Notificaton+IntentService下载下载音乐
思路1.后台下载用IntentService2.获得文件总长度3.每隔多长时间发送通知
详细代码Service.javaActivity.java
思路
1.后台下载用IntentService
2.获得文件总长度
3.每隔多长时间发送通知
详细代码
Service.java
public class DownLoadMusicService extends IntentService {
public InputStream inputStream
;
public int total
;
public NotificationManager manager
;
public int notificaton_id
= 100;
public NotificationCompat
.Builder builder
;
public Handler handler
= new Handler();
public int currentProgress
= 0;
HttpURLConnection connection
;
public DownLoadMusicService() {
super("LoadMusic");
}
@RequiresApi(api
= Build
.VERSION_CODES
.O
)
@Override
public int onStartCommand(@Nullable Intent intent
, int flags
, int startId
) {
initNotification();
startForeground(notificaton_id
, builder
.build());
return super.onStartCommand(intent
, flags
, startId
);
}
@Override
protected void onHandleIntent( @Nullable Intent intent
) {
String path
= intent
.getStringExtra("url");
try {
URL url
= new URL(path
);
connection
= (HttpURLConnection
) url
.openConnection();
connection
.setRequestProperty("Accept-Encoding", "identity");
total
= connection
.getContentLength();
if(connection
.getResponseCode() == 200){
handler
.post(nThread
);
inputStream
= connection
.getInputStream();
int len
= 0;
byte[] bytes
= new byte[60];
File file0
= Environment
.getExternalStorageDirectory();
File newFile
= new File(file0
,"dabeizhou.mp3");
FileOutputStream fileOutputStream
= new FileOutputStream(newFile
);
while ((len
= inputStream
.read(bytes
)) != -1){
currentProgress
+=len
;
fileOutputStream
.write(bytes
,0,len
);
}
Log
.d("amy",currentProgress
+"--");
}
} catch (MalformedURLException e
) {
e
.printStackTrace();
} catch (IOException e
) {
e
.printStackTrace();
}
finally {
try {
if(inputStream
!= null
)
inputStream
.close();
} catch (IOException e
) {
e
.printStackTrace();
}
if(connection
!= null
)
connection
.disconnect();
}
}
@RequiresApi(api
= Build
.VERSION_CODES
.O
)
public void initNotification(){
manager
= (NotificationManager
) getSystemService(NOTIFICATION_SERVICE
);
NotificationChannel channel
= new NotificationChannel("channel_1","name",NotificationManager
.IMPORTANCE_LOW
);
manager
.createNotificationChannel(channel
);
builder
= new NotificationCompat.Builder(this,"channel_1")
.setSmallIcon(R
.mipmap
.bq1
)
.setContentText("下载文件")
.setContentText("下载中。。");
}
Thread nThread
= new Thread(){
@Override
public void run() {
super.run();
builder
.setProgress(total
,currentProgress
,false);
manager
.notify(notificaton_id
,builder
.build());
handler
.postDelayed(nThread
,1000);
}
};
@Override
public void onDestroy() {
super.onDestroy();
handler
.removeCallbacks(nThread
);
}
}
Activity.java
public void downloadMusic(View view
) {
Intent intent
= new Intent(this,DownLoadMusicService
.class);
intent
.putExtra("url","http://m10.music.126.net/20200704095418/39a88357cd32cb186ccaed3699cd2083/ymusic/8481/cbba/7868/c96fe64c4a34c2137ce30e5f941b145c.mp3");
startService(intent
);
}
