Android 如何实现inapp下载mp3文件
在我的应用程序中,Android 如何实现inapp下载mp3文件,android,download,android-recyclerview,in-app,Android,Download,Android Recyclerview,In App,在我的应用程序中,RecylerView 每个mp3文件都有下载按钮 我想要的是: 如何在点击下载时实现应用内下载功能 按钮 在列表\u item.xml上创建一个按钮。。在该按钮上,单击“实现此代码” btn.setOnclickListner(new View.OnClickListner(){ new DownloadFileAsync().execute("your mp3 url from api"); }); 创建用于下载文件的异步任务类 class Download
RecylerView
每个mp3文件都有下载按钮
我想要的是:
如何在点击下载时实现应用内下载功能
按钮
在
列表\u item.xml
上创建一个按钮。。在该按钮上,单击“实现此代码”
btn.setOnclickListner(new View.OnClickListner(){
new DownloadFileAsync().execute("your mp3 url from api");
});
创建用于下载文件的异步任务类
class DownloadFileAsync extends AsyncTask <String, String, String> {
ProgressDialog mProgressDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog = new ProgressDialog(this);
mProgressDialog.setMessage("Downloading file..");
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setCancelable(false);
mProgressDialog.show();
}
@Override
protected String doInBackground(String... aurl) {
int count;
try {
URL url = new URL(aurl[0]);
URLConnection conexion = url.openConnection();
conexion.connect();
int lenghtOfFile = conexion.getContentLength();
Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream("/sdcard/some_file.jpg");
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
publishProgress(""+(int)((total*100)/lenghtOfFile));
output.write(data, 0, count);
}
output.flush();
output.close();
input.close();
} catch (Exception e) {}
return null;
}
protected void onProgressUpdate(String... progress) {
Log.d("ANDRO_ASYNC",progress[0]);
mProgressDialog.setProgress(Integer.parseInt(progress[0]));
}
@Override
protected void onPostExecute(String progress) {
mProgressDialog.dismiss();
}
}
class DownloadFileAsync扩展了AsyncTask{
进程对话框;
@凌驾
受保护的void onPreExecute(){
super.onPreExecute();
mProgressDialog=新建进度对话框(此);
设置消息(“下载文件…”);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_水平);
mProgressDialog.setCancelable(假);
mProgressDialog.show();
}
@凌驾
受保护的字符串背景(字符串…aurl){
整数计数;
试一试{
URL=新URL(aurl[0]);
URLConnection conexion=url.openConnection();
conexion.connect();
int lenghtOfFile=conexion.getContentLength();
Log.d(“ANDRO_ASYNC”,“文件长度:“+lenghtOfFile”);
InputStream输入=新的BufferedInputStream(url.openStream());
OutputStream output=newfileoutputstream(“/sdcard/some_file.jpg”);
字节数据[]=新字节[1024];
长总计=0;
而((计数=输入。读取(数据))!=-1){
总数+=计数;
出版进度(“+(int)((总计*100)/长度文档));
输出.写入(数据,0,计数);
}
output.flush();
output.close();
input.close();
}捕获(例外e){}
返回null;
}
受保护的void onProgressUpdate(字符串…进度){
Log.d(“ANDRO_ASYNC”,progress[0]);
mProgressDialog.setProgress(Integer.parseInt(progress[0]));
}
@凌驾
受保护的void onPostExecute(字符串进度){
mProgressDialog.disclose();
}
}
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