTask = null;
}
}