Log.i("Message",url);
if (url.indexOf(".apk")!=-1){
new HttpThread(url).start();
}
百度助手下载apk不是以.apk结尾的，亲测链接为http://w.gdown.baidu.com/data/wisegame/4f2a4034ebbc4ac1/shoujijingdong_34669.apk?f=m1101，需要修改。将权限添加上，websettings即可
试试这个代码
DownloadManager downloadManager = (DownloadManager) MainActivity.this.getSystemService(DOWNLOAD_SERVICE);
Uri uri = Uri.parse(url);
DownloadManager.Request request = new DownloadManager.Request(uri);
long download...
