Music Playback Function Button implementation

Import Java.io.File;

Import java.util.ArrayList;

Import java.util.List;

Import android.app.Activity;

Import Android.app.AlertDialog;

Import Android.content.DialogInterface;

Import Android.media.MediaPlayer;

Import Android.os.Bundle;

Import android.view.KeyEvent;

Import Android.view.View;

Import Android.view.View.OnClickListener;

Import Android.widget.AdapterView;

Import Android.widget.AdapterView.OnItemClickListener;

Import Android.widget.ArrayAdapter;

Import Android.widget.Button;

Import Android.widget.ListView;

public class Mainactivity extends Activity {

Private MediaPlayer MP;

Private list<string> List = new arraylist<string> ();

private int location = 0; //Index of the currently playing song

Private Button play;

Private Button up;

Private Button Next;

Private Button Replay;

Private Boolean flag = false;

Private Button stop;

@Override

protected void OnCreate (Bundle savedinstancestate) {

Super.oncreate (savedinstancestate);

Setcontentview (R.layout.activity_main);

Play = (Button) Findviewbyid (R.id.bt_play);

up = (Button) Findviewbyid (R.ID.BT_UP);

Next = (Button) Findviewbyid (R.id.bt_next);

Replay = (Button) Findviewbyid (R.id.bt_replay);

Stop = (Button) Findviewbyid (r.id.bt_stop);

Replay.setenabled (FALSE);

MP = new MediaPlayer ();

Showlist ();

Play.setonclicklistener (New Onclicklistener () {

@Override

public void OnClick (View v) {

if (flag = = False) {

Playmusic (List.get (location));

Play.settext ("| |");

Flag = true;

Replay.setenabled (TRUE);

} else {

Yesorno ();

}

}

});

Up.setonclicklistener (New Onclicklistener () {

@Override

public void OnClick (View v) {

Upmusic ();

}

});

Next.setonclicklistener (New Onclicklistener () {

@Override

public void OnClick (View v) {

Nextmusic ();

}

});

Replay.setonclicklistener (New Onclicklistener () {

@Override

public void OnClick (View v) {

Mp.seekto (0);

Mp.start ();

Play.settext ("| |");

}

});

Stop.setonclicklistener (New Onclicklistener () {

@Override

public void OnClick (View v) {

Mp.stop ();

Flag = false;

Play.settext ("");

Replay.setenabled (FALSE);

}

});

}

/*

*

* Show music files in the ListView

*/

private void Showlist () {

GetFile ("/mnt/sdcard/qqmusic/import/"); //Get all the music files on the SD card

arrayadapter<string> adapter = new Arrayadapter<string> (This,

Android. R.layout.simple_list_item_1, list); //Create an adaptation Device

ListView lv_list = (ListView) Findviewbyid (R.id.lv_list);

Lv_list.setadapter (adapter);

Lv_list.setonitemclicklistener (New Onitemclicklistener () {

@Override

public void Onitemclick (adapterview<?> arg0, View arg1, int arg2,

Long Arg3) {

location = arg2;

Playmusic (List.get (location));

}

});

}

/*

* Get music files

*/

public void getFile (String URL) {

File files = new file (URL);

file[] File = Files.listfiles ();

for (File f:file) {

if (F.isdirectory ()) { //If it is a folder-(there is a problem here, address write full code but this can work, otherwise null, need to improve )

GetFile (F.getabsolutepath ()); //Recursive call--(there is a problem here, address write full code but this can work, otherwise null, need to improve )

} else {

if (Isaudiofile (F.getpath ())) { //if it is a prescribed file format

List.add (F.getpath ()); //Add a file to the collection

}

}

}

}

/*

*

* Determine file format

*/

Private Boolean Isaudiofile (String path) {

if (Path.contains ("MP3")) {

return true;

}

return false;

}

/*

*

* Play

*/

public void Playmusic (String path) {

if (mp.isplaying ()) {

Mp.stop ();

}

Mp.reset (); //Reset MediaPlayer

try {

Mp.setdatasource (path);

Mp.prepare ();

Mp.start ();

Play.settext ("| |");

Flag = true;

Replay.setenabled (TRUE);

} catch (Exception e) {

TODO auto-generated Catch block

E.printstacktrace ();

}

}

/*

*

* Pause, continue

*/

public void Yesorno () {

if (MP! = null && mp.isplaying ()) {

Mp.pause ();

Play.settext ("");

} else {

Mp.start ();

Play.settext ("| |");

}

}

/*

*

* Next Song

*/

public void Nextmusic () {

if (++location > List.size ()) {

Location = 0;

}

Play.settext ("| |");

Flag = true;

Replay.setenabled (TRUE);

Playmusic (List.get (location));

}

/*

*

* Last Song

*/

public void Upmusic () {

if (--location < 0) {

Location = List.size ()-1;

}

Play.settext ("| |");

Flag = true;

Replay.setenabled (TRUE);

Playmusic (List.get (location));

}

@Override

protected void OnDestroy () {

if (mp.isplaying ()) {

Mp.stop ();

}

Mp.release ();

Super.ondestroy ();

}

This article is from the "Android Small Notes" blog, please be sure to keep this source http://dreamwing.blog.51cto.com/9872128/1619519

Music Playback Function Button implementation