列表視圖項不在API 19上單擊，但單擊上API的

Question

我正在嘗試開發音樂播放器應用程序。

首先，我從listview中選擇音樂。然後音樂播放屏幕隨着選定的音樂打開。同時出現通知。無論您身處何處，如果您點擊通知，音樂播放器屏幕將以當前音樂打開。然後，如果你願意，你可以按回來按鈕去音樂列表。

關於API 19's;在通知音樂播放畫面並按下後退按鈕後，會顯示音樂列表，但不會點擊項目。但更高的API沒有問題。

唯一的麻煩;從通知面板上的API 19後。

我不明白這個問題。音樂列表onCreate方法如下。

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.showmusicfiles); 

    filesFound=(ListView)findViewById(R.id.files_found); 
    items = new ArrayList<FileItem>(); 

    context = getApplicationContext(); 

    String path = Environment.getExternalStorageDirectory() + 
      File.separator + "MusicApp"+File.separator+"mp3"; 
    File f = new File(path); 
    final File fileList[] = f.listFiles(); 
    for (File file : f.listFiles()) { 

     FileItem item=new FileItem(); 
     item.setDescription(file.getName()); 
     item.setFullPath(file.getAbsolutePath()); 
     items.add(item); 
    } 

    searchResults=sortByDate(items); 

    adapter = new ArrayAdapter<FileItem>(getApplicationContext(), R.layout.music_file_item, searchResults){ 
     @Override 
     public View getView(final int position, View convertView, ViewGroup parent) { 
      if(convertView == null){ 
       convertView = getLayoutInflater().inflate(R.layout.music_file_item, parent, false); 
      } 

      TextView description = (TextView)convertView.findViewById(R.id.file_description); 

      final FileItem searchResult = searchResults.get(position); 
      description.setText(searchResult.getDescription().replace(".mp3","")); 

      convertView.setOnLongClickListener(new View.OnLongClickListener() { 
       @Override 
       public boolean onLongClick(View v) { 
        DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener() { 
         @Override 
         public void onClick(DialogInterface dialog, int which) { 
          switch (which){ 
           case DialogInterface.BUTTON_POSITIVE: 
            deleteFileFromList(searchResults.get(position).getFullPath(),position); 
            break; 

           case DialogInterface.BUTTON_NEGATIVE: 
            toast("yoh dedın"); 
            break; 
          } 
         } 
        }; 

        AlertDialog.Builder builder = new AlertDialog.Builder(ShowMusicFiles.this); 
        builder.setMessage("Are you sure you want to delete").setPositiveButton("Yes", dialogClickListener) 
          .setNegativeButton("No", dialogClickListener).show(); 


        return true; 
       } 
      }); 



      convertView.setOnClickListener(new View.OnClickListener(){ 
       @Override 
       public void onClick(View v){ 
        FileTypeList = new ArrayList<File>(); 
        FileTypeList = FileItemToFile(searchResults); 
        DescriptionList= new ArrayList<String>(); 
        DescriptionList = getDescriptionList(searchResults); 

        playerIntent = new Intent(context, MusicPlayer.class); 
        playerIntent.putExtra("songPosition",position); 
        playerIntent.putExtra("songList",FileTypeList); 
        playerIntent.putExtra("descriptionList",DescriptionList); 
        playerIntent.putExtra("fromWhere","musicList"); 

        playerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
        context.startActivity(playerIntent); 
       } 
      }); 
      return convertView; 
     } 
    }; 

    filesFound.setAdapter(adapter); 

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    final ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); 
    drawer.setDrawerListener(toggle); 
    toggle.syncState(); 

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view_music); 
    navigationView.setNavigationItemSelectedListener(this); 
} 

我在音樂播放屏幕上的背按方式只包含一個意圖去音樂列表頁面。所以我不認爲我需要寫音樂播放代碼。

感謝。

@Override 
public void onBackPressed() { 
    Intent goToMusicList = new Intent(MusicPlayer.this,ShowMusicFiles.class); 
    startActivity(goToMusicList); 
} 

Answer 1

在filesFound.setAdapter(adapter)之前致電filesFOund.invalidate()。如果這樣不能解決問題，請嘗試將ShowMusicFiles活動的launchMode設置爲singleTop。