应用在Android 4.0+上崩溃

Question

我有一个适用于android 4.0的android应用程序，但在android 4.3和4.4上崩溃。 我从logCat得到这个

01-11 14:40:27.669: E/ACRA(25835): ACRA caught a IllegalStateException exception for quran. Building report.
01-11 14:40:27.789: E/AndroidRuntime(25835): java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131099688, class android.widget.ListView) with Adapter(class quran.functions.PlaylistAdapter)]

这是我的代码：

public class Playlist extends FragmentActivity {

    private ListView list;
    private Button manager, downloadAll;
    private TextView reciter;
    public static PlaylistAdapter adapter;
    private ArrayList<Songs> songs;
    private int RECITER_ID;
    private String url, title, label;
    private SlidingMenu slidingMenu;
    private DatabaseHelper db;
    private ImageView nowPlaying, back;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.playlist);
        initWidgets();
        list.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1,
                    int position, long arg3) {

                Intent intent = new Intent(Playlist.this, PlayerFinal.class);
                intent.putExtra("songs", songs);
                if (getIntent().getIntExtra("duaa", -1) == 115)
                    intent.putExtra("lang", 115);
                intent.putExtra("position", position);
                intent.putExtra("fromClass", this.getClass() + "");
                // intent.putExtra("mp3link", mp3link);
                startActivity(intent);
            }
        });
        new AsyncTask<Void, Void, Void>() {
            @Override
            protected Void doInBackground(Void... params) {

                XmlMapParser m = new XmlMapParser(Playlist.this, RECITER_ID);
                HashMap<String, ArrayList<String>> map = m.convert();
                map.keySet();
                label = map.get("RecitorLabel").get(0);
                title = map.get("Title").get(0);
                url = map.get("Link").get(0);
                back = (ImageView) findViewById(R.id.playlist_back);
                back.setOnClickListener(new OnClickListener() {

                    @Override
                    public void onClick(View arg0) {
                        finish();
                    }
                });
                db.openDB();
                for (int i = 1; i < map.get("Link").size(); i++) {
                    if (db.isDownloaded(i, title, RECITER_ID)) {
                        songs.add(new Songs(i, map.get("Title").get(i),
                                Environment.getExternalStorageDirectory()
                                        .getPath()
                                        + "/"
                                        + getString(R.string.app_name)
                                        + "/"
                                        + title
                                        + "/"
                                        + map.get("Title").get(i)
                                        + ".mp3", title, true, RECITER_ID,
                                false));

                    } else
                        songs.add(new Songs(i, map.get("Title").get(i), url
                                + label + "/"
                                + new DecimalFormat("000").format(i) + ".mp3",
                                title, false, RECITER_ID, false));
                }
                db.closeDB();
                // Log.v("--",m.convert().get("Link").get(1));
                // [RecitorLabel, Title, Link] THIS ARE THE KEYS m

                // Log.v("--", map.get("RecitorLabel").get(0));
                // Log.v("--", map.get("Link").get(1));
                return null;
            }

            protected void onPostExecute(Void result) {
                adapter = new PlaylistAdapter(Playlist.this, songs);
                list.setAdapter(adapter);
                reciter.setText(songs.get(0).getRecitorName());
            };
        }.execute();

    }

    @Override
    public void onBackPressed() {
        if (slidingMenu.isMenuShowing()) {
            slidingMenu.toggle();
        } else {
            super.onBackPressed();
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        try {
            if (Tplayer.getInstance().isPlaying()) {
                adapter = new PlaylistAdapter(this, songs);
                list.setAdapter(adapter);
                adapter.notifyDataSetChanged();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_MENU) {
            this.slidingMenu.toggle();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            this.slidingMenu.toggle();
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

    private void initWidgets() {
        db = new DatabaseHelper(this);
        manager = (Button) findViewById(R.id.playlist_download_manager);
        manager.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Playlist.this, DownloadManager.class);
                startActivity(intent);
            }
        });
        reciter = (TextView) findViewById(R.id.playlist_reciter_name_top);
        list = (ListView) findViewById(R.id.playlist_list);
        downloadAll = (Button) findViewById(R.id.playlist_download_all);
        manager = (Button) findViewById(R.id.playlist_download_manager);
        songs = new ArrayList<Songs>();
        RECITER_ID = getIntent().getIntExtra("filename", -1);
        // downloadAll.setOnClickListener(new OnClickListener() {
        //
        // @Override
        // public void onClick(View v) {
        // new DownloadAll(Playlist.this, songs);
        // db.openDB();
        // for (int i = 0; i < songs.size(); i++) {
        // db.addDownloaded(songs.get(i).getNumber(), songs.get(i)
        // .getLink(), 0, songs.get(i).getRecitorID(), "",
        // songs.get(i).getTitle());
        // }
        // db.closeDB();
        // }
        // });
        nowPlaying = (ImageView) findViewById(R.id.playlist_now_playing);
        nowPlaying.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Tplayer tplayer = Tplayer.getInstance();
                if (tplayer.isPlaying()) {
                    Intent intent = new Intent(Playlist.this, PlayerFinal.class);
                    if (tplayer.isPlaying())
                        intent.putExtra("songs", tplayer.getSongs());
                    else
                        intent.putExtra("songs", songs);
                    if (tplayer.getSongs().size() == 14)
                        intent.putExtra("lang", 115);
                    intent.putExtra("position", tplayer.getPosition());
                    startActivity(intent);
                }
            }
        });
        // Jeremy Feinstein slidinglistadapter line 94
        slidingMenu = new SlidingMenu(this);
        slidingMenu.setMode(SlidingMenu.LEFT);
        slidingMenu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
        slidingMenu.setShadowWidthRes(R.dimen.slidingmenu_shadow_width);
        slidingMenu.setShadowDrawable(R.drawable.slidingmenu_shadow);
        slidingMenu.setBehindOffsetRes(R.dimen.slidingmenu_offset);
        slidingMenu.setFadeDegree(0.35f);
        slidingMenu.attachToActivity(this, SlidingMenu.SLIDING_CONTENT);
        slidingMenu.setMenu(R.layout.slidingmenu);

    }

}

和我的播放列表适配器类：

public class PlaylistAdapter extends BaseAdapter {

    private Activity activity;
    private static LayoutInflater inflater = null;
    private ArrayList<Songs> data;
    private DatabaseHelper db;
    private SharedPreferences prefs;
    int playpos;
    int recitorID;

    public PlaylistAdapter(Activity a, ArrayList<Songs> songs) {
        activity = a;
        data = songs;
        db = new DatabaseHelper(a);
        inflater = (LayoutInflater) activity
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        prefs = activity.getSharedPreferences("quantic.Quran",
                Context.MODE_PRIVATE);
        recitorID = prefs.getInt("recID", -1);
        playpos = prefs.getInt("posPlaying", -1);
    }

    public int getCount() {
        return data.size();
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(final int position, View convertView,
            final ViewGroup parent) {
        View vi = convertView;
        if (convertView == null)
            vi = inflater.inflate(R.layout.song_item, parent, false);

        ImageView download = (ImageView) vi
                .findViewById(R.id.playlist_item_download);
        db.openDB();
        if (db.isDownloaded(data.get(position).getNumber(), data.get(position)
                .getRecitorName(), data.get(position).getRecitorID()))
            download.setImageResource(R.drawable.download_yes);
        else {
            download.setImageResource(R.drawable.download_no);
            download.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {

                    new DownloadFileFromURL(activity, data.get(position)
                            .getRecitorName(), data.get(position).getTitle(),
                            data.get(position).getLink(), data.get(position)
                                    .getNumber(), data.get(position)
                                    .getRecitorID()).execute();
                    if (!db.isDBOpen())
                        db.openDB();
                    db.addDownloaded(data.get(position).getNumber(),
                            data.get(position).getLink(), 0, data.get(position)
                                    .getRecitorID(), "", data.get(position)
                                    .getTitle());

                    Toast.makeText(activity,
                            "Downloading " + data.get(position).getTitle(),
                            Toast.LENGTH_SHORT).show();

                }
            });
        }
        db.closeDB();

        TextView number = (TextView) vi.findViewById(R.id.playlist_item_num);
        TextView reciterName = (TextView) vi
                .findViewById(R.id.playlist_item_reciterName);
        reciterName.setText(data.get(position).getRecitorName());
        if (activity.getClass() == Playlist.class) {
            reciterName.setVisibility(View.GONE);
        }
        TextView title = (TextView) vi.findViewById(R.id.playlist_item_reciter);
        title.setText(data.get(position).getTitle());
        number.setText((position + 1) + "");
        ImageView eq = (ImageView) vi.findViewById(R.id.playlist_item_equlizer);
        if (Tplayer.getInstance().isPlaying())
            if (Tplayer.getInstance().getPosition() == position
                    && data.get(position).getRecitorID() == Tplayer
                            .getInstance().getSong().getRecitorID()) {
                eq.setVisibility(View.VISIBLE);
                Ion.with(eq).load("http://darkodev.info/quran/dots.gif");
            } else {
                eq.setVisibility(View.GONE);
            }

        return vi;
    }
}

Answer 1

很老的问题，但没有答案。 我确定您现在已经找到了解决方法，但是无论如何。

您正在后台更改歌曲列表对象，并且如果Android决定重新绘制列表（用户滚动您的列表），从而有效地访问歌曲列表对象，则它可能已更改并导致抛出此异常。

您需要使用临时歌曲列表并创建一个新的适配器来更新列表，因此，除非您从主UI线程设置了新的适配器，否则不要更改当前的适配器列表。