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我有一個音樂列表。在我的一行listview中，我有播放按鈕。 當用戶點擊播放按鈕，它開始播放我的音樂，我改變我的播放按鈕的背景。 我想要當用戶選擇另一個位置玩，先前的播放按鈕背景更改爲未選中，並選擇新的背景。 另一個我的問題是，當我滾動我的列表視圖時，我的背景更改爲第一張圖片，並且它不顯示正在播放哪個位置。我想當我的列表視圖更新時，我無法保存我的位置。如何保存我在listview中的位置並在滾動時更改我按鈕的圖像
這裏是我的代碼（這是我的播放按鈕點擊），
play.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
if (rowView != lastview || mediaPlayer == null) {
play.setImageResource(R.drawable.n_btn_play_selected);
play(position);
indexStore.setindex(position);
if (lastview != null)
lastview = rowView;
} else {
indexStore.setindex(0);
play.setImageResource(R.drawable.n_btn_play_unselected);
mediaPlayer.release();
//lastview.setBackgroundResource(R.drawable.btn_white_matte);
lastview = null;
}
}
});
，這裏是我的全班同學：
public class Main extends Activity {
static Splash splash;
public static AppList applist;
static Noti_Queue noti_queue;
public static Video_List video_list;
AutoUpdatePushe autoUpdatePushe;
ListView listView;
Adaptor adaptor;
private MediaPlayer mediaPlayer;
static View lastview = null;
static MyIndexStore indexStore;
public static Routpic routpic;
static List<String> array_audio = new ArrayList<String>();
List<String> lines1 = new ArrayList<String>();
List<String> lines2 = new ArrayList<String>();
InputStream in;
BufferedReader reader;
String line = "1";
String[] tracks;
String[] names;
String[] infos;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
indexStore = new MyIndexStore(getApplicationContext());
setContentView(R.layout.main_activity);
routpic = new Routpic(getApplicationContext());
autoUpdatePushe = new AutoUpdatePushe(getApplicationContext());
if (splash == null) {
splash = new Splash(this);
splash.set_identity("1");
}
if (applist == null) {
applist = new AppList(this);
applist.set_identity("1");
}
if (noti_queue == null) {
noti_queue = new Noti_Queue(this);
noti_queue.set_identity("1");
}
if (video_list == null) {
video_list = new Video_List(this);
video_list.set_identity("1");
}
Button video = (Button) findViewById(R.id.rate_btn);
if (getResources().getString(R.string.showvideolist).equals("1")) {
video.setVisibility(View.VISIBLE);
} else {
video.setVisibility(View.INVISIBLE);
}
initiate();
mediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.a15);
listView = (ListView) findViewById(R.id.list);
ReadText1();
names = lines1.toArray(new String[0]);// = {"track one","the seconnd track","a nice track","name name name","the seconnd track","a nice track","name name name"};
ReadText2();
infos = lines2.toArray(new String[0]);
tracks = array_audio.toArray(new String[0]);
adaptor = new Adaptor(getApplicationContext(), tracks, names, infos);
listView.setAdapter(adaptor);
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer arg0) {
if (lastview != null) {
ImageView play = (ImageView) lastview.findViewById(R.id.play_stop);
play.setImageResource(R.drawable.n_btn_play_unselected);
}
}
});
}
private static void initiate() {
XmlPullParserFactory pullParserFactory;
try {
pullParserFactory = XmlPullParserFactory.newInstance();
XmlPullParser parser = pullParserFactory.newPullParser();
InputStream in_s = G.context.getAssets().open("temp.xml");
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
parser.setInput(in_s, null);
routpic.parseXML(parser);
} catch (XmlPullParserException e) {
e.printStackTrace();
Log.i("EROR", "nabod");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.i("EROR", "nabod");
}
array_audio.clear();
for (int i = 0; i < routpic.names.size(); i++) {
array_audio.add(routpic.names.get(i));
Log.i("LOG2", "" + routpic.names.get(i));
}
}
private void play(int index) {
mediaPlayer.release();
index++;
String s = "mp3/a" + index + ".mp3";
//Resources resources = getResources();
AssetFileDescriptor afd;
try {
afd = getAssets().openFd(s);
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
mediaPlayer.prepare();
mediaPlayer.start();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
// final int resourceId = resources.getIdentifier(s , "raw", getPackageName());
@Override
protected void onPause() {
mediaPlayer.release();
listView.invalidateViews();
super.onPause();
}
private void ReadText1() {
lines1.clear();
line = "1";
try {
in = this.getAssets().open("names.txt");
reader = new BufferedReader(new InputStreamReader(in));
while (line != null) {
line = reader.readLine();
if (line != null)
lines1.add(line);
else
break;
}
} catch (IOException e) {
e.printStackTrace();
}
}
private void ReadText2() {
lines2.clear();
line = "1";
try {
in = this.getAssets().open("infos.txt");
reader = new BufferedReader(new InputStreamReader(in));
while (line != null) {
line = reader.readLine();
if (line != null)
lines2.add(line);
else
break;
}
} catch (IOException e) {
e.printStackTrace();
}
}
public class Adaptor extends ArrayAdapter<String> {
private final Context context;
private final String[] tracks;
private final String[] names;
private final String[] infos;
Typeface type_face;
public Adaptor(Context context, String[] tracks, String[] names, String[] infos) {
super(context, R.layout.track, tracks);
this.context = context;
this.tracks = tracks;
this.names = names;
this.infos = infos;
type_face = Typeface.createFromAsset(context.getAssets(), "ARLRDBD.TTF");
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View rowView = inflater.inflate(R.layout.track, parent, false);
// rowView.setBackgroundResource(R.drawable.btn_white_matte);
TextView name = (TextView) rowView.findViewById(R.id.track_name);
name.setText(names[position]);
name.setTypeface(type_face);
//TextView info = (TextView) rowView.findViewById(R.id.track_info);
//info.setText(infos[position]);
name.setTypeface(type_face);
AlphaAnimation fadeIn = new AlphaAnimation(0.0f, 1.0f);
rowView.setAnimation(fadeIn);
fadeIn.setDuration(500 * (position % 4));
////
final ImageView ringtone = (ImageView) rowView.findViewById(R.id.ringtone);
if (position == indexStore.getindex())
ringtone.setImageResource(R.drawable.n_btn_ringtone_seted);
final ImageView play = (ImageView) rowView.findViewById(R.id.play_stop);
ringtone.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
//ringtone.setImageResource(R.drawable.n_btn_ringtone_selected);
setringtone(position, ringtone);
//mediaPlayer.release();
//rowView .setBackgroundResource(R.drawable.btn_white_matte);
play.setImageResource(R.drawable.n_btn_play_unselected);
}
});
play.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
if (rowView != lastview || mediaPlayer == null) {
play.setImageResource(R.drawable.n_btn_play_selected);
play(position);
indexStore.setindex(position);
if (lastview != null)
lastview = rowView;
} else {
indexStore.setindex(0);
play.setImageResource(R.drawable.n_btn_play_unselected);
mediaPlayer.release();
//lastview.setBackgroundResource(R.drawable.btn_white_matte);
lastview = null;
}
}
});
return rowView;
}
private void setringtone(final int position, final ImageView ringtone) {
/*Intent intent = new Intent (context, Ringtone.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra("name", tracks[position]);
context.startActivity(intent);*/
//ringtone.setImageResource(R.drawable.n_btn_ringtone_unselected);
final RelativeLayout dialog = (RelativeLayout) findViewById(R.id.config);
dialog.setVisibility(View.VISIBLE);
Button ok = (Button) findViewById(R.id.ok_button);
Button cancel = (Button) findViewById(R.id.cancel_button);
Typeface type_face = Typeface.createFromAsset(context.getAssets(), "ARLRDBD.TTF");
ok.setTypeface(type_face);
cancel.setTypeface(type_face);
ok.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
indexStore.setindex(position);
set(tracks[position], 1, ringtone, position);
}
});
cancel.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
dialog.setVisibility(View.INVISIBLE);
mediaPlayer.release();
}
});
}
}
public void set(String name, int type, ImageView ringtone, int position) {
// mohammd
//set ringtone
//adaptor.setNotifyOnChange(true);
listView.invalidateViews();
Resources resources = getResources();
//final int id = resources.getIdentifier(name , "raw", getPackageName());//name 5
String ringtoneuri = Environment.getExternalStorageDirectory().getAbsolutePath() + "/media/ringtone";
File file1 = new File(ringtoneuri);
file1.mkdirs();
File newSoundFile = new File(ringtoneuri, names[position] + ".mp3");//+ ".mp3"
ContentResolver mCr = this.getContentResolver();
try {
byte[] readData = new byte[1024];
InputStream fis = getAssets().open("mp3/a" + name + ".mp3");
FileOutputStream fos = new FileOutputStream(newSoundFile);
int i = fis.read(readData);
while (i != -1) {
fos.write(readData, 0, i);
i = fis.read(readData);
}
fos.close();
} catch (IOException io) {
}
ContentValues values = new ContentValues();
values.put(MediaStore.MediaColumns.DATA, newSoundFile.getAbsolutePath());
values.put(MediaStore.MediaColumns.TITLE, names[position] + ".mp3");
values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mp3");
values.put(MediaStore.MediaColumns.SIZE, newSoundFile.length());
values.put(MediaStore.Audio.Media.ARTIST, R.string.app_name);
values.put(MediaStore.Audio.Media.IS_RINGTONE, true);
values.put(MediaStore.Audio.Media.IS_NOTIFICATION, true);
values.put(MediaStore.Audio.Media.IS_ALARM, true);
values.put(MediaStore.Audio.Media.IS_MUSIC, false);
Uri uri = MediaStore.Audio.Media.getContentUriForPath(newSoundFile.getAbsolutePath());
Uri newUri = mCr.insert(uri, values);
try {
Uri rUri = RingtoneManager.getValidRingtoneUri(this);
RingtoneManager ringtoneManager = new RingtoneManager(getApplicationContext());
if (rUri != null)
ringtoneManager.setStopPreviousRingtone(true);
switch (type) {
case 1:
//ring tone
ringtoneManager.setActualDefaultRingtoneUri(getApplicationContext(), RingtoneManager.TYPE_RINGTONE, newUri);
break;
case 2:
//Notification
RingtoneManager.setActualDefaultRingtoneUri(getApplicationContext(), RingtoneManager.TYPE_NOTIFICATION, newUri);
break;
case 3:
//Alarm
RingtoneManager.setActualDefaultRingtoneUri(getApplicationContext(), RingtoneManager.TYPE_ALARM, newUri);
break;
default:
//ringtone
RingtoneManager.setActualDefaultRingtoneUri(getApplicationContext(), RingtoneManager.TYPE_RINGTONE, newUri);
break;
}
} catch (Throwable t) {
Log.e("catch", "catch exception" + t.getMessage());
}
RelativeLayout dialog = (RelativeLayout) findViewById(R.id.config);
dialog.setVisibility(View.INVISIBLE);
mediaPlayer.release();
Toast.makeText(getApplicationContext(), getResources().getString(R.string.set_message), Toast.LENGTH_LONG).show();
}
public void more(View view) {
applist.Display();
}
@Override
public void onBackPressed() {
splash.Display();
splash = null;
super.onBackPressed();
}
public void video(View view) {
video_list.Display();
}
}
在您的適配器「selectedTrack」中添加一個變量，您可以在getView –
中重用如何更改它？ – user7908469
使用onClickListener中的新位置更改它，然後在getView中檢查所選位置以設置行背景。 –