1. Please see the code. Here I give a method to download apk, this method needs to pass the download address of apk
private String appUrl; //应用升级地址
private String appName="xxxxx"; //应用名称
private String updateFile; //最新APK的路径
private HttpURLConnection connection;
private final int NEW_MESSAGE_ID = 0;
/**
* 下载更新APK文件
*
* @param appUrl apk的下载地址
* @return 自己定义的消息通知
*/
private int downloadUpdateFile(final String appUrl) {
try {
//设置进度条操作
URL url = new URL(appUrl);
//打开和URL之间的连接
connection = (HttpURLConnection) url.openConnection();
//设置网络请求
connection.setRequestMethod("GET");
//开始读取服务器端数据，到了指定时间还没有读到数据，则报超时异常
connection.setReadTimeout(50000);
//要取得长度,要求http请求不要gzip压缩
connection.setRequestProperty("Accept-Encoding", "identity"); // 添加这行代码
//建立实际的连接
connection.connect();
//这里开启一个子线程，如果要更新UI，请切换到主线程
new Thread(new Runnable() {
@Override
public void run() {
int total_length = 0;
BufferedOutputStream bos = null;
BufferedInputStream bis = null;
try {
if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
InputStream is = connection.getInputStream();
bis = new BufferedInputStream(is);
Log.d("111333", "走到版本更新这里，需要更新，打印文件路径="+getApplicationContext().getExternalFilesDir(null).getPath());
//在这里设置apk下载后保存的绝对路径
// String path= UpdateUtils.getDiskCacheDir(mContext,"xupdate")+ File.separator + checkVersionResult.getVersionName();
// File cacheDir = new File(path);
// Log.d("111333", "走到版本更新这里，需要更新，打印新的文件路径="+path);
//创建文件路径
File cacheDir = new File(getApplicationContext().getExternalFilesDir(null).getPath());
if (!cacheDir.exists()) {
cacheDir.mkdirs();
}
//创建文件夹
//通过输出流，下载到指定的本地文件目录
File file = new File(cacheDir, appName + ".apk");
if (!file.exists()) {
file.createNewFile();
}
//检查SD卡的状态是否可用
// if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
// Toast.makeText(UpdateService.this, "SD卡不可用~", Toast.LENGTH_SHORT).show();
// }
FileOutputStream fos = new FileOutputStream(file);
bos = new BufferedOutputStream(fos);
//获取文件流大小，更新进度
byte[] buffer = new byte[1024 * 8];
int len;
int pro1 = 0;
long file_length = connection.getContentLength();
while ((len = bis.read(buffer)) != -1) {
bos.write(buffer, 0, len);
total_length += len;
if (file_length > 0) {
pro1 = (int) ((total_length / (float) file_length) * 100);//进度条传递进度
// builder.setProgress(100, pro1, false);
Log.d("111333", "走到下载" + pro1 + "%");
// builder.setContentText("下载" + pro1 + "%");
}
}
// builder.setStyle(new NotificationCompat.BigTextStyle().bigText("下载完成,点击安装")); //显示多行文本
updateFile = file.getAbsolutePath();
Log.d("111333", "下载路径:" + updateFile);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
//关闭资源,先关闭外层流，在关闭内层流
try {
if (bis != null) {
bis.close();
}
} catch (IOException e) {
e.printStackTrace();
}
try {
if (bos != null) {
bos.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}).start();
} catch (Exception e) {
e.printStackTrace();
}
return NEW_MESSAGE_ID;
}